//
//  ScanView.swift
//  QuickLocation
//
//  Created by 八条 on 2026/6/2.
//

import UIKit
import RxSwift
import RxCocoa
import AVFoundation

class ScanView: UIView {

    var disposeBag = DisposeBag()
    
    private func setupRx() {
        backBtn.rx.tap.subscribe(onNext: { _ in
            AppRouter.shared.popOrDismiss()
        }).disposed(by: disposeBag)
        
        torchBtn.rx.tap.subscribe(onNext: { _ in
            guard let device = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back) else { return }
            do {
                try device.lockForConfiguration()
                device.torchMode = device.torchMode == .on ? .off : .on
                device.unlockForConfiguration()
            } catch {
                DLToast.show(text: "闪光灯开启失败")
            }
        }).disposed(by: disposeBag)
    }
    
    private func setupUI() {
        addSubview(navBarView)
        navBarView.addSubview(backBtn)
        navBarView.addSubview(torchBtn)
        
        addSubview(scanBoxView)
        scanBoxView.addSubview(scanImgView)
        scanBoxView.addSubview(scanLineView)
        
        navBarView.layoutChain
            .edges(excludingEdge: .bottom)
            .height(kNaviHeight)
        
        backBtn.layoutChain
            .top(kStatusBarHeight + 12)
            .left(15)
            .width(35)
            .height(24)
        
        torchBtn.layoutChain
            .centerY(backBtn)
            .right(15)
            .width(100)
            .height(24)
        
        scanBoxView.layoutChain
            .centerY()
            .edgesHorzontal(35)
            .heightToWidth(1)
        
        scanImgView.layoutChain.edges()
        
        // scanLineView 用 frame 动画，不设置 AutoLayout
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        scanLineView.frame = CGRect(x: 5, y: 0, width: scanBoxView.bounds.width - 10, height: 2)
    }
    
    lazy var navBarView: UIView = {
        let view = UIView()
        view.backgroundColor = .clear
        return view
    }()
    
    lazy var backBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.setTitle("取消", for: .normal)
        btn.setTitleColor(.white, for: .normal)
        btn.titleLabel?.font = .systemFont(ofSize: 16, weight: .medium)
        btn.extendEdgeInsets = UIEdgeInsets(top: 54, left: 15, bottom: 100, right: 100)
        return btn
    }()
    
    lazy var torchBtn: UIButton = {
        let btn = UIButton(type: .custom)
        btn.setTitle("打开手电筒", for: .normal)
        btn.setTitleColor(.white, for: .normal)
        btn.titleLabel?.font = .systemFont(ofSize: 16, weight: .medium)
        btn.extendEdgeInsets = UIEdgeInsets(top: 54, left: 15, bottom: 100, right: 100)
        return btn
    }()
    
    lazy var scanBoxView: UIView = {
        let view = UIView()
        view.backgroundColor = .clear
        return view
    }()
    
    lazy var scanImgView: UIImageView = {
        let view = UIImageView()
        view.backgroundColor = .clear
        view.image = UIImage(named: "Scan/scan")
        view.contentMode = .scaleAspectFill
        return view
    }()
    
    lazy var scanLineView: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(hexStr: "#16B3FF")
        return view
    }()
    
    override init(frame: CGRect) {
        super.init(frame: .zero)
        backgroundColor = .clear
        setupUI()
        setupRx()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}