/*
 * Copyright (c) 2010-2020 Belledonne Communications SARL.
 *
 * This file is part of linphone-iphone
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import Foundation
import linphonesw


@objc class CallStatsView: UIView{
	
	// Layout constants
	let side_margins = 10.0
	let margin_top = 25
	let corner_radius = 20.0
	let audio_video_margin = 13
	
	init(superView:UIView, callData:CallData, marginTop:CGFloat, above:UIView, onDismissAction : @escaping ()->Void) {
		super.init(frame:.zero)
		backgroundColor = VoipTheme.voip_translucent_popup_background
		layer.cornerRadius = corner_radius
		clipsToBounds = true
		superView.addSubview(self)
		matchParentSideBorders(insetedByDx: side_margins).alignParentTop(withMargin: marginTop).alignAbove(view: above,withMargin: SharedLayoutConstants.buttons_bottom_margin).done()
		accessibilityIdentifier = "call_stats_view"
		accessibilityViewIsModal = true
		
		callData.callState.observe { state in
			if (state == Call.State.End) {
				onDismissAction()
			}
		}
        
		// Hide call stats button
		let hide = CallControlButton(buttonTheme: VoipTheme.voip_cancel_light, onClickAction: {
			onDismissAction()
		})
		addSubview(hide)
		hide.alignParentRight(withMargin: side_margins).alignParentTop(withMargin: side_margins).done()
        hide.accessibilityIdentifier = "call_stats_view_hide"
        hide.accessibilityLabel = "Hide"

		// Audio Stats Title
		let model = CallStatisticsData(call: callData.call)
		let encryptionTitle = StyledLabel(VoipTheme.call_stats_font_title,NSLocalizedString("Encryption", comment: ""))
		addSubview(encryptionTitle)
		encryptionTitle.matchParentSideBorders().alignParentTop(withMargin: margin_top).done()
		
		let encryptionStats = StyledLabel(VoipTheme.call_stats_font)
		
		encryptionStats.numberOfLines = 0
		addSubview(encryptionStats)
		encryptionStats.matchParentSideBorders().alignUnder(view: encryptionTitle).done()
		
		
		let audioTitle = StyledLabel(VoipTheme.call_stats_font_title,NSLocalizedString("Audio", comment: ""))
		addSubview(audioTitle)
		audioTitle.alignUnder(view: encryptionStats, withMargin:audio_video_margin).matchParentSideBorders().done()

		let audioStats = StyledLabel(VoipTheme.call_stats_font)
		audioStats.numberOfLines = 0
		addSubview(audioStats)
		audioStats.matchParentSideBorders().alignUnder(view: audioTitle).done()
		
        // Video Stats Title
		let videoTitle = StyledLabel(VoipTheme.call_stats_font_title,NSLocalizedString("Video", comment: ""))
		addSubview(videoTitle)
		videoTitle.alignUnder(view: audioStats, withMargin:audio_video_margin).matchParentSideBorders().done()
		
        // Video Stats Corp
		let videoStats = StyledLabel(VoipTheme.call_stats_font)
		videoStats.numberOfLines = 0
		addSubview(videoStats)
		videoStats.matchParentSideBorders().alignUnder(view: videoTitle).done()
		
		model.isVideoEnabled.readCurrentAndObserve { (video) in
			videoTitle.isHidden  = video != true
			videoStats.isHidden  = video != true
		}
		
		model.statsUpdated.readCurrentAndObserve { (updated) in
			var stats = ""
			model.audioStats.forEach {
				stats += "\n\($0.getTypeTitle())\($0.value.value ?? "n/a")"
			}
			audioStats.text = stats
			stats = ""
			model.videoStats.forEach {
				stats += "\n\($0.getTypeTitle())\($0.value.value ?? "n/a")"
			}
			videoStats.text = stats
			
			if let mediaEncryption = model.call.currentParams?.mediaEncryption {
				stats = ""
				switch (mediaEncryption) {
				case MediaEncryption.None: stats += "\nNone"
				case MediaEncryption.SRTP: stats += "\nSRTP"
				case MediaEncryption.DTLS: stats += "\nDTLS"
				case MediaEncryption.ZRTP:
					if let callstats = model.call.audioStats {
						stats += callstats.isZrtpKeyAgreementAlgoPostQuantum ? "\nPost Quantum ZRTP" : "\nZRTP"
						stats += "\nCipher algorithm: \(callstats.zrtpCipherAlgo)"
						stats += "\nKey agreement algorithm: \(callstats.zrtpKeyAgreementAlgo)"
						stats += "\nHash algorithm: \(callstats.zrtpHashAlgo)"
						stats += "\nAuth tag algorithm: \(callstats.zrtpAuthTagAlgo)"
						stats += "\nSas algorithm: \(callstats.zrtpSasAlgo)"
					}
				}
				encryptionStats.text = stats
			}
		}
				
	}
	
	required init?(coder: NSCoder) {
		super.init(coder: coder)
	}
	
}