<?php

namespace App\Http\Controllers\Api;

use App\Admin\Filters\LedgerItemFilter;
use App\Models\Keyword;
use App\Models\LedgerItem;
use App\Services\StatisticService;
use Illuminate\Http\Request;
use Illuminate\Support\Arr;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\DB;

class StatisticsController extends Controller
{
    /**
     * 首页统计
     */
    public function dashboard(Request $request, StatisticService $statisticService): array
    {
        $request->validate(
            rules: ['date' => ['filled', 'date_format:Y-m-d']],
            attributes: ['date' => '日期'],
        );

        $input = Arr::except($this->filterInput($request), 'date');

        $date = Carbon::yesterday();
        if ($request->filled('date')) {
            $date = Carbon::parse($request->input('date'));
        }

        // 本月上报数据统计
        $monthLedger = array_merge(
            ['deadline' => $date->format('Y-m-d')],
            $statisticService->ledger(
                array_merge($input, [
                    'start_at' => $date->copy()->startOfMonth()->toDateString(),
                    'end_at' => $date->copy()->toDateString(),
                ])
            ),
        );

        // 昨日总账录入
        $yesdayLedger = array_merge(
            ['date' => $date->format('Y-m-d')],
            $statisticService->ledger(
                array_merge($input, [
                    'start_at' => $date->copy()->toDateString(),
                    'end_at' => $date->copy()->toDateString(),
                ])
            ),
        );

        // 近30天趋势数据
        $trendsOf30days = $statisticService->dailyLedgerTrend(
            $date->copy()->subDays(29),
            $date->copy(),
            $input,
        );

        return [
            // 本月总账录入
            'current_month_ledger' => $monthLedger,
            // 昨日累计金额
            'yesday_ledger' => $yesdayLedger,
            // 近30天趋势数据
            'trends_of_30days' => $trendsOf30days,
        ];
    }

    /**
     * 总账统计
     */
    public function ledger(Request $request, StatisticService $statisticService)
    {
        $request->validate(
            rules: [
                'start_at' => ['bail', 'required', 'date_format:Y-m-d'],
                'end_at' => ['bail', 'required', 'date_format:Y-m-d'],
                'before_start_at' => ['bail', 'required', 'date_format:Y-m-d'],
                'before_end_at' => ['bail', 'required', 'date_format:Y-m-d'],
            ],
            attributes: [
                'start_at' => '开始日期',
                'end_at' => '结束日期',
                'before_start_at' => '对比开始日期',
                'before_end_at' => '对比结束日期',
            ],
        );

        $input = $this->filterInput($request);

        $dateRange1 = $request->input('start_at').','.$request->input('end_at');
        $dateRange2 = $request->input('before_start_at').','.$request->input('before_end_at');

        $ledger = $statisticService->ledger(
            array_merge($input, ['date_range' => $dateRange1])
        );

        $beforeLedger = $statisticService->ledger(
            array_merge($input, ['date_range' => $dateRange2])
        );

        // 销售涨幅
        $salesGrowthRate = 0;

        if (bccomp($beforeLedger['sales'], '0', 2) === 0) {
            $salesGrowthRate = '-';
        } else {
            $diff = bcsub($ledger['sales'], $beforeLedger['sales'], 2);
            $salesGrowthRate = bcdiv(bcmul($diff, '100'), $beforeLedger['sales'], 2);
        }

        /** @var \Illuminate\Database\Eloquent\Collection */
        $lotteryTypes = Keyword::where('parent_key', 'lottery_type')->oldest('sort')->get();

        /** @var \Illuminate\Support\Collection */
        $lotteryTypeStatistics = LedgerItem::select([
            'ledger_item_type_id',
            DB::raw('SUM(sales) as sales'),
            DB::raw('SUM(expenditure) as expenditure'),
        ])
            ->filter(array_merge($input, ['date_range' => $dateRange1]), LedgerItemFilter::class)
            ->whereIn('ledger_item_type_id', $lotteryTypes->pluck('key'))
            ->groupBy(['ledger_item_type_id'])
            ->get()
            ->keyBy('ledger_item_type_id');

        return array_merge($ledger, [
            'sales_growth_rate' => $salesGrowthRate,
            'lottery_types' => $lotteryTypes->map(function ($lotteryType) use ($lotteryTypeStatistics) {
                $aggregate = $lotteryTypeStatistics->get($lotteryType->key);

                return [
                    'name' => $lotteryType->name,
                    'sales' => trim_zeros($aggregate->sales ?? 0),
                    'expenditure' => trim_zeros($aggregate->expenditure ?? 0),
                ];
            }),
        ]);
    }

    /**
     * 门店统计
     */
    public function stores(Request $request, StatisticService $statisticService)
    {
        $request->validate(
            rules: [
                'start_at' => ['bail', 'required', 'date_format:Y-m-d'],
                'end_at' => ['bail', 'required', 'date_format:Y-m-d'],
            ],
            attributes: [
                'start_at' => '开始日期',
                'end_at' => '结束日期',
            ],
        );

        $input = array_merge(
            $this->filterInput($request),
            $request->only(['start_at', 'end_at']),
        );

        return $statisticService->storeRanking($input);
    }

    /**
     * 销售统计
     */
    public function sales(Request $request, StatisticService $statisticService): array
    {
        $request->validate(
            rules: [
                'start_at' => ['bail', 'required', 'date_format:Y-m-d'],
                'end_at' => ['bail', 'required', 'date_format:Y-m-d'],
            ],
            attributes: [
                'start_at' => '开始日期',
                'end_at' => '结束日期',
            ],
        );

        return $statisticService->sales(
            Carbon::parse($request->input('start_at')),
            Carbon::parse($request->input('end_at')),
            $this->filterInput($request),
        );
    }

    /**
     * 处理区域和门店过滤条件
     */
    protected function filterInput(Request $request): array
    {
        $input = Arr::except($request->input(), ['store_id', 'province_code', 'city_code']);

        if ($request->filled('store_id')) {
            $input['store_id'] = $request->input('store_id');
        } elseif ($request->anyFilled(['province_code', 'city_code'])) {
            $region = [];

            $provinceCode = (string) $request->input('province_code');
            if ($provinceCode !== '') {
                $region['provinceCode'] = $provinceCode;
            }

            $cityCode = (string) $request->input('city_code');
            if ($cityCode !== '') {
                $region['cityCode'] = $provinceCode;
            }

            $input['region'] = $region;
        }

        return $input;
    }
}