import Foundation
import AsyncDisplayKit
import Display
import ComponentFlow
import SwiftSignalKit
import TelegramCore
import AccountContext
import TelegramPresentationData
import UIKit
import WebPBinding
import RLottieBinding
import GZip
import AnimationCache
import EmojiTextAttachmentView

public let sharedReactionStaticImage = Queue(name: "SharedReactionStaticImage", qos: .default)

public func reactionStaticImage(context: AccountContext, animation: TelegramMediaFile, pixelSize: CGSize, queue: Queue) -> Signal<EngineMediaResource.ResourceData, NoError> {
    return context.engine.resources.custom(id: "\(animation.resource.id.stringRepresentation):reaction-static-\(pixelSize.width)x\(pixelSize.height)-v10", fetch: EngineMediaResource.Fetch {
        return Signal { subscriber in
            let fetchDisposable = fetchedMediaResource(mediaBox: context.account.postbox.mediaBox, userLocation: .other, userContentType: .image, reference: MediaResourceReference.standalone(resource: animation.resource)).start()
            
            var customColor: UIColor?
            if animation.isCustomTemplateEmoji {
                customColor = nil
            }
            
            let fetchFrame = animationCacheFetchFile(context: context, userLocation: .other, userContentType: .sticker, resource: MediaResourceReference.standalone(resource: animation.resource), type: AnimationCacheAnimationType(file: animation), keyframeOnly: true, customColor: customColor)
            
            class AnimationCacheItemWriterImpl: AnimationCacheItemWriter {
                let queue: Queue
                private let frameReceived: (UIImage) -> Void
                
                init(queue: Queue, frameReceived: @escaping (UIImage) -> Void) {
                    self.queue = queue
                    self.frameReceived = frameReceived
                }
                
                var isCancelled: Bool {
                    return false
                }
                
                func add(with drawingBlock: (AnimationCacheItemDrawingSurface) -> Double?, proposedWidth: Int, proposedHeight: Int, insertKeyframe: Bool) {
                    if let renderContext = DrawingContext(size: CGSize(width: proposedWidth, height: proposedHeight), scale: 1.0, clear: true) {
                        let _ = drawingBlock(AnimationCacheItemDrawingSurface(
                            argb: renderContext.bytes.assumingMemoryBound(to: UInt8.self),
                            width: Int(renderContext.scaledSize.width),
                            height: Int(renderContext.scaledSize.height),
                            bytesPerRow: renderContext.bytesPerRow,
                            length: renderContext.length
                        ))
                        if let image = renderContext.generateImage() {
                            self.frameReceived(image)
                        }
                    }
                }
                
                func finish() {
                }
            }
            let innerWriter = AnimationCacheItemWriterImpl(queue: queue, frameReceived: { image in
                guard let pngData = image.pngData() else {
                    return
                }
                
                let tempFile = EngineTempBox.shared.tempFile(fileName: "image.png")
                guard let _ = try? pngData.write(to: URL(fileURLWithPath: tempFile.path)) else {
                    return
                }
                
                subscriber.putNext(.moveTempFile(file: tempFile))
                subscriber.putCompletion()
            })
            
            let dataDisposable = fetchFrame(AnimationCacheFetchOptions(
                size: pixelSize,
                writer: innerWriter,
                firstFrameOnly: true
            ))
            
            /*let dataDisposable = context.account.postbox.mediaBox.resourceData(animation.resource).start(next: { data in
                if !data.complete {
                    return
                }
                
               
                
                guard let data = try? Data(contentsOf: URL(fileURLWithPath: data.path)) else {
                    return
                }
                guard let unpackedData = TGGUnzipData(data, 5 * 1024 * 1024) else {
                    return
                }
                guard let instance = LottieInstance(data: unpackedData, fitzModifier: .none, colorReplacements: nil, cacheKey: "") else {
                    return
                }
                
                

                instance.renderFrame(with: Int32(instance.frameCount - 1), into: renderContext.bytes.assumingMemoryBound(to: UInt8.self), width: Int32(renderContext.size.width * renderContext.scale), height: Int32(renderContext.size.height * renderContext.scale), bytesPerRow: Int32(renderContext.bytesPerRow))
                
                
            })*/
            
            return ActionDisposable {
                fetchDisposable.dispose()
                dataDisposable.dispose()
            }
        }
    })
}

public final class ReactionImageNode: ASDisplayNode {
    private var disposable: Disposable?
    private let size: CGSize
    private let isAnimation: Bool
    
    private let iconNode: ASImageNode
    
    public init(context: AccountContext, availableReactions: AvailableReactions?, reaction: MessageReaction.Reaction, displayPixelSize: CGSize) {
        self.iconNode = ASImageNode()
        
        var file: TelegramMediaFile?
        var animationFile: TelegramMediaFile?
        if let availableReactions = availableReactions {
            for availableReaction in availableReactions.reactions {
                if availableReaction.value == reaction {
                    file = availableReaction.staticIcon._parse()
                    animationFile = availableReaction.centerAnimation?._parse()
                    break
                }
            }
        }
        if let animationFile = animationFile {
            self.size = animationFile.dimensions?.cgSize ?? displayPixelSize
            var displaySize = self.size.aspectFitted(displayPixelSize)
            displaySize.width = floor(displaySize.width * 2.0)
            displaySize.height = floor(displaySize.height * 2.0)
            self.isAnimation = true
            
            super.init()
            
            self.disposable = (reactionStaticImage(context: context, animation: animationFile, pixelSize: CGSize(width: displaySize.width * UIScreenScale, height: displaySize.height * UIScreenScale), queue: sharedReactionStaticImage)
            |> deliverOnMainQueue).start(next: { [weak self] data in
                guard let strongSelf = self else {
                    return
                }
                
                if data.isComplete, let dataValue = try? Data(contentsOf: URL(fileURLWithPath: data.path)) {
                    if let image = UIImage(data: dataValue) {
                        strongSelf.iconNode.image = image
                    }
                }
            }).strict()
        } else if let file = file {
            self.size = file.dimensions?.cgSize ?? displayPixelSize
            self.isAnimation = false
            
            super.init()
            
            self.disposable = (context.account.postbox.mediaBox.resourceData(file.resource)
            |> deliverOnMainQueue).start(next: { [weak self] data in
                guard let strongSelf = self else {
                    return
                }
                
                if data.complete, let dataValue = try? Data(contentsOf: URL(fileURLWithPath: data.path)) {
                    if let image = WebP.convert(fromWebP: dataValue) {
                        strongSelf.iconNode.image = image
                    }
                }
            }).strict()
        } else {
            self.size = displayPixelSize
            self.isAnimation = false
            super.init()
        }
        
        self.addSubnode(self.iconNode)
    }
    
    deinit {
        self.disposable?.dispose()
    }
    
    public func update(size: CGSize) {
        var imageSize = self.size.aspectFitted(size)
        if self.isAnimation {
            imageSize.width *= 2.0
            imageSize.height *= 2.0
        }
        self.iconNode.frame = CGRect(origin: CGPoint(x: floor((size.width - imageSize.width) / 2.0), y: floor((size.height - imageSize.height) / 2.0)), size: imageSize)
    }
}