<?php

/**
 * 文件功能：节日福利后台管理控制器
 *
 * 管理员可在此创建、编辑、删除节日福利活动，
 * 也可手动立即触发活动，以及查看领取明细。
 *
 * @author  ChatRoom Laravel
 *
 * @version 1.0.0
 */

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Http\Requests\StoreHolidayEventRequest;
use App\Http\Requests\UpdateHolidayEventRequest;
use App\Jobs\TriggerHolidayEventJob;
use App\Models\HolidayEvent;
use App\Services\HolidayEventScheduleService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\View\View;

/**
 * 类功能：管理节日福利模板的后台增删改查与手动触发操作。
 */
class HolidayEventController extends Controller
{
    /**
     * 注入节日福利调度计算服务。
     */
    public function __construct(
        private readonly HolidayEventScheduleService $scheduleService,
    ) {}

    /**
     * 节日福利活动列表页。
     */
    public function index(): View
    {
        $events = HolidayEvent::query()
            ->orderByDesc('send_at')
            ->paginate(20);

        return view('admin.holiday-events.index', compact('events'));
    }

    /**
     * 新建活动表单页。
     */
    public function create(): View
    {
        return view('admin.holiday-events.create');
    }

    /**
     * 保存新活动。
     */
    public function store(StoreHolidayEventRequest $request): RedirectResponse
    {
        HolidayEvent::create($this->buildPayload($request->validated(), true));

        return redirect()->route('admin.holiday-events.index')->with('success', '节日福利活动创建成功！');
    }

    /**
     * 编辑活动表单页。
     */
    public function edit(HolidayEvent $holidayEvent): View
    {
        return view('admin.holiday-events.edit', ['event' => $holidayEvent]);
    }

    /**
     * 更新活动。
     */
    public function update(UpdateHolidayEventRequest $request, HolidayEvent $holidayEvent): RedirectResponse
    {
        $holidayEvent->update($this->buildPayload($request->validated()));

        return redirect()->route('admin.holiday-events.index')->with('success', '活动已更新！');
    }

    /**
     * 切换活动启用/禁用状态。
     */
    public function toggle(HolidayEvent $holidayEvent): JsonResponse
    {
        $holidayEvent->update(['enabled' => ! $holidayEvent->enabled]);

        return response()->json([
            'ok' => true,
            'enabled' => $holidayEvent->enabled,
            'message' => $holidayEvent->enabled ? '已启用' : '已禁用',
        ]);
    }

    /**
     * 手动立即触发活动（管理员操作）。
     */
    public function triggerNow(HolidayEvent $holidayEvent): RedirectResponse
    {
        if (! $holidayEvent->enabled || $holidayEvent->status === 'cancelled') {
            return back()->with('error', '当前活动未启用或已取消，不能立即触发。');
        }

        // 立即触发只生成临时批次，不覆盖年度锚点或下次计划时间。
        TriggerHolidayEventJob::dispatch($holidayEvent, true);

        return back()->with('success', '活动已触发，请稍后刷新查看状态。');
    }

    /**
     * 删除活动。
     */
    public function destroy(HolidayEvent $holidayEvent): RedirectResponse
    {
        $holidayEvent->delete();

        return redirect()->route('admin.holiday-events.index')->with('success', '活动已删除。');
    }

    /**
     * 组装节日福利模板的可持久化字段。
     *
     * @param  array<string, mixed>  $data
     * @return array<string, mixed>
     */
    private function buildPayload(array $data, bool $isCreating = false): array
    {
        $payload = $data;

        // 创建与编辑都统一回收无效字段，避免模板状态互相污染。
        if (($payload['distribute_type'] ?? 'random') === 'random') {
            $payload['fixed_amount'] = null;
        } else {
            $payload['min_amount'] = 1;
            $payload['max_amount'] = null;
        }

        if (($payload['target_type'] ?? 'all') !== 'level') {
            $payload['target_value'] = null;
        }

        if (($payload['repeat_type'] ?? 'once') !== 'cron') {
            $payload['cron_expr'] = null;
        }

        if (($payload['repeat_type'] ?? 'once') === 'yearly') {
            $payload['send_at'] = $this->scheduleService
                ->resolveNextConfiguredSendAt($payload)
                ->toDateTimeString();
        } else {
            $payload['schedule_month'] = null;
            $payload['schedule_day'] = null;
            $payload['schedule_time'] = null;
            $payload['duration_days'] = 1;
            $payload['daily_occurrences'] = 1;
            $payload['occurrence_interval_minutes'] = null;
        }

        // 每次保存模板时，都让系统按新配置重新进入待触发状态。
        $payload['status'] = 'pending';
        $payload['enabled'] = (bool) ($payload['enabled'] ?? true);
        $payload['triggered_at'] = null;
        $payload['expires_at'] = null;
        $payload['claimed_count'] = 0;
        $payload['claimed_amount'] = 0;

        return $payload;
    }
}