<?php

/**
 * ============================================================
 *
 * @project   biiproject
 *
 * @author    Andika Debi Putra
 *
 * @email     andikadebiputra@gmail.com
 *
 * @website   https://biiproject.com
 *
 * @copyright Copyright (c) 2026 Andika Debi Putra
 * @license   Proprietary - All Rights Reserved
 *
 * @version   1.0.0
 *
 * @created   2026-05-01
 * ============================================================
 *
 * Unauthorized copying, modification, distribution, or use
 * of this file is strictly prohibited without prior written
 * permission from the author.
 * ============================================================
 */

namespace App\Services\AI;

use App\Services\SystemConfig\SystemConfigService;

class AiService
{
    protected $systemConfig;

    protected $providers = [];

    public function __construct(SystemConfigService $systemConfig)
    {
        $this->systemConfig = $systemConfig;
    }

    /**
     * Get a provider instance.
     */
    public function provider(?string $identifier = null): AiProviderInterface
    {
        $identifier = $identifier ?: $this->systemConfig->get('ai_provider', 'gpt');

        if (isset($this->providers[$identifier])) {
            return $this->providers[$identifier];
        }

        $config = $this->getProviderConfig($identifier);

        $instance = match ($identifier) {
            'gpt' => new GptProvider($config),
            'gemini' => new GeminiProvider($config),
            'claude' => new ClaudeProvider($config),
            'deepseek' => new OpenAiCompatibleProvider('deepseek', 'https://api.deepseek.com/chat/completions', $config),
            'grok' => new OpenAiCompatibleProvider('grok', 'https://api.x.ai/v1/chat/completions', $config),
            'mistral' => new OpenAiCompatibleProvider('mistral', 'https://api.mistral.ai/v1/chat/completions', $config),
            'openrouter' => new OpenAiCompatibleProvider('openrouter', 'https://openrouter.ai/api/v1/chat/completions', $config),
            'ollama' => new OllamaProvider($config),
            default => throw new \Exception("Unsupported AI provider: {$identifier}"),
        };

        return $this->providers[$identifier] = $instance;
    }

    /**
     * Get configuration for a specific provider from system settings.
     */
    protected function getProviderConfig(string $identifier): array
    {
        return [
            'key' => $this->systemConfig->get("ai_{$identifier}_key"),
            'base_url' => $this->systemConfig->get("ai_{$identifier}_base_url"),
            'default_model' => $this->systemConfig->get('ai_default_model'),
            'instruction' => $this->systemConfig->get('ai_system_instruction'),
            'temperature' => $this->systemConfig->get('ai_temperature', 0.7),
            'max_tokens' => $this->systemConfig->get('ai_max_tokens', 2000),
        ];
    }

    /**
     * Static method to get supported models for each provider.
     */
    public static function getSupportedModels(): array
    {
        return [
            'gpt' => [
                ['id' => 'gpt-4o', 'name' => 'GPT-4o (Newest)'],
                ['id' => 'gpt-4-turbo', 'name' => 'GPT-4 Turbo'],
                ['id' => 'gpt-3.5-turbo', 'name' => 'GPT-3.5 Turbo'],
            ],
            'gemini' => [
                ['id' => 'gemini-1.5-pro', 'name' => 'Gemini 1.5 Pro'],
                ['id' => 'gemini-1.5-flash', 'name' => 'Gemini 1.5 Flash'],
                ['id' => 'gemini-1.0-pro', 'name' => 'Gemini 1.0 Pro'],
            ],
            'claude' => [
                ['id' => 'claude-3-5-sonnet-20240620', 'name' => 'Claude 3.5 Sonnet'],
                ['id' => 'claude-3-opus-20240229', 'name' => 'Claude 3 Opus'],
                ['id' => 'claude-3-sonnet-20240229', 'name' => 'Claude 3 Sonnet'],
                ['id' => 'claude-3-haiku-20240307', 'name' => 'Claude 3 Haiku'],
            ],
            'deepseek' => [
                ['id' => 'deepseek-chat', 'name' => 'DeepSeek Chat'],
                ['id' => 'deepseek-coder', 'name' => 'DeepSeek Coder'],
            ],
            'grok' => [
                ['id' => 'grok-1', 'name' => 'Grok-1'],
            ],
            'mistral' => [
                ['id' => 'mistral-large-latest', 'name' => 'Mistral Large'],
                ['id' => 'mistral-medium-latest', 'name' => 'Mistral Medium'],
                ['id' => 'mistral-small-latest', 'name' => 'Mistral Small'],
            ],
            'openrouter' => [
                ['id' => 'google/gemini-pro-1.5', 'name' => 'Gemini Pro 1.5'],
                ['id' => 'anthropic/claude-3.5-sonnet', 'name' => 'Claude 3.5 Sonnet'],
                ['id' => 'meta-llama/llama-3-70b-instruct', 'name' => 'Llama 3 70B'],
            ],
            'ollama' => [
                ['id' => 'llama3', 'name' => 'Llama 3'],
                ['id' => 'mistral', 'name' => 'Mistral'],
                ['id' => 'phi3', 'name' => 'Phi-3'],
            ],
        ];
    }
}