<?php
/**
 * 影院（v9，MovieLog 同款独立管理）：所在地方 / 名称 / 详细地址 / 主题色。
 *
 * 观影记录通过 movie_details.cinema_id 关联（外键 ON DELETE SET NULL：
 * 删影院不停掉历史记录，只是它们的影院信息置空 —— 与 MovieLog 行为一致）。
 * 去重键 (family_id, place, name)：同一家影院不会存两份。
 */

declare(strict_types=1);

namespace App;

final class Cinema
{
    /** 50 色预设板（MovieLog cinemas.php 同一套） */
    public const PRESET_COLORS = [
        '#e74c3c', '#c0392b', '#e67e22', '#d35400', '#f39c12',
        '#f1c40f', '#f7dc6f', '#f5b041', '#f4d03f', '#f9e79f',
        '#f8c471', '#2ecc71', '#27ae60', '#1abc9c', '#16a085',
        '#58d68d', '#48c9b0', '#45b39d', '#82e0aa', '#a3e4d7',
        '#3498db', '#2980b9', '#2e86c1', '#5dade2', '#85c1e9',
        '#5499c7', '#aed6f1', '#9b59b6', '#8e44ad', '#af7ac5',
        '#bb8fce', '#d2b4de', '#e84393', '#fd79a8', '#e91e63',
        '#f06292', '#95a5a6', '#7f8c8d', '#bdc3c7', '#d5dbdb',
        '#aab7b8', '#99a3a4', '#a67c52', '#8d6e63', '#d4a574',
        '#c9a87c', '#00b894', '#0984e3', '#6c5ce7', '#fd79a8',
    ];

    /** @return array<int,array> 按地方、名称排序的全部影院 */
    public static function all(int $familyId): array
    {
        $st = Database::get()->prepare(
            'SELECT c.*, (SELECT COUNT(*) FROM movie_details d WHERE d.cinema_id = c.id) AS movie_count
             FROM cinemas c WHERE c.family_id = ? ORDER BY c.place, c.name'
        );
        $st->execute([$familyId]);
        return $st->fetchAll();
    }

    public static function find(int $familyId, int $id): ?array
    {
        $st = Database::get()->prepare(
            'SELECT * FROM cinemas WHERE id = ? AND family_id = ?'
        );
        $st->execute([$id, $familyId]);
        return $st->fetch() ?: null;
    }

    /**
     * 新建/更新影院。$place/$name/$address 已由调用方裁剪；
     * 返回 ''（成功）或错误文案。同名（含同地方）判重靠 uk_cinema。
     */
    public static function save(int $familyId, int $id, string $place, string $name,
                                ?string $address, string $color): string
    {
        if ($name === '') {
            return '影院名称不能为空';
        }
        if (mb_strlen($name, 'UTF-8') > 100) {
            return '影院名称太长了';
        }
        $place   = mb_substr($place, 0, 100, 'UTF-8');
        $address = $address !== null ? mb_substr($address, 0, 200, 'UTF-8') : null;
        $db      = Database::get();
        if ($id > 0) {
            $st = $db->prepare(
                'SELECT COUNT(*) FROM cinemas
                 WHERE family_id = ? AND place = ? AND name = ? AND id <> ?'
            );
            $st->execute([$familyId, $place, $name, $id]);
            if ((int)$st->fetchColumn() > 0) {
                return '已经有同地方同名的影院了';
            }
            $db->prepare('UPDATE cinemas SET place = ?, name = ?, address = ?, color = ? WHERE id = ? AND family_id = ?')
               ->execute([$place, $name, $address, $color, $id, $familyId]);
        } else {
            $st = $db->prepare(
                'SELECT COUNT(*) FROM cinemas WHERE family_id = ? AND place = ? AND name = ?'
            );
            $st->execute([$familyId, $place, $name]);
            if ((int)$st->fetchColumn() > 0) {
                return '已经有同地方同名的影院了';
            }
            $db->prepare('INSERT INTO cinemas (family_id, place, name, address, color) VALUES (?, ?, ?, ?, ?)')
               ->execute([$familyId, $place, $name, $address, $color]);
        }
        return '';
    }

    /** 删除影院；关联的观影记录 cinema_id 置空（外键级联），历史记录本身保留 */
    public static function destroy(int $familyId, int $id): void
    {
        Database::get()->prepare('DELETE FROM cinemas WHERE id = ? AND family_id = ?')
            ->execute([$id, $familyId]);
    }

    /** 把表单提交的颜色规范化成 #rrggbb（非法值回默认灰） */
    public static function normalizeColor(string $raw): string
    {
        $raw = trim($raw);
        if (preg_match('/^#([0-9a-fA-F]{6})$/', $raw, $m)) {
            return '#' . strtolower($m[1]);
        }
        if (preg_match('/^([0-9a-fA-F]{6})$/', $raw, $m)) {
            return '#' . strtolower($m[1]);
        }
        return '#888888';
    }
}