<?php
declare(strict_types=1);
namespace ywxapp\model;

use ywxapp\model\BaseModel;
use ywxapp\model\Medal;

use think\facade\Db;
use think\model\concern\SoftDelete;

/**
 * 站点任务
 */
class Task extends BaseModel
{
    use SoftDelete;

    protected $name = 'task';
    protected $deleteTime = 'delete_at';
    protected $defaultSoftDelete = 0;

    // 时间戳自动写入
    protected $autoWriteTimestamp = true;
    protected $createTime = 'create_at';
    protected $updateTime = 'update_at';

    // 奖励类型
    const REWARD_SCORE = 1;  // 积分
    const REWARD_COIN  = 2;  // 金币
    const REWARD_PROP  = 3;  // 道具
    const REWARD_MEDAL = 4;  // 勋章

    /**
     * 奖励类型列表（后台下拉 / 前台展示）
     */
    public static function rewardTypeList(): array
    {
        return [
            self::REWARD_SCORE => '积分',
            self::REWARD_COIN  => '金币',
            self::REWARD_PROP  => '道具',
            self::REWARD_MEDAL => '勋章',
        ];
    }

    public static function getRewardTypeText(int $type): string
    {
        return self::rewardTypeList()[$type] ?? '未知';
    }

    /**
     * 启用中的任务（前台展示）
     */
    public static function getEnabledList()
    {
        return self::where('status', 1)->order('sort', 'asc')->select();
    }

    /**
     * 取某用户已领取的任务ID集合
     */
    public static function getClaimedTaskIds(int $uid): array
    {
        self::ensureSchema(); // 确保 member_task / member_prop 关联表已就绪（静态入口可能未实例化模型）
        if ($uid <= 0) {
            return [];
        }
        return Db::name('member_task')->where('uid', $uid)->column('task_id') ?: [];
    }

    /**
     * 领取任务并发放奖励（幂等：同一任务仅可领取一次）
     * @return array [bool $ok, string $msg]
     */
    public static function claim(int $uid, int $taskId): array
    {
        self::ensureSchema(); // 确保 user_task / user_prop 等关联表已就绪（静态入口可能未实例化模型）
        if ($uid <= 0) {
            return [false, '请先登录'];
        }
        $task = self::where('id', $taskId)->where('status', 1)->find();
        if (!$task) {
            return [false, '任务不存在或未启用'];
        }
        $task = $task->toArray();

        // 是否已领取
        $exists = Db::name('member_task')->where('uid', $uid)->where('task_id', $taskId)->find();
        if ($exists) {
            return [false, '该任务已领取'];
        }

        $num = (int) $task['reward_num'];
        if ($num <= 0) {
            return [false, '奖励数量无效'];
        }

        Db::startTrans();
        try {
            // 发放奖励
            switch ((int) $task['reward_type']) {
                case self::REWARD_SCORE:
                    [$ok, $msg] = \ywxapp\model\Score::change($uid, \ywxapp\model\Score::TYPE_GAIN, $num, '完成任务：' . $task['title']);
                    if (! $ok) {
                        throw new \Exception($msg);
                    }
                    break;
                case self::REWARD_COIN:
                    Db::name('member_wallets')->where('uid', $uid)->inc('coins', $num)->update();
                    Db::name('member_bill')->insert([
                        'uid'         => $uid,
                        'currency'    => 2, // 2=金币
                        'type'        => 1, // 1=收入
                        'amount'      => $num,
                        'balance'     => Db::name('member_wallets')->where('uid', $uid)->value('coins') ?: $num,
                        'remark'      => '完成任务：' . $task['title'],
                        'create_at'   => time(),
                    ]);
                    break;
                case self::REWARD_PROP:
                    Db::name('member_prop')->insert([
                        'uid'         => $uid,
                        'prop_id'     => $num, // reward_num 存道具ID
                        'num'         => (int) ($task['prop_num'] ?: 1),
                        'create_at' => time(),
                    ]);
                    break;
                case self::REWARD_MEDAL:
                    // reward_num 存勋章ID
                    $grant = Medal::grant($uid, $num);
                    if (!$grant[0]) {
                        throw new \Exception($grant[1]);
                    }
                    break;
                default:
                    throw new \Exception('未知奖励类型');
            }

            // 领取记录
            Db::name('member_task')->insert([
                'uid'         => $uid,
                'task_id'     => $taskId,
                'reward_type' => $task['reward_type'],
                'reward_num'  => $num,
                'create_at' => time(),
            ]);

            Db::commit();
            return [true, '领取成功'];
        } catch (\Throwable $e) {
            Db::rollback();
            return [false, '领取失败：' . $e->getMessage()];
        }
    }

    /**
     * 表自愈：确保任务相关表（member_prop / member_task）与扩展列已就绪。
     */
    public static function ensureSchema(): void
    {
        $prefix = BaseModel::currentPrefix();
        BaseModel::ensureTableFromInstall($prefix, 'task');
        BaseModel::ensureTableFromInstall($prefix, 'member_prop');
        BaseModel::ensureTableFromInstall($prefix, 'member_task');
        BaseModel::ensureColumn("{$prefix}member", 'score', "int unsigned NOT NULL DEFAULT 0 COMMENT '积分(做任务/互动获得)'");
        BaseModel::ensureColumn("{$prefix}task", 'prop_num', "int NOT NULL DEFAULT 1 COMMENT '道具数量(奖励类型为道具时生效)'");
    }
}