<?php

namespace Modules\EcommerceFinance\Repositories;

use Illuminate\Database\ConnectionInterface;
use Illuminate\Support\Facades\Schema;
use Modules\EcommerceFinance\Services\DingPayableWorkflowStatus;
use RuntimeException;

/**
 * 线上代发业务报销流程的共享镜像读取与按商品ID关联。
 *
 * 数据由 DingPayableWorkflowMirrorSynchronizer（ding_online_daifa_price 配置）
 * 从钉钉 OA 审批同步到 ding_online_daifa_price_mirror 宽表。本仓库只在镜像库
 * 读取，并依据 商品ID（product_id）关联共享业务镜像的商品目录，页面不直连上游。
 */
class DingOnlineDaifaPriceMirrorRepository
{
    public const DATASET_KEY = 'operations_replica.rpt.ding_online_daifa_price';

    public const TARGET_TABLE = 'ding_online_daifa_price_mirror';

    private readonly ConnectionInterface $connection;

    public function __construct(GenericBusinessMirrorRepository $mirror)
    {
        $this->connection = $mirror->connection();
    }

    public function ready(): bool
    {
        $schema = Schema::connection($this->connection->getName());
        if (! $schema->hasTable(self::TARGET_TABLE) || ! $schema->hasTable('business_mirror_table_states')) {
            return false;
        }

        $state = $this->connection->table('business_mirror_table_states')
            ->where('dataset_key', self::DATASET_KEY)->first();

        return $state !== null && $state->initial_completed_at !== null;
    }

    /** @return array{data:list<array<string,mixed>>,total:int,status:string,last_synced_at:?string,summary:array<string,mixed>} */
    public function paginate(array $filters, int $page, int $perPage): array
    {
        if (! $this->ready()) {
            throw new RuntimeException('business_mirror_dataset_not_ready');
        }

        $page = max($page, 1);
        $perPage = min(max($perPage, 1), 100);
        $state = $this->connection->table('business_mirror_table_states')->where('dataset_key', self::DATASET_KEY)->first();

        // 计数/分页/合计一律走 SQL，只取当前页的行，避免把整表读入内存（大数据量会拖垮页面）。
        // 状态过滤：镜像在同步阶段按 only_status 只写入指定状态（当前=已完成）；状态派生自
        // 表单 JSON、非独立列，无法用 SQL 过滤，因此请求的状态若与同步保留状态不同则结果为空，
        // 否则全部行都符合、无需再过滤。
        $onlyStatus = strtoupper(trim((string) config('upstream_mirrors.ding_online_daifa_price.only_status', '')));
        $statusFilter = strtoupper(trim((string) ($filters['status'] ?? '')));
        $mismatchStatus = $statusFilter !== '' && $onlyStatus !== '' && $statusFilter !== $onlyStatus;

        $applyFilters = function ($query) use ($filters): void {
            if (($filters['product_id'] ?? '') !== '') {
                $query->where('product_id', (string) $filters['product_id']);
            }
            if (($filters['shop_name'] ?? '') !== '') {
                $query->where('shop_name', (string) $filters['shop_name']);
            }
            if (($filters['keyword'] ?? '') !== '') {
                $keyword = (string) $filters['keyword'];
                $query->where(function ($q) use ($keyword): void {
                    $q->where('process_instance_id', 'like', '%' . $keyword . '%')
                        ->orWhere('daifa_trade_no', 'like', '%' . $keyword . '%')
                        ->orWhere('shop_trade_no', 'like', '%' . $keyword . '%');
                });
            }
            if (($filters['created_from'] ?? '') !== '') {
                $query->where('workflow_created_at', '>=', (string) $filters['created_from']);
            }
            if (($filters['created_to'] ?? '') !== '') {
                $query->where('workflow_created_at', '<', (string) $filters['created_to'] . ' 99:99:99');
            }
        };

        $countQuery = $this->connection->table(self::TARGET_TABLE);
        $applyFilters($countQuery);
        $total = $mismatchStatus ? 0 : (int) $countQuery->count();

        $summary = ['count' => 0, 'matched_count' => 0, 'daifa_amount' => 0.0, 'paid_amount' => 0.0, 'price_diff' => 0.0];
        if (! $mismatchStatus) {
            $summaryQuery = $this->connection->table(self::TARGET_TABLE);
            $applyFilters($summaryQuery);
            $agg = $summaryQuery->selectRaw(
                'COUNT(*) AS c, '
                . "SUM(CASE WHEN product_id IS NOT NULL AND product_id <> '' THEN 1 ELSE 0 END) AS mc, "
                . 'COALESCE(SUM(daifa_amount), 0) AS da, '
                . 'COALESCE(SUM(paid_amount), 0) AS pa, '
                . 'COALESCE(SUM(price_diff), 0) AS pd'
            )->first();
            $summary = [
                'count' => (int) ($agg->c ?? 0),
                'matched_count' => (int) ($agg->mc ?? 0),
                'daifa_amount' => round((float) ($agg->da ?? 0), 2),
                'paid_amount' => round((float) ($agg->pa ?? 0), 2),
                'price_diff' => round((float) ($agg->pd ?? 0), 2),
            ];
        }

        $pageRows = [];
        if (! $mismatchStatus) {
            $pageQuery = $this->connection->table(self::TARGET_TABLE);
            $applyFilters($pageQuery);
            $pageRows = $pageQuery
                ->orderByDesc('workflow_created_at')
                ->orderByDesc('process_instance_id')
                ->orderByDesc('detail_index')
                ->forPage($page, $perPage)
                ->get();
        }

        $data = [];
        foreach ($pageRows as $row) {
            $workflow = $this->decode((string) $row->workflow_payload, []);
            $productId = (string) ($row->product_id ?? '');
            // 商品名称已在同步阶段按 商品ID 关联商品目录并写入镜像宽表 product_name 列，
            // 页面直接读取，避免对 2500 万行的 ops_jst_sku_map 做临时 JOIN 导致超时。
            $resolvedName = $this->cleanName($row->product_name ?? null);
            $product = $productId !== '' && $resolvedName !== null
                ? ['matched' => true, 'name' => $resolvedName, 'sku_id' => null, 'i_id' => null]
                : ['matched' => false, 'name' => null, 'sku_id' => null, 'i_id' => null];
            $data[] = [
                'process_instance_id' => (string) $row->process_instance_id,
                'detail_index' => (int) $row->detail_index,
                'product_id' => $productId,
                'daifa_trade_no' => (string) ($row->daifa_trade_no ?? ''),
                'shop_trade_no' => (string) ($row->shop_trade_no ?? ''),
                'shop_name' => (string) ($row->shop_name ?? ''),
                'payee_name' => (string) ($row->payee_name ?? ''),
                // 标签：收款人为宁波顾家望业家居有限公司 => 刘萧代发；其余 => 1688代发。
                'tag' => ((string) ($row->payee_name ?? '')) === '宁波顾家望业家居有限公司' ? '刘萧代发' : '1688代发',
                'supplier_name' => (string) ($row->supplier_name ?? ''),
                'material_no' => (string) ($row->material_no ?? ''),
                'ship_qty' => $row->ship_qty === null ? null : (int) $row->ship_qty,
                'paid_amount' => $row->paid_amount === null ? null : (float) $row->paid_amount,
                'daifa_amount' => $row->daifa_amount === null ? null : (float) $row->daifa_amount,
                'price_diff' => $row->price_diff === null ? null : (float) $row->price_diff,
                'workflow' => $workflow,
                'scheme' => $this->decode((string) ($row->scheme_payload ?? '[]'), []),
                'tasks' => $this->decode((string) ($row->task_payload ?? '[]'), []),
                'status_key' => DingPayableWorkflowStatus::key($workflow),
                'status_label' => DingPayableWorkflowStatus::label($workflow),
                'matched_product' => $product,
                'workflow_created_at' => (string) ($row->workflow_created_at ?? ''),
            ];
        }

        return [
            'data' => $data,
            'total' => $total,
            'status' => (string) ($state->status ?? 'unknown'),
            'last_synced_at' => $state->last_succeeded_at ? (string) $state->last_succeeded_at : null,
            'summary' => $summary,
        ];
    }

    /** @param list<object> $rows */
    private function summary(array $rows): array
    {
        $daifa = 0.0;
        $paid = 0.0;
        $diff = 0.0;
        $matched = 0;
        foreach ($rows as $row) {
            $daifa += (float) ($row->daifa_amount ?? 0);
            $paid += (float) ($row->paid_amount ?? 0);
            $diff += (float) ($row->price_diff ?? 0);
            if (! empty($row->product_id)) {
                $matched++;
            }
        }
        return [
            'count' => count($rows),
            'matched_count' => $matched,
            'daifa_amount' => round($daifa, 2),
            'paid_amount' => round($paid, 2),
            'price_diff' => round($diff, 2),
        ];
    }

    private function cleanName(mixed $value): ?string
    {
        if ($value === null) {
            return null;
        }
        $name = trim((string) $value);
        return $name === '' ? null : $name;
    }

    private function decode(string $json, mixed $fallback): mixed
    {
        if ($json === '') {
            return $fallback;
        }
        $decoded = json_decode($json, true);
        return is_array($decoded) ? $decoded : $fallback;
    }
}