//
//  SPEpisodeMenuView.swift
//  Thimra
//
//  Created by 曾觉新 on 2025/4/17.
//

import UIKit

class SPEpisodeMenuView: UIView {
    
    override var intrinsicContentSize: CGSize {
        return CGSize(width: kSPScreenWidth, height: 30)
    }
    
    var didSelectedIndex: ((_ index: Int) -> Void)?
    
    var dataArr: [String] = [] {
        didSet {
            self.reloadData()
        }
    }
    
    var selectedIndex: Int = 0 {
        didSet {
            self.buttonArr.forEach {
                $0.isSelected = $0.tag == selectedIndex
            }
            self.progressSlide()
        }
    }
    
    
    private lazy var buttonArr: [UIButton] = []
    
    //MARK: UI属性
    private lazy var progressView: UIView = {
        let view = UIView()
        view.backgroundColor = .colorFF0000()
//        view.colors = [UIColor.colorF56490().cgColor, UIColor.colorBF6BFF().cgColor]
//        view.startPoint = .init(x: 0, y: 0.5)
//        view.endPoint = .init(x: 1, y: 0.5)
//        view.locations = [0, 1]
        return view
    }()
    
    private lazy var scrollView: SPScrollView = {
        let scrollView = SPScrollView()
        scrollView.showsVerticalScrollIndicator = false
        scrollView.showsHorizontalScrollIndicator = false
        return scrollView
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        _setupUI()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    private func reloadData() {
        buttonArr.forEach {
            $0.removeFromSuperview()
        }
        buttonArr.removeAll()
        
        let count = self.dataArr.count
        
        var previousButton: UIButton?
        
        dataArr.enumerated().forEach {
            let normalStrig = NSMutableAttributedString(string: $1)
            normalStrig.color = .colorFFFFFF()
            normalStrig.font = .fontMedium(ofSize: 12)
            
//            let selectedString = NSMutableAttributedString(string: $1)
//            selectedString.color = .colorF564B6()
//            selectedString.font = .fontMedium(ofSize: 14)
            
            
            let button = UIButton(type: .custom)
            button.tag = $0
            button.setAttributedTitle(normalStrig, for: .normal)
//            button.setAttributedTitle(selectedString, for: .selected)
//            button.setAttributedTitle(selectedString, for: [.selected, .highlighted])
            button.addTarget(self, action: #selector(handleButton), for: .touchUpInside)
            button.isSelected = $0 == selectedIndex
            
            self.scrollView.addSubview(button)
            self.buttonArr.append(button)
            
            if previousButton == nil {
                button.snp.makeConstraints { make in
                    make.top.left.equalToSuperview()
                    make.height.equalTo(30)
                }
            } else if let previousButton = previousButton, count - 1 == $0 {
                button.snp.makeConstraints { make in
                    make.top.equalToSuperview()
                    make.left.equalTo(previousButton.snp.right).offset(25)
                    make.height.equalTo(30)
                    make.right.equalToSuperview()
                }
            } else if let previousButton = previousButton {
                button.snp.makeConstraints { make in
                    make.top.equalToSuperview()
                    make.left.equalTo(previousButton.snp.right).offset(25)
                    make.height.equalTo(30)
                }
            }
            
            previousButton = button
        }
        
        progressSlide()
    }
    
    private func progressSlide() {
        if self.selectedIndex >= self.buttonArr.count { return }
        let currentButton = self.buttonArr[self.selectedIndex]
        
        self.progressView.snp.remakeConstraints { make in
            make.bottom.width.equalTo(currentButton)
            make.centerX.equalTo(currentButton)
            make.height.equalTo(2)
        }
    }
    
    
    @objc private func handleButton(sender: UIButton) {
        self.selectedIndex = sender.tag
        self.didSelectedIndex?(self.selectedIndex)
    }
}

extension SPEpisodeMenuView {
    
    private func _setupUI() {
        addSubview(scrollView)
        scrollView.addSubview(progressView)
        
        scrollView.snp.makeConstraints { make in
            make.left.right.top.equalToSuperview()
            make.bottom.equalToSuperview()
        }
    }
    
}