<?php

declare(strict_types=1);

namespace plugin\produce\app\service\admin;

use Illuminate\Database\Query\Builder;
use plugin\produce\app\model\ExceptionRecord;

class ExceptionAnalysisService
{
    public function overview(array $params): array
    {
        $query = $this->query($params);

        return [
            'total' => (clone $query)->count(),
            'pending' => (clone $query)->where('status', 0)->count(),
            'processing' => (clone $query)->where('status', 1)->count(),
            'completed' => (clone $query)->where('status', 2)->count(),
            'by_type' => $this->group($params, 'type_code', 'type_name'),
            'by_reason' => $this->group($params, 'reason_code', 'reason_name'),
            'by_issue' => $this->group($params, 'issue_code', 'issue_name'),
            'by_date' => $this->byDate($params),
        ];
    }

    private function group(array $params, string $codeColumn, string $nameColumn): array
    {
        return $this->query($params)
            ->selectRaw("{$codeColumn} as code, {$nameColumn} as name, COUNT(*) as total")
            ->groupBy($codeColumn, $nameColumn)
            ->orderByDesc('total')
            ->orderBy($nameColumn)
            ->limit(20)
            ->get()
            ->map(static fn (object $item): array => [
                'code' => (string) $item->code,
                'name' => (string) $item->name,
                'total' => (int) $item->total,
            ])
            ->all();
    }

    private function byDate(array $params): array
    {
        $model = new ExceptionRecord();
        $connection = $model->getConnection();
        $table = $connection->getTablePrefix() . $model->getTable();

        return $this->query($params)
            ->selectRaw("DATE_FORMAT(FROM_UNIXTIME({$table}.reported_at), '%Y-%m-%d') as date, COUNT(*) as total")
            ->groupBy('date')
            ->orderBy('date')
            ->get()
            ->map(static fn (object $item): array => [
                'date' => (string) $item->date,
                'total' => (int) $item->total,
            ])
            ->all();
    }

    private function query(array $params): Builder
    {
        $model = new ExceptionRecord();
        $query = $model->getConnection()->table($model->getTable())->whereNull('deleted_at');

        foreach (['type_code', 'reason_code', 'issue_code', 'status'] as $field) {
            if (($params[$field] ?? '') !== '') {
                $query->where($field, $params[$field]);
            }
        }

        if (!empty($params['reported_at_range']) && is_array($params['reported_at_range']) && count($params['reported_at_range']) === 2) {
            $query->whereBetween('reported_at', [
                strtotime((string) $params['reported_at_range'][0] . ' 00:00:00'),
                strtotime((string) $params['reported_at_range'][1] . ' 23:59:59'),
            ]);
        } else {
            $query->whereBetween('reported_at', [strtotime('-29 days 00:00:00'), time()]);
        }

        return $query;
    }
}