<?php

namespace App\Filament\Resources;

use App\Enums\ShipmentStatus;
use App\Filament\Resources\ShipmentResource\Pages;
use App\Filament\Resources\ShipmentResource\RelationManagers;
use App\Models\Shipment;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use Filament\Tables\Actions\Action;

class ShipmentResource extends Resource
{
    protected static ?string $model = Shipment::class;

    protected static ?string $navigationIcon = 'heroicon-o-truck';

    protected static ?string $navigationLabel = 'مرسولات';
    protected static ?string $navigationGroup = 'عملیات';
    protected static ?int $navigationSort = 1;

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\Section::make('Route & Status')
                    ->schema([
                        Forms\Components\TextInput::make('awb_no')
                            ->required()
                            ->unique(ignoreRecord: true)
                            ->label('AWB No.'),
                        Forms\Components\Select::make('direction')
                            ->options([
                                'export' => 'Export',
                                'import' => 'Import'
                            ])
                            ->required(),
                        Forms\Components\Select::make('type')
                            ->options([
                                'DOC_NORMAL' => 'Doc Normal',
                                'DOC_ECONOMY' => 'Doc Economy',
                                'PARCEL' => 'Parcel',
                            ])
                            ->required()
                            ->live(),
                        Forms\Components\Select::make('status')
                            ->options(collect(ShipmentStatus::cases())->mapWithKeys(fn ($case) => [
                                $case->value => $case->label(),
                            ]))
                            ->default('processed')
                            ->required(),
                        Forms\Components\TextInput::make('reason_for_export')
                            ->nullable()
                            ->label('Reason for Export'),
                        Forms\Components\Select::make('from_country_id')
                            ->relationship('fromCountry', 'name')
                            ->searchable()
                            ->preload()
                            ->label('From Country'),
                        Forms\Components\Select::make('to_country_id')
                            ->relationship('toCountry', 'name')
                            ->searchable()
                            ->preload()
                            ->label('To Country'),
                        Forms\Components\TextInput::make('forwarder')
                            ->nullable()
                            ->label('Forwarder'),
                    ])->columns(3),

                Forms\Components\Section::make('Weight & Dimensions')
                    ->schema([
                        Forms\Components\TextInput::make('weight')
                            ->numeric()
                            ->nullable()
                            ->suffix('kg')
                            ->label('Weight'),
                        Forms\Components\TextInput::make('volumetric_weight')
                            ->numeric()
                            ->nullable()
                            ->suffix('kg')
                            ->label('Volumetric Weight'),
                        Forms\Components\TextInput::make('chargeable_weight')
                            ->numeric()
                            ->nullable()
                            ->suffix('kg')
                            ->label('Chargeable Weight'),
                        Forms\Components\TextInput::make('dimensions')
                            ->nullable()
                            ->label('Dimensions (WxLxH)'),
                        Forms\Components\TextInput::make('declared_value')
                            ->numeric()
                            ->nullable()
                            ->prefix('USD')
                            ->label('Declared Value'),
                        Forms\Components\TextInput::make('content_description')
                            ->nullable()
                            ->label('Content Description'),
                        Forms\Components\TextInput::make('reason_for_export')
                            ->nullable()
                            ->label('Reason for Export'),
                    ])->columns(4),

                Forms\Components\Section::make('Financial Info')
                    ->schema([
                        Forms\Components\TextInput::make('shipping_price')
                            ->numeric()
                            ->nullable()
                            ->prefix('درهم')
                            ->label('Shipping Price'),
                        Forms\Components\TextInput::make('extra_service')
                            ->numeric()
                            ->default(0)
                            ->prefix('درهم')
                            ->label('Extra Service'),
                        Forms\Components\TextInput::make('packing_cost')
                            ->numeric()
                            ->default(0)
                            ->prefix('ریال')
                            ->label('Packing Cost'),
                        Forms\Components\TextInput::make('domestic_pickup')
                            ->numeric()
                            ->default(0)
                            ->prefix('ریال')
                            ->label('Domestic Pickup'),
                        Forms\Components\TextInput::make('domestic_delivery')
                            ->numeric()
                            ->default(0)
                            ->prefix('ریال')
                            ->label('Domestic Delivery'),
                        Forms\Components\TextInput::make('warehousing_cost')
                            ->numeric()
                            ->default(0)
                            ->prefix('ریال')
                            ->label('Warehousing Cost'),
                        Forms\Components\TextInput::make('vat_amount')
                            ->numeric()
                            ->default(0)
                            ->prefix('ریال')
                            ->label('VAT Amount'),
                        Forms\Components\TextInput::make('discount')
                            ->numeric()
                            ->default(0)
                            ->prefix('ریال')
                            ->label('Discount'),
                        Forms\Components\TextInput::make('total_fee')
                            ->numeric()
                            ->nullable()
                            ->prefix('ریال')
                            ->label('Total Fee'),
                        Forms\Components\TextInput::make('net_dirham')
                            ->numeric()
                            ->nullable()
                            ->prefix('درهم')
                            ->label('Net Dirham'),
                        Forms\Components\TextInput::make('net_rial')
                            ->numeric()
                            ->nullable()
                            ->prefix('ریال')
                            ->label('Net Rial'),
                        Forms\Components\TextInput::make('cod_amount')
                            ->numeric()
                            ->default(0)
                            ->prefix('AED')
                            ->label('Cash on Delivery'),
                    ])->columns(4),

                Forms\Components\Section::make('Sender Info')
                    ->schema([
                        Forms\Components\TextInput::make('sender_name')
                            ->nullable()
                            ->label('Name'),
                        Forms\Components\TextInput::make('sender_company')
                            ->nullable()
                            ->label('Company'),
                        Forms\Components\TextInput::make('sender_phone')
                            ->tel()
                            ->nullable()
                            ->label('Phone'),
                        Forms\Components\TextInput::make('sender_email')
                            ->email()
                            ->nullable()
                            ->label('Email'),
                        Forms\Components\TextInput::make('sender_address')
                            ->nullable()
                            ->label('Address'),
                        Forms\Components\TextInput::make('sender_city')
                            ->nullable()
                            ->label('City'),
                        Forms\Components\TextInput::make('sender_state')
                            ->nullable()
                            ->label('State/Province'),
                        Forms\Components\TextInput::make('sender_zip')
                            ->nullable()
                            ->label('ZIP'),
                        Forms\Components\TextInput::make('sender_id_number')
                            ->nullable()
                            ->label('ID Number'),
                    ])->columns(4),

                Forms\Components\Section::make('Receiver Info')
                    ->schema([
                        Forms\Components\TextInput::make('receiver_name')
                            ->nullable()
                            ->label('Name'),
                        Forms\Components\TextInput::make('receiver_company')
                            ->nullable()
                            ->label('Company'),
                        Forms\Components\TextInput::make('receiver_phone')
                            ->tel()
                            ->nullable()
                            ->label('Phone'),
                        Forms\Components\TextInput::make('receiver_email')
                            ->email()
                            ->nullable()
                            ->label('Email'),
                        Forms\Components\TextInput::make('receiver_address')
                            ->nullable()
                            ->label('Address'),
                        Forms\Components\TextInput::make('receiver_city')
                            ->nullable()
                            ->label('City'),
                        Forms\Components\TextInput::make('receiver_state')
                            ->nullable()
                            ->label('State/Province'),
                        Forms\Components\TextInput::make('receiver_zip')
                            ->nullable()
                            ->label('ZIP'),
                        Forms\Components\TextInput::make('receiver_id_number')
                            ->nullable()
                            ->label('ID Number'),
                    ])->columns(4),

                Forms\Components\Section::make('Customs Items')
                    ->schema([
                        Forms\Components\Repeater::make('items')
                            ->relationship()
                            ->schema([
                                Forms\Components\TextInput::make('row_number')
                                    ->required()
                                    ->numeric()
                                    ->minValue(1)
                                    ->maxValue(9)
                                    ->label('Row'),
                                Forms\Components\TextInput::make('description')
                                    ->required()
                                    ->columnSpan(2)
                                    ->label('Description'),
                                Forms\Components\TextInput::make('hs_code')
                                    ->required()
                                    ->label('HS Code'),
                                Forms\Components\TextInput::make('quantity')
                                    ->required()
                                    ->numeric()
                                    ->label('Qty'),
                                Forms\Components\TextInput::make('unit_price')
                                    ->required()
                                    ->numeric()
                                    ->prefix('USD')
                                    ->label('Unit Price'),
                                Forms\Components\TextInput::make('total_usd')
                                    ->required()
                                    ->numeric()
                                    ->prefix('USD')
                                    ->label('Total'),
                            ])
                            ->columns(6)
                            ->maxItems(9)
                            ->defaultItems(1)
                            ->reorderable()
                            ->label('Items'),
                    ]),

                Forms\Components\Section::make('Customer Notes')->schema([
                    Forms\Components\Textarea::make('customer_notes')->nullable()->rows(3)->label('Customer Notes'),
                ]),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('awb_no')
                    ->searchable()
                    ->label('AWB No.')
                    ->sortable(),
                Tables\Columns\TextColumn::make('direction')
                    ->badge()
                    ->color(fn (\App\Enums\ShipmentDirection $state): string => match ($state->value) {
                        'import' => 'success',
                        'export' => 'info',
                        default => 'gray',
                    })
                    ->label('Direction'),
                Tables\Columns\TextColumn::make('type')
                    ->badge()
                    ->label('Type'),
                Tables\Columns\TextColumn::make('status')
                    ->badge()
                    ->color(fn (ShipmentStatus $state): string => $state->color())
                    ->formatStateUsing(fn (ShipmentStatus $state): string => $state->label())
                    ->searchable()
                    ->label('Status'),
                Tables\Columns\TextColumn::make('sender_name')
                    ->searchable()
                    ->toggleable()
                    ->label('Sender'),
                Tables\Columns\TextColumn::make('receiver_name')
                    ->searchable()
                    ->toggleable()
                    ->label('Receiver'),
                Tables\Columns\TextColumn::make('total_fee')
                    ->money('IRR')
                    ->sortable()
                    ->label('Total Fee'),
                Tables\Columns\TextColumn::make('created_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->filters([
                Tables\Filters\SelectFilter::make('status')
                    ->options(collect(ShipmentStatus::cases())->mapWithKeys(fn ($case) => [
                        $case->value => $case->label(),
                    ])),
                Tables\Filters\SelectFilter::make('type')
                    ->options([
                        'DOC_NORMAL' => 'Doc Normal',
                        'DOC_ECONOMY' => 'Doc Economy',
                        'PARCEL' => 'Parcel',
                    ]),
                Tables\Filters\SelectFilter::make('direction')
                    ->options([
                        'export' => 'Export',
                        'import' => 'Import'
                    ]),
            ])
            ->actions([
                Tables\Actions\ViewAction::make(),
                Tables\Actions\EditAction::make(),
            ])
            ->headerActions([
                Action::make('exportCsv')
                    ->label('خروجی CSV')
                    ->icon('heroicon-o-arrow-down-tray')
                    ->color('success')
                    ->action(function () {
                        return response()->streamDownload(function () {
                            $csv = fopen('php://output', 'w');
                            
                            // BOM برای پشتیبانی از فارسی در Excel
                            fwrite($csv, "\xEF\xBB\xBF");
                            
                            // Header
                            fputcsv($csv, [
                                'AWB No',
                                'Direction',
                                'Type',
                                'Status',
                                'From Country',
                                'To Country',
                                'Weight (kg)',
                                'Chargeable Weight (kg)',
                                'Shipping Price (AED)',
                                'Extra Service (AED)',
                                'Packing Cost (IRR)',
                                'Total Fee (IRR)',
                                'Net Rial (IRR)',
                                'Sender Name',
                                'Sender Phone',
                                'Receiver Name',
                                'Receiver Phone',
                                'Created At'
                            ]);
                            
                            // Data
                            Shipment::query()
                                ->with(['fromCountry', 'toCountry'])
                                ->orderBy('created_at', 'desc')
                                ->chunk(500, function ($shipments) use ($csv) {
                                    foreach ($shipments as $s) {
                                        fputcsv($csv, [
                                            $s->awb_no,
                                            $s->direction?->value ?? '',
                                            $s->type?->value ?? '',
                                            $s->status?->value ?? '',
                                            $s->fromCountry?->name ?? '',
                                            $s->toCountry?->name ?? '',
                                            $s->weight,
                                            $s->chargeable_weight,
                                            $s->shipping_price,
                                            $s->extra_service,
                                            $s->packing_cost,
                                            $s->total_fee,
                                            $s->net_rial,
                                            $s->sender_name,
                                            $s->sender_phone,
                                            $s->receiver_name,
                                            $s->receiver_phone,
                                            $s->created_at?->format('Y-m-d H:i'),
                                        ]);
                                    }
                                });
                            
                            fclose($csv);
                        }, 'shipments_' . now()->format('Y-m-d_H-i') . '.csv', [
                            'Content-Type' => 'text/csv; charset=UTF-8',
                        ]);
                    }),
            ])
            ->bulkActions([
                Tables\Actions\BulkActionGroup::make([
                    Tables\Actions\DeleteBulkAction::make(),
                ]),
            ]);
    }

    public static function getRelations(): array
    {
        return [
            RelationManagers\CarrierMappingsRelationManager::class,
            RelationManagers\TrackingEventsRelationManager::class,
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListShipments::route('/'),
            'create' => Pages\CreateShipment::route('/create'),
            'view' => Pages\ViewShipment::route('/{record}'),
            'edit' => Pages\EditShipment::route('/{record}/edit'),
        ];
    }
}