<?php

namespace App\Filament\Resources\Coupons\Schemas;

use App\Enums\CouponStatus;
use App\Enums\CouponType;
use Filament\Forms\Components\DateTimePicker;
use Filament\Forms\Components\KeyValue;
use Filament\Forms\Components\Placeholder;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\Textarea;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Toggle;
use Filament\Schemas\Components\Section;
use Filament\Schemas\Components\Utilities\Get;
use Filament\Schemas\Schema;
use Illuminate\Validation\Rules\Unique;

class CouponForm
{
    public static function configure(Schema $schema): Schema
    {
        $typeOptions = collect(CouponType::cases())
            ->mapWithKeys(fn (CouponType $type) => [$type->value => $type->label()])
            ->all();

        $statusOptions = collect(CouponStatus::cases())
            ->mapWithKeys(fn (CouponStatus $status) => [$status->value => $status->label()])
            ->all();

        return $schema
            ->columns(1)
            ->components([
                Section::make(__('Coupon details'))
                    ->columns(3)
                    ->schema([
                        TextInput::make('name')
                            ->label(__('Name'))
                            ->maxLength(191)
                            ->required(),
                        TextInput::make('code')
                            ->label(__('Code'))
                            ->maxLength(32)
                            ->required()
                            ->helperText(__('Codes are stored uppercase and must be unique.'))
                            ->unique(ignoreRecord: true, modifyRuleUsing: fn (Unique $rule) => $rule->withoutTrashed())
                            ->rule('alpha_dash:ascii'),
                        Select::make('status')
                            ->label(__('Status'))
                            ->options($statusOptions)
                            ->default(CouponStatus::DRAFT)
                            ->required(),
                        Select::make('type')
                            ->label(__('Discount Type'))
                            ->options($typeOptions)
                            ->default(CouponType::PERCENTAGE)
                            ->required(),
                        TextInput::make('amount')
                            ->label(__('Amount'))
                            ->numeric()
                            ->minValue(0)
                            ->step(0.01)
                            ->required(),
                        TextInput::make('currency')
                            ->label(__('Currency'))
                            ->maxLength(3)
                            ->default('EUR')
                            ->helperText(__('Required for flat discounts. Hidden for percentage codes.'))
                            ->disabled(fn (Get $get) => $get('type') === CouponType::PERCENTAGE->value)
                            ->nullable(),
                        Textarea::make('description')
                            ->label(__('Description'))
                            ->rows(3)
                            ->columnSpanFull(),
                        Toggle::make('enabled_for_checkout')
                            ->label(__('Can be redeemed at checkout'))
                            ->default(true),
                        Toggle::make('auto_apply')
                            ->label(__('Auto apply when query parameter matches'))
                            ->helperText(__('Automatically applies when marketing links include ?coupon=CODE.')),
                        Toggle::make('is_stackable')
                            ->label(__('Allow stacking with other coupons'))
                            ->default(false),
                    ]),
                Section::make(__('Limits & Scheduling'))
                    ->columns(2)
                    ->schema([
                        DateTimePicker::make('starts_at')
                            ->label(__('Starts at'))
                            ->seconds(false)
                            ->nullable(),
                        DateTimePicker::make('ends_at')
                            ->label(__('Ends at'))
                            ->seconds(false)
                            ->nullable(),
                        TextInput::make('usage_limit')
                            ->label(__('Global usage limit'))
                            ->numeric()
                            ->minValue(1)
                            ->nullable(),
                        TextInput::make('per_customer_limit')
                            ->label(__('Per tenant limit'))
                            ->numeric()
                            ->minValue(1)
                            ->nullable(),
                    ]),
                Section::make(__('Package restrictions'))
                    ->schema([
                        Select::make('packages')
                            ->label(__('Applicable packages'))
                            ->relationship('packages', 'name')
                            ->multiple()
                            ->preload()
                            ->searchable()
                            ->helperText(__('Leave empty to allow all packages.')),
                    ]),
                Section::make(__('Metadata'))
                    ->schema([
                        KeyValue::make('metadata')
                            ->label(__('Internal metadata'))
                            ->keyLabel(__('Key'))
                            ->valueLabel(__('Value'))
                            ->nullable()
                            ->columnSpanFull(),
                    ]),
                Section::make(__('Paddle sync'))
                    ->columns(2)
                    ->schema([
                        Select::make('paddle_mode')
                            ->label(__('Paddle mode'))
                            ->options([
                                'standard' => __('Standard'),
                                'custom' => __('Custom (one-off)'),
                            ])
                            ->default('standard'),
                        Placeholder::make('paddle_discount_id')
                            ->label(__('Paddle Discount ID'))
                            ->content(fn ($record) => $record?->paddle_discount_id ?? '—'),
                        Placeholder::make('paddle_last_synced_at')
                            ->label(__('Last synced'))
                            ->content(fn ($record) => $record?->paddle_last_synced_at?->diffForHumans() ?? '—'),
                        Placeholder::make('redemptions_count')
                            ->label(__('Total redemptions'))
                            ->content(fn ($record) => number_format($record?->redemptions_count ?? 0)),
                    ]),
            ]);
    }
}