<?php

namespace App\Domains\Ticket\Services;

use App\Domains\Auth\Models\User;
use App\Domains\Purchase\Models\PurchaseItem;
use App\Domains\Tenant\Models\Tenant;
use App\Domains\Ticket\Models\Ticket;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Support\Collection;

class AdminAppTicketService
{
    private const RELATIONS = [
        ...TicketValidityResolver::RELATIONS,
        ...TicketPresentationResolver::RELATIONS,
        'user',
        'scannerUser',
        'sourceCatalogItem.category',
        'sourcePurchaseItem.purchase',
    ];

    public function __construct(
        private readonly AdminAppTicketColumnService $columnService,
        private readonly AdminAppTicketRowService $rowService,
    ) {}

    /**
     * @param  array{q?: string|null, category?: string|null, product?: string|null, type?: string|null, date?: string|null, size?: string|null, status?: string|null, page?: int, per_page?: int, sort_by?: string|null, sort_direction?: string|null}  $filters
     */
    public function search(Tenant $tenant, array $filters = []): AdminAppTicketResult
    {
        $query = $this->baseQuery($tenant, $filters);
        $countQuery = clone $query;

        $databaseSorted = $this->applyDatabaseSort($query, $tenant, $filters);

        if (($filters['sort_by'] ?? null) && ! $databaseSorted) {
            $matchingTickets = (clone $query)
                ->with(self::RELATIONS)
                ->get();
            $matchingTickets = $this->sortTickets($matchingTickets, $tenant, $filters);
            $tickets = $this->paginate($matchingTickets, $filters);
            $scannedTickets = $matchingTickets->whereNotNull('used_at')->count();
        } else {
            $tickets = (clone $query)
                ->with(self::RELATIONS)
                ->when(! $databaseSorted, fn (Builder $query): Builder => $query->orderByDesc('id'))
                ->paginateFromRequest()
                ->withQueryString();
            $scannedTickets = $countQuery->whereNotNull('used_at')->count();
        }

        return new AdminAppTicketResult(
            tickets: $tickets,
            scannedTickets: $scannedTickets,
            totalTickets: $tickets->total(),
        );
    }

    /**
     * @param  array{q?: string|null, category?: string|null, product?: string|null, type?: string|null, date?: string|null, size?: string|null, status?: string|null, sort_by?: string|null, sort_direction?: string|null}  $filters
     * @return Collection<int, Ticket>
     */
    public function ticketsForExport(Tenant $tenant, array $filters = []): Collection
    {
        $query = $this->baseQuery($tenant, $filters);
        $databaseSorted = $this->applyDatabaseSort($query, $tenant, $filters);
        $tickets = $query
            ->with(self::RELATIONS)
            ->when(! $databaseSorted, fn (Builder $query): Builder => $query->orderByDesc('id'))
            ->get();

        return $databaseSorted ? $tickets : $this->sortTickets($tickets, $tenant, $filters);
    }

    /**
     * @param  array{q?: string|null, category?: string|null, product?: string|null, type?: string|null, date?: string|null, size?: string|null, status?: string|null, page?: int, per_page?: int}  $filters
     * @return Builder<Ticket>
     */
    private function baseQuery(Tenant $tenant, array $filters): Builder
    {
        $search = trim((string) ($filters['q'] ?? ''));

        $query = Ticket::query()
            ->where('tenant_code', $tenant->codigo)
            ->when($search !== '', function (Builder $query) use ($search): void {
                $this->applySearchFilter($query, $search);
            })
            ->when($filters['category'] ?? null, function (Builder $query, string $category): void {
                $query->whereHas('sourceCatalogItem.category', fn (Builder $categoryQuery): Builder => $categoryQuery
                    ->whereRaw('LOWER(nombre) = ?', [mb_strtolower(trim($category))]));
            })
            ->when($filters['product'] ?? null, function (Builder $query, string $product) use ($filters): void {
                $this->applyProductFilter($query, (string) ($filters['category'] ?? ''), $product);
            })
            ->when($filters['type'] ?? null, function (Builder $query, string $type) use ($filters): void {
                $this->applyTypeFilter($query, (string) ($filters['category'] ?? ''), $type);
            })
            ->when($filters['date'] ?? null, function (Builder $query, string $date) use ($tenant): void {
                if ($tenant->codigo === 'fiesta_futbol_infantil') {
                    $this->applyEventDateFilter($query, $date);

                    return;
                }

                $query->whereHas('sourcePurchaseItem.purchase', fn (Builder $purchaseQuery): Builder => $purchaseQuery
                    ->whereDate('created_at', $date));
            })
            ->when($filters['size'] ?? null, function (Builder $query, string $size) use ($filters): void {
                $this->applySizeFilter($query, (string) ($filters['category'] ?? ''), $size);
            });

        $this->applyStatusFilter($query, $filters['status'] ?? null);

        return $query;
    }

    /** @param Builder<Ticket> $query */
    private function applySearchFilter(Builder $query, string $search): void
    {
        $containsPattern = '%'.mb_strtolower($search).'%';
        $amount = $this->searchAmount($search);

        $query->where(function (Builder $searchQuery) use ($search, $containsPattern, $amount): void {
            $searchQuery
                ->where(function (Builder $clientQuery) use ($containsPattern): void {
                    $clientQuery
                        ->whereHas('sourcePurchaseItem.purchase', fn (Builder $purchaseQuery): Builder => $purchaseQuery
                            ->whereRaw('LOWER(nombre_apellido) LIKE ?', [$containsPattern]))
                        ->orWhere(function (Builder $fallbackClientQuery) use ($containsPattern): void {
                            $fallbackClientQuery
                                ->where(function (Builder $missingPurchaseClientQuery): void {
                                    $missingPurchaseClientQuery
                                        ->whereDoesntHave('sourcePurchaseItem.purchase')
                                        ->orWhereHas('sourcePurchaseItem.purchase', fn (Builder $purchaseQuery): Builder => $purchaseQuery
                                            ->whereNull('nombre_apellido'));
                                })
                                ->whereHas('user', fn (Builder $userQuery): Builder => $userQuery
                                    ->whereRaw('LOWER(nombre_apellido) LIKE ?', [$containsPattern]));
                        });
                })
                ->orWhereHas('scannerUser', fn (Builder $scannerQuery): Builder => $scannerQuery
                    ->whereRaw('LOWER(nombre_apellido) LIKE ?', [$containsPattern]));

            if (ctype_digit($search)) {
                $searchQuery
                    ->orWhere('tickets.id', (int) $search)
                    ->orWhereHas('sourcePurchaseItem', fn (Builder $purchaseItemQuery): Builder => $purchaseItemQuery
                        ->where('compra_id', (int) $search));
            }

            if ($amount !== null) {
                $searchQuery->orWhereHas('sourcePurchaseItem', fn (Builder $purchaseItemQuery): Builder => $purchaseItemQuery
                    ->where('precio_unitario', $amount));
            }
        });
    }

    private function searchAmount(string $search): ?string
    {
        $value = preg_replace('/[\s$]/u', '', trim($search));
        if ($value === null || $value === '') {
            return null;
        }

        if (preg_match('/^\d{1,3}(?:\.\d{3})+(?:,\d{1,2})?$/', $value) === 1) {
            $value = str_replace(['.', ','], ['', '.'], $value);
        } elseif (preg_match('/^\d{1,3}(?:,\d{3})+(?:\.\d{1,2})?$/', $value) === 1) {
            $value = str_replace(',', '', $value);
        } elseif (preg_match('/^\d+(?:[.,]\d{1,2})?$/', $value) === 1) {
            $value = str_replace(',', '.', $value);
        } else {
            return null;
        }

        return number_format((float) $value, 2, '.', '');
    }

    /** @param Builder<Ticket> $query */
    private function applyProductFilter(Builder $query, string $category, string $product): void
    {
        $category = $this->normalizedCategory($category);

        if (in_array($category, ['alojamientos', 'camping'], true)) {
            $this->whereVariantDefinition($query, 'tipo_alojamiento', $product);

            return;
        }

        if (in_array($category, ['comidas', 'comida'], true)) {
            $this->whereVariantDefinition($query, 'horario', $product);

            return;
        }

        $query->whereHas('sourceCatalogItem', fn (Builder $itemQuery): Builder => $itemQuery
            ->where('slug', $product));
    }

    /** @param Builder<Ticket> $query */
    private function applyTypeFilter(Builder $query, string $category, string $type): void
    {
        $attribute = match ($this->normalizedCategory($category)) {
            'comidas', 'comida' => 'servicio',
            'merchandising' => 'color',
            default => null,
        };

        if ($attribute !== null) {
            $this->whereVariantDefinition($query, $attribute, $type);
        }
    }

    /** @param Builder<Ticket> $query */
    private function applyEventDateFilter(Builder $query, string $date): void
    {
        $query
            ->whereHas('sourceCatalogItem.category', fn (Builder $categoryQuery): Builder => $categoryQuery
                ->whereRaw('LOWER(nombre) IN (?, ?)', ['comidas', 'comida']))
            ->whereHas('sourceVariant', function (Builder $variantQuery) use ($date): void {
                $variantQuery->where(function (Builder $dateQuery) use ($date): void {
                    $dateQuery
                        ->whereHas('eventDate', fn (Builder $eventDateQuery): Builder => $eventDateQuery
                            ->whereDate('date', $date))
                        ->orWhereHas('eventDates', fn (Builder $eventDateQuery): Builder => $eventDateQuery
                            ->whereDate('date', $date));
                });
            });
    }

    /** @param Builder<Ticket> $query */
    private function applySizeFilter(Builder $query, string $category, string $size): void
    {
        if ($this->normalizedCategory($category) === 'merchandising') {
            $this->whereVariantDefinition($query, 'talle', $size);
        }
    }

    /** @param Builder<Ticket> $query */
    private function whereVariantDefinition(Builder $query, string $attribute, string $value): void
    {
        $query->whereHas('sourceVariant.definitions', fn (Builder $definitionQuery): Builder => $definitionQuery
            ->where('value', $value)
            ->whereHas('itemAttribute.attribute', fn (Builder $attributeQuery): Builder => $attributeQuery
                ->where('codigo', $attribute)));
    }

    /** @param Builder<Ticket> $query */
    private function applyStatusFilter(Builder $query, ?string $status): void
    {
        if ($status === null || $status === '') {
            return;
        }

        if ($status === Ticket::STATUS_USED) {
            $query->whereNotNull('used_at');

            return;
        }

        $matchingIds = (clone $query)
            ->whereNull('used_at')
            ->with(TicketValidityResolver::RELATIONS)
            ->get()
            ->filter(fn (Ticket $ticket): bool => $ticket->status === $status)
            ->pluck('id');

        $query->whereIn('tickets.id', $matchingIds);
    }

    private function normalizedCategory(string $category): string
    {
        return mb_strtolower(trim($category));
    }

    /**
     * @param  Builder<Ticket>  $query
     * @param  array{sort_by?: string|null, sort_direction?: string|null}  $filters
     */
    private function applyDatabaseSort(Builder $query, Tenant $tenant, array $filters): bool
    {
        $sortBy = (string) ($filters['sort_by'] ?? '');
        if ($sortBy === '') {
            return false;
        }

        $direction = ($filters['sort_direction'] ?? 'asc') === 'desc' ? 'desc' : 'asc';

        $sortExpression = match ($sortBy) {
            'order_number' => $this->purchaseItemColumnQuery('compra_id'),
            'id' => 'tickets.id',
            'amount' => $this->purchaseItemColumnQuery('precio_unitario'),
            'scanned_by' => User::query()
                ->withTrashed()
                ->select('nombre_apellido')
                ->whereColumn('users.id', 'tickets.scanner_user_id'),
            'product' => $tenant->codigo === 'fiesta_futbol_infantil'
                ? null
                : $this->purchaseItemColumnQuery('item_nombre'),
            default => null,
        };

        if ($sortExpression === null) {
            return false;
        }

        $query->orderBy($sortExpression, $direction)->orderByDesc('tickets.id');

        return true;
    }

    /** @return Builder<PurchaseItem> */
    private function purchaseItemColumnQuery(string $column): Builder
    {
        return PurchaseItem::query()
            ->select($column)
            ->whereColumn('compra_items.id', 'tickets.source_purchase_item_id')
            ->limit(1);
    }

    /**
     * @param  Collection<int, Ticket>  $tickets
     * @param  array{sort_by?: string|null, sort_direction?: string|null}  $filters
     * @return Collection<int, Ticket>
     */
    private function sortTickets(Collection $tickets, Tenant $tenant, array $filters): Collection
    {
        $sortBy = (string) ($filters['sort_by'] ?? '');
        if ($sortBy === '') {
            return $tickets;
        }

        $column = collect($this->columnService->columns($tenant))
            ->firstWhere('sort_param', $sortBy);
        if ($column === null) {
            return $tickets;
        }

        $direction = ($filters['sort_direction'] ?? 'asc') === 'desc' ? -1 : 1;
        $values = $tickets->mapWithKeys(fn (Ticket $ticket): array => [
            $ticket->getKey() => $this->rowService->values($ticket)[$column['key']] ?? null,
        ]);

        return $tickets->sort(function (Ticket $left, Ticket $right) use ($column, $direction, $values): int {
            $leftValue = $values->get($left->getKey());
            $rightValue = $values->get($right->getKey());

            if ($leftValue === null || $leftValue === '') {
                return $rightValue === null || $rightValue === '' ? $right->id <=> $left->id : 1;
            }
            if ($rightValue === null || $rightValue === '') {
                return -1;
            }

            $comparison = $this->compareValues($leftValue, $rightValue, $column['type']);

            return $comparison === 0
                ? $right->id <=> $left->id
                : $comparison * $direction;
        })->values();
    }

    private function compareValues(mixed $left, mixed $right, string $type): int
    {
        if (in_array($type, ['currency', 'order_number'], true)) {
            return (float) $left <=> (float) $right;
        }

        if ($type === 'date') {
            $leftTimestamp = $left instanceof \DateTimeInterface ? $left->getTimestamp() : strtotime((string) $left);
            $rightTimestamp = $right instanceof \DateTimeInterface ? $right->getTimestamp() : strtotime((string) $right);

            return $leftTimestamp <=> $rightTimestamp;
        }

        if ($type === 'status') {
            $left = $this->rowService->displayValue($left, $type, 'UTC');
            $right = $this->rowService->displayValue($right, $type, 'UTC');
        }

        return strnatcasecmp((string) $left, (string) $right);
    }

    /**
     * @param  Collection<int, Ticket>  $tickets
     * @param  array{page?: int, per_page?: int}  $filters
     * @return LengthAwarePaginator<Ticket>
     */
    private function paginate(Collection $tickets, array $filters): LengthAwarePaginator
    {
        $page = (int) ($filters['page'] ?? 1);
        $perPage = (int) ($filters['per_page'] ?? 15);

        return (new LengthAwarePaginator(
            $tickets->forPage($page, $perPage)->values(),
            $tickets->count(),
            $perPage,
            $page,
            ['path' => request()->url()],
        ))->withQueryString();
    }
}