<?php

namespace App\Http\Controllers\API;

use Illuminate\Support\Facades\DB;
use Intervention\Image\Facades\Image;

class ImageVerificationController
{
    public function GetCode()
    {
// 可用字符（排除 0, o, O, i, I, l, 1）
        $characters = '23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz';
        $length = 4;
        $captcha = '';

        for ($i = 0; $i < $length; $i++) {
            $captcha .= $characters[rand(0, strlen($characters) - 1)];
        }

        // 创建画布：宽120，高40，背景白色
        $width = 160;
        $height = 70;
        $image = Image::canvas($width, $height, '#ffffff');

        // 使用 GD 内置字体（无需 .ttf 文件）
        // font(5) 表示使用内置字体大小 5（最大）
        $image->text($captcha, $width / 2, $height / 2, function ($font) {
            $font->file(public_path('COOPBL.TTF'));
            $font->size(40); // GD 内置字体只支持 1-5
            $font->color('#000000');
            $font->align('center');
            $font->valign('middle');
        });

        // 添加干扰点（杂色）
        for ($i = 0; $i < 150; $i++) {
            $x = rand(0, $width);
            $y = rand(0, $height);
            $color = '#' . str_pad(dechex(rand(0, 0xFFFFFF)), 6, '0', STR_PAD_LEFT);
            $image->pixel($color, $x, $y);
        }

        for ($i = 0; $i < 3; $i++) {
            $image->line(
                rand(0, $width), rand(0, $height),
                rand(0, $width), rand(0, $height),
                function ($draw) {
                    $draw->color('#' . str_pad(dechex(rand(0, 0xFFFFFF)), 6, '0', STR_PAD_LEFT));
                    // 移除了设置宽度的部分
                }
            );
        }

        // 转为 Base64
        $base64 = 'data:image/png;base64,' . base64_encode($image->encode('png'));
        $id=DB::table('yanzhengma_image')->insertGetId([
            'code' => $captcha,
            'end_time' => date('Y-m-d H:i:s', strtotime('+5 minutes')),
            'created_at' => date('Y-m-d H:i:s'),
        ]);
        if($id){
            return \Yz::Return(true,'获取成功',[
                'image' => $base64,
                'code_id' => $id,
                // 注意：生产环境不要返回明文验证码！仅用于调试
                //'debug_captcha' => $captcha,
            ]);
        }else{
            return \Yz::echoError1('验证码获取失败');
        }


    }
    public function CheckCode(){
        $code_id = request('code_id');
        $code = request('code');
        $check=DB::table('yanzhengma_image')
            ->where('id',$code_id)
            ->where('code',$code)
            ->where('end_time','>',date('Y-m-d H:i:s'))
            ->where('status','1')
            ->update([
                'status'=>'2'
            ]);
        if($check){
            return \Yz::Return(true,'验证成功');
        }else{
            return \Yz::echoError1('验证码无效');
        }
    }
}