//
//  GenderSelectPopVC.swift
//  QuickLocation
//

import UIKit

final class GenderSelectPopVC: DLCustomPopVC {

    var onConfirm: ((Int) -> Void)?

    private var selectedSex: Int
    private let options: [(sex: Int, title: String, on: String, off: String)] = [
        (1, "男", "MemberInfo/gender_male_on", "MemberInfo/gender_male_off"),
        (2, "女", "MemberInfo/gender_female_on", "MemberInfo/gender_female_off"),
        (0, "保密", "MemberInfo/gender_secret_on", "MemberInfo/gender_secret_off")
    ]

    private var optionButtons: [UIButton] = []

    init(currentSex: Int, onConfirm: ((Int) -> Void)? = nil) {
        self.selectedSex = currentSex
        self.onConfirm = onConfirm
        super.init(nibName: nil, bundle: nil)
        popStyle = .bottom
        bottomCornerRadius = 40
        dimmingClick = true
    }

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

    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
        refreshSelection()
    }

    private func setupUI() {
        let headerBgImage = UIImageView()
        headerBgImage.image = UIImage(named: "Common/popup_header_bg")
        headerBgImage.contentMode = .scaleToFill
        contentView.addSubview(headerBgImage)
        headerBgImage.isUserInteractionEnabled = false
        headerBgImage.layoutChain
            .top()
            .edgesHorzontal()
            .heightToWidth(120 / 375)
        
        let titleLab = UILabel()
        titleLab.text = "性别"
        titleLab.font = .systemFont(ofSize: 18, weight: .semibold)
        titleLab.textColor = UIColor(hexStr: "#293445")
        contentView.addSubview(titleLab)
        titleLab.layoutChain.top(22).centerX()

        let closeBtn = UIButton(type: .custom)
        closeBtn.setImage(UIImage(named: "MemberInfo/close_circle"), for: .normal)
        closeBtn.addTarget(self, action: #selector(close), for: .touchUpInside)
        contentView.addSubview(closeBtn)
        closeBtn.layoutChain.right(16).centerY(titleLab).width(28).height(28)

        let row = UIStackView()
        row.axis = .horizontal
        row.alignment = .fill
        row.distribution = .fillEqually
        row.spacing = 16
        contentView.addSubview(row)
        row.layoutChain
            .topToBottomOfView(titleLab, offset: 24)
            .left(28)
            .right(28)
            .height(100)

        for (index, option) in options.enumerated() {
            let item = makeOption(option, tag: index)
            optionButtons.append(item.button)
            row.addArrangedSubview(item.wrap)
        }
        contentView.bringSubviewToFront(row)

        let confirm = UIButton(type: .custom)
        confirm.setTitle("确 定", for: .normal)
        confirm.setTitleColor(.white, for: .normal)
        confirm.titleLabel?.font = FontManager.boboBold(18)
        confirm.setBackgroundImage(UIImage(named: "Common/button_bg_2"), for: .normal)
        confirm.layer.cornerRadius = 20
        confirm.clipsToBounds = true
        confirm.addTarget(self, action: #selector(confirmTapped), for: .touchUpInside)
        contentView.addSubview(confirm)
        confirm.layoutChain
            .topToBottomOfView(row, offset: 22)
            .left(30)
            .right(30)
            .height(50)
            .bottom(16 + kSafeBottomMargin)

        let height = 22 + 28 + 24 + 100 + 22 + 50 + 16 + kSafeBottomMargin
        contentBgView.layoutChain.height(height)
        contentView.layoutChain.height(height)
        view.layoutIfNeeded()
    }

    private func makeOption(
        _ option: (sex: Int, title: String, on: String, off: String),
        tag: Int
    ) -> (wrap: UIView, button: UIButton) {
        let wrap = UIControl()
        wrap.tag = tag
        wrap.addTarget(self, action: #selector(tapOption(_:)), for: .touchUpInside)
        let button = UIButton(type: .custom)
        button.isUserInteractionEnabled = false
        button.tag = tag
        button.backgroundColor = UIColor(hexStr: "#F5F6F8")
        button.layer.cornerRadius = 16
        button.clipsToBounds = true
        wrap.addSubview(button)
        button.layoutChain.top().centerX().width(72).height(72)

        let lab = UILabel()
        lab.text = option.title
        lab.font = .systemFont(ofSize: 14, weight: .medium)
        lab.textColor = UIColor(hexStr: "#293445")
        lab.textAlignment = .center
        wrap.addSubview(lab)
        lab.layoutChain.topToBottomOfView(button, offset: 8).centerX()
        return (wrap, button)
    }

    private func refreshSelection() {
        for (index, button) in optionButtons.enumerated() {
            let option = options[index]
            let selected = selectedSex == option.sex
            button.layer.borderWidth = selected ? 1.5 : 0
            button.layer.borderColor = UIColor(hexStr: "#16B3FF").cgColor
            let name = selected ? option.on : option.off
            button.setImage(UIImage(named: name), for: .normal)
        }
    }

    @objc private func tapOption(_ sender: UIControl) {
        guard options.indices.contains(sender.tag) else { return }
        selectedSex = options[sender.tag].sex
        refreshSelection()
    }

    @objc private func confirmTapped() {
        let sex = selectedSex
        dismiss(animated: true) { [weak self] in
            self?.onConfirm?(sex)
        }
    }

    @objc private func close() {
        dismiss(animated: true)
    }
}

private final class GenderPopGradientView: UIView {
    override class var layerClass: AnyClass { CAGradientLayer.self }

    override init(frame: CGRect) {
        super.init(frame: frame)
        isUserInteractionEnabled = false
        guard let gradient = layer as? CAGradientLayer else { return }
        gradient.colors = [
            UIColor(hexStr: "#BAF4FF").cgColor,
            UIColor(hexStr: "#BAF4FF", alpha: 0).cgColor
        ]
        gradient.startPoint = CGPoint(x: 0.5, y: 0)
        gradient.endPoint = CGPoint(x: 0.5, y: 1)
    }

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