<?php

namespace App\Filament\Resources;

use App\Definitions\DonationOccurrence;
use App\Filament\Exports\DonationExporter;
use App\Filament\Resources\DonationResource\Pages\EditDonation;
use App\Filament\Resources\DonationResource\Pages\ListDonations;
use App\Filament\Resources\DonationResource\RelationManagers\EventLogsRelationManager;
use App\Filament\RelationManagers\InternalNotesRelationManager;
use App\Helpers;
use App\Jobs\N3O\Data\SendDonation;
use App\Jobs\Zapier\Data\SendCustomer;
use App\Mail\DonationConfirmed;
use App\Models\Donation;
use App\Models\DonationCountry;
use App\Models\DonationType;
use App\Models\EverGiveDonation;
use Filament\Forms\Components\DatePicker;
use Filament\Forms\Components\Fieldset;
use Filament\Forms\Components\Grid;
use Filament\Forms\Components\Placeholder;
use Filament\Forms\Components\Section;
use Filament\Forms\Components\Select;
use Filament\Forms\Form;
use Filament\GlobalSearch\Actions\Action as GlobalSearchAction;
use Filament\Notifications\Notification;
use Filament\Resources\Resource;
use Filament\Tables\Actions\Action;
use Filament\Tables\Actions\ActionGroup;
use Filament\Tables\Actions\BulkAction;
use Filament\Tables\Actions\BulkActionGroup;
use Filament\Tables\Actions\ExportAction;
use Filament\Tables\Actions\ViewAction;
use Filament\Tables\Columns\IconColumn;
use Filament\Tables\Columns\TextColumn;
use Filament\Tables\Filters\Filter;
use Filament\Tables\Filters\SelectFilter;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Mail;
use Illuminate\Support\HtmlString;
use Throwable;

class DonationResource extends Resource
{
    protected static ?string $model = Donation::class;

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

    protected static ?string $navigationGroup = 'Donations';

    protected static ?string $navigationLabel = 'All Donations';

    protected static ?string $modelLabel = 'Donation';

    protected static ?string $pluralModelLabel = 'Donations';

    protected static ?int $navigationSort = 1;

    // ─── Global Search ────────────────────────────────────────────
    // Staff search by donor name, email, or payment reference.
    // "Someone called about payment ref pi_3xxx" → finds it instantly.

    public static function getGloballySearchableAttributes(): array
    {
        return ['reference_code', 'provider_reference'];
    }

    public static function getGlobalSearchResultTitle(Model $record): string|HtmlString
    {
        $status = $record->isConfirmed() ? '✓' : '✗';
        return $status . ' £' . number_format($record->amount / 100, 2) . ' — ' . ($record->customer?->name ?? 'Unknown donor');
    }

    public static function getGlobalSearchResultDetails(Model $record): array
    {
        return [
            'Cause' => $record->donationType?->display_name ?? '—',
            'Date' => $record->created_at?->format('d M Y H:i'),
            'Ref' => $record->reference_code ?? '—',
            'Status' => $record->isConfirmed() ? 'Confirmed' : 'Incomplete',
        ];
    }

    public static function getGlobalSearchResultActions(Model $record): array
    {
        return [
            GlobalSearchAction::make('edit')
                ->label('View Donation')
                ->url(static::getUrl('edit', ['record' => $record])),
        ];
    }

    public static function getGlobalSearchEloquentQuery(): Builder
    {
        return parent::getGlobalSearchEloquentQuery()
            ->with(['customer', 'donationType', 'donationConfirmation'])
            ->latest('created_at');
    }

    public static function getGlobalSearchResultsLimit(): int
    {
        return 8;
    }

    // ─── Form (Edit/View screen) ─────────────────────────────────

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Section::make('Donation Details')
                    ->collapsible()
                    ->schema([
                        Grid::make(5)->schema([
                            Placeholder::make('Confirmed?')
                                ->content(fn (Donation $record) => new HtmlString(
                                    $record->isConfirmed()
                                        ? '<span class="text-green-600 font-bold">✓ Confirmed</span>'
                                        : '<span class="text-red-600 font-bold">✗ Incomplete</span>'
                                )),

                            Placeholder::make('Amount')
                                ->content(fn (Donation $record) => new HtmlString('<b>' . Helpers::formatMoneyGlobal($record->donationTotal()) . '</b>')),

                            Placeholder::make('Admin Contribution')
                                ->content(fn (Donation $record) => new HtmlString('<b>' . Helpers::formatMoneyGlobal($record->donationAdminAmount()) . '</b>')),

                            Placeholder::make('Gift Aid?')
                                ->content(fn (Donation $record) => new HtmlString(
                                    $record->isGiftAid()
                                        ? '<span class="text-green-600 font-bold">✓ Yes</span>'
                                        : '<span class="text-gray-400">No</span>'
                                )),

                            Placeholder::make('Zakat?')
                                ->content(fn (Donation $record) => new HtmlString(
                                    $record->isZakat()
                                        ? '<span class="text-green-600 font-bold">✓ Yes</span>'
                                        : '<span class="text-gray-400">No</span>'
                                )),
                        ]),

                        Fieldset::make('Donor')
                            ->columns(3)
                            ->schema([
                                Placeholder::make('name')
                                    ->content(fn (Donation $donation) => $donation->customer?->name ?? '—'),

                                Placeholder::make('email')
                                    ->content(fn (Donation $donation) => $donation->customer?->email ?? '—'),

                                Placeholder::make('phone')
                                    ->content(fn (Donation $donation) => strlen(trim($phone = $donation->customer?->phone ?? '')) > 0 ? $phone : new HtmlString('<i class="text-gray-400">Not provided</i>')),
                            ])
                            ->visible(fn (Donation $donation) => (bool) $donation->customer),

                        Fieldset::make('Address')
                            ->columns(3)
                            ->schema([
                                Placeholder::make('house')
                                    ->content(fn (Donation $donation) => strlen(trim($v = $donation->address?->house ?? '')) ? $v : new HtmlString('<i class="text-gray-400">—</i>')),

                                Placeholder::make('street')
                                    ->content(fn (Donation $donation) => strlen(trim($v = $donation->address?->street ?? '')) ? $v : new HtmlString('<i class="text-gray-400">—</i>')),

                                Placeholder::make('town')
                                    ->content(fn (Donation $donation) => strlen(trim($v = $donation->address?->town ?? '')) ? $v : new HtmlString('<i class="text-gray-400">—</i>')),

                                Placeholder::make('state')
                                    ->content(fn (Donation $donation) => strlen(trim($v = $donation->address?->state ?? '')) ? $v : new HtmlString('<i class="text-gray-400">—</i>')),

                                Placeholder::make('postcode')
                                    ->content(fn (Donation $donation) => strlen(trim($v = $donation->address?->postcode ?? '')) ? $v : new HtmlString('<i class="text-gray-400">—</i>')),

                                Placeholder::make('country_code')
                                    ->content(fn (Donation $donation) => strlen(trim($v = $donation->address?->country_code ?? '')) ? $v : new HtmlString('<i class="text-gray-400">—</i>')),
                            ])
                            ->visible(fn (Donation $donation) => (bool) $donation->address),

                        Fieldset::make('Allocation')
                            ->schema([
                                Select::make('donation_type_id')
                                    ->label('Cause')
                                    ->relationship('donationType', 'display_name')
                                    ->required()
                                    ->disabled(),

                                Select::make('donation_country_id')
                                    ->label('Country')
                                    ->relationship('donationCountry', 'name')
                                    ->required()
                                    ->disabled(),

                                Select::make('appeal_id')
                                    ->label('Fundraiser')
                                    ->relationship('appeal', 'name')
                                    ->searchable()
                                    ->live()
                                    ->disabled()
                                    ->visible(fn (Donation $donation) => $donation->appeal_id !== null),

                                Placeholder::make('ever_give_donation')
                                    ->content(fn (Donation $donation) =>
                                        '£' . number_format(
                                            EverGiveDonation::where('donation_id', $donation->id)->value('amount') ?? 0,
                                            2
                                        )
                                    )->visible(function (Donation $donation) {
                                        return EverGiveDonation::where('donation_id', $donation->id)->where('status', '!=', 'failed_to_send_to_ever_give_api')->first();
                                    }),
                            ]),
                    ]),
            ]);
    }

    // ─── Table ────────────────────────────────────────────────────
    // Designed for two workflows:
    // 1. "Find a specific donation" (search by donor name/email/ref)
    // 2. "What happened today?" (default sort, quick status scan)

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                IconColumn::make('is_confirmed')
                    ->label('')
                    ->boolean()
                    ->trueIcon('heroicon-o-check-circle')
                    ->falseIcon('heroicon-o-x-circle')
                    ->trueColor('success')
                    ->falseColor('danger')
                    ->tooltip(fn (Donation $d) => $d->isConfirmed() ? 'Payment confirmed' : 'Payment incomplete — may need follow-up'),

                TextColumn::make('created_at')
                    ->label('Date')
                    ->dateTime('d M Y H:i')
                    ->sortable()
                    ->description(fn (Donation $d) => $d->created_at?->diffForHumans()),

                TextColumn::make('customer.name')
                    ->label('Donor')
                    ->description(fn (Donation $d) => $d->customer?->email)
                    ->searchable(query: function (Builder $query, string $search) {
                        $query->whereHas('customer', fn ($q) => $q
                            ->where('first_name', 'like', "%{$search}%")
                            ->orWhere('last_name', 'like', "%{$search}%")
                            ->orWhere('email', 'like', "%{$search}%")
                        );
                    })
                    ->sortable(),

                TextColumn::make('amount')
                    ->label('Amount')
                    ->money('gbp', divideBy: 100)
                    ->sortable()
                    ->weight('bold'),

                TextColumn::make('donationType.display_name')
                    ->label('Cause')
                    ->badge()
                    ->color('info')
                    ->toggleable(),

                TextColumn::make('reoccurrence')
                    ->label('Type')
                    ->formatStateUsing(fn ($state) => match ((int) $state) {
                        -1 => 'One-off',
                        2 => 'Monthly',
                        default => DonationOccurrence::translate($state),
                    })
                    ->badge()
                    ->color(fn ($state) => match ((int) $state) {
                        -1 => 'gray',
                        2 => 'success',
                        default => 'warning',
                    }),

                TextColumn::make('appeal.name')
                    ->label('Fundraiser')
                    ->toggleable()
                    ->limit(25)
                    ->placeholder('Direct'),

                TextColumn::make('reference_code')
                    ->label('Ref')
                    ->searchable()
                    ->fontFamily('mono')
                    ->copyable()
                    ->toggleable(isToggledHiddenByDefault: true),

                TextColumn::make('provider_reference')
                    ->label('Payment Ref')
                    ->searchable()
                    ->fontFamily('mono')
                    ->copyable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->filters(static::getTableFilters())
            ->actions(static::getTableRowActions())
            ->bulkActions(static::getBulkActions())
            ->headerActions([
                ExportAction::make('donations')
                    ->visible(fn () => Auth::user()?->hasRole('Superadmin') || Auth::user()?->hasPermissionTo('view-donation'))
                    ->label('Export')
                    ->icon('heroicon-o-arrow-down-on-square')
                    ->exporter(DonationExporter::class),
            ])
            ->defaultSort('created_at', 'desc')
            ->searchPlaceholder('Search by donor name, email, or reference...')
            ->poll('30s');
    }

    public static function getRelations(): array
    {
        return [
            EventLogsRelationManager::class,
            InternalNotesRelationManager::class,
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => ListDonations::route('/'),
            'edit' => EditDonation::route('/{record}/edit'),
        ];
    }

    // ─── Table Actions ───────────────────────────────────────────
    // Quick actions that solve problems without navigating away.
    // "See a failed donation? → Resend receipt. See unknown donor? → Open profile."

    private static function getTableRowActions(): array
    {
        return [
            Action::make('view_donor')
                ->label('Donor')
                ->icon('heroicon-o-user')
                ->color('gray')
                ->url(fn (Donation $d) => $d->customer_id
                    ? CustomerResource::getUrl('edit', ['record' => $d->customer_id])
                    : null)
                ->visible(fn (Donation $d) => (bool) $d->customer_id)
                ->openUrlInNewTab(),

            ActionGroup::make([
                ViewAction::make(),

                Action::make('send_receipt')
                    ->label('Send Receipt')
                    ->icon('heroicon-o-envelope')
                    ->requiresConfirmation()
                    ->modalDescription(fn (Donation $d) => 'Send receipt to ' . ($d->customer?->email ?? '?'))
                    ->visible(fn (Donation $d) => $d->isConfirmed() && (Auth::user()?->hasRole('Superadmin') || Auth::user()?->hasPermissionTo('view-donation')))
                    ->action(function (Donation $donation) {
                        try {
                            Mail::to($donation->customer->email)->send(new DonationConfirmed($donation));
                            Notification::make()->title('Receipt sent to ' . $donation->customer->email)->success()->send();
                        } catch (Throwable $e) {
                            Log::error($e);
                            Notification::make()->title('Failed to send receipt')->body($e->getMessage())->danger()->send();
                        }
                    }),

                Action::make('view_in_stripe')
                    ->label('View in Stripe')
                    ->icon('heroicon-o-arrow-top-right-on-square')
                    ->visible(fn (Donation $d) => (bool) $d->provider_reference)
                    ->url(fn (Donation $d) => 'https://dashboard.stripe.com/search?query=' . urlencode($d->provider_reference))
                    ->openUrlInNewTab(),

                Action::make('send_to_engage')
                    ->label('Send to Engage')
                    ->icon('heroicon-o-arrow-up-on-square')
                    ->visible(fn (Donation $d) => $d->isConfirmed() && (Auth::user()?->hasRole('Superadmin') || Auth::user()?->hasPermissionTo('view-donation')))
                    ->action(function (Donation $donation) {
                        dispatch(new SendDonation($donation));
                        Notification::make()->title('Sent to Engage')->success()->send();
                    }),

                Action::make('send_to_zapier')
                    ->label('Send to Zapier')
                    ->icon('heroicon-o-arrow-up-on-square')
                    ->visible(fn (Donation $d) => $d->isConfirmed() && (Auth::user()?->hasRole('Superadmin') || Auth::user()?->hasPermissionTo('view-donation')))
                    ->action(function (Donation $donation) {
                        dispatch(new SendCustomer($donation->customer));
                        Notification::make()->title('Sent to Zapier')->success()->send();
                    }),
            ]),
        ];
    }

    private static function getBulkActions()
    {
        return BulkActionGroup::make([
            BulkAction::make('send_receipt')
                ->label('Send Receipts')
                ->icon('heroicon-o-envelope')
                ->requiresConfirmation()
                ->visible(fn () => Auth::user()?->hasRole('Superadmin') || Auth::user()?->hasPermissionTo('view-donation'))
                ->action(function ($records) {
                    $sent = 0;
                    foreach ($records as $donation) {
                        try {
                            Mail::to($donation->customer->email)->send(new DonationConfirmed($donation));
                            $sent++;
                        } catch (Throwable $e) {
                            Log::error($e);
                        }
                    }
                    Notification::make()->title($sent . ' receipts sent')->success()->send();
                }),

            BulkAction::make('send_to_engage')
                ->label('Send to Engage')
                ->icon('heroicon-o-arrow-up-on-square')
                ->visible(fn () => Auth::user()?->hasRole('Superadmin') || Auth::user()?->hasPermissionTo('view-donation'))
                ->action(function ($records) {
                    foreach ($records as $donation) {
                        dispatch(new SendDonation($donation));
                    }
                    Notification::make()->title(count($records) . ' sent to Engage')->success()->send();
                }),
        ]);
    }

    // ─── Filters (drill-down within tabs) ───────────────────────

    private static function getTableFilters(): array
    {
        return [
            SelectFilter::make('donation_type_id')
                ->label('Cause')
                ->options(fn () => DonationType::orderBy('display_name')->pluck('display_name', 'id'))
                ->searchable(),

            SelectFilter::make('donation_country_id')
                ->label('Country')
                ->options(fn () => DonationCountry::orderBy('name')->pluck('name', 'id'))
                ->searchable(),

            Filter::make('date_range')
                ->form([
                    DatePicker::make('from')->label('From'),
                    DatePicker::make('to')->label('To'),
                ])
                ->query(function (Builder $query, array $data): Builder {
                    return $query
                        ->when($data['from'], fn (Builder $q) => $q->whereDate('created_at', '>=', $data['from']))
                        ->when($data['to'], fn (Builder $q) => $q->whereDate('created_at', '<=', $data['to']));
                })
                ->columns(2),
        ];
    }
}