//
//  KMConvertSettingView.swift
//  PDF Master
//
//  Created by tangchao on 2023/5/9.
//

let kKMConvertLanugageSelectedIndex: String = "KMConvertLanugageSelectedIndex"

typealias KMConvertSettingViewPageRangeDidChangeCallback = (_ pageRange: KMPageRange) -> Void
typealias KMConvertSettingViewPageRangeDidInputFinishCallback = (_ pageRangeString: String) -> ()

// 转档 设置视图 基类
class KMConvertSettingView: KMConvertBaseView {
    private var _currentLanguage: String?
    var currentLanguage: String? {
        get {
            return self._currentLanguage
        }
        set {
            self._currentLanguage = newValue
            
            if let indexString = UserDefaults.standard.string(forKey: kKMConvertLanugageSelectedIndex), let index = Int(indexString) {
                self.ocrLanuguageIndex = index
                return
            }

            if let result = newValue?.hasPrefix("zh-Hans"), result {
                ocrLanuguageIndex = 0
            } else if let result = newValue?.hasPrefix("en"), result {
                ocrLanuguageIndex = 2
            } else if let result = newValue?.hasPrefix("zh-Hant"), result {
                ocrLanuguageIndex = 1
            } else if  let result = newValue?.hasPrefix("fr"), result {
                ocrLanuguageIndex = 3
            } else if  let result = newValue?.hasPrefix("de"), result {
                ocrLanuguageIndex = 4
            } else if  let result = newValue?.hasPrefix("ht"), result { ///  海地克里奥尔语 Haitian
                ocrLanuguageIndex = 5
            } else if  let result = newValue?.hasPrefix("ja"), result {
                ocrLanuguageIndex = 6
            } else if  let result = newValue?.hasPrefix("ko"), result {
                ocrLanuguageIndex = 7
            } else if  let result = newValue?.hasPrefix("la"), result { ///  拉丁语 Latin
                ocrLanuguageIndex = 8
            } else {
                ocrLanuguageIndex = 2
            }
        }
    }
    
    var ocrLanuguageIndex: Int = 3
    
    var pageRangeSelectedIndex: Int = 0
    var pageRangeDidChange: KMConvertSettingViewPageRangeDidChangeCallback?
    var pageRangeDidInputFinishCallback: KMConvertSettingViewPageRangeDidInputFinishCallback?
    var lanugageDidSelected: KMValueDidChangeBlock?
    
    private var _ocrItemView: KMConvertOCRSettingItemView?
    var ocrItemView: KMConvertOCRSettingItemView? {
        get {
            return self._ocrItemView
        }
        set {
            if (self._ocrItemView != newValue) {
                self._ocrItemView = newValue
                
                newValue?.lanugageDidSelected = { [unowned self] value, change in
                    guard let callback = self.lanugageDidSelected else {
                        return
                    }
                    
                    callback(value, change)
                }
            }
        }
    }
    private var _pageRangeItemView: KMConvertPageRangeSettingItemView?
    var pageRangeItemView: KMConvertPageRangeSettingItemView? {
        get {
            return self._pageRangeItemView
        }
        set {
            if (self._pageRangeItemView != newValue) {
                self._pageRangeItemView = newValue
                newValue?.isTextDidEndCallback = true
                newValue?.itemClick = { [unowned self] index, _ in
                    self.pageRangeSelectedIndex = index
                    
                    guard let callback = self.pageRangeDidChange else {
                        return
                    }
                    
                    callback(KMPageRange(rawValue: index)!)
                }
                
                newValue?.textDidEndEditingCallback = { [unowned self] textString in
                    let pageRange = KMPageRange(rawValue: self.pageRangeSelectedIndex)
                    if (pageRange != .custom) {
                        return
                    }
                    
                    guard let callback = self.pageRangeDidInputFinishCallback else {
                        return
                    }
                    
                    callback(textString)
                }
            }
        }
    }
    
    var pageCount = 0 {
        didSet {
            self.pageRangeItemView?.pageCount = self.pageCount
        }
    }
    
    var ocrEnabled: Bool {
        get {
            guard let state = self.ocrItemView?.checkVC?.state else {
                return false
            }
            return state == .Checked
         }
    }
    
    func getPageRangeString() -> String {
        if let view = self.pageRangeItemView {
            return view.pageRangeValue
        }
        return ""
    }
}