import { UTSiOS } from "DCloudUniappRuntime";
import { UIActivityViewController, UIActivity, UIImage } from "UIKit";
import { URL, Data, FileManager, URLResourceKey } from "Foundation";
import { UTType } from "UniformTypeIdentifiers";

import { DispatchGroup, DispatchQueue } from "Dispatch"
import {
	ShareWithSystem,
	ShareWithSystemOptions,
	ShareWithSystemSuccess
} from "../interface.uts";
import { ShareWithSystemFailImpl } from '../unierror.uts';

export const shareWithSystem : ShareWithSystem = function (options : ShareWithSystemOptions) {

	ShareManager.options = options

	if (options.href == null
		&& options.imageUrl == null
		&& options.imagePaths == null
		&& options.summary == null
		&& options.videoPaths == null
		&& options.audioPaths == null
		&& options.filePaths == null) {
			
		ShareManager.failedAction(1310601, null)
		return
	}

	let items : Array<any> = []

	if (options.summary != null) {
		items.push(options.summary!)
	}

	const dispatchGroup = DispatchGroup()

	if (options.imageUrl != null) {
		dispatchGroup.enter()
		UTSiOS.loadImage(options.imageUrl!, (image ?: UIImage, data ?: Data) : void => {
			if (image != null && ShareManager.getValidPath(options.imageUrl!) != null) {
				items.push(ShareManager.getValidPath(options.imageUrl!)!)
				dispatchGroup.leave()
			} else {
				const errMsg = "Invalid imageUrl: " + options.imageUrl!
				ShareManager.failedAction(1310603, errMsg)
			}

		})
	}

	if (options.imagePaths != null && options.imagePaths!.count > 0) {
		let temp = "Invalid imagePaths: "
		let list : string[] = Array()
		let index = 0
		options.imagePaths!.forEach((value, key) => {
			dispatchGroup.enter()
			UTSiOS.loadImage(value, (image : UIImage | null, data : Data | null) : void => {
				index += 1
				if (image != null && ShareManager.getValidPath(value) != null) {
					items.push(ShareManager.getValidPath(value)!)
				} else {
					list.add(value)
					ShareManager.tempBreak = true
				}
				if (index == options.imagePaths!.count && ShareManager.tempBreak) {
					temp = temp + list.toString()
					ShareManager.failedAction(1310603, temp)
				}
				dispatchGroup.leave()
			})
		})
	}

	if (options.href != null) {
		if (ShareManager.isValidHref(options.href!)) {
			const url = URL(string = options.href!)
			items.push(url!)
		} else {
			const errMsg = "Invalid href: " + options.href!
			ShareManager.failedAction(1310604, errMsg)
			return
		}
	}

	if (options.videoPaths != null && options.videoPaths!.count > 0) {
		let temp = "Invalid videoPaths: "
		let list : string[] = Array()
		let tempBreak = false

		options.videoPaths!.forEach((value, key) => {
			if (ShareManager.isValidVideoFile(value) && ShareManager.getValidPath(value) != null) {
				items.push(ShareManager.getValidPath(value)!)
			} else {
				list.add(value)
				tempBreak = true
			}
		})
		if (tempBreak) {
			temp = temp + list.toString()
			ShareManager.failedAction(1310605, temp)
			return
		}
	}

	if (options.audioPaths != null && options.audioPaths!.count > 0) {
		let temp = "Invalid audioPaths: "
		let list : string[] = Array()
		let tempBreak = false

		options.audioPaths!.forEach((value, key) => {
			if (ShareManager.isValidAudioFile(value) && ShareManager.getValidPath(value) != null) {
				items.push(ShareManager.getValidPath(value)!)
			} else {
				list.add(value)
				tempBreak = true
			}
		})
		if (tempBreak) {
			temp = temp + list.toString()
			ShareManager.failedAction(1310607, temp)
			return
		}
	}

	if (options.filePaths != null && options.filePaths!.count > 0) {
		let temp = "Invalid filePaths: "
		let list : string[] = Array()
		let tempBreak = false
		options.filePaths!.forEach((value, key) => {
			if (ShareManager.isValidPath(value) && ShareManager.getValidPath(value) != null) {
				items.push(ShareManager.getValidPath(value)!)
			} else {
				list.add(value)
				tempBreak = true
			}
		})
		if (tempBreak) {
			temp = temp + list.toString()
			ShareManager.failedAction(1310606, temp)
			return
		}
	}

	dispatchGroup.notify(queue = DispatchQueue.main, execute = () : void => {
		if (ShareManager.tempBreak) {
			ShareManager.tempBreak = false
			return
		}

		const activityVC = UIActivityViewController(activityItems = items, applicationActivities = null)

		let completionWithItemsHandler : UIActivityViewController.CompletionWithItemsHandler = (activityType ?: UIActivity.ActivityType, completed : boolean, returnedItems ?: any[], activityError ?: NSError) : void => {
			if (activityError != null) {
				ShareManager.failedAction(1310602, activityError!.localizedDescription)
			} else if (completed == true) {
				ShareManager.successAction()
			} else {
				ShareManager.failedAction(1310600, null)
			}
		}
		activityVC.completionWithItemsHandler = completionWithItemsHandler
		
		const isPad = UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.pad
		if (isPad) {
			let popoverController = activityVC.popoverPresentationController
			if (popoverController != null) {
				let sourceView = UTSiOS.getCurrentViewController().view
				if (sourceView != null) {
					let sourceRect = CGRect(x = sourceView!.bounds.midX, y = sourceView!.bounds.midY, width = 0.0, height = 0.0)	
					popoverController!.sourceView = sourceView
					popoverController!.sourceRect = sourceRect
					popoverController!.permittedArrowDirections = UIPopoverArrowDirection.any
				}
			}
		} 
		
		if (UIApplication.shared.keyWindow?.rootViewController != null) {
			UIApplication.shared.keyWindow?.rootViewController?.present(activityVC, animated = true)
		} else {
			UTSiOS.getCurrentViewController().present(activityVC, animated = true)
		}
	})
}

class ShareManager {
	static options : ShareWithSystemOptions | null
	static tempBreak = false

	static failedAction(errCode : number, errMsg ?: string | null) {
		let err = new ShareWithSystemFailImpl(errCode, errMsg);
		this.options?.fail?.(err)
		this.options?.complete?.(err)
	}

	static successAction() {
		let success = new ShareWithSystemSuccess()
		this.options?.success?.(success)
		this.options?.complete?.(success)
	}

	static isValidHref(href ?: string) : boolean {
		if (href == null) {
			return false
		}
		const url = URL(string = href!)
		if (url == null || url?.scheme == null || url?.host == null) {
			return false
		}

		if (["http", "https"].contains(url?.scheme?.lowercased())) {
			return true
		}
		return false
	}

	static isValidPath(path : string) : boolean {
		let temp = path
		if (path.startsWith("file://")) {
			temp = path.substring(7)
		} else if (path.startsWith("/var/") == false) {
			temp = UTSiOS.getResourcePath(path);
		}
		const url = URL(fileURLWithPath = temp)
		if (FileManager.default.fileExists(atPath = url.path)) {
			return true
		}
		return false
	}

	static getValidPath(path : string) : URL | null {
		let temp = path
		if (path.startsWith("file://")) {
			temp = path.substring(7)
		} else if (path.startsWith("/var/") == false) {
			temp = UTSiOS.getResourcePath(path);
		}
		const url = URL(fileURLWithPath = temp)
		if (FileManager.default.fileExists(atPath = url.path)) {
			return url
		}
		return null
	}

	static isValidVideoFile(path : string) : boolean {
		if (ShareManager.isValidPath(path)) {
			const url = ShareManager.getValidPath(path)
			if (url == null) {
				return false
			}
			if (UTSiOS.available("iOS 14.0, *")) {
				try {
					const fileType = UTSiOS.try(url?.resourceValues(forKeys = [URLResourceKey.contentTypeKey]).contentType)

					if (fileType != null) {
						if (fileType!.conforms(to = UTType.movie) || fileType!.conforms(to = UTType.video)) {
							return true
						}
					}
				} catch (e) {
					console.error(e)
				}
			} else {
				const fileExtension = url?.pathExtension.lowercased()

				const mediaExtensions : Array<String> = [
					// Video formats
					"mp4", "mov", "avi", "mkv", "flv", "webm", "3gp", "3g2", "wmv", "mpg", "mpeg", "m4v", "f4v", "f4p", "f4a", "f4b",
					"ts", "mts", "m2ts", "vob", "rm", "rmvb", "asf", "swf", "divx", "xvid", "dv", "ogv", "ogm", "mxf", "roq", "nsv"
				]

				return mediaExtensions.contains(fileExtension ?? "")
			}
		}
		return false
	}

	static isValidAudioFile(path : string) : boolean {
		if (ShareManager.isValidPath(path)) {
			const url = ShareManager.getValidPath(path)
			if (url == null) {
				return false
			}
			if (UTSiOS.available("iOS 14.0, *")) {
				try {
					const fileType = UTSiOS.try(url?.resourceValues(forKeys = [URLResourceKey.contentTypeKey]).contentType)

					if (fileType != null) {
						if (fileType!.conforms(to = UTType.movie) || fileType!.conforms(to = UTType.audio)) {
							return true
						}
					}
				} catch (e) {
					console.error(e)
				}
			} else {
				const fileExtension = url?.pathExtension.lowercased()

				const mediaExtensions : Array<String> = [
					// Audio formats
					"mp3", "aac", "wav", "flac", "alac", "wma", "m4a", "ogg", "opus", "amr", "aiff", "aif", "aifc", "pcm", "au",
					"ac3", "eac3", "caf", "dts", "mka"
				]

				return mediaExtensions.contains(fileExtension ?? "")
			}
		}
		return false
	}
}