//
//  StyleButton.swift
//  Crush
//
//  Created by Leon on 2025/7/17.
//

import SwiftyAttributes
import UIKit

enum StyleButtonSize {
    /// height: 32, tls
    case small
    /// height: 40, tlm
    case medium
    /// height: 48, tll
    case large
}

class StyleButton: CLButton {
    var radius: CGFloat = 0
    private var enableBorderColor: UIColor?
    private var disableBorderColor: UIColor?
    private var pressBorderColor: UIColor?

    var text: String? {
        didSet {
            setTitle(text, for: .normal)
        }
    }

    var titleColor: UIColor? {
        didSet {
            setTitleColor(titleColor, for: .normal)
        }
    }

    override var isEnabled: Bool {
        didSet {
            if let enableColor = enableBorderColor, let disableColor = disableBorderColor {
                layer.borderColor = isEnabled ? enableColor.cgColor : disableColor.cgColor
            }
        }
    }

    override var isHighlighted: Bool {
        didSet {
            if let enableColor = enableBorderColor, let pressColor = pressBorderColor {
                layer.borderColor = isHighlighted ? pressColor.cgColor : enableColor.cgColor
            }
        }
    }

    override init(frame: CGRect) {
        super.init(frame: frame)

        backgroundColor = nil
        tintColor = nil
        contentMode = .scaleAspectFill
        titleLabel?.setContentHuggingPriority(UILayoutPriority(248), for: .horizontal)
        //setContentHuggingPriority(UILayoutPriority(248), for: .horizontal)
        setContentCompressionResistancePriority(UILayoutPriority(755), for: .horizontal)
        titleLabel?.adjustsFontSizeToFitWidth = true

        constraints.forEach {
            if $0.firstAttribute == .height {
                removeConstraint($0)
            }
        }
    }

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

    // MARK: - Style Buttons
    public func primary(size: StyleButtonSize) {
        setTitleColor(.c.ctpn, for: .normal)
        setTitleColor(.c.ctpd, for: .disabled)
        setTitleColor(.c.ctpn, for: .highlighted)

//        var configuration = UIButton.Configuration.plain()
//        configuration.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 32, bottom: 0, trailing: 32)
//        self.configuration = configuration

        // 设置状态更新处理
//        configurationUpdateHandler = { [weak self] button in
//            guard self != nil else { return }
//            var updatedConfig = button.configuration ?? UIButton.Configuration.plain()
//
//            // 根据按钮状态设置不同的背景图片
//            switch button.state {
//            case .normal:
//                let gradient = CLSystemToken.gradient(token: .cpgn)
//                let normalBg = gradient.toImage(size: .init(width: 40, height: 10))
//                updatedConfig.background.image = normalBg
//                updatedConfig.background.imageContentMode = .scaleAspectFill
//            case .highlighted:
//                let highlight = CLSystemToken.gradient(token: .cpgp)
//                let pressBg = highlight.toImage(size: .init(width: 40, height: 10))
//                updatedConfig.background.image = pressBg
//                updatedConfig.background.imageContentMode = .scaleAspectFill
//            case .disabled:
//                let disabledImage = UIImage.withColor(color: .c.cpd, size: .init(width: 20, height: 20))
//                updatedConfig.background.image = disabledImage
//                updatedConfig.background.imageContentMode = .scaleAspectFill
//            default:
//                let gradient = CLSystemToken.gradient(token: .cpgn)
//                let normalBg = gradient.toImage(size: .init(width: 40, height: 10))
//                updatedConfig.background.image = normalBg
//            }
//
//            button.configuration = updatedConfig
//        }

        let gradient = CLSystemToken.gradient(token: .cpgn)
        let normalBg = gradient.toImage(size: .init(width: 40, height: 10))
        setBackgroundImage(normalBg, for: .normal)

        let highlight = CLSystemToken.gradient(token: .cpgp)
        let pressBg = highlight.toImage(size: .init(width: 40, height: 10))
        setBackgroundImage(pressBg, for: .highlighted)

        let disabledImage = UIImage.withColor(color: .c.cpd, size: .init(width: 20, height: 20))
        setBackgroundImage(disabledImage, for: .disabled)

        commonDealSize(size: size)
        commonDealSpacing(size: size)

        layoutIfNeeded()
    }

    public func tertiary(size: StyleButtonSize) {
        setTitleColor(.c.ctpn, for: .normal)
        setTitleColor(.c.ctpd, for: .disabled)
        setTitleColor(.c.ctpn, for: .highlighted)

        let normalBg = UIImage.withColor(color: .c.csen, size: .init(width: 10, height: 10))
        setBackgroundImage(normalBg, for: .normal)
        let pressBg = UIImage.withColor(color: .c.csep, size: .init(width: 10, height: 10))
        setBackgroundImage(pressBg, for: .highlighted)
        let disabledImage = UIImage.withColor(color: .c.csed, size: .init(width: 10, height: 10))
        setBackgroundImage(disabledImage, for: .disabled)

        commonDealSize(size: size)
        commonDealSpacing(size: size)

        setNeedsDisplay()
        layoutIfNeeded()
    }

    public func defaultSecondary(size: StyleButtonSize) {
        setTitleColor(.c.cpvn, for: .normal)
        setTitleColor(.c.ctd, for: .disabled)
        setTitleColor(.c.cpvp, for: .highlighted)

        enableBorderColor = .c.cpvn
        disableBorderColor = .c.cpvd
        pressBorderColor = .c.cpvp

        layer.borderWidth = CLSystemToken.border(token: .bs)
        isEnabled = true
        radius = CLSystemToken.radius(token: .rp)
        
        commonDealSize(size: size)
        commonDealSpacing(size: size)

        layoutIfNeeded()
    }

    public func defaultDestructive(size: StyleButtonSize) {
        setTitleColor(.c.ctpn, for: .normal)
        setTitleColor(.c.ctpd, for: .disabled)
        setTitleColor(.c.ctpn, for: .highlighted)

        // iOS 15+设置方法
//        var configuration = UIButton.Configuration.plain()
//        configuration.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 32, bottom: 0, trailing: 32)
//        self.configuration = configuration
//
//        // 设置状态更新处理
//        configurationUpdateHandler = { [weak self] button in
//            guard self != nil else { return }
//            var updatedConfig = button.configuration ?? UIButton.Configuration.plain()
//
//            // 根据按钮状态设置不同的背景图片
//            switch button.state {
//            case .normal:
//                let normalBg = UIImage.withColor(color: .c.cin, size: .init(width: 10, height: 10))
//                updatedConfig.background.image = normalBg
//                updatedConfig.background.imageContentMode = .scaleAspectFill
//            case .highlighted:
//                let pressBg = UIImage.withColor(color: .c.cip, size: .init(width: 10, height: 10))
//                updatedConfig.background.image = pressBg
//                updatedConfig.background.imageContentMode = .scaleAspectFill
//            case .disabled:
//                let disabledImage = UIImage.withColor(color: .c.cid, size: .init(width: 10, height: 10))
//                updatedConfig.background.image = disabledImage
//                updatedConfig.background.imageContentMode = .scaleAspectFill
//            default:
//                let gradient = CLSystemToken.gradient(token: .cin)
//                let normalBg = gradient.toImage(size: .init(width: 40, height: 10))
//                updatedConfig.background.image = normalBg
//            }
//
//            button.configuration = updatedConfig
//        }
        let normalBg = UIImage.withColor(color: .c.cin, size: .init(width: 10, height: 10))
        setBackgroundImage(normalBg, for: .normal)

        let pressBg = UIImage.withColor(color: .c.cip, size: .init(width: 10, height: 10))
        setBackgroundImage(pressBg, for: .highlighted)

        let disabledImage = UIImage.withColor(color: .c.cid, size: .init(width: 10, height: 10))
        setBackgroundImage(disabledImage, for: .disabled)

        commonDealSize(size: size)
        commonDealSpacing(size: size)
        layoutIfNeeded()
    }

    /// 渐变主题色 button
    public func context(size: StyleButtonSize) {
        setTitleColor(.c.csbn, for: .normal)
        setTitleColor(.c.ctpd, for: .disabled)
        setTitleColor(.c.csbp, for: .highlighted)

        // let c = UIColor.c.ccvn
        let gradient = CLSystemToken.gradient(token: .ccvn)
        let normalBg = gradient.toImage(size: CGSize(width: 40, height: 10))
        setBackgroundImage(normalBg, for: .normal)

        commonDealSize(size: size)
        commonDealSpacing(size: size)

        layoutIfNeeded()
    }
    
    public func vip(size: StyleButtonSize){
        setTitleColor(.c.csbn, for: .normal)
        setTitleColor(.c.ctpd, for: .disabled)
        setTitleColor(.c.csbp, for: .highlighted)

        let gradient = CLSystemToken.gradient(token: .ccvn)
        let normalBg = gradient.toImage(size: CGSize(width: 40, height: 10))
        setBackgroundImage(normalBg, for: .normal)

        commonDealSize(size: size)
        commonDealSpacing(size: size)

        layoutIfNeeded()
    }
    
    public func text(size: StyleButtonSize){
        setTitleColor(.c.cpvn, for: .normal)
        setTitleColor(.c.ctd, for: .disabled)
        setTitleColor(.c.cpvp, for: .highlighted)
        
        setBackgroundImage(nil, for: .normal)
        
        commonDealSize(size: size)
        commonDealSpacing(size: size)

        layoutIfNeeded()
    }
    
    public func contrastTertiaryLight(size: StyleButtonSize){
        setTitleColor(.c.ctpn, for: .normal)
        setTitleColor(.c.ctpd, for: .disabled)
        setTitleColor(.c.ctpn, for: .highlighted)

        let normalBg = UIImage.withColor(color: .c.cseln, size: .init(width: 10, height: 10))
        setBackgroundImage(normalBg, for: .normal)
        let pressBg = UIImage.withColor(color: .c.cselp, size: .init(width: 10, height: 10))
        setBackgroundImage(pressBg, for: .highlighted)
        let disabledImage = UIImage.withColor(color: .c.cseld, size: .init(width: 10, height: 10))
        setBackgroundImage(disabledImage, for: .disabled)

        commonDealSize(size: size)
        commonDealSpacing(size: size)

        setNeedsDisplay()
        layoutIfNeeded()
    }
    
    public func contrastTertiaryDark(size: StyleButtonSize){
        setTitleColor(.c.ctpn, for: .normal)
        setTitleColor(.c.ctpd, for: .disabled)
        setTitleColor(.c.ctpn, for: .highlighted)

        let normalBg = UIImage.withColor(color: .c.csedn, size: .init(width: 10, height: 10))
        setBackgroundImage(normalBg, for: .normal)
        let pressBg = UIImage.withColor(color: .c.csedp, size: .init(width: 10, height: 10))
        setBackgroundImage(pressBg, for: .highlighted)
        let disabledImage = UIImage.withColor(color: .c.csedd, size: .init(width: 10, height: 10))
        setBackgroundImage(disabledImage, for: .disabled)

        commonDealSize(size: size)
        commonDealSpacing(size: size)

        setNeedsDisplay()
        layoutIfNeeded()
    }


    // MARK: - Common

    private func commonDealSize(size: StyleButtonSize) {
        switch size {
        case .small:
            let typography = CLSystemToken.typography(token: .tls)
            titleLabel?.font = typography.font
            snp.makeConstraints { make in
                make.height.equalTo(32)
            }
        case .medium:
            let typography = CLSystemToken.typography(token: .tlm)
            titleLabel?.font = typography.font
            snp.makeConstraints { make in
                make.height.equalTo(40)
            }
        case .large:
            let typography = CLSystemToken.typography(token: .tll)
            titleLabel?.font = typography.font
            snp.makeConstraints { make in
                make.height.equalTo(48)
            }
        }
    }

    private func commonDealSpacing(size: StyleButtonSize) {
        switch size {
        case .small:
            contentEdgeInsets = UIEdgeInsets(top: 0, left: 16, bottom: 0, right: 16)
//            var configuration = self.configuration ?? UIButton.Configuration.plain()
//            configuration.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 16, bottom: 0, trailing: 16)
//            self.configuration = configuration
        case .medium:
            contentEdgeInsets = UIEdgeInsets(top: 0, left: 20, bottom: 0, right: 20)
//            var configuration = self.configuration ?? UIButton.Configuration.plain()
//            configuration.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 20, bottom: 0, trailing: 20)
//            self.configuration = configuration
        case .large:
            contentEdgeInsets = UIEdgeInsets(top: 0, left: 32, bottom: 0, right: 32)
//            var configuration = self.configuration ?? UIButton.Configuration.plain()
//            configuration.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 32, bottom: 0, trailing: 32)
//            self.configuration = configuration
        }
    }

    // MARK: layout

    override func layoutSubviews() {
        super.layoutSubviews()
        if radius >= 1 {
            layer.cornerRadius = radius
        } else {
            layer.cornerRadius = bounds.size.height * 0.5
        }
        layer.masksToBounds = true
    }
}