<?php

declare(strict_types=1);

namespace App\Filament\Pages\TenantConfiguration;

use App\Filament\Concerns\ResolvesPanelTenantContext;
use App\Models\ManagedEnvironment;
use App\Models\User;
use App\Models\Workspace;
use App\Services\Auth\ManagedEnvironmentAccessScopeResolver;
use App\Services\TenantConfiguration\CoverageV2ReadinessReadModel;
use App\Support\Auth\Capabilities;
use App\Support\Navigation\NavigationScope;
use App\Support\Ui\ActionSurface\ActionSurfaceDeclaration;
use App\Support\Ui\ActionSurface\Enums\ActionSurfaceInspectAffordance;
use App\Support\Ui\ActionSurface\Enums\ActionSurfaceProfile;
use App\Support\Ui\ActionSurface\Enums\ActionSurfaceSlot;
use App\Support\Ui\ActionSurface\Enums\ActionSurfaceType;
use BackedEnum;
use Filament\Facades\Filament;
use Filament\Pages\Page;
use Illuminate\Contracts\Support\Htmlable;
use Illuminate\Database\Eloquent\Model;
use Livewire\Attributes\Locked;
use UnitEnum;

class CoverageV2Readiness extends Page
{
    use ResolvesPanelTenantContext;

    protected static bool $isDiscovered = false;

    protected static bool $shouldRegisterNavigation = false;

    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-shield-check';

    protected static ?int $navigationSort = 4;

    protected static string|UnitEnum|null $navigationGroup = 'Inventory';

    protected static ?string $navigationLabel = 'Coverage v2';

    protected static ?string $slug = 'workspaces/{workspace}/environments/{environment}/tenant-configuration/coverage-v2';

    protected static ?string $title = 'Coverage v2 Readiness';

    protected string $view = 'filament.pages.tenant-configuration.coverage-v2-readiness';

    #[Locked]
    public ?int $environmentId = null;

    public static function actionSurfaceDeclaration(): ActionSurfaceDeclaration
    {
        return ActionSurfaceDeclaration::forPage(ActionSurfaceProfile::ListOnlyReadOnly, ActionSurfaceType::ReadOnlyRegistryReport)
            ->exempt(ActionSurfaceSlot::ListHeader, 'Coverage v2 Readiness is read-only and exposes no page header actions.')
            ->satisfy(ActionSurfaceSlot::InspectAffordance, ActionSurfaceInspectAffordance::PrimaryLinkColumn->value)
            ->withPrimaryLinkColumnReason('Only the primary name/resource column opens the read-only inspect slide-over; full-row click would conflict with dense registry comparison columns.')
            ->exempt(ActionSurfaceSlot::ListRowMoreMenu, 'The surface uses primary link columns for read-only inspect details and no secondary row menu.')
            ->exempt(ActionSurfaceSlot::ListBulkMoreGroup, 'Coverage v2 Readiness does not expose bulk actions.')
            ->satisfy(ActionSurfaceSlot::ListEmptyState, 'Each table has a scoped no-data state for empty Coverage v2 registry or resource rows.');
    }

    public static function canAccess(): bool
    {
        $environment = static::resolveTenantContextForCurrentPanel();
        $user = auth()->user();

        if (! $environment instanceof ManagedEnvironment || ! $user instanceof User) {
            return false;
        }

        return app(ManagedEnvironmentAccessScopeResolver::class)
            ->decision($user, $environment, Capabilities::EVIDENCE_VIEW)
            ->allowed();
    }

    public static function shouldRegisterNavigation(): bool
    {
        return NavigationScope::shouldRegisterEnvironmentNavigation()
            && parent::shouldRegisterNavigation();
    }

    public function mount(Workspace|int|string|null $workspace = null, ManagedEnvironment|int|string|null $environment = null): void
    {
        $resolvedEnvironment = $environment instanceof ManagedEnvironment
            ? $environment
            : static::resolveTenantContextForCurrentPanel();

        if (! $resolvedEnvironment instanceof ManagedEnvironment || ! is_numeric($resolvedEnvironment->workspace_id)) {
            abort(404);
        }

        if ($workspace instanceof Workspace && (int) $workspace->getKey() !== (int) $resolvedEnvironment->workspace_id) {
            abort(404);
        }

        if ((is_int($workspace) || is_string($workspace)) && is_numeric($workspace) && (int) $workspace !== (int) $resolvedEnvironment->workspace_id) {
            abort(404);
        }

        $user = auth()->user();

        if (! $user instanceof User) {
            abort(403);
        }

        $decision = app(ManagedEnvironmentAccessScopeResolver::class)
            ->decision($user, $resolvedEnvironment, Capabilities::EVIDENCE_VIEW);

        if (! $decision->allowed()) {
            abort($decision->denialHttpStatus ?? 403);
        }

        $this->environmentId = (int) $resolvedEnvironment->getKey();
    }

    public function getTitle(): string|Htmlable
    {
        return 'Coverage v2 Readiness';
    }

    public function environment(): ManagedEnvironment
    {
        $environment = ManagedEnvironment::query()
            ->with('workspace')
            ->whereKey($this->environmentId)
            ->first();

        if (! $environment instanceof ManagedEnvironment) {
            abort(404);
        }

        return $environment;
    }

    /**
     * @return array<string, mixed>
     */
    public function readinessSummary(): array
    {
        return app(CoverageV2ReadinessReadModel::class)
            ->summary($this->environment());
    }

    /**
     * @param  array<mixed>  $parameters
     */
    public static function getUrl(array $parameters = [], bool $isAbsolute = true, ?string $panel = null, ?Model $tenant = null): string
    {
        $panelId = $panel ?? Filament::getCurrentOrDefaultPanel()?->getId() ?? 'admin';

        if ($panelId !== 'admin') {
            return parent::getUrl($parameters, $isAbsolute, $panelId, $tenant);
        }

        $environment = static::resolveUrlEnvironment($parameters, $tenant);

        if (! $environment instanceof ManagedEnvironment) {
            return url('/admin');
        }

        $workspace = static::resolveUrlWorkspace($environment, $parameters);

        if (! $workspace instanceof Workspace && ! is_int($workspace) && ! is_string($workspace)) {
            return url('/admin');
        }

        $parameters['environment'] ??= $environment;
        $parameters['workspace'] ??= $workspace;
        unset($parameters['tenant']);

        return parent::getUrl($parameters, $isAbsolute, $panelId, null);
    }

    /**
     * @param  array<mixed>  $parameters
     */
    private static function resolveUrlEnvironment(array $parameters, ?Model $tenant = null): ?ManagedEnvironment
    {
        $parameterTenant = $parameters['tenant'] ?? $parameters['environment'] ?? null;

        if ($parameterTenant instanceof ManagedEnvironment) {
            return $parameterTenant;
        }

        if ($tenant instanceof ManagedEnvironment) {
            return $tenant;
        }

        return static::resolveTenantContextForCurrentPanel();
    }

    /**
     * @param  array<mixed>  $parameters
     */
    private static function resolveUrlWorkspace(ManagedEnvironment $environment, array $parameters): Workspace|string|int|null
    {
        $workspace = $parameters['workspace'] ?? null;

        if ($workspace instanceof Workspace || is_string($workspace) || is_int($workspace)) {
            return $workspace;
        }

        $workspace = $environment->workspace;

        if ($workspace instanceof Workspace) {
            return $workspace;
        }

        return $environment->workspace()->first();
    }
}