<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Models\AiModel;
use App\Models\AiProvider;
use App\Services\ChatService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class ChatController extends Controller
{
    public function __construct(
        private readonly ChatService $chatService
    ) {}

    public function index(): View
    {
        $providers = AiProvider::where('is_active', true)
            ->orderBy('name')
            ->get();

        $history = $this->chatService->getHistory();

        $defaultProviderId = 1;
        $defaultModelId = 2;

        return view('chat.index', compact('providers', 'history', 'defaultProviderId', 'defaultModelId'));
    }

    public function send(Request $request): JsonResponse
    {
        $request->validate([
            'message' => 'required|string',
            'provider_id' => 'required|exists:ai_providers,id',
            'model_id' => 'required|exists:ai_models,id',
            'temperature' => 'nullable|numeric|min:0|max:1',
            'max_tokens' => 'nullable|integer|min:1|max:128000',
        ]);

        $provider = AiProvider::where('id', $request->provider_id)
            ->where('is_active', true)
            ->firstOrFail();

        $model = AiModel::where('id', $request->model_id)
            ->where('provider_id', $provider->id)
            ->where('is_active', true)
            ->firstOrFail();

        $result = $this->chatService->sendMessage(
            userMessage: $request->message,
            provider: $provider,
            model: $model,
            temperature: (float) ($request->temperature ?? 0.7),
            maxTokens: (int) ($request->max_tokens ?? 8192),
        );

        return response()->json($result);
    }

    public function reset(): RedirectResponse
    {
        $this->chatService->reset();

        return redirect()->route('chat.index')
            ->with('success', 'Conversa reiniciada.');
    }

    public function getModels(Request $request)
    {
        $request->validate([
            'provider_id' => 'required|exists:ai_providers,id',
        ]);

        $models = AiModel::where('provider_id', $request->provider_id)
            ->where('is_active', true)
            ->orderBy('name')
            ->get(['id', 'name', 'slug']);

        return response()->json($models);
    }
}