<?php

declare(strict_types=1);

namespace Sarcio\WordPress\Admin;

use Sarcio\WordPress\Assistant\Journal;
use Sarcio\WordPress\Assistant\JournalAbilities;
use Sarcio\WordPress\Assistant\Report;
use Sarcio\WordPress\Assistant\Requests;
use Sarcio\WordPress\Assistant\Scheduled;
use Sarcio\WordPress\Assistant\UpdateAbilities;
use Sarcio\WordPress\Brand;
use Sarcio\WordPress\Embed;
use Sarcio\WordPress\InboxSummary;
use Sarcio\WordPress\KeptFixes;
use Sarcio\WordPress\Options;
use Sarcio\WordPress\Recognised;

/**
 * Three dashboard widgets: what needs a person (the inbox and requests, as
 * tiles), what visitors hit (Sarcio noticed), and what the assistant can do
 * on this site in particular (the plugins it recognises, recent and
 * scheduled changes, last month's report).
 */
final class DashboardWidget
{
    public const ID = 'sarcio_inbox';
    public const ID_ASSISTANT = 'sarcio_assistant';
    public const ID_NOTICED = 'sarcio_noticed';

    public function register(): void
    {
        add_action('wp_dashboard_setup', [$this, 'add']);
        add_action('admin_enqueue_scripts', [$this, 'enqueue']);
    }

    public function add(): void
    {
        if (!current_user_can(ReviewPage::CAPABILITY)) {
            return;
        }
        wp_add_dashboard_widget(self::ID, esc_html(Brand::name()), [$this, 'render']);
        if (!self::connected()) {
            return;
        }
        wp_add_dashboard_widget(self::ID_NOTICED, esc_html(sprintf(
            /* translators: %s: the brand name. */
            __('%s noticed', 'sarcio'),
            Brand::name(),
        )), [$this, 'renderNoticed']);
        wp_add_dashboard_widget(self::ID_ASSISTANT, esc_html__('Change your site by asking', 'sarcio'), [$this, 'renderAssistant']);
    }

    public function enqueue(string $hook): void
    {
        if ($hook !== 'index.php') {
            return;
        }
        $color = sanitize_hex_color(Brand::color());
        $color = is_string($color) && $color !== '' ? $color : Brand::DEFAULT_COLOR;
        wp_add_inline_style('dashboard', implode('', [
            '.sarcio-tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin:0 0 12px}',
            '.sarcio-tile{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid #dcdcde;border-radius:8px;background:#f6f7f7;text-decoration:none;color:#1d2327}',
            '.sarcio-tile:hover{border-color:' . $color . ';background:#fff}',
            '.sarcio-tile .dashicons{font-size:24px;width:24px;height:24px;color:' . $color . '}',
            '.sarcio-tile.is-hot .dashicons{color:#d63638}',
            '.sarcio-tile.is-warm .dashicons{color:#dba617}',
            '.sarcio-tile strong{display:block;font-size:20px;line-height:1.1}',
            '.sarcio-tile span{color:#50575e;font-size:12px}',
            '.sarcio-signals{margin:0}',
            '.sarcio-signal{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-top:1px solid #f0f0f1}',
            '.sarcio-signal:first-child{border-top:0}',
            '.sarcio-signal .dashicons{color:#d63638;flex:none;margin-top:1px}',
            '.sarcio-signal.is-reported .dashicons{color:' . $color . '}',
            '.sarcio-signal code{display:block;font-size:12px;background:none;padding:0;word-break:break-all}',
            '.sarcio-signal small{color:#50575e}',
            '.sarcio-recognised{margin:0;padding:0;list-style:none}',
            '.sarcio-recognised li{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-top:1px solid #f0f0f1}',
            '.sarcio-recognised li:first-child{border-top:0}',
            '.sarcio-recognised .dashicons{color:' . $color . ';flex:none}',
            '.sarcio-recognised strong{display:block}',
            '.sarcio-recognised span{color:#50575e;font-size:12px}',
            '.sarcio-recognised a.sarcio-try{display:inline-block;margin-top:2px;font-size:12px}',
            '.sarcio-recent{margin:8px 0 0;padding:0;list-style:none;font-size:12px;color:#50575e}',
            '.sarcio-recent li{margin:0 0 4px;display:flex;gap:6px;align-items:baseline}',
            '.sarcio-recent .dashicons{font-size:14px;width:14px;height:14px;color:' . $color . '}',
            '.sarcio-widget-foot{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:12px 0 0}',
            '.sarcio-widget-foot .description{margin:0;flex:1 1 100%}',
            '.sarcio-nudge{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-left:4px solid ' . $color . ';background:#f6f7f7;margin:0 0 10px}',
            '.sarcio-nudge .dashicons{color:' . $color . ';flex:none}',
            '.sarcio-nudge p{margin:0}',
            '.sarcio-stat-row{display:flex;gap:16px;margin:0 0 10px;flex-wrap:wrap}',
            '.sarcio-stat-row div{min-width:70px}',
            '.sarcio-stat-row strong{display:block;font-size:22px;line-height:1.1;color:' . $color . '}',
            '.sarcio-stat-row span{font-size:12px;color:#50575e}',
        ]));
    }

    private static function connected(): bool
    {
        return (string) Options::get('site_key') !== '' && (string) Options::get('sidecar_key') !== '';
    }

    private static function page(string $slug): string
    {
        return admin_url('admin.php?page=' . $slug);
    }

    private static function assistantUrl(string $prompt = ''): string
    {
        return self::page(AssistantPage::SLUG) . ($prompt !== '' ? '&ask=' . rawurlencode($prompt) : '');
    }

    private static function tile(string $url, string $icon, int $count, string $label, string $heat = ''): void
    {
        printf(
            '<a class="sarcio-tile%s" href="%s"><span class="dashicons %s" aria-hidden="true"></span><div><strong>%d</strong><span>%s</span></div></a>',
            $count > 0 && $heat !== '' ? ' is-' . esc_attr($heat) : '',
            esc_url($url),
            esc_attr($icon),
            (int) $count,
            esc_html($label),
        );
    }

    public function render(): void
    {
        if (!self::connected()) {
            echo '<div class="sarcio-nudge"><span class="dashicons dashicons-admin-site-alt3" aria-hidden="true"></span><p>' . esc_html__('Change your site by asking, let visitors report bugs, and approve fixes right here. Two minutes to connect.', 'sarcio') . '</p></div>';
            printf('<p><a class="button button-primary" href="%s">%s</a></p>', esc_url(self::page(ReviewPage::SLUG)), esc_html__('Set up Sarcio', 'sarcio'));
            return;
        }

        $summary = InboxSummary::get();
        $kept = count(array_filter(KeptFixes::all(), static fn ($fix): bool => is_array($fix) && !empty($fix['enabled'])));
        $requests = Requests::pendingCount();

        if ($summary === null) {
            echo '<p>' . esc_html__('Sarcio could not be reached just now; the counts below are from this site only.', 'sarcio') . '</p>';
            $summary = ['awaitingSecondApproval' => 0, 'live' => 0, 'needsReview' => 0, 'noticed' => 0, 'triaging' => 0];
        }
        echo '<div class="sarcio-tiles">';
        self::tile(self::page(ReviewPage::SLUG), 'dashicons-yes-alt', (int) $summary['needsReview'], __('Fixes ready to check', 'sarcio'), 'hot');
        self::tile(self::page(ReviewPage::SLUG), 'dashicons-groups', (int) $summary['awaitingSecondApproval'], __('Waiting for a second approval', 'sarcio'), 'warm');
        self::tile(self::page(RequestsPage::SLUG), 'dashicons-format-chat', $requests, __('Requests to apply', 'sarcio'), 'warm');
        self::tile(self::page(ReviewPage::SLUG), 'dashicons-search', (int) $summary['triaging'], __('Reports being looked at', 'sarcio'));
        self::tile(self::page(ReviewPage::LIVE_SLUG), 'dashicons-controls-play', (int) $summary['live'], __('Fixes live right now', 'sarcio'));
        self::tile(self::page(KeptFixesPage::SLUG), 'dashicons-lock', $kept, __('Fixes kept on this site', 'sarcio'));
        echo '</div>';
        if ((int) $summary['needsReview'] + (int) $summary['awaitingSecondApproval'] + $requests === 0) {
            echo '<p class="description">' . esc_html__('All caught up. Nothing is waiting for you.', 'sarcio') . '</p>';
        }
        echo '<div class="sarcio-widget-foot">';
        printf('<a class="button button-primary" href="%s">%s</a>', esc_url(self::page(ReviewPage::SLUG)), esc_html__('Open the Inbox', 'sarcio'));
        printf('<a class="button" href="%s">%s</a>', esc_url(self::assistantUrl()), esc_html__('Ask the assistant', 'sarcio'));
        echo '</div>';
    }

    public function renderNoticed(): void
    {
        $summary = InboxSummary::get();
        $workspace = Embed::workspaceUrl() ?? 'https://www.sarcio.io/app/';
        if ($summary === null) {
            echo '<p>' . esc_html__('Sarcio could not be reached just now.', 'sarcio') . '</p>';
            return;
        }
        if (!$summary['noticeEnabled']) {
            echo '<div class="sarcio-nudge"><span class="dashicons dashicons-visibility" aria-hidden="true"></span><p>' . esc_html__('Sarcio can watch for what fails on your visitors’ pages (an error, a broken request) and open a report with a fix drafted when several of them hit the same thing, before anyone reports it. It is off for this site.', 'sarcio') . '</p></div>';
            printf('<p><a class="button" href="%s" target="_blank" rel="noopener">%s</a></p>', esc_url($workspace), esc_html__('Turn on Sarcio noticed', 'sarcio'));
            return;
        }
        echo '<div class="sarcio-stat-row">';
        printf('<div><strong>%d</strong><span>%s</span></div>', (int) $summary['noticed'], esc_html__('reports opened by Sarcio, last 7 days', 'sarcio'));
        printf('<div><strong>%d</strong><span>%s</span></div>', count($summary['signals']), esc_html__('failures seen by visitors', 'sarcio'));
        echo '</div>';
        if ($summary['signals'] === []) {
            echo '<p class="description">' . esc_html__('Nothing failed for your visitors this week.', 'sarcio') . '</p>';
            return;
        }
        echo '<div class="sarcio-signals">';
        foreach ($summary['signals'] as $signal) {
            $where = $signal['kind'] === 'request'
                ? trim(($signal['method'] ?? '') . ' ' . $signal['sample'] . ($signal['status'] !== null ? ' → ' . $signal['status'] : ''))
                : $signal['sample'];
            printf(
                '<div class="sarcio-signal%s"><span class="dashicons %s" aria-hidden="true"></span><div><code>%s</code><small>%s</small></div></div>',
                $signal['reported'] ? ' is-reported' : '',
                $signal['kind'] === 'request' ? 'dashicons-warning' : 'dashicons-editor-code',
                esc_html($where),
                esc_html(sprintf(
                    /* translators: 1: the page path, 2: how many visitors, 3: "reported" or "watching". */
                    _n('on %1$s · %2$d visitor · %3$s', 'on %1$s · %2$d visitors · %3$s', $signal['count'], 'sarcio'),
                    $signal['urlPath'],
                    $signal['count'],
                    $signal['reported'] ? __('a report is open', 'sarcio') : __('watching', 'sarcio'),
                )),
            );
        }
        echo '</div>';
        printf('<p class="sarcio-widget-foot"><a class="button" href="%s">%s</a></p>', esc_url(self::page(ReviewPage::SLUG)), esc_html__('See the reports', 'sarcio'));
    }

    public function renderAssistant(): void
    {
        $recognised = Recognised::all();
        $bridged = Recognised::bridged();
        $updates = current_user_can('update_plugins') ? count(UpdateAbilities::pendingPlugins()) : 0;
        $pending = array_values(array_filter(Scheduled::list(), static fn (array $schedule): bool => $schedule['status'] === 'pending'));
        $recent = array_slice(array_values(array_filter(Journal::recent(), static fn (array $entry): bool => $entry['ability'] !== 'sarcio/changes-undo' && JournalAbilities::visible($entry))), 0, 3);

        echo '<ul class="sarcio-recognised">';
        foreach ($recognised as $plugin) {
            printf(
                '<li><span class="dashicons %s" aria-hidden="true"></span><div><strong>%s</strong><span>%s</span><br><a class="sarcio-try" href="%s">%s</a></div></li>',
                esc_attr($plugin['icon']),
                esc_html($plugin['name']),
                esc_html($plugin['text']),
                esc_url(self::assistantUrl($plugin['prompt'])),
                esc_html(sprintf(
                    /* translators: %s: an example request. */
                    __('Try: “%s”', 'sarcio'),
                    $plugin['prompt'],
                )),
            );
        }
        if ($updates > 0) {
            printf(
                '<li><span class="dashicons dashicons-update" aria-hidden="true"></span><div><strong>%s</strong><span>%s</span><br><a class="sarcio-try" href="%s">%s</a></div></li>',
                esc_html(sprintf(
                    /* translators: %d: how many plugins. */
                    _n('%d plugin update waiting', '%d plugin updates waiting', $updates, 'sarcio'),
                    $updates,
                )),
                esc_html__('The assistant updates them one at a time, and can put a WordPress.org plugin back to the version it had.', 'sarcio'),
                esc_url(self::assistantUrl(__('What needs updating?', 'sarcio'))),
                esc_html__('Try: “What needs updating?”', 'sarcio'),
            );
        }
        if ($bridged !== []) {
            $names = array_slice(array_keys($bridged), 0, 4);
            printf(
                '<li><span class="dashicons dashicons-admin-plugins" aria-hidden="true"></span><div><strong>%s</strong><span>%s</span></div></li>',
                esc_html(sprintf(
                    /* translators: %d: how many plugins. */
                    _n('%d other plugin the assistant can work', '%d other plugins the assistant can work', count($bridged), 'sarcio'),
                    count($bridged),
                )),
                esc_html(sprintf(
                    /* translators: %s: plugin names. */
                    __('They offer their own abilities: %s. Ask for what they do.', 'sarcio'),
                    implode(', ', $names),
                )),
            );
        }
        if ($recognised === [] && $bridged === [] && $updates === 0) {
            echo '<li><span class="dashicons dashicons-edit-page" aria-hidden="true"></span><div><strong>' . esc_html__('Pages, posts, menus, settings, images', 'sarcio') . '</strong><span>' . esc_html__('Ask for the change in plain words. You see it first; it goes live when you say so, and undo is one click.', 'sarcio') . '</span><br><a class="sarcio-try" href="' . esc_url(self::assistantUrl(__('Change the footer phone number to…', 'sarcio'))) . '">' . esc_html__('Try: “Change the footer phone number to…”', 'sarcio') . '</a></div></li>';
        }
        echo '</ul>';

        if ($pending !== []) {
            echo '<ul class="sarcio-recent">';
            foreach (array_slice($pending, 0, 2) as $schedule) {
                printf(
                    '<li><span class="dashicons dashicons-clock" aria-hidden="true"></span><span>%s</span></li>',
                    esc_html(sprintf(
                        /* translators: 1: how many changes, 2: the date and time. */
                        _n('%1$d change goes live %2$s', '%1$d changes go live %2$s', count($schedule['changes']), 'sarcio'),
                        count($schedule['changes']),
                        str_replace('T', ' ', (string) $schedule['applyAt']),
                    )),
                );
            }
            echo '</ul>';
        }
        if ($recent !== []) {
            echo '<ul class="sarcio-recent">';
            foreach ($recent as $entry) {
                printf(
                    '<li><span class="dashicons %s" aria-hidden="true"></span><span>%s%s</span></li>',
                    $entry['undoneAt'] !== null ? 'dashicons-undo' : 'dashicons-yes',
                    esc_html($entry['summary']),
                    $entry['undoneAt'] !== null ? ' ' . esc_html__('(undone)', 'sarcio') : '',
                );
            }
            echo '</ul>';
        }
        $report = Report::build(Report::previousMonth());
        echo '<div class="sarcio-widget-foot">';
        printf('<a class="button button-primary" href="%s">%s</a>', esc_url(self::assistantUrl()), esc_html__('Ask the assistant', 'sarcio'));
        printf('<a class="button" href="%s">%s</a>', esc_url(self::page(ReportPage::SLUG)), esc_html__('Monthly report', 'sarcio'));
        if ($report['counts']['changes'] + $report['counts']['kept'] > 0) {
            printf('<p class="description">%s</p>', esc_html(sprintf(
                /* translators: 1: the month, 2: changes, 3: kept fixes. */
                __('%1$s: %2$d changes made by asking, %3$d fixes kept.', 'sarcio'),
                $report['label'],
                $report['counts']['changes'],
                $report['counts']['kept'],
            )));
        }
        echo '</div>';
    }
}