<?php

namespace Modules\EcommerceFinance\View;

use App\Http\Controllers\Business\PayablesFinalActions;
use App\Services\Auth\SupplierPortalAccess;
use Modules\EcommerceFinance\Services\SupplierDingTalkNotifier;
use Modules\EcommerceFinance\Services\SupplierPayableOverrideStore;
use Modules\EcommerceFinance\Services\SupplierReturnAccounting;
use Modules\EcommerceFinance\Services\SupplierReturnConfirmation;
use Modules\EcommerceFinance\Services\SupplierStatementMatcher;
use Modules\EcommerceFinance\Services\SupplierStatementStore;

/**
 * 「供应商对账」页面数据：
 * - 财务端数据：按供应商汇总 + 行级差异（采购单号 + 日期 + 条码匹配，四类结果带结算口径）
 * - 厂家端数据：厂家上传的对账单（实时）与只读的退货明细
 */
class SupplierReconciliationPageData
{
    /** 厂家上传的对账数据表：每页行数（短表 + 翻页）。 */
    private const PER_PAGE = 15;

    /** 退货明细行较高：每页 10 行，并在页面内固定表头滚动查看。 */
    private const RETURN_PER_PAGE = 10;

    /** 财务端比对明细：每页 15 条。 */
    private const COMPARISON_PER_PAGE = 15;

    public function __construct(
        private readonly SupplierPayableOverrideStore $store,
        private readonly SupplierStatementStore $statements,
        private readonly SupplierStatementMatcher $matcher,
        private readonly SupplierReturnConfirmation $returnConfirmations,
        private readonly SupplierDingTalkNotifier $dingTalkNotifier,
        private readonly SupplierReturnAccounting $returnAccounting,
        private readonly SupplierPortalAccess $supplierPortalAccess,
    ) {
    }

    /** @return array<string,mixed> */
    public function financeData(): array
    {
        $companyId = $this->companyId();
        $mine = $this->store->listRows(
            PayablesFinalActions::DATASET_PREFIX . 'supplier:payment-reconciliation',
            $companyId,
        );

        $months = [];
        foreach ($mine as $row) {
            $month = substr(trim((string) ($row['summary_month'] ?? '')), 0, 7);
            if ($month !== '') {
                $months[$month] = true;
            }
        }
        $months = array_keys($months);
        rsort($months);

        $month = trim((string) request()->query('month', ''));
        if ($month !== '' && preg_match('/^\d{4}-\d{2}$/', $month) === 1) {
            $mine = array_values(array_filter(
                $mine,
                static fn (array $row): bool => substr(trim((string) ($row['summary_month'] ?? '')), 0, 7) === $month,
            ));
        } else {
            $month = '';
        }

        $reconcilers = [];
        foreach ($mine as $row) {
            $name = trim((string) ($row['reconciler'] ?? ''));
            if ($name !== '') {
                $reconcilers[$name] = true;
            }
        }
        $reconcilers = array_keys($reconcilers);
        sort($reconcilers);

        $reconciler = trim((string) request()->query('reconciler', ''));
        if ($reconciler !== '') {
            $mine = array_values(array_filter(
                $mine,
                static fn (array $row): bool => trim((string) ($row['reconciler'] ?? '')) === $reconciler,
            ));
        }

        $suppliers = [];
        foreach ($mine as $row) {
            $name = trim((string) ($row['supplier'] ?? ''));
            if ($name !== '') {
                $suppliers[$name] = true;
            }
        }
        foreach ($this->statements->uploadedSuppliers($companyId) as $name) {
            $suppliers[$name] = true;
        }
        foreach ($this->store->listRows(
            PayablesFinalActions::DATASET_PREFIX . 'supplier:return-reconciliation',
            $companyId,
        ) as $row) {
            $name = trim((string) ($row['supplier'] ?? ''));
            if ($name !== '') {
                $suppliers[$name] = true;
            }
        }
        $supplierNames = array_keys($suppliers);
        sort($supplierNames);

        $uploads = [];
        foreach ($supplierNames as $name) {
            $latest = $this->statements->uploads($name, $companyId, 1);
            $uploads[$name] = $latest[0] ?? null;
        }

        // 选中厂家时页面切换成「比对明细」视图（列表不再渲染，避免 100+ 家时往下翻）。
        $supplierQuery = trim((string) request()->query('supplier', ''));
        $selected = in_array($supplierQuery, $supplierNames, true) ? $supplierQuery : '';
        $supplierNotFound = $supplierQuery !== '' && $selected === '';
        $detail = null;
        if ($selected !== '') {
            $detail = $this->detail($mine, $selected, $companyId);
            $totalRows = count($detail['rows']);
            $pages = max((int) ceil($totalRows / self::COMPARISON_PER_PAGE), 1);
            $currentPage = min(max((int) request()->query('compare_page', 1), 1), $pages);
            $detail['total_rows'] = $totalRows;
            $detail['page'] = $currentPage;
            $detail['pages'] = $pages;
            $detail['per_page'] = self::COMPARISON_PER_PAGE;
            $detail['rows'] = array_slice(
                $detail['rows'],
                ($currentPage - 1) * self::COMPARISON_PER_PAGE,
                self::COMPARISON_PER_PAGE,
            );
        }

        return [
            'view' => 'business.pages.supplier-reconciliation.finance-data',
            'supplierNames' => $supplierNames,
            'supplierQuery' => $supplierQuery,
            'supplierNotFound' => $supplierNotFound,
            'uploads' => $uploads,
            'months' => $months,
            'month' => $month,
            'reconcilers' => $reconcilers,
            'reconciler' => $reconciler,
            'selectedSupplier' => $selected,
            'detail' => $detail,
            'financeReturnPanel' => $detail !== null
                ? $this->financeReturnPanel($selected, $companyId, $month, $reconciler)
                : null,
            'robot' => $selected !== '' ? $this->dingTalkNotifier->configuration($selected) : null,
            'listUrl' => route('business.pages.show', array_filter([
                'section' => 'supplier-reconciliation',
                'page' => 'finance-data',
                'month' => $month,
                'reconciler' => $reconciler,
            ], static fn (mixed $value): bool => $value !== '' && $value !== null)),
            'statementTemplateUrl' => route('business.supplier-reconciliation.template'),
            'uploadUrl' => route('business.supplier-reconciliation.statement.upload'),
        ];
    }

    /** @return array<string,mixed> */
    public function supplierData(): array
    {
        $companyId = $this->companyId();
        $portalUser = request()->user();
        $supplierLocked = $portalUser && SupplierPortalAccess::isSupplierUser($portalUser);
        $supplierNames = [];
        $supplierNotFound = false;

        if ($supplierLocked) {
            $selected = $this->supplierPortalAccess->supplierFor($portalUser);
            abort_if(! $selected, 403, '当前钉钉账号未绑定有效供应商，请联系财务人员。');
            $supplierQuery = $selected;
        } else {
            $mine = $this->store->listRows(
                PayablesFinalActions::DATASET_PREFIX . 'supplier:payment-reconciliation',
                $companyId,
            );
            $suppliers = [];
            foreach ($mine as $row) {
                $name = trim((string) ($row['supplier'] ?? ''));
                if ($name !== '') {
                    $suppliers[$name] = true;
                }
            }
            foreach ($this->statements->uploadedSuppliers($companyId) as $name) {
                $suppliers[$name] = true;
            }
            foreach ($this->store->listRows(
                PayablesFinalActions::DATASET_PREFIX . 'supplier:return-reconciliation',
                $companyId,
            ) as $row) {
                $name = trim((string) ($row['supplier'] ?? ''));
                if ($name !== '') {
                    $suppliers[$name] = true;
                }
            }
            $supplierNames = array_keys($suppliers);
            sort($supplierNames);

            $supplierQuery = trim((string) request()->query('supplier', ''));
            $selected = in_array($supplierQuery, $supplierNames, true) ? $supplierQuery : '';
            $supplierNotFound = $supplierQuery !== '' && $selected === '';
            if ($supplierQuery === '') {
                $selected = $supplierNames[0] ?? '';
            }
        }

        $page = max((int) request()->query('rows_page', 1), 1);
        $statementRows = $selected !== '' ? $this->statements->rows($selected, $companyId) : [];
        $returnData = $selected !== ''
            ? $this->returnPanelData($selected, $companyId, request()->query())
            : ['returnPanel' => null, 'returnWarehouses' => []];

        return [
            'view' => 'business.pages.supplier-reconciliation.supplier-data',
            'supplierNames' => $supplierNames,
            'supplierQuery' => $supplierQuery,
            'supplierNotFound' => $supplierNotFound,
            'selectedSupplier' => $selected,
            'supplierLocked' => $supplierLocked,
            'uploads' => $selected !== '' ? $this->statements->uploads($selected, $companyId) : [],
            'statementRows' => array_slice($statementRows, ($page - 1) * self::PER_PAGE, self::PER_PAGE),
            'statementTotal' => count($statementRows),
            'returnPanel' => $returnData['returnPanel'],
            'returnWarehouses' => $returnData['returnWarehouses'],
            'rowsPage' => $page,
            'perPage' => self::PER_PAGE,
            'statementTemplateUrl' => route('business.supplier-reconciliation.template'),
            'uploadUrl' => route('business.supplier-reconciliation.statement.upload'),
            'returnConfirmUrl' => route('business.supplier-reconciliation.return.confirm'),
            'returnDisputeUrl' => route('business.supplier-reconciliation.return.dispute'),
            'returnConfirmAllUrl' => route('business.supplier-reconciliation.return.confirm-all'),
        ];
    }

    /**
     * 厂家门户只读取当前登录联系人绑定的供应商数据。
     *
     * @return array<string,mixed>
     */
    public function portalData(string $supplier, int $companyId): array
    {
        $page = max((int) request()->query('rows_page', 1), 1);
        $statementRows = $this->statements->rows($supplier, $companyId);
        $returnData = $this->returnPanelData($supplier, $companyId, request()->query());

        return [
            'statementRows' => array_slice($statementRows, ($page - 1) * self::PER_PAGE, self::PER_PAGE),
            'statementTotal' => count($statementRows),
            'uploads' => $this->statements->uploads($supplier, $companyId),
            'returnPanel' => $returnData['returnPanel'],
            'returnWarehouses' => $returnData['returnWarehouses'],
            'rowsPage' => $page,
            'perPage' => self::PER_PAGE,
        ];
    }

    /**
     * 按页面当前月份/对账人筛选重新计算财务端比对结果，供差异推送使用。
     *
     * @param  array<string,mixed>  $input
     * @return array<string,mixed>
     */
    public function financeDetailForFilters(string $supplier, int $companyId, array $input): array
    {
        $mine = $this->store->listRows(
            PayablesFinalActions::DATASET_PREFIX . 'supplier:payment-reconciliation',
            $companyId,
        );

        $month = $this->filterText($input['month'] ?? '');
        if ($month !== '' && preg_match('/^\d{4}-\d{2}$/', $month) === 1) {
            $mine = array_values(array_filter(
                $mine,
                static fn (array $row): bool => substr(trim((string) ($row['summary_month'] ?? '')), 0, 7) === $month,
            ));
        }

        $reconciler = $this->filterText($input['reconciler'] ?? '');
        if ($reconciler !== '') {
            $mine = array_values(array_filter(
                $mine,
                static fn (array $row): bool => trim((string) ($row['reconciler'] ?? '')) === $reconciler,
            ));
        }

        return $this->detail($mine, $supplier, $companyId);
    }

    /**
     * 财务端比对页的退货面板：与厂家端使用同一终版数据集，并保留月份/对账人筛选。
     *
     * @return array<string,mixed>
     */
    private function financeReturnPanel(
        string $supplier,
        int $companyId,
        string $month,
        string $reconciler,
    ): array {
        $allRows = $this->returnRows($supplier, $companyId);
        $statuses = $this->returnConfirmations->statuses($supplier, $companyId);
        $rows = [];

        foreach ($allRows as $row) {
            $rowMonth = substr(trim((string) ($row['send_time'] ?? '')), 0, 7);
            if ($rowMonth === '') {
                $rowMonth = substr(trim((string) ($row['summary_month'] ?? '')), 0, 7);
            }
            if ($month !== '' && $rowMonth !== $month) {
                continue;
            }
            if ($reconciler !== '' && trim((string) ($row['reconciler'] ?? '')) !== $reconciler) {
                continue;
            }

            $row['_status'] = $statuses[(string) ($row['_action_key'] ?? '')] ?? '';
            $rows[] = $row;
        }

        return $this->returnConfirmationPanel(
            $supplier,
            $rows,
            $this->returnFilters([]),
            count($allRows),
            'finance_return_page',
        );
    }

    /**
     * @param  array<string,mixed>  $input
     * @return array{returnPanel:array<string,mixed>,returnWarehouses:list<string>}
     */
    private function returnPanelData(string $supplier, int $companyId, array $input): array
    {
        $allReturnRows = $this->returnRows($supplier, $companyId);
        $returnWarehouses = [];
        foreach ($allReturnRows as $row) {
            $warehouse = $this->filterText($row['warehouse'] ?? '');
            if ($warehouse !== '') {
                $returnWarehouses[$warehouse] = true;
            }
        }
        $returnWarehouses = array_keys($returnWarehouses);
        sort($returnWarehouses, SORT_NATURAL | SORT_FLAG_CASE);

        $filters = $this->returnFilters($input);
        $returnRows = $this->filterReturnRows(
            $allReturnRows,
            $filters,
            $this->returnConfirmations->statuses($supplier, $companyId),
        );

        return [
            'returnPanel' => $this->returnConfirmationPanel($supplier, $returnRows, $filters, count($allReturnRows)),
            'returnWarehouses' => $returnWarehouses,
        ];
    }

    /**
     * 退货扣减确认面板：按筛选结果汇总并分页，保留导入顺序。
     *
     * @param  list<array<string,mixed>>  $returnRows
     * @param  array{keyword:string,date_from:string,date_to:string,warehouse:string,status:string}  $filters
     * @return array<string,mixed>
     */
    private function returnConfirmationPanel(
        string $supplier,
        array $returnRows,
        array $filters,
        int $allRows,
        string $pageQueryKey = 'return_page',
    ): array
    {
        $total = 0.0;
        $confirmedAmount = 0.0;
        $disputedAmount = 0.0;
        $returnQuantity = 0.0;
        $confirmedQuantity = 0.0;
        $disputedQuantity = 0.0;
        $disputedCount = 0;
        $confirmedCount = 0;

        $rows = [];
        foreach ($returnRows as $row) {
            $row = $this->returnAccounting->enrich($row);
            $key = (string) ($row['_action_key'] ?? '');
            $deduction = $row['_accounting_target'] === '不记账'
                ? 0.0
                : (float) $row['_supplier_amount'];
            $quantity = (float) $row['_supplier_qty'];
            $status = (string) ($row['_status'] ?? '');

            $total += $deduction;
            $returnQuantity += $quantity;
            if ($status === SupplierReturnConfirmation::STATUS_CONFIRMED) {
                $confirmedAmount += $deduction;
                $confirmedQuantity += $quantity;
                $confirmedCount++;
            } elseif ($status === SupplierReturnConfirmation::STATUS_DISPUTED) {
                $disputedAmount += $deduction;
                $disputedQuantity += $quantity;
                $disputedCount++;
            }

            $rows[] = ['_key' => $key, 'status' => $status, 'deduction' => $deduction] + $row;
        }

        // 全部退货行按导入顺序分页展示（每页 10 行），不做金额排序。
        $perPage = self::RETURN_PER_PAGE;
        $pages = max((int) ceil(count($rows) / $perPage), 1);
        $page = min(max((int) request()->query($pageQueryKey, 1), 1), $pages);

        $filterQuery = $this->returnFilterQuery($filters);

        return [
            'supplier' => $supplier,
            'rows' => array_slice($rows, ($page - 1) * $perPage, $perPage),
            'page' => $page,
            'pages' => $pages,
            'per_page' => $perPage,
            'total_rows' => count($returnRows),
            'all_rows' => $allRows,
            'total_amount' => round($total, 2),
            'return_qty' => round($returnQuantity, 2),
            'confirmed_qty' => round($confirmedQuantity, 2),
            'disputed_qty' => round($disputedQuantity, 2),
            'pending_qty' => round(max($returnQuantity - $confirmedQuantity - $disputedQuantity, 0), 2),
            'pending_amount' => round(max($total - $confirmedAmount - $disputedAmount, 0), 2),
            'confirmed_count' => $confirmedCount,
            'confirmed_amount' => round($confirmedAmount, 2),
            'disputed_count' => $disputedCount,
            'disputed_amount' => round($disputedAmount, 2),
            'accounting_summary' => $this->returnAccounting->summarize($returnRows),
            'filters' => $filters,
            'filter_query' => $filterQuery,
            'is_filtered' => $filterQuery !== [],
        ];
    }

    /** @return array<string,mixed> */
    private function detail(array $mine, string $supplier, int $companyId): array
    {
        $mineRows = array_values(array_filter(
            $mine,
            static fn (array $row): bool => trim((string) ($row['supplier'] ?? '')) === $supplier,
        ));
        $theirRows = $this->statements->rows($supplier, $companyId);

        $compared = $this->matcher->compare($mineRows, $theirRows);
        $compared['mineRows'] = count($mineRows);
        $compared['theirsRows'] = count($theirRows);

        return $compared;
    }

    /** @return list<array<string,mixed>> 该厂家的退货明细（我方数据，展示给厂家确认扣减） */
    public function returnRows(string $supplier, int $companyId): array
    {
        $rows = $this->store->listRows(
            PayablesFinalActions::DATASET_PREFIX . 'supplier:return-reconciliation',
            $companyId,
        );

        return array_values(array_filter(
            $rows,
            static fn (array $row): bool => trim((string) ($row['supplier'] ?? '')) === $supplier,
        ));
    }

    /**
     * 厂家端当前查询条件下的全部退货行（用于导出，不分页）。
     *
     * @param  array<string,mixed>  $input
     * @return list<array<string,mixed>>
     */
    public function returnRowsForFilters(string $supplier, int $companyId, array $input): array
    {
        return $this->filterReturnRows(
            $this->returnRows($supplier, $companyId),
            $this->returnFilters($input),
            $this->returnConfirmations->statuses($supplier, $companyId),
        );
    }

    /**
     * 解析厂家退货查询条件，空值会被忽略。
     *
     * @param  array<string,mixed>  $input
     * @return array{keyword:string,date_from:string,date_to:string,warehouse:string,status:string}
     */
    public function returnFilters(array $input): array
    {
        $dateFrom = $this->normalizeFilterDate($input['return_date_from'] ?? '');
        $dateTo = $this->normalizeFilterDate($input['return_date_to'] ?? '');
        if ($dateFrom !== '' && $dateTo !== '' && $dateFrom > $dateTo) {
            [$dateFrom, $dateTo] = [$dateTo, $dateFrom];
        }

        $status = $this->filterText($input['return_status'] ?? '');
        if (! in_array($status, ['pending', SupplierReturnConfirmation::STATUS_CONFIRMED, SupplierReturnConfirmation::STATUS_DISPUTED], true)) {
            $status = '';
        }

        return [
            'keyword' => $this->filterText($input['return_keyword'] ?? ''),
            'date_from' => $dateFrom,
            'date_to' => $dateTo,
            'warehouse' => $this->filterText($input['return_warehouse'] ?? ''),
            'status' => $status,
        ];
    }

    /**
     * @param  list<array<string,mixed>>  $rows
     * @param  array{keyword:string,date_from:string,date_to:string,warehouse:string,status:string}  $filters
     * @param  array<string,string>  $statuses
     * @return list<array<string,mixed>>
     */
    private function filterReturnRows(array $rows, array $filters, array $statuses): array
    {
        $filtered = [];
        foreach ($rows as $row) {
            $key = (string) ($row['_action_key'] ?? '');
            $status = $statuses[$key] ?? '';

            if ($filters['status'] !== '') {
                $matchesStatus = $filters['status'] === 'pending'
                    ? $status === ''
                    : $status === $filters['status'];
                if (! $matchesStatus) {
                    continue;
                }
            }

            $rowDate = $this->normalizeFilterDate($row['send_time'] ?? '');
            if ($filters['date_from'] !== '' && ($rowDate === '' || $rowDate < $filters['date_from'])) {
                continue;
            }
            if ($filters['date_to'] !== '' && ($rowDate === '' || $rowDate > $filters['date_to'])) {
                continue;
            }

            if (
                $filters['warehouse'] !== ''
                && $this->filterText($row['warehouse'] ?? '') !== $filters['warehouse']
            ) {
                continue;
            }

            if ($filters['keyword'] !== '') {
                $haystack = implode("\n", [
                    $row['send_time'] ?? '',
                    $row['supplier'] ?? '',
                    $row['barcode'] ?? '',
                    $row['sku_name'] ?? '',
                    $row['supplier_barcode'] ?? '',
                    $row['remark'] ?? '',
                    $row['title'] ?? '',
                    $row['wms_pick_no'] ?? '',
                    $row['warehouse'] ?? '',
                    $row['express_no'] ?? '',
                ]);
                if (stripos($haystack, $filters['keyword']) === false) {
                    continue;
                }
            }

            $row['_status'] = $status;
            $filtered[] = $row;
        }

        return $filtered;
    }

    /** @param  array{keyword:string,date_from:string,date_to:string,warehouse:string,status:string}  $filters */
    private function returnFilterQuery(array $filters): array
    {
        return array_filter([
            'return_keyword' => $filters['keyword'],
            'return_date_from' => $filters['date_from'],
            'return_date_to' => $filters['date_to'],
            'return_warehouse' => $filters['warehouse'],
            'return_status' => $filters['status'],
        ], static fn (string $value): bool => $value !== '');
    }

    private function filterText(mixed $value): string
    {
        return is_scalar($value) ? trim((string) $value) : '';
    }

    private function normalizeFilterDate(mixed $value): string
    {
        $raw = $this->filterText($value);
        if (preg_match('/^(\d{4})[-\/.](\d{1,2})[-\/.](\d{1,2})/', $raw, $matches) !== 1) {
            return '';
        }

        $year = (int) $matches[1];
        $month = (int) $matches[2];
        $day = (int) $matches[3];

        return checkdate($month, $day, $year)
            ? sprintf('%04d-%02d-%02d', $year, $month, $day)
            : '';
    }

    private function companyId(): int
    {
        return (int) (company_id() ?: 1);
    }
}