<?php

declare(strict_types=1);

namespace OCA\AnalyticsHub\Controller;

use OCP\IRequest;
use OCP\IConfig;
use OCP\AppFramework\Http\TemplateResponse;
use OCP\AppFramework\Http\JSONResponse;

/**
 * Admin Settings Controller
 *
 * @NoAdminRequired
 * @NoCSRFRequired
 */
class AdminController {

    protected $appName;
    protected $request;
    protected $config;

    public function __construct(string $appName, IRequest $request, IConfig $config) {
        $this->appName = $appName;
        $this->request = $request;
        $this->config = $config;
    }

    /**
     * Load configuration
     */
    public function load(): JSONResponse {
        $clientId = $this->config->getAppValue('analyticshub', 'google_client_id', '');
        $apiKey = $this->config->getAppValue('analyticshub', 'anthropic_api_key', '');
        $llmEndpoint = $this->config->getAppValue('analyticshub', 'llm_api_endpoint', '');
        $llmModel = $this->config->getAppValue('analyticshub', 'llm_model', '');
        $refreshToken = $this->config->getAppValue('analyticshub', 'google_refresh_token', '');

        // Check if configured
        $isConfigured = !empty($clientId) && !empty($apiKey) && !empty($refreshToken);

        // Mask sensitive values for display
        $maskedApiKey = '';
        if (!empty($apiKey)) {
            $maskedApiKey = substr($apiKey, 0, 8) . '...' . substr($apiKey, -4);
        }

        $maskedRefreshToken = '';
        if (!empty($refreshToken)) {
            $maskedRefreshToken = substr($refreshToken, 0, 10) . '...';
        }

        return new JSONResponse([
            'success' => true,
            'data' => [
                'google_client_id' => $clientId,
                'google_refresh_token' => $maskedRefreshToken,
                'llm_api_endpoint' => $llmEndpoint,
                'llm_model' => $llmModel,
                'anthropic_api_key' => $maskedApiKey,
                'is_configured' => $isConfigured,
            ],
        ]);
    }

    /**
     * Save configuration
     */
    public function save(): JSONResponse {
        $data = json_decode($this->request->getRawBody(), true);

        if (!$data) {
            return new JSONResponse([
                'success' => false,
                'error' => 'Invalid request body',
            ], 400);
        }

        $clientId = $data['google_client_id'] ?? '';
        $clientSecret = $data['google_client_secret'] ?? '';
        $refreshToken = $data['google_refresh_token'] ?? '';
        $apiKey = $data['anthropic_api_key'] ?? '';
        $llmEndpoint = $data['llm_api_endpoint'] ?? '';
        $llmModel = $data['llm_model'] ?? '';

        if (empty($clientId) || empty($clientSecret) || empty($apiKey)) {
            return new JSONResponse([
                'success' => false,
                'error' => 'Missing required fields',
            ], 400);
        }

        // Save configuration
        $this->config->setAppValue('analyticshub', 'google_client_id', $clientId);
        $this->config->setAppValue('analyticshub', 'google_client_secret', $clientSecret);

        if (!empty($refreshToken)) {
            $this->config->setAppValue('analyticshub', 'google_refresh_token', $refreshToken);
        }

        if (!empty($llmEndpoint)) {
            $this->config->setAppValue('analyticshub', 'llm_api_endpoint', $llmEndpoint);
        }

        if (!empty($llmModel)) {
            $this->config->setAppValue('analyticshub', 'llm_model', $llmModel);
        }

        $this->config->setAppValue('analyticshub', 'anthropic_api_key', $apiKey);

        // Check if fully configured
        $isConfigured = !empty($clientId) && !empty($clientSecret) && !empty($apiKey) && !empty($refreshToken);

        return new JSONResponse([
            'success' => true,
            'data' => [
                'is_configured' => $isConfigured,
            ],
        ]);
    }
}