<?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];
    }

    private 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('month', 'desc');
        if(! empty($data['month'])) $model->where('month', $data['month']);
        if(! empty($data['code'])) $model->where('code', 'LIKE', '%'.$data['code'].'%');

        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();
            $month = strtotime(date("Ymd", strtotime($data['month'])));
            $model = new ExpenseClaims();
            $model->code = $this->generateBillNo([
                'top_depart_id' => $user['top_depart_id'],
                'type' => ExpenseClaims::Order_type,
                'period' => $month
            ]);
            $model->month = $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){
        $data['top_depart_id'] = $user['top_depart_id'];
        if(!isset($data['month'])) return [false,"月份必传"];
        $monthStr = $data['month']; // 假设是 "2026-03"
        $monthStart = strtotime($monthStr); // 2026-03-01 00:00:00
        // 获取该月最后一秒：下个月 1 号减去 1 秒
        $monthEnd = strtotime("$monthStr +1 month") - 1;
        foreach ($data['details'] as $index => $item) {
            if (!isset($item['claim_date'])) {
                return [false, "第" . ($index + 1) . "项报销日期缺失"];
            }
            // 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) . "项报销日期必须在当前月份内（" . $data['month'] . "）"];
            }
        }
        return [true,""];
    }

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

        try {
            DB::beginTransaction();
            $month = strtotime(date("Ymd", strtotime($data['month'])));
            $model = ExpenseClaims::where('id',$data['id'])->first();
            $model->month =  $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();

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

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

        $item = Fee::Clear($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();
    }
}