<?php
declare(strict_types=1);
namespace plugin\saiadmin\app\service;

use plugin\saiadmin\app\model\water\{WaterModel, WaterContent, WaterPackage};
use plugin\saiadmin\app\service\content\{ContentInput, ContentPolicy};
use plugin\saiadmin\exception\ApiException;

/** Administrative content queries and simulated audience preview, not a public mobile API. */
final class WaterContentDashboard
{
    private readonly string $now;

    public function __construct(?\DateTimeImmutable $now = null)
    {
        $this->now = ($now ?? new \DateTimeImmutable())->setTimezone(new \DateTimeZone('Asia/Shanghai'))->format('Y-m-d H:i:s');
    }

    private function present(array $row): array
    {
        foreach (['id', 'sort', 'status'] as $field) $row[$field] = (int)$row[$field];
        $row['delivery_status'] = ContentPolicy::status($row, $this->now);
        $row['status_label'] = ContentPolicy::LABELS[$row['delivery_status']];
        return $row;
    }

    private function packages(): array
    {
        return WaterPackage::query()->alias('p')->join('sa_water_sku as s', 's.id', '=', 'p.sku_id')
            ->where('p.status', 1)->where('s.status', 1)->orderByDesc('p.id')->limit(3)
            ->get(['p.id', 'p.name', 'p.buckets', 'p.price_cents', 's.name as sku_name'])
            ->map(function ($row) {
                $data = $row->toArray();
                foreach (['id', 'buckets', 'price_cents'] as $field) $data[$field] = (int)$data[$field];
                return $data;
            })->all();
    }

    public function dashboard(array $input): array
    {
        $keyword = ContentInput::text($input, 'keyword', 120);
        $status = ContentInput::text($input, 'status', 20);
        if ($status !== '' && !isset(ContentPolicy::LABELS[$status])) throw new ApiException('投放状态不正确');
        $page = ContentInput::integer($input, 'page', 1, 1, 1000000);
        $limit = ContentInput::integer($input, 'limit', 8, 1, 100);
        return WaterModel::transaction(function () use ($keyword, $status, $page, $limit) {
            $query = ContentPolicy::filter(WaterContent::query(), $status, $this->now);
            if ($keyword !== '') $query->matching('title|region', '%'.$keyword.'%');
            $list = $query->orderByDesc('sort')->orderByDesc('id')->pageResult($page, $limit);
            $list['data'] = array_map($this->present(...), $list['data']);
            $summary = ['total' => WaterContent::query()->count()];
            foreach (ContentPolicy::LABELS as $key => $label) {
                $summary[$key] = ContentPolicy::filter(WaterContent::query(), $key, $this->now)->count();
            }
            return ['list' => $list, 'summary' => $summary, 'packages' => $this->packages(), 'updated_at' => $this->now];
        });
    }

    public function preview(array $input): array
    {
        $purchase = ContentInput::text($input, 'purchase_status', 20, 'new');
        if (!in_array($purchase, ['new', 'purchased'], true)) throw new ApiException('预览购水状态不正确');
        $admin = ContentInput::integer($input, 'is_enterprise_admin', 0, 0, 1);
        $region = ContentInput::text($input, 'region', 80);
        if ($region === '全国') $region = '';
        $audiences = ['all', $purchase];
        if ($admin) $audiences[] = 'enterprise_admin';
        return WaterModel::transaction(function () use ($purchase, $admin, $region, $audiences) {
            $query = ContentPolicy::filter(WaterContent::query(), 'active', $this->now)
                ->whereIn('audience', $audiences)
                ->where(fn ($q) => $q->whereNull('region')->orWhere('region', '')->orWhere('region', '全国')->orWhere('region', $region));
            $total = (clone $query)->count();
            $rows = $query->orderByDesc('sort')->orderByDesc('id')->limit(20)->get()->toArray();
            return ['banners' => array_map($this->present(...), $rows), 'total' => $total,
                'packages' => $this->packages(), 'context' => ['purchase_status' => $purchase, 'is_enterprise_admin' => $admin, 'region' => $region],
                'updated_at' => $this->now];
        });
    }
}