<?php

namespace MailerLite\Includes\Classes\Data;

use MailerLite\Includes\Classes\Settings\MailerLiteSettings;
use MailerLite\Includes\Classes\Settings\ShopSettings;
use MailerLite\Includes\Classes\Singleton;
use Automattic\WooCommerce\Utilities\OrderUtil;

class TrackingData extends Singleton
{
    private $wpdb;

    private $hposEnabled = false;
    public function __construct()
    {
        global $wpdb;

        $this->wpdb = $wpdb;
        if ( OrderUtil::custom_orders_table_usage_is_enabled() ) {
            $this->hposEnabled = true;
        }

    }


    /**
     * Get untracked product categories
     * woo_ml_get_untracked_categories
     * @return array
     */
    public function getUntrackedCategories()
    {

        $term_args = array(
            'taxonomy' => 'product_cat',
            'hide_empty' => false,
            'orderby' => 'none',
            'meta_key' => '_woo_ml_category_tracked',
            'meta_compare' => 'NOT EXISTS'
        );

        return get_terms($term_args);
    }

    /**
     * Get untracked products
     * woo_ml_get_untracked_products
     *
     * @param array $args
     *
     * @return array
     */
    public function getUntrackedProducts($args = array())
    {

        $defaults = array(
            'post_type' => 'product',
            'posts_per_page' => 100,
            'meta_key' => '_woo_ml_product_tracked',
            'meta_compare' => 'NOT EXISTS'
        );

        $args = wp_parse_args($args, $defaults);
        $product_posts_query = new \WP_Query($args);

        $products = [];

        if ($product_posts_query->have_posts()) {
            $products = $product_posts_query->posts;
        }

        return $products;
    }

    /**
     * Get tracked product categories count
     * woo_ml_get_tracked_categories_count
     * @return int
     */
    public function getTrackedCategoriesCount()
    {

        $term_args = array(
            'taxonomy' => 'product_cat',
            'hide_empty' => false,
            'orderby' => 'none',
            'meta_key' => '_woo_ml_category_tracked',
            'meta_compare' => 'EXISTS'
        );

        $categories = get_terms($term_args);

        return count($categories);
    }

    /**
     *
     * woo_ml_count_untracked_products_count
     * @return mixed
     */
    public function getUntrackedProductsCount()
    {
        $defaults = array(
            'post_type' => 'product',
            'posts_per_page' => 1,
            'meta_key' => '_woo_ml_product_tracked',
            'meta_compare' => 'NOT EXISTS'
        );

        $args = wp_parse_args($defaults);
        $products_query = new \WP_Query($args);

        return $products_query->found_posts;
    }

    /**
     *
     * woo_ml_get_untracked_customers_count
     * @return mixed
     */
    public function getUntrackedCustomersCount()
    {
        $customer_query = new \WP_User_Query(
            [
                'fields' => 'ID',
                'role__in' => ['customer', 'administrator'],
                'meta_query' => [
                    'relation' => 'AND',
                    [
                        'relation' => 'OR',
                        [
                            'key' => 'last_order_date',
                            'compare' => 'EXISTS',
                        ],
                        [
                            'key' => 'billing_last_name',
                            'compare' => 'EXISTS',
                        ],
                    ],
                    [
                        'key' => '_woo_ml_customer_tracked',
                        'compare' => 'NOT EXISTS'
                    ]
                ],
                'number' => 1,
            ]
        );

        return $customer_query->get_total();
    }

    /**
     *
     * woo_ml_get_tracked_products_count
     * @return int
     */
    public function getTrackedProductCount()
    {
        $defaults = array(
            'post_type' => 'product',
            'posts_per_page' => 100,
            'meta_key' => '_woo_ml_product_tracked',
            'meta_compare' => 'EXISTS'
        );

        $args = wp_parse_args($defaults);
        $product_posts_query = new \WP_Query($args);

        $product_posts = [];

        if ($product_posts_query->have_posts()) {
            $product_posts = $product_posts_query->get_posts();
        }

        return count($product_posts);
    }

    /**
     *
     * woo_ml_count_untracked_categories_count
     * @return int
     */
    public function getUntrackedCategoriesCount()
    {
        return count($this->getUntrackedCategories());
    }

    /**
     *
     * woo_ml_get_tracked_customers_count
     * @return mixed
     */
    public function getTrackedCustomersCount()
    {
        $query = "SELECT
            count(DISTINCT wcl.customer_id)
        FROM
            {$this->wpdb->prefix}wc_customer_lookup wcl
            INNER JOIN {$this->wpdb->prefix}usermeta wum ON wum.user_id = wcl.user_id
            INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos on wcos.customer_id = wcl.customer_id
            WHERE wcl.user_id IS NOT NULL
            AND wum.meta_key = '_woo_ml_customer_tracked'
            AND wcos.status IN ('wc-processing', 'wc-completed');";

        return $this->wpdb->get_var($query);
    }

    /**
     *
     * woo_ml_get_untracked_customers
     * @return array|array[]
     */
    public function getUntrackedCustomers()
    {

        $customer_query = new \WP_User_Query(
            [
                'fields' => 'ID',
                'role__in' => ['customer', 'administrator'],
                'meta_query' => [
                    'relation' => 'AND',
                    [
                        'relation' => 'OR',
                        [
                            'key' => 'last_order_date',
                            'compare' => 'EXISTS',
                        ],
                        [
                            'key' => 'billing_last_name',
                            'compare' => 'EXISTS',
                        ],
                    ],
                    [
                        'key' => '_woo_ml_customer_tracked',
                        'compare' => 'NOT EXISTS'
                    ]
                ],
                'number' => 100,
            ]
        );

        return array_map(function ($customer) {
            return [
                'id' => $customer
            ];
        }, $customer_query->get_results());
    }

    /**
     * Get settings page url
     * woo_ml_get_settings_page_url
     * @return string
     */
    public function getSettingsPageUrl()
    {
        return admin_url('admin.php?page=wc-settings&tab=integration&section=mailerlite');
    }

    /**
     * Get complete integration setup url
     * woo_ml_get_complete_integration_setup_url
     * @return string
     */
    public function getCompleteIntegrationSetupUrl()
    {
        return add_query_arg('woo_ml_action', 'setup_integration', $this->getSettingsPageUrl());
    }

    /**
     * Update ignore product list in ml_data table
     * woo_ml_update_data
     * @return mixed
     */
    public function updateData($products)
    {

        $table = $this->wpdb->prefix . 'ml_data';

        $tableCreated = get_option('ml_data_table');

        if ($tableCreated != 1) {

            MailerLiteSettings::getInstance()->createMailerDataTable();
        }

        $updateQuery = $this->wpdb->prepare("
                INSERT INTO $table (data_name, data_value) VALUES ('products', %s) ON DUPLICATE KEY UPDATE data_value = %s
                ", json_encode($products), json_encode($products));

        return $this->wpdb->query($updateQuery);
    }

    /**
     * Save ignored products to WooCommerce Integration and ml_data table
     * woo_ml_save_local_ignore_products
     */
    public function saveLocalIgnoreProducts($products)
    {

        $ignore_map = MailerLiteSettings::getInstance()->remapList($products);

        if (ShopSettings::getInstance()->updateIgnoreProductList($ignore_map) === true) {

            // save updated ignore product list to WooCommerce Integration
            $settings = get_option('woocommerce_mailerlite_settings');

            if (!isset($settings['ignore_product_list'])) {
                $settings['ignore_product_list'] = array();
            }

            $settings['ignore_product_list'] = $ignore_map;

            update_option('woocommerce_mailerlite_settings', $settings);

            //save product ignore list to ml_data
            $this->updateData($products);
        }
    }

    /**
     * Remove product from product ignore list for ml_data
     * woo_ml_remove_product_from_list
     * @return array
     */
    public function removeProductFromList($products, $remove_list)
    {

        return array_filter($products, function ($k) use ($remove_list) {
            return !in_array($k, $remove_list);
        }, ARRAY_FILTER_USE_KEY);
    }

    /**
     *
     * woo_ml_get_customers_count
     * @return mixed
     */
    public function getCustomersCount()
    {

        $query = "SELECT
            sum(
                CASE WHEN customer_id = 1 THEN 1 ELSE 1 END
                ) as count
        FROM (
            SELECT
                count(DISTINCT wcl.customer_id) AS customer_id
            FROM
                {$this->wpdb->prefix}wc_customer_lookup wcl
                INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos ON wcos.customer_id = wcl.customer_id
            WHERE
                wcos.status IN('wc-processing', 'wc-completed')
            GROUP BY
                email) AS allCusotmers";

        return $this->wpdb->get_var($query);
    }

    /**
     *
     * woo_ml_get_all_customers_count
     * @return int
     * @throws \Exception
     */
    public function getAllCustomersCount()
    {

        $query = "SELECT
                count(DISTINCT wcl.email)
            FROM
                {$this->wpdb->prefix}wc_customer_lookup wcl
            INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos on wcos.customer_id = wcl.customer_id
            WHERE wcos.status IN ('wc-processing', 'wc-completed');";
        return $this->wpdb->get_var($query);
    }

    /**
     *
     * woo_ml_get_all_customers
     *
     * @param $page
     *
     * @return array
     * @throws \Exception
     */
    public function getAllCustomers($page = 1)
    {
        $data_store = \WC_Data_Store::load('report-customers');

        $customers = $data_store->get_data([
            'per_page' => 100,
            'page' => $page,
            'order_before' => null,
            'order_after' => null,
        ]);

        if (isset($customers->pages)) {

            if ($customers->pages >= $page) {

                WC()->session->set('untracked_customer_page', $page + 1);
            } else {

                return [];
            }
        }

        return $customers->data ?? [];
    }

    public function getRegisteredCustomersToSync($limit = 100)
    {

        if($this->hposEnabled) {
            return $this->getRegisteredCustomersToSyncForHpos($limit);
        }
        $query = "SELECT
                            max(user_id) AS user_id,
                            min(resource_id) AS resource_id,
                            email,
                            CASE
                            WHEN (SELECT wpm.meta_value
                                FROM {$this->wpdb->prefix}postmeta wpm
                                WHERE wpm.meta_key = '_woo_ml_subscribe'
                                AND wpm.post_id = max(allData.last_order_id)
                                LIMIT 1) THEN TRUE ELSE FALSE END
                            AS create_subscriber,
                            sum(orders_count) AS orders_count,
                            sum(total_spent) AS total_spent,
                            max(name) AS name,
                            max(last_name) AS last_name,
                            max(company) AS company,
                            max(city) AS city,
                            max(state) AS state,
                            max(country) AS country,
                            max(phone) AS phone,
                            max(postcode) AS postcode,
                            max(last_order_id) AS last_order_id,
                            max(last_order) AS last_order
                        FROM (
                            SELECT
                                wcl.user_id AS user_id,
                                wcos.customer_id AS resource_id,
                                wcl.email,
                                count(DISTINCT (wcos.order_id)) AS orders_count,
                                sum(DISTINCT (wcos.net_total)) AS total_spent,
                                wcl.first_name AS name,
                                wcl.last_name AS last_name,
                                min(
                                    CASE WHEN wpm.meta_key = '_billing_company' THEN
                                        wpm.meta_value
                                    END) AS company,
                                wcl.city AS city,
                                wcl.state AS state,
                                wcl.country AS country,
                                min(
                                    CASE WHEN wpm.meta_key = '_billing_phone' THEN
                                        wpm.meta_value
                                    END) AS phone,
                                wcl.postcode AS postcode,
                                max(wcos.order_id) AS last_order_id,
                                max(wcos.date_created) AS last_order
                            FROM
                                {$this->wpdb->prefix}postmeta AS wpm
                                INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos ON wcos.order_id = wpm.post_id
                                INNER JOIN {$this->wpdb->prefix}wc_customer_lookup wcl ON wcl.customer_id = wcos.customer_id
                                LEFT JOIN {$this->wpdb->prefix}usermeta wum ON wum.user_id = wcl.user_id
                                    AND wum.meta_key = '_woo_ml_customer_tracked'
                            WHERE
                                wcos.status IN('wc-processing', 'wc-completed')
                                AND wcl.user_id IS NOT NULL
                                AND wum.user_id IS NULL
                            GROUP BY
                                wcos.customer_id
                            ORDER BY max(wpm.post_id)
                            LIMIT {$limit}) allData
                        GROUP BY
                            allData.email
                        ORDER BY
                            resource_id;";

        return $this->wpdb->get_results($query, 'ARRAY_A');
    }

    public function getGuestCustomersToSync($lastTrackedGuest = 0,  $limit = 100)
    {
        if($this->hposEnabled) {
            return $this->getGuestCustomersToSyncForHpos($lastTrackedGuest, $limit);
        }
        $query = "SELECT
                max(user_id) as user_id,
                min(resource_id) AS resource_id,
                email,
                CASE
                    WHEN (SELECT wpm.meta_value
                        FROM {$this->wpdb->prefix}postmeta wpm
                        WHERE wpm.meta_key = '_woo_ml_subscribe'
                        AND wpm.post_id = max(allData.last_order_id)
                        LIMIT 1) THEN TRUE ELSE FALSE END
                    AS create_subscriber,
                sum(orders_count) AS orders_count,
                sum(total_spent) AS total_spent,
                max(name) AS name,
                max(last_name) AS last_name,
                max(company) AS company,
                max(city) AS city,
                max(state) AS state,
                max(country) AS country,
                max(phone) AS phone,
                max(postcode) AS postcode,
                max(last_order_id) AS last_order_id,
                max(last_order) AS last_order
            FROM (
                SELECT
                    wcl.user_id as user_id,
                    wcos.customer_id AS resource_id,
                    wcl.email,
                    count(DISTINCT (wcos.order_id)) AS orders_count,
                    sum(DISTINCT (wcos.net_total)) AS total_spent,
                    wcl.first_name AS name,
                    wcl.last_name AS last_name,
                    min(
                        CASE WHEN wpm.meta_key = '_billing_company' THEN
                            wpm.meta_value
                        END) AS company,
                    wcl.city AS city,
                    wcl.state AS state,
                    wcl.country AS country,
                    min(
                        CASE WHEN wpm.meta_key = '_billing_phone' THEN
                            wpm.meta_value
                        END) AS phone,
                    wcl.postcode AS postcode,
                    max(wcos.order_id) AS last_order_id,
                    max(wcos.date_created) AS last_order
                FROM
                    {$this->wpdb->prefix}postmeta AS wpm
                    INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos ON wcos.order_id = wpm.post_id
                    INNER JOIN {$this->wpdb->prefix}wc_customer_lookup wcl ON wcl.customer_id = wcos.customer_id
                WHERE
                    wcos.status IN('wc-processing', 'wc-completed')
                    AND wcl.customer_id > {$lastTrackedGuest}
                GROUP BY
                    wcos.customer_id,
                    email
                ORDER BY max(wpm.post_id)
                LIMIT {$limit}) allData
            GROUP BY
                allData.email
                HAVING user_id IS NULL
            ORDER BY
                resource_id;";

        return $this->wpdb->get_results($query, 'ARRAY_A');
    }

    public function getTrackedGuestCustomersCount()
    {
        $lastTrackedGuest = get_option('woo_ml_last_synced_guest_id', 0);
        if($this->hposEnabled) {
            return $this->getTrackedGuestCustomersCountForHpos($lastTrackedGuest);
        }
        $query = "SELECT
                count(email)
            FROM (
                SELECT
                    email,
                    max(user_id) AS user_id
                FROM (
                    SELECT
                        wcl.user_id AS user_id,
                        max(
                            CASE WHEN wpm.meta_key = '_billing_email'
                                AND wpm.meta_value != '' THEN
                                wpm.meta_value
                            ELSE
                                wcl.email
                            END) AS email
                    FROM
                        {$this->wpdb->prefix}postmeta AS wpm
                        INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos ON wcos.order_id = wpm.post_id
                        INNER JOIN {$this->wpdb->prefix}wc_customer_lookup wcl ON wcl.customer_id = wcos.customer_id
                    WHERE
                        wcos.status IN('wc-processing', 'wc-completed')
                        AND wcl.customer_id <= {$lastTrackedGuest}
                    GROUP BY
                        wcos.customer_id
                    ORDER BY
                        NULL) allData
            GROUP BY
                email) a
            WHERE
                user_id IS NULL";

        return $this->wpdb->get_var($query);
    }

    public function getRegisteredCustomersToSyncForHpos($limit = 100)
    {
        $query = "SELECT
                max(user_id) AS user_id,
                min(resource_id) AS resource_id,
                email,
                CASE WHEN (
                    SELECT
                        wca.meta_value
                    FROM
                        {$this->wpdb->prefix}wc_orders_meta wca
                    WHERE
                        wca.meta_key = '_woo_ml_subscribe'
                        AND wca.order_id = max(allData.last_order_id)
                    LIMIT 1) THEN
                    TRUE
                ELSE
                    FALSE
                END AS create_subscriber,
                sum(orders_count) AS orders_count,
                sum(total_spent) AS total_spent,
                max(name) AS name,
                max(last_name) AS last_name,
                max(company) AS company,
                max(city) AS city,
                max(state) AS state,
                max(country) AS country,
                max(phone) AS phone,
                max(postcode) AS postcode,
                max(last_order_id) AS last_order_id,
                max(last_order) AS last_order
            FROM (
                SELECT
                    wcl.user_id AS user_id,
                    wcos.customer_id AS resource_id,
                    wcl.email,
                    count(DISTINCT (wcos.order_id)) AS orders_count,
                    sum(DISTINCT (wcos.net_total)) AS total_spent,
                    wcl.first_name AS name,
                    wcl.last_name AS last_name,
                    min(wca.company) AS company,
                    wcl.city AS city,
                    wcl.state AS state,
                    wcl.country AS country,
                    min(wca.phone) AS phone,
                    wcl.postcode AS postcode,
                    max(wcos.order_id) AS last_order_id,
                    max(wcos.date_created) AS last_order
                FROM
                    {$this->wpdb->prefix}wc_orders_meta AS wpm
                    INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos ON wcos.order_id = wpm.order_id
                    INNER JOIN {$this->wpdb->prefix}wc_customer_lookup wcl ON wcl.customer_id = wcos.customer_id
                    INNER JOIN {$this->wpdb->prefix}wc_order_addresses wca ON wca.order_id = wpm.order_id
                    LEFT JOIN {$this->wpdb->prefix}usermeta wum ON wum.user_id = wcl.user_id
                        AND wum.meta_key = '_woo_ml_customer_tracked'
                WHERE
                    wcos.status IN('wc-processing', 'wc-completed')
                    AND wcl.user_id IS NOT NULL
                    AND wum.user_id IS NULL
                    AND wca.address_type = 'billing'
                GROUP BY
                    wcos.customer_id
                ORDER BY
                    max(wpm.order_id)
                LIMIT {$limit}) allData
            GROUP BY
                allData.email
            ORDER BY
                resource_id;";
        return $this->wpdb->get_results($query, 'ARRAY_A');
    }

    public function getGuestCustomersToSyncForHpos($lastTrackedGuest = 0, $limit = 100)
    {
        $query = "SELECT
                max(user_id) as user_id,
                min(resource_id) AS resource_id,
                email,
                CASE WHEN (
                    SELECT
                        wca.meta_value
                    FROM
                        {$this->wpdb->prefix}wc_orders_meta wca
                    WHERE
                        wca.meta_key = '_woo_ml_subscribe'
                        AND wca.order_id = max(allData.last_order_id)
                    LIMIT 1) THEN
                    TRUE
                ELSE
                    FALSE
                END AS create_subscriber,
                sum(orders_count) AS orders_count,
                sum(total_spent) AS total_spent,
                max(name) AS name,
                max(last_name) AS last_name,
                max(company) AS company,
                max(city) AS city,
                max(state) AS state,
                max(country) AS country,
                max(phone) AS phone,
                max(postcode) AS postcode,
                max(last_order_id) AS last_order_id,
                max(last_order) AS last_order
            FROM (
                SELECT
                    wcl.user_id AS user_id,
                    wcos.customer_id AS resource_id,
                    wcl.email,
                    count(DISTINCT (wcos.order_id)) AS orders_count,
                    sum(DISTINCT (wcos.net_total)) AS total_spent,
                    wcl.first_name AS name,
                    wcl.last_name AS last_name,
                    min(wca.company) AS company,
                    wcl.city AS city,
                    wcl.state AS state,
                    wcl.country AS country,
                    min(wca.phone) AS phone,
                    wcl.postcode AS postcode,
                    max(wcos.order_id) AS last_order_id,
                    max(wcos.date_created) AS last_order
               FROM
                    {$this->wpdb->prefix}wc_orders_meta AS wpm
                    INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos ON wcos.order_id = wpm.order_id
                    INNER JOIN {$this->wpdb->prefix}wc_customer_lookup wcl ON wcl.customer_id = wcos.customer_id
                    INNER JOIN {$this->wpdb->prefix}wc_order_addresses wca ON wca.order_id = wpm.order_id
                WHERE
                    wcos.status IN('wc-processing', 'wc-completed')
                    AND wcl.customer_id > {$lastTrackedGuest}
                    AND wca.address_type = 'billing'
                GROUP BY
                    wcos.customer_id,
                    email
                ORDER BY max(wpm.order_id)
                LIMIT {$limit}) allData
            GROUP BY
                allData.email
                HAVING user_id IS NULL
            ORDER BY
                resource_id;";

        return $this->wpdb->get_results($query, 'ARRAY_A');
    }

    public function getTrackedGuestCustomersCountForHpos($lastTrackedGuest)
    {
        $query = "SELECT
            count(email)
            FROM (
                SELECT
                    email,
                    max(user_id) AS user_id
                FROM (
                    SELECT
                        wcl.user_id AS user_id,
                        max(wca.email) AS email
                    FROM
                        {$this->wpdb->prefix}wc_orders_meta AS wpm
                        INNER JOIN {$this->wpdb->prefix}wc_order_addresses wca ON wca.order_id = wpm.order_id
                        INNER JOIN {$this->wpdb->prefix}wc_order_stats wcos ON wcos.order_id = wpm.order_id
                        INNER JOIN {$this->wpdb->prefix}wc_customer_lookup wcl ON wcl.customer_id = wcos.customer_id
                    WHERE
                        wcos.status IN('wc-processing', 'wc-completed')
                        AND wcl.customer_id <= {$lastTrackedGuest}
                        AND wca.address_type = 'billing'
                    GROUP BY
                        wcos.customer_id
                    ORDER BY
                        NULL) allData
                GROUP BY
                    email) a
            WHERE
                user_id IS NULL;";
        return $this->wpdb->get_var($query);
    }
}