//
//  Block.swift
//  DLSDK
//
//  Created by osell on 2023/3/6.
//

import UIKit
import ObjectiveC.runtime

public typealias VoidAnyBlock = (Any) -> Void

class InnerBlockTarget: NSObject {
    
    var identifier: String = ""
    var block: VoidAnyBlock?
    var events: UIControl.Event?
    
    override init() {
        self.identifier = UUID().uuidString
        super.init()
    }
    
    @objc
    func invoke(_ sender: Any) {
        if let block = block {
            block(sender)
        }
    }
    
}

// MARK: - UIGestureRecognizer + Block
@objc extension UIGestureRecognizer {
    
    struct BlockKey {
        static var innerBlockTargets = "innerBlockTargets"
    }
    
    var innerBlockTargets: [InnerBlockTarget] {
        get {
            guard let targets = objc_getAssociatedObject(self, &BlockKey.innerBlockTargets) as? [InnerBlockTarget] else {
                return []
            }
            return targets
        }
        
        set {
            objc_setAssociatedObject(self, &BlockKey.innerBlockTargets, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
    }
    
    /// 增加Tap
    /// - Parameter block: 事件回调
    /// - Returns: UIGestureRecognizer
    @discardableResult
    public class func gestureRecognizer(with block: @escaping VoidAnyBlock) -> UIGestureRecognizer {
        let gestureRecognizer = UIGestureRecognizer()
        gestureRecognizer.addBlock(block)
        return gestureRecognizer
    }
    
    /// 增加Block
    @discardableResult
    public func addBlock(_ block: @escaping VoidAnyBlock) -> String {
        let target = InnerBlockTarget()
        target.block = block
        addTarget(target, action: #selector(InnerBlockTarget.invoke(_:)))
        var targets = innerBlockTargets
        targets.append(target)
        innerBlockTargets = targets
        return target.identifier
    }
    
    /// 删除Block
    public func removeBlock(identifier: String) {
        if identifier.isEmpty { return }
        var targets = innerBlockTargets
        guard let target = targets.first(where: { $0.identifier == identifier }) else { return }
        removeTarget(target, action: #selector(InnerBlockTarget.invoke(_:)))
        targets.removeObject(target)
        innerBlockTargets = targets
    }
    
    /// 删除全部
    public func removeAll() {
        innerBlockTargets.forEach {
            self.removeTarget($0, action: #selector(InnerBlockTarget.invoke(_:)))
        }
        innerBlockTargets = []
    }
}

// MARK: - UIView + Block
@objc extension UIView {
    
    struct BlockKey {
        static var addTapGestrueBlock = "addTapGestrueBlock"
    }
    
    /// UIView添加Tap点击事件
    /// - Parameters:
    ///   - taget: Any
    ///   - action: Selector
    public func addTapGestrue(with taget: Any, action: Selector?) {
        let tap = UITapGestureRecognizer(target: taget, action: action)
        isUserInteractionEnabled = true
        addGestureRecognizer(tap)
    }
    
    /// UIView添加Tap点击事件
    /// - Parameter block: 点击Block回调
    /// - Returns: indetifier
    @discardableResult
    public func addTapGestrue(block: @escaping VoidAnyBlock) -> String {
        let tap = UITapGestureRecognizer()
        let indetifier = tap.addBlock(block)
        objc_setAssociatedObject(tap, &BlockKey.addTapGestrueBlock, indetifier, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        isUserInteractionEnabled = true
        addGestureRecognizer(tap)
        return indetifier
    }
    
    /// 移除Tap事件
    /// - Parameter identifier: identifier
    public func removeTapGestrueBlock(with identifier: String) {
        if identifier.isEmpty { return }
        gestureRecognizers?.forEach {
            if $0.isKind(of: UITapGestureRecognizer.self),
               let tempidentifier = objc_getAssociatedObject($0, &BlockKey.addTapGestrueBlock) as? String,
               tempidentifier == identifier {
                $0.removeBlock(identifier: identifier)
                self.removeGestureRecognizer($0)
            }
        }
    }
}

// MARK: - UIControl + Block
@objc extension UIControl {
    
    struct BlockKey {
        static var innerBlockTargets = "innerBlockTargets"
    }
    
    var innerBlockTargets: [InnerBlockTarget] {
        get {
            guard let targets = objc_getAssociatedObject(self, &BlockKey.innerBlockTargets) as? [InnerBlockTarget] else {
                return []
            }
            return targets
        }
        
        set {
            objc_setAssociatedObject(self, &BlockKey.innerBlockTargets, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
    }
    
    /// 添加block的ControlEvents
    /// - Parameters:
    ///   - controlEvents: UIControl.Event
    ///   - block: (Any) -> Void
    /// - Returns: identifier
    @discardableResult
    public func addBlock(for controlEvents: UIControl.Event,
                         block: @escaping VoidAnyBlock) -> String {
        if let target = innerBlockTargets.first(where: { $0.events == controlEvents }) {
            innerBlockTargets.removeObject(target)
        }
        let target = InnerBlockTarget()
        target.block = block
        target.events = controlEvents
        addTarget(target, action: #selector(InnerBlockTarget.invoke(_:)), for: controlEvents)
        var targets = innerBlockTargets
        targets.append(target)
        innerBlockTargets = targets
        return target.identifier
    }
    
    
    /// 移除Block
    /// - Parameters:
    ///   - controlEvents: UIControl.Event
    ///   - identifier: identifier
    public func removeBlock(for controlEvents: UIControl.Event, identifier: String) {
        if identifier.isEmpty { return }
        removeAllBlock(for: controlEvents, identifier: identifier)
    }
    
    /// 移除identifier全部Block
    /// - Parameters:
    ///   - controlEvents: UIControl.Event
    ///   - identifier: identifier， 默认为空，会移除所有的block
    public func removeAllBlock(for controlEvents: UIControl.Event, identifier: String = "") {
        var targets = innerBlockTargets
        var removes = [InnerBlockTarget]()
        targets.forEach {
            if let events = $0.events,
               ((events.rawValue & controlEvents.rawValue) != 0),
               ($0.identifier == identifier || identifier.isEmpty) {
                let event = UIControl.Event(rawValue: events.rawValue & (~controlEvents.rawValue))
                if event.rawValue != 0 {
                    removeTarget($0, action: #selector(InnerBlockTarget.invoke(_:)), for: controlEvents)
                    $0.events = event
                    addTarget($0, action: #selector(InnerBlockTarget.invoke(_:)), for: event)
                } else {
                    removeTarget($0, action: #selector(InnerBlockTarget.invoke(_:)), for: controlEvents)
                    removes.append($0)
                }
            }
        }
        removes.forEach {
            targets.removeObject($0)
        }
        innerBlockTargets = targets
    }
    
    public func addTouchTarget(_ target: Any, action: Selector) {
        addTarget(target, action: action, for: .touchUpInside)
    }
    
    @discardableResult
    public func addTouchBlock(_ block: @escaping VoidAnyBlock) -> String {
        addBlock(for: .touchUpInside, block: block)
    }
    
    public func removeTouchBlock(with identifier: String) {
        removeBlock(for: .touchUpInside, identifier: identifier)
    }
}