//
//  IMPTrackingFacade.swift
//  Cordova Tracking Transparency
//
//  Created by Felix Nievelstein on 10.05.21.
//

import Foundation

@objc (ImpacTracking) class IMPTrackingFacade: CDVPlugin {
    
    private var onRequestCallbackId: String?
    
    @objc(canRequestTracking:) func canRequestTracking(command: CDVInvokedUrlCommand) {
        if #available(iOS 14, *) {
            let result = CDVPluginResult(status: CDVCommandStatus_OK, messageAs: IMPTrackingManager.shared.canRequestTracking)
            self.commandDelegate.send(result, callbackId: command.callbackId)
        } else {
            let result = CDVPluginResult(status: CDVCommandStatus_OK, messageAs: false)
            self.commandDelegate.send(result, callbackId: command.callbackId)
        }
    }
    
    @objc(trackingAvailable:) func trackingAvailable(command: CDVInvokedUrlCommand) {
        if #available(iOS 14, *) {
            let result = CDVPluginResult(status: CDVCommandStatus_OK, messageAs: IMPTrackingManager.shared.trackingAvailable)
            self.commandDelegate.send(result, callbackId: command.callbackId)
        } else {
            let result = CDVPluginResult(status: CDVCommandStatus_OK, messageAs: true)
            self.commandDelegate.send(result, callbackId: command.callbackId)
        }
    }
     
    @objc(requestTracking:) func requestTracking(command: CDVInvokedUrlCommand) {
        if #available(iOS 14, *) {
            if onRequestCallbackId == nil {
                onRequestCallbackId = command.callbackId
                if command.arguments.count == 1, let infoJson = command.arguments[0] as? String  {
                    do {
                        let decoder = JSONDecoder()
                        if let data = infoJson.data(using: String.Encoding.utf8) {
                            let info = try decoder.decode(TrackingRequestInfo.self, from: data)                            
                            IMPTrackingManager.shared.requestTracking(completion: requestCompletion, info: info)
                        } else {
                            IMPTrackingManager.shared.requestTracking(completion: requestCompletion)
                        }
                    } catch {
                        print("cordova-plugin-tracking-transparency: \(error)")
                        let result = CDVPluginResult(status: CDVCommandStatus_ERROR, messageAs: error.localizedDescription)
                        self.commandDelegate.send(result, callbackId: command.callbackId)
                    }
                } else {
                    IMPTrackingManager.shared.requestTracking(completion: requestCompletion)
                }
            } else {
                let result = CDVPluginResult(status: CDVCommandStatus_ERROR, messageAs: "Request already Running")
                self.commandDelegate.send(result, callbackId: command.callbackId)
            }
        } else {
            let result = CDVPluginResult(status: CDVCommandStatus_ERROR, messageAs: "App Tracking Transparency not available")
            self.commandDelegate.send(result, callbackId: command.callbackId)
        }
    }
    
    private func requestCompletion(success: Bool) {
        if let callbackId = onRequestCallbackId {
            let result = CDVPluginResult(status: CDVCommandStatus_OK, messageAs: success)
            self.commandDelegate.send(result, callbackId: callbackId)
            onRequestCallbackId = nil
        }
    }
}