<?php

namespace FluentCart\App\Models;

use FluentCart\Api\ModuleSettings;
use FluentCart\App\App;
use FluentCart\App\Helpers\Helper;
use FluentCart\App\Helpers\Status;
use FluentCart\App\Models\Concerns\CanSearch;
use FluentCart\App\Models\Concerns\CanUpdateBatch;
use FluentCart\App\Models\Concerns\HasActivity;
use FluentCart\App\Services\DateTime\DateTime;
use FluentCart\App\Services\OrderService;
use FluentCart\App\Services\TemplateService;
use FluentCart\App\Services\URL;
use FluentCart\Framework\Database\Orm\Builder;
use FluentCart\Framework\Database\Orm\Relations\BelongsTo;
use FluentCart\Framework\Database\Orm\Relations\HasMany;
use FluentCart\Framework\Database\Orm\Relations\HasManyThrough;
use FluentCart\Framework\Database\Orm\Relations\HasOne;
use FluentCart\Framework\Database\Orm\Relations\MorphMany;
use FluentCart\Framework\Support\Arr;
use FluentCart\App\Services\Renderer\Receipt\TaxSummaryHelper;
use FluentCartPro\App\Modules\Licensing\Models\License;

/**
 *  Order Model - DB Model for Orders
 *
 *  Database Model
 *
 * @package FluentCart\App\Models
 *
 * @version 1.0.0
 */
class Order extends Model
{
    use CanSearch, HasActivity, CanUpdateBatch;

    protected $table = 'fct_orders';

    public static function boot()
    {
        parent::boot();
        static::creating(function ($model) {
            if (empty($model->uuid)) {
                $model->uuid = static::generateOrderUuid();
            }

            if (!isset($model->config)) {
                $model->config = [];
            }

            if ($model->payment_status === 'paid' || apply_filters('fluent_cart/create_receipt_number_on_order_create', false)) {
                $model->receipt_number = OrderService::getNextReceiptNumber();
                $model->invoice_no = OrderService::getInvoicePrefix() . $model->receipt_number;
            }
        });

        static::created(function ($model) {
            // Every order carries a companion operations row. ReceiptHandler reads
            // sales_recorded off it to decide whether a receipt is being seen for the
            // first time, and that gates fluent_cart/after_receipt_first_time — an order
            // without the row silently never fires its purchase event.
            //
            // Created here rather than at each call site because orders also come from
            // renewals, subscription child orders, the admin and WP-CLI, none of which
            // pass through the checkout or dispatch fluent_cart/order_created.
            OrderOperation::query()->firstOrCreate(['order_id' => $model->id]);

            if ($model->invoice_no) {
                do_action('fluent_cart/order/invoice_number_added', [
                    'order' => $model
                ]);
            }
        });
    }

    /**
     * Generate a short, human-usable order handle: 12 uppercase alphanumeric
     * characters (e.g. A7K2P9X4M1Q8), stored in the `uuid` column and shown as
     * "#A7K2P9X4M1Q8" on the UI. Existing orders keep their legacy md5 uuids.
     *
     * Uniqueness is best-effort at the application level: a chunk of
     * candidates is generated and filtered against the table with a single
     * whereIn query (no per-candidate round-trips). There is intentionally no
     * DB unique constraint on `fct_orders.uuid`, so this check is NOT atomic —
     * two concurrent inserts could theoretically race on the same candidate.
     * Given the 36^12 (~4.7x10^18) space, a real collision is astronomically
     * unlikely, but not cryptographically guaranteed. If a hard guarantee is
     * ever required, add a unique index on the column and retry creation on a
     * duplicate-key error.
     *
     * @return string
     */
    public static function generateOrderUuid()
    {
        $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        $maxIndex = strlen($chars) - 1;
        $chunkSize = 20;

        do {
            // Generate a chunk of candidates, then resolve collisions with a
            // single query (whereIn) instead of one query per candidate. The
            // code is used as the array key so the chunk is self-deduplicated.
            $candidates = [];
            for ($i = 0; $i < $chunkSize; $i++) {
                $code = '';
                for ($j = 0; $j < 12; $j++) {
                    $code .= $chars[wp_rand(0, $maxIndex)];
                }
                $candidates[$code] = true;
            }

            $taken = static::whereIn('uuid', array_keys($candidates))
                ->get(['uuid'])
                ->pluck('uuid')
                ->toArray();

            foreach ($taken as $existing) {
                unset($candidates[$existing]);
            }
            // Loops again only if every candidate in the chunk collided, which
            // is astronomically unlikely for a 36^12 (~4.7x10^18) space.
        } while (empty($candidates));

        return array_key_first($candidates);
    }

    protected $fillable = [
        'status',
        'parent_id',
        'invoice_no',
        'receipt_number',
        'fulfillment_type',
        'type',
        'customer_id',
        'payment_method',
        'payment_method_title',
        'payment_status',
        'currency',
        'subtotal',
        'discount_tax',
        'manual_discount_total',
        'coupon_discount_total',
        'shipping_tax',
        'shipping_total',
        'fee_total',
        'tax_total',
        'tax_behavior',
        'total_amount',
        'rate',
        'note',
        'ip_address',
        'completed_at',
        'refunded_at',
        'total_refund',
        'uuid',
        'created_at',
        'refunded_at',
        'total_paid',
        'mode',
        'shipping_status',
        'config'
    ];

    protected $searchable = [
        'id',
        'total_amount',
        'status',
        'payment_method',
        'payment_status',
        'created_at',
        'updated_at',
    ];

    protected $casts = [
        'subtotal'              => 'double',
        'discount_tax'          => 'double',
        'manual_discount_total' => 'double',
        'coupon_discount_total' => 'double',
        'shipping_tax'          => 'double',
        'shipping_total'        => 'double',
        'fee_total'             => 'double',
        'tax_total'             => 'double',
        'tax_behavior'          => 'integer',
        'total_amount'          => 'double',
        'customer_id'           => 'integer',
    ];

    public function parentOrder(): BelongsTo
    {
        return $this->belongsTo(Order::class, 'parent_id', 'id');
    }

    public function children(): HasMany
    {
        return $this->hasMany(Order::class, 'parent_id', 'id');
    }

    public function transactions(): HasMany
    {
        return $this->hasMany(OrderTransaction::class, 'order_id', 'id');
    }

    public function subscriptions(): HasMany
    {
        return $this->hasMany(Subscription::class, 'parent_order_id', 'id');
    }

    public function order_items(): HasMany
    {
        return $this->hasMany(OrderItem::class, 'order_id', 'id');
    }

    /**
     * Get only product order items (excludes fees, signup fees, and other non-product items).
     * Use this in all display contexts where product line items are shown.
     *
     * @return \FluentCart\Framework\Support\Collection
     */
    public function getProductItems()
    {
        return $this->order_items()->whereNotIn('payment_type', ['fee', 'signup_fee'])->get();
    }

    /**
     * Get fee order items for this order.
     *
     * @return HasMany
     */
    public function feeItems(): HasMany
    {
        return $this->order_items()->where('payment_type', 'fee');
    }

    /**
     * Get applied fees as a simple array (for display purposes).
     *
     * @return array
     */
    public function getAppliedFees(): array
    {
        return $this->feeItems()->get()->map(function ($item) {
            $otherInfo = is_array($item->other_info) ? $item->other_info : [];
            return [
                'key'     => Arr::get($otherInfo, 'fee_key', ''),
                'label'   => $item->title,
                'amount'  => (int) $item->subtotal,
                'source'  => Arr::get($otherInfo, 'source', 'custom'),
                'item_id' => $item->id,
            ];
        })->toArray();
    }

    public function setConfigAttribute($value)
    {

        if ($value) {
            $decoded = \json_encode($value, true);
            if (!($decoded)) {
                $decoded = '[]';
            }
        } else {
            $decoded = '[]';
        }

        $this->attributes['config'] = $decoded;
    }

    public function getConfigAttribute($value)
    {
        if (!$value) {
            return [];
        }

        return \json_decode($value, true);
    }

    /**
     * Retrieves a filtered list of `order_items` based on priority rules for `payment_type`.
     *
     * The function applies the following logic in descending order of precedence:
     *
     * 1. **Priority 1: Onetime Items**
     *    - If `order_items` contain `payment_type` as `onetime`, return only those items.
     *
     * 2. **Priority 2: Subscription Items**
     *    - If there are no `onetime` items, return `subscription` items only if:
     *      - There is no `signup_fee` or `adjustment` for the same order.
     *    - This ensures `subscription` items are returned only when no other higher priority types are present.
     *
     * 3. **Priority 3: Adjustment Items**
     *    - If there are no `onetime` or `subscription` items, return `adjustment` items only if:
     *      - `subscription` items exist for the same order.
     *    - This prioritizes `adjustment` items when both `adjustment` and `subscription` are present.
     *
     * The function uses `whereExists` and `whereNotExists` subqueries to apply these priority rules.
     * - `whereExists` checks for the presence of certain `payment_type` values in the `order_items` table.
     * - `whereNotExists` ensures exclusion of specific `payment_type` values if higher priority types are present.
     *
     * @return HasMany
     *      The filtered `order_items` relationship, ordered by the specified priority rules.
     */

    public function filteredOrderItems(): HasMany
    {
        return $this->hasMany(OrderItem::class, 'order_id', 'id');
    }

    public function customer(): BelongsTo
    {
        return $this->belongsTo(Customer::class, 'customer_id', 'id');
    }

    public function orderMeta(): HasMany
    {
        return $this->hasMany(OrderMeta::class, 'order_id', 'id');
    }

    public function orderTaxRates(): HasMany
    {
        return $this->hasMany(OrderTaxRate::class, 'order_id', 'id');
    }


    public function appliedCoupons(): HasMany
    {
        return $this->hasMany(AppliedCoupon::class, 'order_id', 'id');
    }

    public function usedCoupons(): HasManyThrough
    {

        return $this->hasManyThrough(
            Coupon::class,         // Final model
            AppliedCoupon::class,  // Intermediate model
            'order_id',            // Foreign key on applied_coupons table
            'id',                  // Foreign key on coupons table
            'id',                  // Local key on orders table
            'coupon_id'            // Local key on applied_coupons table
        );
    }

    public function shipping_address(): HasOne
    {
        return $this->hasOne(OrderAddress::class, 'order_id', 'id')->where('type', 'shipping');
    }

    public function billing_address(): HasOne
    {
        return $this->hasOne(OrderAddress::class, 'order_id', 'id')->where('type', 'billing');
    }

    public function order_addresses(): HasMany
    {
        return $this->hasMany(OrderAddress::class, 'order_id', 'id');
    }

    public function licenses(): HasMany
    {
        return $this->hasMany(License::class, 'order_id', 'id');
    }

    public function scopeSearchBy($query, $search)
    {
        $search = trim($search);

        if (!$search) {
            return $query;
        }

        $searchTerms = explode(' ', $search);

        return $query->where(function (Builder $q) use ($searchTerms) {
            $q->where('id', 'LIKE', "%{$searchTerms[0]}%")
                ->orWhere('status', 'LIKE', "%{$searchTerms[0]}%")
                ->when(is_numeric($searchTerms[0]), function ($q) use ($searchTerms) {
                    $q->orWhere('total_amount', Helper::toCent($searchTerms[0]));
                })
                //->orWhere('total_amount', Helper::toCent($searchTerms[0]))
                ->orWhere('payment_status', 'LIKE', "%{$searchTerms[0]}%")
                ->orWhere('payment_method', 'LIKE', "%{$searchTerms[0]}%")
                ->orWhere('invoice_no', 'LIKE', "%{$searchTerms[0]}%")
                ->orWhereHas('order_items', function ($orderItemQuery) use ($searchTerms) {
                    $orderItemQuery->where('post_title', 'LIKE', "%{$searchTerms[0]}%")
                        ->orWhere('title', 'LIKE', "%{$searchTerms[0]}%");
                })
                ->orWhereHas('customer', function ($customerQuery) use ($searchTerms) {
                    foreach ($searchTerms as $term) {
                        $customerQuery->where(function ($q) use ($term) {
                            $q->where('email', 'LIKE', "%{$term}%")
                                ->orWhere('first_name', 'LIKE', "%{$term}%")
                                ->orWhere('last_name', 'LIKE', "%{$term}%");
                        });
                    }
                });
        });
    }

    public function scopeOfPaymentStatus($query, $status)
    {
        return $query->where('payment_status', $status);
    }

    public function scopeOfOrderStatus($query, $status)
    {
        return $query->where('status', $status);
    }

    public function scopeOfShippingStatus($query, $status)
    {
        return $query->where('shipping_status', $status);
    }

    public function scopeOfOrderType($query, $type)
    {
        return $query->where('order_type', $type);
    }

    public function scopeOfPaymentMethod($query, $methodName)
    {
        return $query->where('payment_method', $methodName);
    }

    public function scopeApplyCustomFilters($query, $filters)
    {
        $acceptedKeys = $this->fillable;
        foreach ($filters as $filterKey => $filterValues) {
            $values = Arr::get($filterValues, 'value', []);
            if (!empty($values) && $filterKey && in_array($filterKey, $acceptedKeys)) {
                $query->search([$filterKey => ["column" => $filterKey, "operator" => "in", "value" => $values]]);
            }
        }

        return $query;
    }

    public function updateStatus($key, $newStatus)
    {
        $oldStatus = $this->$key;

        if ($newStatus == $oldStatus) {
            return $this;
        }

        if ($key === 'status' && $newStatus === Status::ORDER_COMPLETED) {
            $this->completed_at = DateTime::gmtNow();
        }

        if ($key === 'payment_status' && $newStatus === Status::PAYMENT_REFUNDED) {
            $this->refunded_at = DateTime::gmtNow();
        }

        $this->$key = $newStatus;
        $this->save();

        return $this;
    }

    public function updatePaymentStatus($newStatus)
    {
        $oldStatus = $this->payment_status;

        if ($newStatus == $oldStatus) {
            return $this;
        }

        if ($newStatus === Status::PAYMENT_REFUNDED) {
            $this->refunded_at = DateTime::gmtNow();
        }

        $this->payment_status = $newStatus;
        $this->save();

//        do_action('fluent_cart/order_status_to_' . $newStatus, [
//            'order' => $this,
//            'new_status' => $newStatus,
//            'old_status' => $oldStatus
//        ]);
//        do_action('fluent_cart/order_status_updated', [
//            'order' => $this,
//            'new_status' => $newStatus,
//            'old_status' => $oldStatus
//        ]);

        return $this;
    }

    public function getMeta($metaKey, $defaultValue = false)
    {
        $meta = OrderMeta::query()->where('order_id', $this->id)
            ->where('meta_key', $metaKey)
            ->first();

        if ($meta) {
            return $meta->meta_value;
        }

        return $defaultValue;
    }

    public function updateMeta($metaKey, $value)
    {
        $meta = OrderMeta::query()->where('order_id', $this->id)
            ->where('meta_key', $metaKey)
            ->first();

        if ($meta) {
            $meta->meta_value = $value;
            $meta->save();

            return $meta;
        }

        return OrderMeta::create([
            'order_id'   => $this->id,
            //phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_key
            'meta_key'   => $metaKey,
            //phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_value
            'meta_value' => $value,
        ]);
    }

    public function deleteMeta($metaKey)
    {
        return OrderMeta::where('order_id', $this->id)
            ->where('meta_key', $metaKey)
            ->delete();
    }

    public function getBusinessInfo(): array
    {
        $businessInfo = $this->getMeta('business_info', []);

        return is_array($businessInfo) ? $businessInfo : [];
    }

    public function getPrimaryOrderTaxRate()
    {
        return $this->orderTaxRates ? $this->orderTaxRates->first() : null;
    }

    public function getReversedTaxTotal()
    {
        $this->loadMissing(['orderTaxRates']);
        $primaryRate = $this->getPrimaryOrderTaxRate();
        if (!$primaryRate) {
            return 0;
        }
        return (int) Arr::get(
            is_array($primaryRate->meta) ? $primaryRate->meta : [],
            'reverse_charge_original_tax_total',
            0
        );
    }

    public function isB2BOrder(): bool
    {
        return !empty($this->getBusinessInfo());
    }

    public function getIsB2BOrderAttribute(): bool
    {
        return $this->isB2BOrder();
    }

    public function isReverseChargeTaxOrder(): bool
    {
        $orderTaxRate = $this->getPrimaryOrderTaxRate();
        $reverseChargeApplied = Arr::get($orderTaxRate->meta ?? [], 'reverse_charge_applied', null);

        if ($reverseChargeApplied !== null) {
            return (bool) $reverseChargeApplied;
        }

        return $this->hasValidatedCustomerTaxNumber() && ((int) $this->tax_total + (int) $this->shipping_tax) === 0;
    }

    public function getOrderRcMode(): string
    {
        $this->loadMissing(['orderTaxRates']);
        $primaryRate = $this->getPrimaryOrderTaxRate();
        $stored = Arr::get((array) ($primaryRate ? $primaryRate->meta : []), 'reverse_charge_price_mode', null);
        if ($stored !== null) {
            return (string) $stored;
        }
        return (string) Arr::get(
            get_option('fluent_cart_tax_configuration_settings', []),
            'eu_vat_settings.reverse_charge_price_mode',
            'fixed'
        );
    }

    public function getDisplayTaxLines(): array
    {
        $displayTaxLines = [];
        $isReverseCharge = $this->isReverseChargeTaxOrder();

        foreach ($this->orderTaxRates ?: [] as $orderTaxRate) {
            $meta = $this->normalizeOrderTaxRateMeta((array) $orderTaxRate->meta, (int) $orderTaxRate->tax_rate_id);

            $ratePercent   = (float) Arr::get($meta, 'rate_percent', 0);
            $rateTaxAmount = (int) $orderTaxRate->order_tax;
            $taxableAmount = (int) Arr::get($meta, 'taxable_amount', 0);
            $isCompound    = (bool) Arr::get($meta, 'is_compound', false);
            $isMixedInclusive = (bool) Arr::get($meta, 'is_mixed_inclusive', false);
            $lineInclusive = Arr::get($meta, 'inclusive', null);
            $label         = trim((string) Arr::get($meta, 'label', ''));

            if ($isReverseCharge) {
                if ($ratePercent <= 0) {
                    continue;
                }
            } elseif ($rateTaxAmount <= 0) {
                continue;
            }

            $displayLabel = $label ?: __('Tax', 'fluent-cart');

            if ($ratePercent > 0) {
                $displayLabel .= ' (' . Helper::formatTaxRatePercent($ratePercent) . '%)';
            }

            if ($isCompound) {
                $displayLabel .= ' (' . __('Compound', 'fluent-cart') . ')';
            }

            // Capture clean label (name + percent, no base suffix) for the shared folded-row builder.
            $rateLabelClean = $displayLabel;

            if ($taxableAmount > 0 && !$isMixedInclusive) {
                if ($lineInclusive === null) {
                    $displayBase = $this->tax_behavior == 2
                        ? max(0, $taxableAmount - $rateTaxAmount)
                        : $taxableAmount;
                } else {
                    $displayBase = $lineInclusive
                        ? max(0, $taxableAmount - $rateTaxAmount)
                        : $taxableAmount;
                }

                $displayLabel .= ' ' . sprintf(
                    __('on %s', 'fluent-cart'),
                    html_entity_decode(Helper::toDecimal($displayBase), ENT_QUOTES, 'UTF-8')
                );
            }

            $displayTaxLines[] = [
                'label'          => $displayLabel,
                'rate_label'     => $rateLabelClean,
                'order_tax'      => $rateTaxAmount,
                'total_tax'      => (int) $orderTaxRate->total_tax,
                'rate_id'        => (int) $orderTaxRate->tax_rate_id,
                'rate_percent'   => $ratePercent,
                'taxable_amount' => isset($displayBase) ? (int) $displayBase : $taxableAmount,
                'inclusive'      => $lineInclusive === null ? ((int) $this->tax_behavior === 2) : (bool) $lineInclusive,
            ];
            unset($displayBase);
        }

        return $displayTaxLines;
    }

    public function getDisplayTaxLinesAttribute(): array
    {
        return $this->getDisplayTaxLines();
    }

    public function getDisplayShippingTaxLines(): array
    {
        $displayLines = [];
        foreach ($this->orderTaxRates ?: [] as $orderTaxRate) {
            $shippingTax = (int) $orderTaxRate->shipping_tax;
            if ($shippingTax <= 0) {
                continue;
            }
            $meta        = $this->normalizeOrderTaxRateMeta((array) $orderTaxRate->meta, (int) $orderTaxRate->tax_rate_id);
            $ratePercent = (float) Arr::get($meta, 'rate_percent', 0);
            $label       = trim((string) Arr::get($meta, 'label', ''));
            $rateName    = $label ?: __('Tax', 'fluent-cart');
            if ($ratePercent > 0) {
                $formattedRatePercent = Helper::formatTaxRatePercent($ratePercent);
                /* translators: %1$s: tax rate name e.g. "VAT", %2$s: rate percentage e.g. "19" */
                $displayLabel = sprintf(__('%1$s (%2$s%%) on shipping', 'fluent-cart'), $rateName, $formattedRatePercent);
            } else {
                /* translators: %1$s: tax rate name e.g. "VAT" */
                $displayLabel = sprintf(__('%1$s on shipping', 'fluent-cart'), $rateName);
            }
            $displayLines[] = [
                'label'        => $displayLabel,
                'shipping_tax' => $shippingTax,
                'rate_id'      => (int) $orderTaxRate->tax_rate_id,
                'rate_percent' => $ratePercent,
            ];
        }
        return $displayLines;
    }

    public function getDisplayShippingTaxLinesAttribute(): array
    {
        return $this->getDisplayShippingTaxLines();
    }

    protected function normalizeOrderTaxRateMeta(array $meta, int $taxRateId): array
    {
        if (
            array_key_exists('label', $meta) ||
            array_key_exists('rate_percent', $meta) ||
            array_key_exists('taxable_amount', $meta) ||
            array_key_exists('is_compound', $meta)
        ) {
            return $meta;
        }

        $legacyRates = (array) Arr::get($meta, 'rates', []);
        if (!$legacyRates) {
            return $meta;
        }

        $legacyRateMeta = [];

        foreach ($legacyRates as $legacyRate) {
            if ((int) Arr::get($legacyRate, 'rate_id', 0) === $taxRateId) {
                $legacyRateMeta = (array) $legacyRate;
                break;
            }
        }

        if (!$legacyRateMeta) {
            $legacyRateMeta = (array) reset($legacyRates);
        }

        if (!$legacyRateMeta) {
            return $meta;
        }

        return array_merge($meta, [
            'label'          => Arr::get($legacyRateMeta, 'label', ''),
            'rate_percent'   => (float) Arr::get($legacyRateMeta, 'rate_percent', Arr::get($legacyRateMeta, 'rate', 0)),
            'taxable_amount' => (int) Arr::get($legacyRateMeta, 'taxable_amount', 0),
            'is_compound'    => (bool) Arr::get($legacyRateMeta, 'is_compound', false),
            'inclusive'      => Arr::get($legacyRateMeta, 'inclusive', null),
            'is_mixed_inclusive' => (bool) Arr::get($legacyRateMeta, 'is_mixed_inclusive', false),
        ]);
    }

    public function getCustomerTaxNumber(): string
    {
        $businessInfoTaxNumber = (string) Arr::get($this->getBusinessInfo(), 'tax_number', '');
        if (!empty($businessInfoTaxNumber)) {
            return $businessInfoTaxNumber;
        }

        $legacyTaxNumber = (string) $this->getMeta('vat_tax_id', '');
        if (!empty($legacyTaxNumber)) {
            return $legacyTaxNumber;
        }

        $topLevelLegacyTaxId = (string) $this->getMeta('tax_id', '');
        if (!empty($topLevelLegacyTaxId)) {
            return $topLevelLegacyTaxId;
        }

        $orderTaxRate = $this->getPrimaryOrderTaxRate();

        return (string) Arr::get($orderTaxRate->meta ?? [], 'vat_reverse.vat_number', '');
    }

    public function getTaxSummaryAttribute(): array
    {
        return TaxSummaryHelper::computeTaxSummary($this);
    }

    public function getBusinessInfoAttribute(): array
    {
        $businessInfo = $this->getBusinessInfo();

        // Only meaningful for a MoR reverse-charge order (no orderTaxRate row) — omit
        // for every normal order instead of appending a redundant duplicate of total_paid.
        $morVatRemoved = $this->getMoRVatRemovedAmount();
        if ($morVatRemoved > 0) {
            $businessInfo['net_total_paid'] = $this->netAmount((int) $this->total_paid);
        }

        return $businessInfo;
    }

    public function getIsReverseChargeTaxOrderAttribute(): bool
    {
        return $this->isReverseChargeTaxOrder();
    }

    public function getCustomerTaxNumberAttribute(): string
    {
        return $this->getCustomerTaxNumber();
    }

    public function hasValidatedCustomerTaxNumber(): bool
    {
        $businessInfo = $this->getBusinessInfo();
        if (!empty($businessInfo['tax_number'])) {
            return (bool) Arr::get($businessInfo, 'tax_number_validated', false);
        }

        $orderTaxRate = $this->getPrimaryOrderTaxRate();

        return (bool) Arr::get($orderTaxRate->meta ?? [], 'vat_reverse.valid', false);
    }

    public function getCustomerTaxName(): string
    {
        $businessInfoTaxName = (string) Arr::get($this->getBusinessInfo(), 'tax_number_name', '');
        if (!empty($businessInfoTaxName)) {
            return $businessInfoTaxName;
        }

        $orderTaxRate = $this->getPrimaryOrderTaxRate();

        return (string) Arr::get($orderTaxRate->meta ?? [], 'vat_reverse.name', '');
    }

    public function getTotalPaidAmount()
    {
        return $this->transactions()->where('status', Status::TRANSACTION_SUCCEEDED)->sum('total');
    }

    /**
     * Amount of VAT removed by a merchant-of-record gateway (e.g. Paddle) for a
     * reverse-charge order that never ran the tax module (no `fct_order_tax_rate` row).
     * Display-only — `total_amount`/`total_paid`/`txn.total` stay gross for such orders
     * (cover invariant: the "fully paid" equality that drives due-amount checks, digital
     * auto-complete, and dunning reminders depends on it), so this is never subtracted
     * into the ledger, only into `getDisplayTotalPaid()` for the admin UI. Zero for
     * core-handled reverse charge (tax-rate row present) — those are already net at
     * creation time.
     */
    public function getMoRVatRemovedAmount(): int
    {
        if ($this->getPrimaryOrderTaxRate()) {
            return 0;
        }

        return (int) Arr::get($this->getBusinessInfo(), 'mor_vat_removed', 0);
    }

    /**
     * Nets a raw gross ledger figure (total_paid, a live paid-total sum, a refund amount)
     * by the MoR VAT removal — see getMoRVatRemovedAmount(). Single formula for every
     * "what did we actually collect/need to refund" comparison, so callers never
     * reimplement the subtraction themselves. Never use for due-amount, digital
     * auto-complete, or reminder logic; those must keep comparing the gross ledger
     * columns (total_amount vs total_paid) so the "fully paid" equality still holds.
     */
    public function netAmount(int $amount): int
    {
        return max(0, $amount - $this->getMoRVatRemovedAmount());
    }

    public function getTotalRefundAmount()
    {
        return $this->transactions()->where('status', Status::TRANSACTION_REFUNDED)->sum('total');
    }

    public function recountTotalPaidAndRefund()
    {
        $totalPaid = $this->getTotalPaidAmount();
        $totalRefunded = $this->getTotalRefundAmount();

        $this->total_refund = $totalRefunded;

        // Net out MoR VAT removal so a full refund of the actually captured amount
        // resolves to "fully refunded" — see netAmount().
        $netTotalPaid = $this->netAmount($totalPaid);

        if (floatval($totalRefunded) >= floatval($netTotalPaid)) {
            $this->payment_status = Status::PAYMENT_REFUNDED;
        } elseif ($totalPaid > $totalRefunded) {
            $this->payment_status = Status::PAYMENT_PARTIALLY_REFUNDED;
        }

        $this->save();

        return $this;
    }

    public function syncOrderAfterRefund($type, $refundedAmount)
    {
        $paymentStatus = $type == 'full' ? Status::PAYMENT_REFUNDED : Status::PAYMENT_PARTIALLY_REFUNDED;
        $this->total_refund += $refundedAmount;
        $this->payment_status = $paymentStatus;

        if ($paymentStatus === Status::PAYMENT_REFUNDED && !$this->refunded_at) {
            $this->refunded_at = DateTime::gmtNow();
        }

        $this->save();

        return $this;
    }

    public function updateRefundedItems($refundedItemIds, $refundedAmount)
    {
        // these are order item ids
        $totalItems = count($refundedItemIds);

        if ($totalItems === 1) {
            $orderItem = OrderItem::find($refundedItemIds[0]);
            $orderItem->refund_total += $refundedAmount;
            $orderItem->save();
            return;
        }

        if ($totalItems === 0) {
            // get all order items
            $refundedItemIds = $this->order_items->pluck('id')->toArray();
            $totalItems = count($refundedItemIds);
        }


        // Calculate remaining amount for each item
        $items = [];
        $totalRemain = 0;
        foreach ($refundedItemIds as $itemId) {
            $orderItem = OrderItem::find($itemId);
            $remain = max(0, $orderItem->line_total - $orderItem->refund_total);
            $items[] = [
                'model'  => $orderItem,
                'remain' => $remain
            ];
            $totalRemain += $remain;
        }

        if ($totalRemain == 0) {
            // nothing to refund
            return;
        }

        if ($totalRemain < $refundedAmount) {
            $refundedAmount = $totalRemain;
        }

        // Distribute refund proportionally
        $distributed = 0;
        foreach ($items as $index => $item) {
            if ($index === count($items) - 1) {
                // Assign the rest to the last item to avoid rounding issues
                $amount = $refundedAmount - $distributed;
            } else {
                $amount = round($refundedAmount * ($item['remain'] / $totalRemain), 2);
                $distributed += $amount;
            }
            $item['model']->refund_total += $amount;
            $item['model']->save();
        }
    }

    public function recountTotalPaid()
    {
        $totalPaid = $this->getTotalPaidAmount();
        $totalRefunded = $this->getTotalRefundAmount();

        $this->total_paid = ($totalPaid - $totalRefunded) < 0 ? 0 : $totalPaid - $totalRefunded;
        $this->save();
        return $this;
    }

    /**
     * Get the order's label.
     */
    public function labels(): MorphMany
    {
        return $this->morphMany(LabelRelationship::class, 'labelable');
    }

    public function getLatestTransactionAttribute()
    {
        return OrderTransaction::query()->where('order_id', $this->id)
            ->where('transaction_type', '!=', Status::TRANSACTION_TYPE_REFUND)
            ->where('status', '!=', Status::TRANSACTION_REFUNDED)
            ->orderBy('id', 'DESC')
            ->first();
    }

    public function renewals(): HasMany
    {
        return $this
            ->hasMany(Order::class, 'parent_id', 'id')
            ->where('type', 'renewal')
            ->wherenotIn('status', [
                Status::ORDER_CANCELED,
                Status::ORDER_FAILED,
                Status::ORDER_ON_HOLD
            ]);
    }

    public function isSubscription(): bool
    {
        return $this->order_items->where('payment_type', 'subscription')->count() > 0;
    }


    public function getViewUrl($type = 'customer')
    {

        if ($type === 'admin') {
            return URL::getDashboardUrl('orders/' . $this->id . '/view');
        }

        return TemplateService::getCustomerProfileUrl('order/' . $this->uuid);
    }

    public function getLatestTransaction()
    {
        return OrderTransaction::query()
            ->where('order_id', $this->id)
            ->where('transaction_type', '!=', Status::TRANSACTION_TYPE_REFUND)
            ->orderBy('id', 'DESC')
            ->first();
    }

    public function currentSubscription(): ?Subscription
    {
        return Subscription::query()
            ->where('parent_order_id', $this->id)
            ->where('status', 'active')
            ->orderBy('id', 'DESC')
            ->first();
    }

    public function getDownloads($scope = 'email'): array
    {
        if (!in_array($this->status, Status::getOrderSuccessStatuses())) {
            return [];
        }

        $order = $this->load('order_items');

        if ($order->order_items->isEmpty()) {
            return [];
        }

        $productIds = $order->order_items->pluck('post_id')->unique()->values();
        $productDownloads = ProductDownload::query()->whereIn('post_id', $productIds)->get()->keyBy('id');

        $groupedDownload = $productDownloads->groupBy('post_id');

        $downloadData = [];

        $alreadyAdded = [];

        foreach ($order->order_items as $item) {
            if (in_array($item->payment_type, ['signup_fee', 'fee'])) {
                continue;
            }

            $availableDownloads = Arr::get($groupedDownload, $item->post_id, []);

            $authorizedDownloads = [];

            foreach ($availableDownloads as $download) {

                $ids = $download->product_variation_id;

                if (in_array($download->id, $alreadyAdded)) {
                    continue;
                }
                if (!is_array($ids) || empty($ids) || in_array($item->object_id, $ids)) {
                    
                    $authorizedDownloads [] =
                        [
                            'download_url'        => Helper::generateDownloadFileLink($download, $order->id),
                            'title'               => $download->title,
                            'file_size'           => $download->file_size,
                            'formatted_file_size' => Helper::readableFileSize($download->file_size),
                        ];

                    $alreadyAdded[] = $download->id;
                }
            }

            if (!empty($authorizedDownloads)) {
                $downloadData[] = [
                    'title'           => $item->post_title . ' - ' . $item->title, // 'product name - variation title',
                    'product_id'      => $item->post_id,
                    'variation_id'    => $item->object_id,
                    'additional_html' => '',
                    'downloads'       => $authorizedDownloads
                ];
            }
        }


        return apply_filters('fluent_cart/single_order_downloads', $downloadData, [
            'order' => $order,
            'scope' => $scope
        ]);
    }

    public function getLicenses($with = ['product','productVariant'])
    {
        if (!ModuleSettings::isActive('license') || !App::isProActive()) {
            return null;
        }

        return License::query()->where('order_id', $this->id)
            ->with($with)
            ->get();
    }

    public function getDownloadsById($orderId): array
    {
        if (empty($orderId)) {
            return [];
        }

        $order = Order::query()->with('order_items')->find($orderId);

        if (empty($order)) {
            return [];
        }

        return $order->getDownloads();
    }

    public function getReceiptViewUrl()
    {
        return add_query_arg([
            'fluent-cart' => 'receipt',
            'order_hash'  => $this->uuid,
        ], home_url());
    }

    public function getReceiptDownloadUrl()
    {
        return add_query_arg(['download' => 1], $this->getReceiptViewUrl());
    }

    public function addLog($title, $description = '', $type = 'info', $by = '')
    {

        fluent_cart_add_log(
            $title,
            $description,
            $type,
            [
                'module_type' => 'FluentCart\App\Models\Order',
                'module_id'   => $this->id,
                'module_name' => 'Order',
                'created_by'  => $by
            ]
        );
    }

    public function canBeRefunded(): bool
    {
        $config = $this->config;
        $upgradeTo = Arr::get($config, 'upgraded_to', 0);
        if (!empty($upgradeTo)) {
            return false;
        }
        return true;
    }

    public function generateReceiptNumber()
    {
        if ($this->receipt_number) {
            return $this;
        }

        // Re-check from database — another process may have already generated the number
        $fresh = static::query()
            ->where('id', $this->id)
            ->select(['id', 'receipt_number', 'invoice_no'])
            ->first();

        if ($fresh && $fresh->receipt_number) {
            $this->receipt_number = $fresh->receipt_number;
            $this->invoice_no = $fresh->invoice_no;
            return $this;
        }

        // Note: if a concurrent request wins the claim below, this number goes unused
        // and creates a gap in the receipt sequence. Gaps are acceptable — correctness
        // (no duplicates) is the priority, and the primary guard in StatusHelper
        // prevents this race path from being reached in normal operation.
        $receiptNumber = OrderService::getNextReceiptNumber();
        $invoiceNo = OrderService::getInvoicePrefix() . $receiptNumber;

        // Atomic: only set receipt_number if still NULL in the database.
        // Prevents duplicate receipt numbers when concurrent requests
        // (webhook + browser confirmation) race to generate one.
        // invoice_no defaults to '' (empty string) in the schema, not NULL,
        // so we must match both NULL and '' to correctly identify unset invoices.
        $claimed = static::query()
            ->where('id', $this->id)
            ->whereNull('receipt_number')
            ->where(function ($q) {
                $q->whereNull('invoice_no')->orWhere('invoice_no', '');
            })
            ->update([
                'receipt_number' => $receiptNumber,
                'invoice_no'    => $invoiceNo,
            ]);

        if ($claimed) {
            $this->receipt_number = $receiptNumber;
            $this->invoice_no = $invoiceNo;

            do_action('fluent_cart/order/invoice_number_added', [
                'order' => $this
            ]);
        } else {
            // Another process already generated it — use theirs
            $fresh = static::query()
                ->where('id', $this->id)
                ->select(['id', 'receipt_number', 'invoice_no'])
                ->first();

            if ($fresh && $fresh->receipt_number) {
                $this->receipt_number = $fresh->receipt_number;
                $this->invoice_no = $fresh->invoice_no;
            }
        }

        return $this;
    }

    public function orderOperation(): HasOne
    {
        return $this->hasOne(OrderOperation::class, 'order_id', 'id');
    }

    public function canBeDeleted()
    {
        $canBeDeleted = true;


        if($this->mode !== Status::ORDER_MODE_TEST){
            // Only canceled or on-hold orders can be deleted
            if ($this->status === Status::ORDER_CANCELED || $this->status === Status::ORDER_ON_HOLD) {

                $isFreeOrder = ((int)$this->total_amount) === 0;
                $isPaidOrder = in_array($this->payment_status, Status::getOrderPaymentSuccessStatuses(), true);

                // Free orders OR canceled unpaid orders can be deleted
                if ($isPaidOrder && !$isFreeOrder) {
                    $canBeDeleted = new \WP_Error(
                        'order_cannot_be_deleted',
                        sprintf(
                        /* translators: 1: order/invoice number, 2: payment status */
                            __('Order %1$s cannot be deleted due to its current payment status: %2$s.', 'fluent-cart'),
                            $this->invoice_no,
                            $this->payment_status
                        )
                    );
                }

            } else {
                $canBeDeleted = new \WP_Error(
                    'order_cannot_be_deleted',
                    sprintf(
                    /* translators: 1: order/invoice number, 2: order status */
                        __('Order %1$s cannot be deleted due to its current order status: %2$s.', 'fluent-cart'),
                        $this->invoice_no,
                        $this->status
                    )
                );
            }
        }


        if (!is_wp_error($canBeDeleted) && $this->mode !== Status::ORDER_MODE_TEST) {
            // Handle subscription relationship
            $parentOrderId = $this->parent_id ? $this->parent_id : $this->id;

            $subscription = Subscription::query()
                ->where('parent_order_id', $parentOrderId)
                ->first();

            // If subscription is active, prevent deletion
            if (
                $subscription &&
                $subscription->status === Status::SUBSCRIPTION_ACTIVE &&
                $this->type === 'subscription'
            ) {
                $canBeDeleted = new \WP_Error(
                    'order_cannot_be_deleted',
                    sprintf(
                        /* translators: %s is the order/invoice number */
                        __('Order %s cannot be deleted as it has an active subscription.', 'fluent-cart'),
                        $this->invoice_no
                    )
                );
            }
        }


        return apply_filters('fluent_cart/order_can_be_deleted', $canBeDeleted, [
            'order' => $this
        ]);
    }


}