<?php

namespace App\Controllers;

use App\Models\Session;

class SessionController
{
    public static function index(): void
    {
        $user = $GLOBALS['auth_user'];
        $sessions = Session::findByUserId($user['userId']);
        echo json_encode(['success' => true, 'data' => $sessions]);
    }

    public static function create(): void
    {
        $input = json_decode(file_get_contents('php://input'), true);
        $user = $GLOBALS['auth_user'];

        $data = [
            'user_id' => $user['userId'],
            'name' => $input['name'] ?? '新会话',
            'provider' => $input['provider'] ?? 'newapi',
            'model' => $input['model'] ?? 'gpt-3.5-turbo',
            'system_prompt' => $input['system_prompt'] ?? '',
            'thinking_mode' => $input['thinking_mode'] ?? false,
        ];

        if (isset($input['personality_id'])) {
            $data['personality_id'] = $input['personality_id'];
        }

        $session = Session::create($data);
        echo json_encode(['success' => true, 'data' => $session]);
    }

    public static function update(int $id): void
    {
        $session = Session::findById($id);
        if (!$session) {
            http_response_code(404);
            echo json_encode(['success' => false, 'message' => '会话不存在']);
            return;
        }

        $user = $GLOBALS['auth_user'];
        if ($session['user_id'] != $user['userId']) {
            http_response_code(404);
            echo json_encode(['success' => false, 'message' => '会话不存在']);
            return;
        }

        $input = json_decode(file_get_contents('php://input'), true);

        $allowedFields = ['name', 'provider', 'model', 'system_prompt', 'personality_id', 'thinking_mode'];
        $data = [];
        foreach ($allowedFields as $field) {
            if (isset($input[$field])) {
                $data[$field] = $input[$field];
            }
        }

        Session::update($id, $data);
        $updatedSession = Session::findById($id);
        echo json_encode(['success' => true, 'data' => $updatedSession]);
    }

    public static function delete(int $id): void
    {
        $session = Session::findById($id);
        if (!$session) {
            http_response_code(404);
            echo json_encode(['success' => false, 'message' => '会话不存在']);
            return;
        }

        $user = $GLOBALS['auth_user'];
        if ($session['user_id'] != $user['userId']) {
            http_response_code(404);
            echo json_encode(['success' => false, 'message' => '会话不存在']);
            return;
        }

        Session::delete($id);
        echo json_encode(['success' => true, 'message' => '删除成功']);
    }
}