<?php

namespace App\Services\Admin\YeWu;

use DateTime;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;

use Exception;

class RosterService
{
    public function generatePlans($dateRange, $planModelIds, $userId, $dateType = 1, $holidayEnable = 1)
    {
        // 1. 基础参数校验
        if (!is_array($dateRange) || count($dateRange) != 2 || empty($planModelIds)) {
            throw new Exception('日期范围或模板ID参数错误');
        }

        // 2. 获取模板信息并校验状态
        $models = DB::table('s_source_roster')
            ->whereIn('id', $planModelIds)
            ->get();

        if ($models->isEmpty()) {
            throw new Exception('未找到有效的排班模板');
        }

        foreach ($models as $model) {
            if ($model->status != 1 || $model->is_del != 0) {
                throw new Exception("模板状态异常，请重新选择！异常模板Id: {$model->id}");
            }
        }

        // 获取部门ID (用于查重，取第一个模板的部门ID，假设批量操作通常针对同一部门)
        // 如果业务允许跨部门混合勾选，这里可能需要调整查重逻辑（按部门分组查）
        $department_id = $models->first()->department_id;

        $start_date = new DateTime($dateRange[0]);
        $end_date = new DateTime($dateRange[1]);

        // ==========================================
        // 【核心】3. 重复性检测 (在事务外执行，提高性能)
        // ==========================================
        $this->checkDuplicateRecords(
            $department_id,
            $planModelIds,
            $start_date,
            $end_date,
            $models
        );
        // 如果上面没抛异常，说明没有重复，继续往下执行

        // 4. 获取节假日列表
        $holiday_list = DB::table('s_holiday')
            ->whereBetween('date', $dateRange)
            ->where(['type' => 2])
            ->pluck('date')
            ->toArray();

        $success_count = 0;

        // 5. 开启事务
        DB::beginTransaction();
        try {
            $current_date = clone $start_date;

            while ($current_date <= $end_date) {
                $current_date_str = $current_date->format('Y-m-d');

                // --- 逻辑判断：节假日过滤 ---

                // 如果是“仅节假日”模式 (date_type == 2)，且当天不是节假日 -> 跳过
                if ($dateType == 2 && !in_array($current_date_str, $holiday_list)) {
                    $current_date->modify('+1 day');
                    continue;
                }

                // 如果“节假日不可用” (HolidayEnable == 0)，且当天是节假日 -> 跳过
                if ($holidayEnable == 0 && in_array($current_date_str, $holiday_list)) {
                    $current_date->modify('+1 day');
                    continue;
                }

                // --- 获取星期 ---
                $weekday = (int)$current_date->format('w');
                $weekname = $this->getWeekName($weekday);

                foreach ($models as $model) {
                    // --- 逻辑判断：星期匹配 ---
                    // 如果是“按星期”模式 (date_type == 1) 且模板也是按星期定义的，必须星期一致
                    if ($dateType == 1 && isset($model->date_type) && $model->date_type == 1) {
                        if ($model->weekname !== $weekname) {
                            continue;
                        }
                    }

                    // --- 构造插入数据 ---
                    $data = [
                        'roster_id' => $model->id,
                        'date' => $current_date_str,
                        'weekname' => $weekname,
                        'department_id' => $model->department_id,
                        'resources_id' => $model->resources_id ?? null,
                        'device_id' => $model->device_id ?? null,
                        'period_id' => $model->period_id ?? null,
                        'patient_type' => $model->patient_type ?? null,
                        'begin_time' => $model->begin_time,
                        'end_time' => $model->end_time,
                        'end_reservation_time' => $model->end_reservation_time ?? null,
                        'time_unit' => $model->time_unit ?? null,
                        'status' => 1,
                        'adduser' => $userId,
                        'is_del' => 0,
                        'created_at' => date('Y-m-d H:i:s'),
                        'updated_at' => date('Y-m-d H:i:s'),
                    ];

                    // --- 插入主表 ---
                    $plan_id = DB::table('s_source_roster_detail')->insertGetId($data);

                    if (!$plan_id) {
                        throw new Exception("号源明细插入失败，日期：{$current_date_str}, 模板ID：{$model->id}");
                    }
                    $success_count++;

                    // --- 插入关联表：数量配置 ---
                    $this->insertCountInfo($plan_id, $model->id);

                    // --- 插入关联表：设备配置 ---
                    // 注意：原逻辑如果 device_id 为空会报错，这里保持原逻辑
                    $this->insertDeviceInfo($plan_id, $model->device_id, $model->id);
                }

                $current_date->modify('+1 day');
            }

            // 6. 提交事务
            DB::commit();

            return ['success' => true, 'count' => $success_count];

        } catch (Exception $e) {
            // 7. 异常回滚
            DB::rollBack();
            // 记录日志
            Log::error('Roster Generation Failed: ' . $e->getMessage(), [
                'dateRange' => $dateRange,
                'user_id' => $userId
            ]);
            // 重新抛出，让 Controller 处理
            throw $e;
        }
    }

    /**
     * 独立的重复检测方法
     * 如果发现重复，直接抛出包含详细信息的异常
     */
    private function checkDuplicateRecords($department_id, $planModelIds, $startDate, $endDate, $models)
    {
        $startStr = $startDate->format('Y-m-d');
        $endStr = $endDate->format('Y-m-d');

        // 查询已存在的记录
        $checkList = DB::table('s_source_roster_detail')
            ->where('department_id', $department_id)
            ->whereIn('roster_id', $planModelIds)
            ->where('date', '>=', $startStr)
            ->where('date', '<=', $endStr)
            ->where('is_del', 0)
            ->get();

        if ($checkList->isNotEmpty()) {
            // 构造详细的错误提示信息 (完全还原你原代码的逻辑)
            $msg = '已有重复的计划明细，禁止创建！当前选中的';
            $msglist = '';
            $msgIds = '';

            // 优化：将检查结果转为映射数组，避免双重循环 O(N*M)
            // key: roster_id, value: array of items
            $checkMap = [];
            foreach ($checkList as $item) {
                if (!isset($checkMap[$item->roster_id])) {
                    $checkMap[$item->roster_id] = [];
                }
                $checkMap[$item->roster_id][] = $item;
            }

            foreach ($models as $model) {
                if (isset($checkMap[$model->id])) {
                    foreach ($checkMap[$model->id] as $item) {
                        $msglist .= $item->date . ' ';
                        $msgIds .= $item->id . ' ';
                        // 拼接模板信息
                        $msg .= " " . $model->weekname . $model->begin_time . '-' . $model->end_time . " ";
                    }
                }
            }

            $fullErrorMessage = $msg . '已存在相同记录,</br>存在于:</br>' . $msglist . '</br>对应记录Id为：' . $msgIds . '</br>请先删除后再操作';

            // 抛出异常，中断流程
            throw new Exception($fullErrorMessage);
        }
    }

    private function getWeekName($weekday) {
        $map = ['星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'];
        return $map[$weekday] ?? '';
    }

    private function insertCountInfo($detailId, $rosterId) {
        $model_count_info = DB::table('s_source_roster_count')->where(['roster_id' => $rosterId])->get();

        if ($model_count_info->isEmpty()) {
            throw new Exception("模板数量信息异常，请重新选择！异常模板Id: {$rosterId}");
        }

        foreach ($model_count_info as $info) {
            $success = DB::table('s_source_roster_detail_count')->insert([
                'roster_detail_id' => $detailId,
                'appointment_type_id' => $info->appointment_type_id,
                'count' => $info->count,
                'max_total' => $info->max_total,
                'created_at' => date('Y-m-d H:i:s'),
                'updated_at' => date('Y-m-d H:i:s'),
            ]);
            if (!$success) {
                throw new Exception("渠道数量创建失败");
            }
        }
    }

    private function insertDeviceInfo($detailId, $deviceIdStr, $modelId) {
        // 保持原逻辑：如果模板没配设备，视为异常
        if (empty($deviceIdStr)) {
            throw new Exception("模板未关联设备，请重新选择！异常模板Id: {$modelId}");
        }

        $device_ids = explode(",", $deviceIdStr);
        foreach ($device_ids as $dv_value) {
            $dv_value = trim($dv_value);
            if ($dv_value === '') continue;

            $success = DB::table('s_source_roster_detail_device')->insert([
                'roster_detail_id' => $detailId,
                'device_id' => $dv_value,
                'created_at' => date('Y-m-d H:i:s'),
                'updated_at' => date('Y-m-d H:i:s'),
            ]);

            if (!$success) {
                throw new Exception("设备关联创建失败");
            }
        }
    }
}