<?php

namespace App\Http\Controllers\Api;

use App\Models\Ledger;
use Illuminate\Http\Request;

class StatsController extends Controller
{
    /**
     * 30天内的销售金额和支出金额趋势图（不含当日）
     */
    public function trendsOver30days(Request $request)
    {
        /** @var \App\Models\Employee */
        $employee = $request->user();

        $start = now()->subDays(30);
        $end = $start->copy()->addDays(29);

        /** @var \Illuminate\Database\Eloquent\Collection */
        $ledgers = Ledger::select(['date', 'sales', 'expenditure'])
            ->whereBetween('date', [$start->format('Y-m-d'), $end->format('Y-m-d')])
            ->when(
                $employee->isAdministrator(),
                function ($query) use ($request) {
                    if ($request->filled('store_id')) {
                        return $query->where('store_id', $request->input('store_id'));
                    }

                    if (! $request->anyFilled(['province_code', 'city_code'])) {
                        return;
                    }

                    $query->whereHas('store', function ($query) use ($request) {
                        $request->whenFilled('province_code', fn ($code) => $query->where('region->provinceCode', $code));
                        $request->whenFilled('city_code', fn ($code) => $query->where('region->cityCode', $code));
                    });
                },
                fn ($query) => $query->where('store_id', $employee->store_id ?: 0),
            )
            ->get()
            ->keyBy('date');

        $data = [];

        do {
            $ledger = $ledgers->get(
                $date = $start->format('Y-m-d')
            );

            $data[] = [
                'date' => $date,
                'sales' => trim_zeros($ledger->sales ?? 0),
                'expenditure' => trim_zeros($ledger->expenditure ?? 0),
            ];

            $start->addDay();
        } while ($start->lte($end));

        return $data;
    }
}