<?php

namespace App\Http\Controllers\Api\V1;

use App\Http\Controllers\Controller;
use App\Models\ServiceToken;
use App\Services\ServiceTokenService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;

/**
 * ServiceTokenController - API endpoints for service token management
 * 
 * Provides REST API for CRUD operations on service tokens.
 * All endpoints require authentication via LDAP or API token.
 */
class ServiceTokenController extends Controller
{
    public function __construct(
        private ServiceTokenService $serviceTokenService
    ) {}

    /**
     * List all service tokens
     * 
     * GET /api/v1/service-tokens
     */
    public function index(): JsonResponse
    {
        $tokens = $this->serviceTokenService->listAll();

        return response()->json([
            'data' => array_map(fn ($token) => [
                'id' => $token->id,
                'name' => $token->name,
                'service' => $token->service,
                'token_prefix' => $token->token_prefix,
                'is_active' => $token->is_active,
                'expires_at' => $token->expires_at?->toIso8601String(),
                'created_by' => $token->created_by,
                'created_at' => $token->created_at->toIso8601String(),
                'last_used_at' => $token->last_used_at?->toIso8601String(),
                'is_expired' => $token->isExpired(),
            ], $tokens),
        ]);
    }

    /**
     * Create a new service token
     * 
     * POST /api/v1/service-tokens
     * 
     * @bodyParam name string required Token name (e.g., "GeoNetAgent-Production")
     * @bodyParam service string required Service name (e.g., "GeoNetAgent", "Databaselist")
     * @bodyParam expires_in_days int optional Expiration in days (null = never expires)
     */
    public function store(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'name' => 'required|string|max:100',
            'service' => 'required|string|max:50',
            'expires_in_days' => 'nullable|integer|min:1',
        ]);

        $result = $this->serviceTokenService->create(
            name: $validated['name'],
            service: $validated['service'],
            expiresInDays: $validated['expires_in_days'] ?? null
        );

        return response()->json([
            'data' => [
                'id' => $result['model']->id,
                'name' => $result['model']->name,
                'service' => $result['model']->service,
                'token_prefix' => $result['model']->token_prefix,
                'token' => $result['token'], // Only shown once on creation
                'is_active' => $result['model']->is_active,
                'expires_at' => $result['model']->expires_at?->toIso8601String(),
                'created_by' => $result['model']->created_by,
                'created_at' => $result['model']->created_at->toIso8601String(),
            ],
            'message' => 'Service token created successfully. Save the token securely as it will not be shown again.',
        ], 201);
    }

    /**
     * Get a specific service token
     * 
     * GET /api/v1/service-tokens/{id}
     */
    public function show(string $id): JsonResponse
    {
        $token = $this->serviceTokenService->getById($id);

        if (!$token) {
            return response()->json([
                'error' => [
                    'code' => 'NOT_FOUND',
                    'message' => 'Service token not found',
                ],
            ], 404);
        }

        return response()->json([
            'data' => [
                'id' => $token->id,
                'name' => $token->name,
                'service' => $token->service,
                'token_prefix' => $token->token_prefix,
                'is_active' => $token->is_active,
                'expires_at' => $token->expires_at?->toIso8601String(),
                'created_by' => $token->created_by,
                'created_at' => $token->created_at->toIso8601String(),
                'last_used_at' => $token->last_used_at?->toIso8601String(),
                'is_expired' => $token->isExpired(),
            ],
        ]);
    }

    /**
     * Revoke a service token (deactivate)
     * 
     * POST /api/v1/service-tokens/{id}/revoke
     */
    public function revoke(string $id): JsonResponse
    {
        $token = $this->serviceTokenService->getById($id);

        if (!$token) {
            return response()->json([
                'error' => [
                    'code' => 'NOT_FOUND',
                    'message' => 'Service token not found',
                ],
            ], 404);
        }

        $this->serviceTokenService->revoke($token);

        return response()->json([
            'message' => 'Service token revoked successfully',
        ]);
    }

    /**
     * Regenerate a service token (create new, revoke old)
     * 
     * POST /api/v1/service-tokens/{id}/regenerate
     * 
     * @bodyParam expires_in_days int optional New expiration in days
     */
    public function regenerate(Request $request, string $id): JsonResponse
    {
        $validated = $request->validate([
            'expires_in_days' => 'nullable|integer|min:1',
        ]);

        $token = $this->serviceTokenService->getById($id);

        if (!$token) {
            return response()->json([
                'error' => [
                    'code' => 'NOT_FOUND',
                    'message' => 'Service token not found',
                ],
            ], 404);
        }

        $result = $this->serviceTokenService->regenerate(
            oldToken: $token,
            expiresInDays: $validated['expires_in_days'] ?? null
        );

        return response()->json([
            'data' => [
                'id' => $result['model']->id,
                'name' => $result['model']->name,
                'service' => $result['model']->service,
                'token_prefix' => $result['model']->token_prefix,
                'token' => $result['token'], // Only shown once on regeneration
                'is_active' => $result['model']->is_active,
                'expires_at' => $result['model']->expires_at?->toIso8601String(),
                'created_by' => $result['model']->created_by,
                'created_at' => $result['model']->created_at->toIso8601String(),
            ],
            'message' => 'Service token regenerated successfully. Save the new token securely as it will not be shown again.',
        ]);
    }

    /**
     * Delete a service token permanently
     * 
     * DELETE /api/v1/service-tokens/{id}
     */
    public function destroy(string $id): JsonResponse
    {
        $token = $this->serviceTokenService->getById($id);

        if (!$token) {
            return response()->json([
                'error' => [
                    'code' => 'NOT_FOUND',
                    'message' => 'Service token not found',
                ],
            ], 404);
        }

        $this->serviceTokenService->delete($token);

        return response()->json([
            'message' => 'Service token deleted successfully',
        ]);
    }

    /**
     * Get tokens by service
     * 
     * GET /api/v1/service-tokens/by-service/{service}
     */
    public function getByService(string $service): JsonResponse
    {
        $tokens = $this->serviceTokenService->getByService($service);

        return response()->json([
            'data' => array_map(fn ($token) => [
                'id' => $token->id,
                'name' => $token->name,
                'service' => $token->service,
                'token_prefix' => $token->token_prefix,
                'is_active' => $token->is_active,
                'expires_at' => $token->expires_at?->toIso8601String(),
                'created_by' => $token->created_by,
                'created_at' => $token->created_at->toIso8601String(),
                'last_used_at' => $token->last_used_at?->toIso8601String(),
                'is_expired' => $token->isExpired(),
            ], $tokens),
        ]);
    }

    /**
     * Get active tokens only
     * 
     * GET /api/v1/service-tokens/active
     */
    public function getActive(): JsonResponse
    {
        $tokens = $this->serviceTokenService->getActive();

        return response()->json([
            'data' => array_map(fn ($token) => [
                'id' => $token->id,
                'name' => $token->name,
                'service' => $token->service,
                'token_prefix' => $token->token_prefix,
                'is_active' => $token->is_active,
                'expires_at' => $token->expires_at?->toIso8601String(),
                'created_by' => $token->created_by,
                'created_at' => $token->created_at->toIso8601String(),
                'last_used_at' => $token->last_used_at?->toIso8601String(),
            ], $tokens),
        ]);
    }

    /**
     * Get expired tokens
     * 
     * GET /api/v1/service-tokens/expired
     */
    public function getExpired(): JsonResponse
    {
        $tokens = $this->serviceTokenService->getExpired();

        return response()->json([
            'data' => array_map(fn ($token) => [
                'id' => $token->id,
                'name' => $token->name,
                'service' => $token->service,
                'token_prefix' => $token->token_prefix,
                'is_active' => $token->is_active,
                'expires_at' => $token->expires_at?->toIso8601String(),
                'created_by' => $token->created_by,
                'created_at' => $token->created_at->toIso8601String(),
                'last_used_at' => $token->last_used_at?->toIso8601String(),
            ], $tokens),
        ]);
    }
}