<?php

namespace App\Service;

use App\Model\Employee;
use App\Model\ExpenseClaims;
use App\Model\ExpenseClaimsDetails;
use App\Model\Fee;
use App\Model\Item;
use Carbon\Carbon;
use Illuminate\Support\Facades\DB;

class ExpenseClaimsService extends Service
{
    public function expenseClaimsList($data,$user){
        $model = $this->expenseClaimsSetCommon($data, $user);
        $list = $this->limit($model,'',$data);
        $list = $this->fillData($list);

        return [true, $list];
    }

    public function expenseClaimsSetCommon($data,$user, $field = []){
        if(empty($field)) $field = ExpenseClaims::$field;

        $model = ExpenseClaims::Clear($user,$data);
        $model = $model->where('del_time',0)
            ->select($field)
            ->orderby('id', 'desc');
        if(! empty($data['month'])) $model->where('month', $data['month']);
        if(! empty($data['code'])) $model->where('code', 'LIKE', '%'.$data['code'].'%');
        if(! empty($data['time'][0]) && ! empty($data['time'][1])) {
            $return = $this->changeDateToTimeStampAboutRange($data['time']);
            $model->where('month','>=',$return[0]);
            $model->where('month','<=',$return[1]);
        }

        return $model;
    }

    public function fillData($data){
        if(empty($data['data'])) return $data;

        $emp = (new EmployeeService())->getEmployeeMap(array_unique(array_column($data['data'],'crt_id')));

        foreach ($data['data'] as $key => $value){
            $data['data'][$key]['crt_time'] = $value['crt_time'] ? date('Y-m-d H:i:s',$value['crt_time']) : '';
            $data['data'][$key]['crt_name'] = $emp[$value['crt_id']] ?? '';
            $data['data'][$key]['month'] =  $value['month'] ? date('Y-m',$value['month']) : '';
        }

        return $data;
    }

    public function expenseClaimsAdd($data,$user){
        list($status,$msg) = $this->expenseClaimsRule($data, $user);
        if(! $status) return [$status, $msg];

        try {
            DB::beginTransaction();
            $model = new ExpenseClaims();
            $model->code = $this->generateBillNo([
                'top_depart_id' => $user['top_depart_id'],
                'type' => ExpenseClaims::Order_type,
                'period' => date("Ym", $data['month'])
            ]);
            $model->month = $data['month'];
            $model->crt_id = $user['id'];
            $model->top_depart_id = $data['top_depart_id'];
            $model->save();

            list($old, $new) = $this->saveDetail($model->id, time(), $data, $user);

            DB::commit();
        }catch (\Exception $exception){
            DB::rollBack();
            return [false, $exception->getLine()."_".$exception->getMessage()];
        }

        return [true, ['file' => ['old' => $old, 'new' => $new]]];
    }

    private function saveDetail($id, $time, $data, $user, $old = [])
    {
        $new = [];
        $unit = [];

        $oldFilesMap = array_flip($old);

        if (!empty($data['details']) && is_array($data['details'])) {
            foreach ($data['details'] as $value) {
                $unit[] = [
                    'expense_claims_id' => $id,
                    'item_id'           => $value['item_id'] ?? 0,
                    'employee_id'       => $value['employee_id'] ?? "",
                    'fee_id'            => $value['fee_id'] ?? 0,
                    'amount'            => $value['amount'] ?? 0,
                    'remark'            => $value['remark'] ?? "",
                    'claim_date'        => strtotime($value['claim_date']),
                    'entrust_type'      => $value['entrust_type'] ?? 0,
                    'expense_type'      => $value['expense_type'] ?? 0,
                    'voucher_no'        => $value['voucher_no'] ?? "",
                    'file_url'          => $value['file_url'] ?? "",
                    'file_name'         => $value['file_name'] ?? "",
                    'top_depart_id'     => $data['top_depart_id'] ?? 0,
                    'crt_time'          => $time,
                    'crt_id'            => $user['id'],
                ];

                $currentUrl = $value['file_url'] ?? "";
                if (!empty($currentUrl)) {
                    if (isset($oldFilesMap[$currentUrl])) {
                        unset($oldFilesMap[$currentUrl]);
                    } else {
                        $new[] = $currentUrl;
                    }
                }
            }

            if (!empty($unit)) ExpenseClaimsDetails::insert($unit);
        }

        return [array_keys($oldFilesMap), $new];
    }

    private function expenseClaimsRule(&$data, $user, $is_add = true){
        $data['top_depart_id'] = $user['top_depart_id'];
        if (empty($data['month'])) return [false, '月份不能为空'];
        $data['month'] = $this->changeDateToDate($data['month']);
//        if(!isset($data['month'])) return [false,"月份必传"];
//        $monthStr = $data['month']; // 假设是 "2026-03"
        $monthStart = $data['month'];
        // 获取该月最后一秒：下个月 1 号减去 1 秒
        $monthEnd = strtotime('+1 month', $monthStart) - 1;
        if(empty($data['details'])) return [false, '项目费用报销单详情不能为空'];
        foreach ($data['details'] as $index => $item) {
            if(empty($item['item_id'])) return [false, "第" . ($index + 1) . "行项目不能为空"];
            if(empty($item['fee_id'])) return [false, "第" . ($index + 1) . "行费用类型不能为空"];
            if(! isset($item['amount'])) return [false, "第" . ($index + 1) . "行费用金额不存在"];
            $res = $this->checkNumber($item['amount'], 2, 'non-negative');
            if (! $res['valid']) return [false,  "第" . ($index + 1) . "行费用金额" . $res['error']];

            if (!isset($item['claim_date'])) return [false, "第" . ($index + 1) . "行项费用产生日期缺失"];
            // 将报销日期转换为时间戳
            $claimTime = strtotime($item['claim_date']);
            // 判断：claim_date 必须早于 month
            // 如果 claim_date 是 2026-02-28，而 month 是 2026-03-01，则校验通过
            if ($claimTime < $monthStart || $claimTime > $monthEnd) return [false, "第" . ($index + 1) . "行项费用产生日期必须在当前月份内（" . date("Y-m", $data['month']) . "）"];
        }

        $query = ExpenseClaims::where('top_depart_id', $data['top_depart_id'])
            ->where('month', $monthStart)
            ->where('del_time', 0);

        if (!$is_add) {
            if (empty($data['id'])) return [false, 'ID不能为空'];
            $query->where('id', '<>', $data['id']);
        }

        if ($query->exists())  return [false, date("Y-m", $monthStart) . '已存在项目费用报销单'];

        return [true,""];
    }

    public function expenseClaimsEdit($data,$user){
        list($status,$msg) = $this->expenseClaimsRule($data, $user, false);
        if(!$status) return [$status,$msg];

        try {
            DB::beginTransaction();
            $model = ExpenseClaims::where('id',$data['id'])->first();
//            $model->month = $data['month'];
//            $model->crt_id = $user['id'];
//            $model->save();

            $time = time();
            $old = ExpenseClaimsDetails::where('del_time',0)
                ->where('expense_claims_id', $model->id)
                ->where('file_url','<>','')
                ->pluck('file_url')
                ->all();
            ExpenseClaimsDetails::where('del_time',0)
                ->where('expense_claims_id', $model->id)
                ->update(['del_time' => $time]);

            list($old, $new) = $this->saveDetail($model->id, $time, $data, $user, $old);

            DB::commit();
        }catch (\Exception $exception){
            DB::rollBack();
            return [false,$exception->getMessage()];
        }

        return [true, ['file' => ['old' => $old, 'new' => $new]]];
    }

    public function expenseClaimsDel($data){
        if($this->isEmpty($data,'id')) return [false,'请选择数据！'];

        try {
            DB::beginTransaction();
            $time = time();

            ExpenseClaims::where('del_time',0)
                ->whereIn('id',$data['id'])
                ->update(['del_time' => $time]);

            $old = ExpenseClaimsDetails::where('del_time',0)
                ->where('expense_claims_id', $data['id'])
                ->where('file_url','<>','')
                ->pluck('file_url')
                ->all();

            ExpenseClaimsDetails::where('del_time',0)
                ->whereIn('expense_claims_id', $data['id'])
                ->update(['del_time' => $time]);

            DB::commit();
        }catch (\Exception $exception){
            DB::rollBack();
            return [false,$exception->getMessage()];
        }

        return [true, ['file' => ['old' => $old]]];
    }

    public function expenseClaimsDetail($data, $user){
        if($this->isEmpty($data,'id')) return [false,'请选择数据！'];
        $customer = ExpenseClaims::where('del_time',0)
            ->where('id',$data['id'])
            ->first();
        if(empty($customer)) return [false,'单据不存在或已被删除'];
        $customer = $customer->toArray();
        $customer['crt_name'] = Employee::where('id',$customer['crt_id'])->value('title');
        $customer['crt_time'] = $customer['crt_time'] ? date("Y-m-d H:i:s",$customer['crt_time']): '';
        $customer['month'] = $this->UtcTime($customer['month']);
        $details = $this->getDetail($data,$user);
        $customer["details"] = $details;

        return [true, $customer];
    }

    private function getDetail($data,$user){
        $data = ExpenseClaimsDetails::where('del_time',0)
            ->where('expense_claims_id', $data['id'])
            ->get()->toArray();
        $item_ids = collect($data)->pluck('item_id')->unique()->values()->all();
        $employee_ids = collect($data)->pluck('employee_id')->unique()->values()->all();
        $fee_ids = collect($data)->pluck('fee_id')->unique()->values()->all();

        $item = Item::TopClear($user, $data);
        $item_key_list = $item->whereIn('id',$item_ids)->pluck('title','id');

        $item = Employee::TopClear($user, $data);
        $employee_key_list = $item->whereIn('id',$employee_ids)->pluck('title','id');

        $item = Fee::TopClear($user, $data);
        $fee_key_list = $item->whereIn('id',$fee_ids)->pluck('title','id');

        $fileUploadService = new FileUploadService();
        foreach ($data as &$v) {
            // 1. 假设数据库里的 claim_date 是 Unix 时间戳（整数）
            // 2. createFromTimestamp 第二个参数设为 'UTC' 确保时间轴对齐
            // 3. toIso8601ZuluString() 会自动生成 T 和 Z 以及 .000 毫秒
            $v['claim_date'] = $this->UtcTime( $v['claim_date']);
            $v['item_title'] = $item_key_list[$v['item_id']] ?? "";
            $v['employee_title'] = $employee_key_list[$v['employee_id']] ?? "";
            $v['fee_title'] = $fee_key_list[$v['fee_id']] ?? "";
            if(! empty($v['file_url'])) $v['file_url_show'] = $fileUploadService->getFileShow($v['file_url']);
        }

        return $data;
    }

    private function UtcTime($time){
        return  Carbon::createFromTimestamp($time, 'UTC')
            ->toIso8601ZuluString();
    }

    public function fillDataForExport($data, $column, &$return)
    {
        if (empty($data)) return;

        $mainIds = array_column($data, 'id');
        // 获取详情映射 [expense_claims_id => [details...]]
        $detailsMap = $this->getDetailsMap($mainIds);

        // 默认空行模板
        $defaultRow = array_fill_keys($column, '');

        foreach ($data as $main) {
            $mainId = $main['id'];
            $details = $detailsMap[$mainId] ?? [];

            // 提取主表信息
            $mainInfo = [
                'code'  => $main['code'],
                'month' => $main['month'] ? date('Y-m', $main['month']) : '',
            ];

            if (empty($details)) {
                // 如果没有详情，至少导出一行主表信息
                $return[] = array_merge($defaultRow, $mainInfo);
            } else {
                // 遍历明细，每一行明细都带上主表的 code 和 month
                foreach ($details as $sub) {
                    // 合并主表字段 + 详情字段
                    $fullRow = array_merge($mainInfo, $sub);
                    // 仅保留 column 配置中要求的列
                    $return[] = array_merge($defaultRow, array_intersect_key($fullRow, $defaultRow));
                }
            }
        }
    }

    public function getDetailsMap($main_ids)
    {
        // 1. 获取详情
        $details = ExpenseClaimsDetails::where('del_time', 0)
            ->whereIn('expense_claims_id', $main_ids)
            ->get();

        if ($details->isEmpty()) return [];

        // 2. 批量提取所有关联 ID 用于预加载
        $empIds = $details->pluck('employee_id')->filter()->unique();
        $itemIds = $details->pluck('item_id')->unique();
        $feeIds = $details->pluck('fee_id')->unique();

        // 3. 建立档案映射 Map
        $empMap = Employee::whereIn('id', $empIds)->get()->keyBy('id');
        $itemMap = Item::whereIn('id', $itemIds)->get()->keyBy('id');
        $feeMap = Fee::whereIn('id', $feeIds)->get()->keyBy('id');

        $res = [];
        foreach ($details as $item) {
            $tmpEmp = $empMap[$item->employee_id] ?? null;
            $tmpItem = $itemMap[$item->item_id] ?? null;
            $tmpFee = $feeMap[$item->fee_id] ?? null;

            // 4. 组装明细行字段 (key 要与模板配置中的 export 对应)
            $res[$item->expense_claims_id][] = [
                'employee_number'     => $tmpEmp ? $tmpEmp->number : '',
                'employee_title'      => $tmpEmp ? $tmpEmp->title : '',
                'item_code'           => $tmpItem ? $tmpItem->code : '',
                'item_title'          => $tmpItem ? $tmpItem->title : '',
                'fee_code'            => $tmpFee ? $tmpFee->code : '',
                'fee_title'           => $tmpFee ? $tmpFee->title : '',
                'amount'              => $item->amount,
                'claim_date'          => $item->claim_date ? date('Y-m-d', $item->claim_date) : '',
                'voucher_no'          => $item->voucher_no,
                'remark'              => $item->remark,
                'entrust_type_title'  => ExpenseClaimsDetails::State_Type[$item->entrust_type] ?? '',
                'expense_type_title'  => ExpenseClaimsDetails::State_Type_2[$item->expense_type] ?? '',
            ];
        }
        return $res;
    }
}