<?php

declare(strict_types=1);

namespace OCA\Astrolabe\Settings;

use OCA\Astrolabe\AppInfo\Application;
use OCA\Astrolabe\Service\McpServerClient;
use OCP\AppFramework\Http\TemplateResponse;
use OCP\AppFramework\Services\IInitialState;
use OCP\IConfig;
use OCP\Settings\ISettings;

/**
 * Admin settings panel for Astrolabe.
 *
 * Displays semantic search service status, indexing metrics,
 * configuration, and provides administrative controls.
 */
class Admin implements ISettings {
	// Search settings keys and defaults
	public const SETTING_SEARCH_ALGORITHM = 'search_algorithm';
	public const SETTING_SEARCH_FUSION = 'search_fusion';
	public const SETTING_SEARCH_SCORE_THRESHOLD = 'search_score_threshold';
	public const SETTING_SEARCH_LIMIT = 'search_limit';

	public const DEFAULT_SEARCH_ALGORITHM = 'hybrid';
	public const DEFAULT_SEARCH_FUSION = 'rrf';
	public const DEFAULT_SEARCH_SCORE_THRESHOLD = 0;
	public const DEFAULT_SEARCH_LIMIT = 20;

	private $client;
	private $config;
	private $initialState;

	public function __construct(
		McpServerClient $client,
		IConfig $config,
		IInitialState $initialState,
	) {
		$this->client = $client;
		$this->config = $config;
		$this->initialState = $initialState;
	}

	/**
	 * @return TemplateResponse
	 */
	public function getForm(): TemplateResponse {
		// Get configuration from config.php (local, fast)
		$serverUrl = $this->config->getSystemValue('mcp_server_url', '');
		$apiKeyConfigured = !empty($this->config->getSystemValue('mcp_server_api_key', ''));
		$clientId = $this->config->getSystemValue('astrolabe_client_id', '');
		$clientIdConfigured = !empty($clientId);
		$clientSecret = $this->config->getSystemValue('astrolabe_client_secret', '');
		$clientSecretConfigured = !empty($clientSecret);

		// Load search settings from app config
		$searchSettings = [
			'algorithm' => $this->config->getAppValue(
				Application::APP_ID,
				self::SETTING_SEARCH_ALGORITHM,
				self::DEFAULT_SEARCH_ALGORITHM
			),
			'fusion' => $this->config->getAppValue(
				Application::APP_ID,
				self::SETTING_SEARCH_FUSION,
				self::DEFAULT_SEARCH_FUSION
			),
			'scoreThreshold' => (int)$this->config->getAppValue(
				Application::APP_ID,
				self::SETTING_SEARCH_SCORE_THRESHOLD,
				(string)self::DEFAULT_SEARCH_SCORE_THRESHOLD
			),
			'limit' => (int)$this->config->getAppValue(
				Application::APP_ID,
				self::SETTING_SEARCH_LIMIT,
				(string)self::DEFAULT_SEARCH_LIMIT
			),
		];

		// Provide initial state for Vue.js frontend
		// MCP server data will be fetched asynchronously by Vue component
		$this->initialState->provideInitialState('admin-config', [
			'config' => [
				'serverUrl' => $serverUrl,
				'apiKeyConfigured' => $apiKeyConfigured,
				'clientIdConfigured' => $clientIdConfigured,
				'clientSecretConfigured' => $clientSecretConfigured,
			],
			'searchSettings' => $searchSettings,
		]);

		$parameters = [];

		return new TemplateResponse(
			Application::APP_ID,
			'settings/admin',
			$parameters,
			TemplateResponse::RENDER_AS_BLANK
		);
	}

	/**
	 * @return string The section ID
	 */
	public function getSection(): string {
		return 'astrolabe';
	}

	/**
	 * @return int Priority (lower = higher up)
	 */
	public function getPriority(): int {
		return 10;
	}
}