<?php

namespace App\Service;

use App\Jobs\ProcessDataJob;
use App\Model\RD;
use Carbon\Carbon;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\DB;

class RdGenerateDeviceService extends Service
{
    const job_name = "rd_device_set";
    /**
     * 外部调用的入口
     */
    public function generate(array $data)
    {
        // 1. 基础校验
        if (empty($data['month'])) {
            return [false, '请选择生成研发设备工时单年月'];
        }

        $monthStart = Carbon::createFromFormat('Y-m', $data['month'])->startOfMonth()->timestamp;

        // 2. 业务状态校验 (提出来的校验逻辑)
        $calendar = DB::table('calendar')
            ->where('del_time', 0)
            ->where('time', $monthStart)
            ->first();

        if (!$calendar) return [false, '当月日历未配置'];

        $hasWorkDays = DB::table('calendar_details')
            ->where('del_time', 0)
            ->where('calendar_id', $calendar->id)
            ->where('is_work', 1)
            ->exists();

        if (!$hasWorkDays) return [false, '当月无工作日，无法生成'];

        $key = self::job_name . $data['month'];
        $data['lock_key'] = $key;

        list($status,$msg) = $this->limitingSendRequest($key);
        if(! $status) return [false, '该月设备数据已在后台处理，请勿重复操作'];

        ProcessDataJob::dispatch($data)->onQueue(self::job_name);

        return [true, '任务已提交至后台处理，请稍后查看'];
    }

    public function delTableKey($key){
        $this->dellimitingSendRequest($key);
    }

    public function doGenerate(string $month)
    {
        $monthStart = Carbon::createFromFormat('Y-m', $month)->startOfMonth()->timestamp;
        $monthEnd   = Carbon::createFromFormat('Y-m', $month)->endOfMonth()->timestamp;

        $calendar = DB::table('calendar')->where('del_time', 0)->where('time', $monthStart)->first();
        $workDays = DB::table('calendar_details')
            ->where('del_time', 0)
            ->where('calendar_id', $calendar->id)
            ->where('is_work', 1)
            ->orderBy('time')
            ->pluck('time')
            ->toArray();

        // 获取当月启用的研发项目
        $items = DB::table('item')
            ->where('del_time', 0)
            ->where('is_use', 1)
            ->where('start_time', '<=', $monthEnd)
            ->where('end_time', '>=', $monthStart)
            ->get();

        if ($items->isEmpty()) return;

        $itemIds = $items->pluck('id')->toArray();

        // 删除当月该设备类型（type=2）的老数据
        $rds = DB::table('rd')
            ->where('del_time', 0)
            ->where('type', RD::type_two)
            ->whereIn('item_id', $itemIds)
            ->whereBetween('order_time', [$monthStart, $monthEnd])
            ->pluck('id')
            ->toArray();

        if (!empty($rds)) {
            DB::table('rd_details')->whereIn('rd_id', $rds)->delete();
            DB::table('rd')->whereIn('id', $rds)->delete();
        }

        // 直接获取所有有效的设备档案ID
        $device_ids = DB::table('device')
            ->where('del_time', 0)
            ->pluck('id')
            ->toArray();

        foreach ($device_ids as $device_id) {
            // 为每个设备生成月度工时单
            $this->generateDeviceMonth($device_id, $items, $workDays, $calendar);
        }
    }

    protected function generateDeviceMonth(int $device_id, $items, array $workDays, $calendar)
    {
        // 获取该设备在当月的总分配工时配置
        $deviceMonth = DB::table('device_details')
            ->where('del_time', 0)
            ->where('device_id', $device_id)
            ->where('time', $calendar->time)
            ->first();

        if (!$deviceMonth || $deviceMonth->total_hours_2 <= 0) return;

        // 1. 月总工时取整为满小时 (60的倍数)
        $totalMinutes = intval(round($deviceMonth->total_hours_2 * 60) / 60) * 60;

        // 筛选出在该设备有效周期内且在进行的研发项目
        $validDays = [];
        foreach ($workDays as $day) {
            $dayItems = [];
            foreach ($items as $item) {
                if ($day >= $item->start_time && $day <= $item->end_time) {
                    $dayItems[] = $item;
                }
            }
            if (!empty($dayItems)) $validDays[$day] = $dayItems;
        }

        if (empty($validDays)) return;

        // 2. 随机化每日总工时分布 (例如 184小时分到23天，每天8小时)
        $daysCount = count($validDays);
        $avgDailyMinutes = intval(floor($totalMinutes / $daysCount) / 60) * 60;
        $remainderMinutes = $totalMinutes - ($avgDailyMinutes * $daysCount);

        $dailyMinutesMap = [];
        foreach (array_keys($validDays) as $day) {
            $dailyMinutesMap[$day] = $avgDailyMinutes;
        }

        if ($remainderMinutes > 0) {
            $extraHours = $remainderMinutes / 60;
            $dayKeys = array_keys($validDays);
            shuffle($dayKeys);
            for ($i = 0; $i < $extraHours; $i++) {
                $targetDay = $dayKeys[$i % $daysCount];
                if ($dailyMinutesMap[$targetDay] < 480) { // 单日最高 8 小时
                    $dailyMinutesMap[$targetDay] += 60;
                } else {
                    $extraHours++;
                }
            }
        }

        // 3. 遍历日期并“离散化”分配项目工时
        foreach ($validDays as $day => $dayItems) {
            $dailyMinutes = $dailyMinutesMap[$day];
            if ($dailyMinutes <= 0) continue;

            $totalHoursToday = $dailyMinutes / 60; // 今天要分配的总小时数

            // 初始化每个项目的分钟数容器
            $projectMinutes = [];
            foreach ($dayItems as $idx => $item) {
                $projectMinutes[$idx] = 0;
            }

            // 获取项目索引并打乱，增加公平性
            $itemIndexes = array_keys($dayItems);

            // --- 核心离散逻辑：随机发牌法 ---
            for ($h = 0; $h < $totalHoursToday; $h++) {
                // 如果项目很多（比如20个），这里每次随机选一个
                // 结果会非常离散：可能8小时分给了8个不同的项目，每个项目1小时
                $randomIndex = $itemIndexes[array_rand($itemIndexes)];
                $projectMinutes[$randomIndex] += 60;
            }

            // 4. 执行生成
            foreach ($dayItems as $idx => $item) {
                if (isset($projectMinutes[$idx]) && $projectMinutes[$idx] > 0) {
                    // 调用之前定义的 createRd 写入数据库
                    $this->createRd($item->id, $day, $projectMinutes[$idx], $device_id);
                }
            }
        }
    }

    protected function createRd(int $itemId, int $dayTime, int $minutes, int $device_id)
    {
        $dayStart   = Carbon::createFromTimestamp($dayTime)->setTime(8, 0);
        $lunchStart = Carbon::createFromTimestamp($dayTime)->setTime(11, 30);
        $lunchEnd   = Carbon::createFromTimestamp($dayTime)->setTime(12, 0);
        $dayEnd     = Carbon::createFromTimestamp($dayTime)->setTime(16, 30);

        $availableMinutes = 480;
        $minutes = min($minutes, $availableMinutes);

        $maxOffset = $availableMinutes - $minutes;
        $randomOffset = (intval($maxOffset / 30) > 0) ? mt_rand(0, intval($maxOffset / 30)) * 30 : 0;

        $start = $dayStart->copy()->addMinutes($randomOffset);
        $end = $start->copy();
        $remaining = $minutes;

        if ($start->lt($lunchStart)) {
            $morningLeft = $lunchStart->diffInMinutes($start);
            if ($remaining <= $morningLeft) {
                $end->addMinutes($remaining);
            } else {
                $remaining -= $morningLeft;
                $end = $lunchEnd->copy()->addMinutes($remaining);
            }
        } else {
            $end->addMinutes($remaining);
        }

        if ($end->gt($dayEnd)) {
            $end = $dayEnd->copy();
        }

        $crtTime = Carbon::createFromTimestamp($dayTime)->setTime(16, 30)->addSeconds(mt_rand(0, 1800))->timestamp;
        $orderNumber = 'DEV' . date('Ymd', $dayTime) . mt_rand(1000, 9999) . substr(uniqid(), -3);

        $rdId = DB::table('rd')->insertGetId([
            'crt_time' => $crtTime,
            'order_time' => $dayTime,
            'item_id' => $itemId,
            'start_time_hour' => $start->hour,
            'start_time_min' => $start->minute,
            'end_time_hour' => $end->hour,
            'end_time_min' => $end->minute,
            'total_hours' => $minutes,
            'order_number' => $orderNumber,
            'type' => RD::type_two, // 设备工时单类型为 2
            'del_time' => 0
        ]);

        DB::table('rd_details')->insert([
            'rd_id' => $rdId,
            'data_id' => $device_id, // 存储设备ID
            'type' => RD::type_two,   // 类型为 2
            'crt_time' => $crtTime,
            'upd_time' => $crtTime,
            'del_time' => 0
        ]);
    }
}