<?php

namespace App\Console\Commands;

use Carbon\CarbonImmutable;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\File;

/**
 * 固定月度顺序：先生成商品月加权平均单价，再同步商品成本表。
 */
class AutoMonthlyWeightedAverageAndProductCost extends Command
{
    protected $signature = 'finance:monthly-weighted-product-cost:auto
        {--month= : 指定月份；默认取最新已成功的进销存月份}
        {--result-json= : 将两阶段结果写入指定 JSON 文件}';

    protected $description = '先计算商品月加权平均单价，再自动同步商品成本表';

    public function handle(): int
    {
        $connection = (string) config('upstream_mirrors.connection', 'business_mirror');
        $month = $this->targetMonth($connection);
        if ($month === null) {
            return $this->writeResult([
                'status' => 'blocked',
                'message' => '未找到已成功导入的进销存月份。',
            ]);
        }

        $weightedPath = tempnam(sys_get_temp_dir(), 'weighted-result-') . '.json';
        $costPath = tempnam(sys_get_temp_dir(), 'product-cost-result-') . '.json';
        try {
            $weightedExit = $this->call('product:monthly-weighted-average:auto', [
                '--month' => $month->format('Y-m'),
                '--result-json' => $weightedPath,
            ]);
            $weighted = $this->readJson($weightedPath);
            if (
                $weightedExit !== self::SUCCESS
                || in_array($weighted['status'] ?? 'failed', ['blocked', 'failed'], true)
            ) {
                return $this->writeResult([
                    'status' => 'failed',
                    'report_month' => $month->toDateString(),
                    'message' => '商品月加权平均单价未完成，商品成本未执行。',
                    'weighted_average' => $weighted,
                    'product_cost' => null,
                ]);
            }

            $costExit = $this->call('store-receipt:product-cost:sync', [
                'month' => $month->format('Y-m'),
                '--result-json' => $costPath,
            ]);
            $cost = $this->readJson($costPath);
            $status = $costExit !== self::SUCCESS
                ? 'failed'
                : ((int) ($cost['pending_cost_rows'] ?? 0) > 0 ? 'review_required' : 'success');

            return $this->writeResult([
                'status' => $status,
                'report_month' => $month->toDateString(),
                'message' => match ($status) {
                    'success' => '月加权平均单价与商品成本已按顺序完成。',
                    'review_required' => '月加权平均单价与商品成本已完成，存在待核验成本。',
                    default => '商品成本同步失败。',
                },
                'weighted_average' => $weighted,
                'product_cost' => $cost,
            ]);
        } finally {
            @unlink($weightedPath);
            @unlink($costPath);
        }
    }

    private function targetMonth(string $connection): ?CarbonImmutable
    {
        $requested = trim((string) $this->option('month'));
        if ($requested !== '') {
            return CarbonImmutable::parse($requested)->startOfMonth();
        }

        $latest = DB::connection($connection)->table('inventory_report_authoritative_months')
            ->where('dataset_key', 'jiansun.inventory-report.authoritative-month')
            ->where('status', 'succeeded')
            ->whereNotNull('active_generation')
            ->orderByDesc('source_month')
            ->value('source_month');

        return $latest === null ? null : CarbonImmutable::parse((string) $latest)->startOfMonth();
    }

    /** @return array<string,mixed> */
    private function readJson(string $path): array
    {
        if (! is_file($path)) {
            return ['status' => 'failed', 'message' => '子任务未生成结果文件。'];
        }

        $decoded = json_decode((string) file_get_contents($path), true);

        return is_array($decoded)
            ? $decoded
            : ['status' => 'failed', 'message' => '子任务结果文件无法解析。'];
    }

    /** @param array<string,mixed> $result */
    private function writeResult(array $result): int
    {
        $path = trim((string) $this->option('result-json'));
        if ($path !== '') {
            File::ensureDirectoryExists(dirname($path));
            File::put(
                $path,
                json_encode(
                    $result,
                    JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT,
                ) . PHP_EOL,
            );
        }

        if (isset($result['message'])) {
            $this->line((string) $result['message']);
        }

        return in_array($result['status'] ?? 'failed', ['success', 'review_required'], true)
            ? self::SUCCESS
            : self::FAILURE;
    }
}