@import '../../styles/skeleton';

/*
 * Host pages do not load the design system foundation stylesheet (only the form inside the
 * iframe does), so the values here are self-contained. The spinner accent follows the same
 * --givewp-primary-color the launcher buttons use.
 */
.givewp-embed-frame {
    position: relative;

    &[data-state='loading'],
    &[data-state='slow'] {
        min-height: 20rem;
    }

    &__loading {
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    &__spinner {
        width: 2.5rem;
        height: 2.5rem;
        border-radius: 50%;
        border: 3px solid rgba(0, 0, 0, 0.12);
        border-top-color: var(--givewp-primary-color, rgba(0, 0, 0, 0.55));
        animation: givewp-embed-frame-spin 0.8s linear infinite;
    }

    /*
     * A skeleton sits in normal flow and sets the frame's height itself; the spinner keeps the
     * absolute, centered layout above.
     */
    &[data-placeholder='skeleton'] &__loading {
        position: static;
        display: block;
        /* The skeleton's container queries resolve against this box, the same width as the iframe. */
        container-type: inline-size;
    }

    &__iframe {
        width: 1px;
        min-width: 100%;
        border: 0;
        visibility: hidden;
        opacity: 0;
        transition: opacity 0.2s ease;
    }

    /* Until the handshake the iframe's default height must not add to the placeholder's. */
    &[data-state='loading'] &__iframe,
    &[data-state='slow'] &__iframe {
        position: absolute;
        top: 0;
        left: 0;
    }

    &[data-state='ready'] &__iframe {
        visibility: visible;
        opacity: 1;
    }

    /*
     * Overlays the placeholder rather than sitting under it: a skeleton can be taller than the
     * viewport, so anything below it lands below the fold where nobody scrolls to it.
     */
    &__fallback {
        position: absolute;
        z-index: 1;
        margin: 0;
        text-align: center;
        animation: givewp-embed-frame-fade-in 0.3s ease;

        /* The donate-button stylesheet styles the link as a pill, so give it its own centered line. */
        a {
            display: block;
            width: fit-content;
            margin: 0.75rem auto 0;
        }
    }

    /* The spinner is short and centered, so the message fits along the bottom of the frame. */
    &[data-placeholder='spinner'] &__fallback {
        inset: auto 0 1rem;
    }

    /* Over a skeleton the message becomes a card at the top edge, where the viewer already is. */
    &[data-placeholder='skeleton'] &__fallback {
        top: 1rem;
        left: 50%;
        box-sizing: border-box;
        /* With `left: 50%` the shrink-to-fit space is half the frame, so size to the text and let
           the cap do the wrapping. */
        width: max-content;
        max-width: min(28rem, calc(100% - 2rem));
        padding: 1rem 1.5rem;
        background-color: #fff;
        border: 1px solid rgba(0, 0, 0, 0.08);
        border-radius: 0.5rem;
        box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.15);
        transform: translateX(-50%);
    }
}

@keyframes givewp-embed-frame-spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes givewp-embed-frame-fade-in {
    from {
        opacity: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .givewp-embed-frame__iframe {
        transition: none;
    }

    .givewp-embed-frame__spinner,
    .givewp-embed-frame__fallback {
        animation: none;
    }
}