//
//  PickerView.swift
//  HPlusFit
//
//  Created by lemo. on 2019/8/1.
//  Copyright © 2019 lemo. All rights reserved.
//

import UIKit

// MARK:- 常量
fileprivate struct Metric {
    static let backgroundColor = kHexColor(0xFFFFFF)
    static let cancleColor = kHexColor(0xED3131)
    static let confirmColor = kHexColor(0x2C7AFF)
    static let titleColor = kHexColor(0x888888)
    static let generalFont = SystemLightFont(18)
}

enum PikcerType: Int {
    case step, height, weight, birthday, duration, step1
}

class PickerView: UIView {
    
    // 当前选中值
    var currenValues: ((Int) -> ())?
    // 类型
    var type: PikcerType = .height
    private lazy var backgroundView: UIView = {
        let view = UIView().then {
            $0.backgroundColor = .white
            addSubview($0)
        }
        return view
    }()
    private lazy var cancleBtn: UIButton = {
        let btn = UIButton().then {
            $0.setTitle(MultiLanguageKey.cancel.localized, for: .normal)
            $0.setTitleColor(Metric.cancleColor, for: .normal)
            $0.titleLabel?.font = Metric.generalFont
            backgroundView.addSubview($0)
        }
        return btn
    }()
    private lazy var comfirmBtn: UIButton = {
        let btn = UIButton(type: .custom).then {
            $0.setTitle(MultiLanguageKey.confirm.localized, for: .normal)
            $0.setTitleColor(Metric.confirmColor, for: .normal)
            $0.titleLabel?.font = Metric.generalFont
            backgroundView.addSubview($0)
        }
        return btn
    }()
    private lazy var titleLabel: UILabel = {
        let label = UILabel().then {
            $0.font = Metric.generalFont
            $0.textColor = Metric.titleColor
            backgroundView.addSubview($0)
        }
        return label
    }()
    private lazy var pickerView: UIPickerView = {
        let picker = UIPickerView().then {
            $0.delegate = self
            $0.dataSource = self
            backgroundView.addSubview($0)
        }
        return picker
    }()
    private lazy var datePicker: UIDatePicker = {
        let pick = UIDatePicker()
        pick.datePickerMode = .date
        pick.backgroundColor = .white
        pick.locale = Locale(identifier: "zh")
        pick.backgroundColor = ThemeManager.bgColor
        let dayTimestamp: Int64 = 86400
        let seconds: Int64 = Int64(dayTimestamp * 365 * 100)
        pick.minimumDate = Date(timeInterval: -TimeInterval(seconds), since: Date())
        if #available(iOS 13.4, *) {
            pick.preferredDatePickerStyle = .wheels
        } else {
            // Fallback on earlier versions
        }
        // 最大值为当前时间
        pick.maximumDate = Date()
        backgroundView.addSubview(pick)
        return pick
    }()
    // 各类型数据源
    private var dataSource: [[String]] = []
    private lazy var steps: Array = { () -> [[String]] in
        var steps: [String] = []
        for step in stride(from: 3000, to: 100500, by: 500) {
            steps.append(String(step))
        }
        let array: [[String]] = [[], steps, [MultiLanguageKey.stepTip.localized]]
        return array
    }()
    private lazy var steps1: Array = { () -> [[String]] in
        var steps1: [String] = []
        for step1 in stride(from: 5000, to: 51000, by: 1000) {
            steps1.append(String(step1))
        }
        let array1: [[String]] = [[], steps1, [MultiLanguageKey.stepTip.localized]]
        return array1
    }()
    private lazy var heights: Array = { () -> [[String]] in
        var heights: [String] = []
        for height in 90...240 {
            heights.append(String(height))
        }
        let array: [[String]] = [[], heights, ["cm"]]
        return array
    }()
    private lazy var weights: Array = { () -> [[String]] in
        var weights: [String] = []
        for weight in 10...178 {
            weights.append(String(weight))
        }
        let array: [[String]] = [[], weights, ["kg"]]
        return array
    }()
    private lazy var durations: Array = { () -> [[String]] in
        var hours: [String] = []
        for hour in 1...23 {
            hours.append(String(hour))
        }
//        var mins: [String] = []
//        for min in 0...59 {
//            mins.append(String(min))
//        }
//        let array: [[String]] = [hours, [MultiLanguageKey.hour.localized],mins, [MultiLanguageKey.min.localized]]
        let array: [[String]] = [hours, [MultiLanguageKey.hour.localized]]
        return array
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setUpUI()
        handleEvent()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
}

extension PickerView {
    
    /// 展示选择框
    /// - Parameters:
    ///   - values: 值
    ///   - type: 弹出类型
    ///   - view: 视图
    func show(values: Int, type: PikcerType = .height, view: UIView) {
        self.type = type
        switch type {
        case .step, .height, .weight:
            pickerView.isHidden = false
            datePicker.isHidden = true
            switchDataSource(type: type)
            let intervalIndex = dataSource[1].firstIndex(of: "\(values)") ?? 0
            pickerView.selectRow(intervalIndex, inComponent: 1, animated: false)
            
        case .birthday:
            pickerView.isHidden = true
            datePicker.isHidden = false
            let date = Date(timeIntervalSince1970: TimeInterval(values))
            datePicker.setDate(date, animated: false)
            titleLabel.text = MultiLanguageKey.birthday.localized
        case .duration:
            pickerView.isHidden = false
            datePicker.isHidden = true
            switchDataSource(type: type)
            let hourIndex = values
           // let hourIndex = values / 60
           // let minIndex = values % 60
            pickerView.selectRow(hourIndex-1, inComponent: 0, animated: false)
           // pickerView.selectRow(minIndex, inComponent: 2, animated: false)
        case .step1:
            pickerView.isHidden = false
            datePicker.isHidden = true
            switchDataSource(type: type)
            let intervalIndex = dataSource[1].firstIndex(of: "\(values)") ?? 0
            pickerView.selectRow(intervalIndex, inComponent: 1, animated: false)
        }
        animation(isShow: true, view: view)
    }
    
    func dimiss() {
        animation(isShow: false)
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        dimiss()
    }
}

extension PickerView {
    
    fileprivate func setUpUI() {
        backgroundColor = .clear
        frame = CGRect(x: 0, y: 0, width: kScreenW, height: kScreenH - kNavibarH)
        backgroundView.snp.makeConstraints { (make) in
            make.height.equalTo(kScaleHeight(252))
            make.left.right.equalToSuperview()
            make.bottom.equalToSuperview().offset(kScaleHeight(252))
        }
        cancleBtn.snp.makeConstraints { (make) in
            make.left.equalTo(kNavBarItemMargin)
            make.top.equalToSuperview()
            make.height.equalTo(kScaleHeight(50))
            make.width.equalTo(60)
        }
        comfirmBtn.snp.makeConstraints { (make) in
            make.right.equalTo(-kNavBarItemMargin)
            make.top.equalToSuperview()
            make.height.equalTo(kScaleHeight(50))
            make.width.equalTo(60)
        }
        titleLabel.snp.makeConstraints { (make) in
            make.top.equalTo(kScaleHeight(13))
            make.height.equalTo(kScaleHeight(25))
            make.centerX.equalToSuperview()
        }
        pickerView.snp.makeConstraints { (make) in
            make.top.equalTo(kScaleHeight(50))
            make.left.right.bottom.equalToSuperview()
        }
        datePicker.snp.makeConstraints { (make) in
            make.top.equalTo(kScaleHeight(50))
            make.left.right.bottom.equalToSuperview()
        }
    }
    
    fileprivate func handleEvent() {
        cancleBtn.rx.tap
            .subscribe(onNext: { [weak self] in
                self?.dimiss()
            })
            .disposed(by: rx.disposeBag)
        comfirmBtn.rx.tap
            .subscribe(onNext: { [weak self] in
                var value = 0
                guard let `self` = self else { return }
                switch self.type {
                case .step, .height, .weight:
                    value = self.dataSource[1][self.pickerView.selectedRow(inComponent: 1)].integerValue
                case .step1:
                    value = self.dataSource[1][self.pickerView.selectedRow(inComponent: 1)].integerValue
                case .birthday:
                    value = Int(self.datePicker.date.timeIntervalSince1970)
                case .duration:
                    let hour = self.dataSource[0][self.pickerView.selectedRow(inComponent: 0)].integerValue
//                    let min = self.dataSource[2][self.pickerView.selectedRow(inComponent: 2)].integerValue
//                    value = hour * 60 + min
                    value = hour
                }
                if let result = self.currenValues {
                    result(value)
                }
                self.dimiss()
            })
            .disposed(by: rx.disposeBag)
    }
    
    fileprivate func animation(isShow: Bool, view: UIView? = nil) {
        self.layoutIfNeeded()
        if isShow {
            guard let view = view else { return }
            view.addSubview(self)
            UIView.animate(withDuration: 0.3) {
                self.backgroundView.snp.updateConstraints { (make) in
                    make.bottom.equalToSuperview().offset(0)
                }
                self.layoutIfNeeded()
            }
            return
        }else {
            UIView.animate(withDuration: 0.3, animations: {
                self.backgroundView.snp.updateConstraints { (make) in
                    make.bottom.equalToSuperview().offset(252)
                }
                self.layoutIfNeeded()
            }) { _ in
                self.removeFromSuperview()
            }
        }
    }
    
    fileprivate func switchDataSource(type: PikcerType) {
        // 标题
        switch type {
        case .height:
            titleLabel.text = MultiLanguageKey.height.localized
        case .weight:
            titleLabel.text = MultiLanguageKey.weight.localized
        default:
            break
        }
        // 数据源
        switch type {
        case .step:
            dataSource = steps
        case .step1:
            dataSource = steps1
        case .height:
            dataSource = heights
        case .weight:
            dataSource = weights
        case .duration:
            dataSource = durations
        default: break
        }
        pickerView.reloadAllComponents()
    }
    
}

extension PickerView: UIPickerViewDelegate, UIPickerViewDataSource {
    
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return dataSource.count
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return dataSource[component].count
    }
    
    func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
        return kScaleHeight(50)
    }
    
    func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
        // 设置分割线的颜色
        for i in 0..<pickerView.subviews.count {
            let singleLine = pickerView.subviews[i]
            if singleLine.height <= 1 {
                singleLine.backgroundColor = kHexColor(0xEBEBEB)
            }
        }
        // 设置文字
        let label = UILabel().then {
            let width = component == 1 ? kScaleWidth(55 * 2 + 32) : kScaleWidth(80)
            $0.frame = CGRect(x: 0, y: 0, width: width, height: kScaleWidth(50))
            $0.font = SystemMediumFont(18)
            $0.text = dataSource[component][row]
            $0.textAlignment = component == 0 ? .right : component == 1 ? .center : .left
            $0.textColor = ThemeManager.commonTextColor
        }
        return label
    }

}