/*
 * Copyright (c) 2010-2023 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 SwiftUI
import WebKit

struct ChatBubbleView: View {
	
	@ObservedObject var conversationViewModel: ConversationViewModel
	
	let message: Message
	
	let geometryProxy: GeometryProxy
	
	var body: some View {
		VStack {
			HStack {
				if message.isOutgoing {
					Spacer()
				}
				
				VStack(alignment: message.isOutgoing ? .trailing : .leading) {
					if !message.attachments.isEmpty {
						messageAttachments()
					}
					
					if !message.text.isEmpty {
						Text(message.text)
							   .foregroundStyle(Color.grayMain2c700)
							   .default_text_style(styleSize: 16)
					}
				}
				.padding(.all, 15)
				.background(message.isOutgoing ? Color.orangeMain100 : Color.grayMain2c100)
				.clipShape(RoundedRectangle(cornerRadius: 16))
				
				if !message.isOutgoing {
					Spacer()
				}
			}
			.padding(.leading, message.isOutgoing ? 40 : 0)
			.padding(.trailing, !message.isOutgoing ? 40 : 0)
		}
	}
	
	@ViewBuilder
	func messageAttachments() -> some View {
		if message.attachments.count == 1 {
			if message.attachments.first!.type == .image || message.attachments.first!.type == .gif {
				let result = imageDimensions(url: message.attachments.first!.full.absoluteString)
				ZStack {
					Rectangle()
						.fill(Color(.white))
						.aspectRatio(result.0/result.1, contentMode: .fit)
						.if(result.0 < geometryProxy.size.width - 110) { view in
							view.frame(maxWidth: result.0)
						}
						.if(result.1 < geometryProxy.size.height/2) { view in
							view.frame(maxHeight: result.1)
						}
						.if(result.0 >= result.1 && result.0 >= geometryProxy.size.width - 110 && result.1 >= geometryProxy.size.height/2.5) { view in
							view.frame(
								maxWidth: geometryProxy.size.width - 110,
								maxHeight: result.1 * ((geometryProxy.size.width - 110) / result.0)
							)
						}
						.if(result.0 < result.1 && result.1 >= geometryProxy.size.height/2.5) { view in
							view.frame(
								maxWidth: result.0 * ((geometryProxy.size.height/2.5) / result.1),
								maxHeight: geometryProxy.size.height/2.5
							)
						}
					
					if message.attachments.first!.type == .image {
						AsyncImage(url: message.attachments.first!.full) { image in
							image
								.resizable()
								.interpolation(.medium)
								.aspectRatio(contentMode: .fill)
						} placeholder: {
							ProgressView()
						}
						.layoutPriority(-1)
					} else {
						GifImageView(message.attachments.first!.full)
							.layoutPriority(-1)
							.clipShape(RoundedRectangle(cornerRadius: 4))
					}
				}
				.clipShape(RoundedRectangle(cornerRadius: 4))
				.clipped()
			}
		}
	}
	
	func imageDimensions(url: String) -> (CGFloat, CGFloat) {
		if let imageSource = CGImageSourceCreateWithURL(URL(string: url)! as CFURL, nil) {
			if let imageProperties = CGImageSourceCopyPropertiesAtIndex(imageSource, 0, nil) as Dictionary? {
				let pixelWidth = imageProperties[kCGImagePropertyPixelWidth] as? CGFloat
				let pixelHeight = imageProperties[kCGImagePropertyPixelHeight] as? CGFloat
				return (pixelWidth ?? 0, pixelHeight ?? 0)
			}
		}
		return (0, 0)
	}
}

enum URLType {
	case name(String) // local file name of gif
	case url(URL) // remote url
	
	var url: URL? {
		switch self {
		case .name(let name):
			return Bundle.main.url(forResource: name, withExtension: "gif")
		case .url(let remoteURL):
			return remoteURL
		}
	}
}

struct GifImageView: UIViewRepresentable {
	private let name: URL
	init(_ name: URL) {
		self.name = name
	}
	
	func makeUIView(context: Context) -> WKWebView {
		let webview = WKWebView()
		let url = name
		let data = try? Data(contentsOf: url)
		if data != nil {
			webview.load(data!, mimeType: "image/gif", characterEncodingName: "UTF-8", baseURL: url.deletingLastPathComponent())
			webview.scrollView.isScrollEnabled = false
		}
		return webview
	}
	
	func updateUIView(_ uiView: WKWebView, context: Context) {
		uiView.reload()
	}
}

/*
 #Preview {
 ChatBubbleView(conversationViewModel: ConversationViewModel(), index: 0)
 }
 */