class Finder{
    static AppId = "Finder"

    /**
    * @param {string[]} args
    */
    async NewWindow(args, runContext){
        let newFinder = new FinderWindow()
        await newFinder.Init(args, runContext)
    }
    
    /**
     * @param {string} path
     * @returns {boolean}
    */
    static async RenderProperites(path){
        if (path == null || path ==""){
            return
        }
        const params = new URLSearchParams({
            path: path
        })
        const response = await fetch(`/app/${Finder.AppId}/renderProps?` + params)
        if (response.status != 200){
            WebDesktopEnvironment.Alert("Error in properties render") //TODO
            return false
        }
        const html = await response.text()
        let newWindow = WebDesktopEnvironment.CreateNewWindow(Finder.AppId, 350, 500 )    
        newWindow.innerHTML = html
        newWindow.querySelector("#closeWindowButton").addEventListener('click', function (params) {
            WebDesktopEnvironment.CloseWindow(newWindow)
        })
    }
}


class FinderWindow{
    curPath = ""
    fileView = undefined
    windowElem = undefined
    
    async Init(args, appContext){
        if (args[1] == "--desktop"){
            let desktopNode = document.body.querySelector(`#${args[2]}`)
            if (desktopNode == null){
                WebDesktopEnvironment.Alert("Desktop node not found")
                return
            }

            const params = new URLSearchParams({
                path: args[0]
            })
            const response = await fetch(`/app/${Finder.AppId}/renderDesktop?` + params,
            {
                method: "POST",
                body: JSON.stringify(appContext)
            })
            if (response.status != 200){
                console.log(response.status)
                WebDesktopEnvironment.Alert("Error in render desktop") //TODO
                return
            }
            const html = await response.text()
            desktopNode.innerHTML = html
            
            this.fileView = new FileView(
                desktopNode.querySelector(".FileTileView"), (event) =>{this.Click(event)},
                (event) => { this.RightClick(event) },
                (event, draggedElem) => { this.DropEvent(event, draggedElem)},
                () => { this.ReRenderDir() }
                )
                this.RenderDir(args[0])
                return
        }
        const params = new URLSearchParams({isMobile: WebDesktopEnvironment.isMobile})
        const response = await fetch(`/app/${Finder.AppId}/render?` + params,  
        {
            method: "POST",
            body: JSON.stringify(appContext)
        })
        if (response.status != 200){
            const error = await response.json()
            WebDesktopEnvironment.Alert(error.message)
            return
        }
        const html = await response.text()
        
        let newWindow = WebDesktopEnvironment.CreateNewWindow(Finder.AppId, 500, 350 )    
        newWindow.innerHTML = html
        
        this.fileView = new FileView(
            newWindow.querySelector(".FileTileView"),
            (event) => { this.Click(event) },
            (event) => { this.RightClick(event) },
            (event, draggedElem) => { this.DropEvent(event, draggedElem)},
            () => { this.ReRenderDir() }
            )
            
            newWindow.querySelector("#closeWindowButton").addEventListener('click', function (params) {
                
                WebDesktopEnvironment.CloseWindow(newWindow)
                
            })
            
            newWindow.querySelector("#RootButton").addEventListener('click', () =>{
                this.RenderDir('/')
            })
            
            newWindow.querySelector("#HomeButton").addEventListener('click', () =>{
                this.RenderDir('/home/user')
            })
            
            let scrollBar = new WdeScrollBar(newWindow.querySelector(".ScrollbarPlace"), newWindow.querySelector(".FileTileView"))
            
            this.windowElem = newWindow
            this.RenderDir(args[0])
        }
    
    /**
    * @param {string} path
    */
    RenderDir(path){
        this.curPath = path
        this.fileView.OpenFolder(path)
    }
    
    ReRenderDir(){
        this.RenderDir(this.curPath)
    }
    
    /**
     * @param {DragEvent} event
     * @param {HTMLElement} draggedElem
    */
    async DropEvent(event){
        // console.log(event.dataTransfer.getData("dropType"))
        if (event.dataTransfer.getData("dropType") == "move"){
            const sourcePath= event.dataTransfer.getData("filePath")
            const targetPath = this.curPath + "/" + event.dataTransfer.getData("fileName")
            const res = await WebFS.MoveFile(sourcePath, targetPath)
            if (res){
                this.ReRenderDir()
            } else {
                WebDesktopEnvironment.Alert("UWAGA TODO MOVE FILE ERROR") //TODO
            }
        } else {
            console.log(event, this.curPath)
            let files = event.dataTransfer.files
            for (let i = 0; i < files.length; i++) {
                const file = files[i];
                console.log("file:" + file.name)
                
                const res = await WebFS.UploadFile(file, this.curPath)
                if (res){
                    this.ReRenderDir()
                }
            }
            return
            const params = new URLSearchParams({
                parentPath: this.curPath,
            })
            const response = await fetch('/fs/upload/?' + params, 
            {
                method: "POST",  //TODO Change to PUT?
                body: formData
            })
            if (response.status != 200){
                WebDesktopEnvironment.Alert("ERROR IN UPLOADING FILE")//TODO
            } else {
                this.ReRenderDir()
            }
               
        }
    }

    /**
    * @param {MouseEvent} event
    */
    Click(event){
        this.OpenFile(this.curPath, event.target.getAttribute("name"), event.target.getAttribute("filetype"))
    }

    /**
    * @param {string} filePath
    */
    async OpenFile(parentPath, fileName, fileType){
        // console.log(parentPath, fileName, fileType)
        // const splittedPath = filePath.split("/")
        // const fileName = splittedPath[splittedPath.length - 1]
        const fileExtension = fileName.split(".")[fileName.split(".").length - 1] //FIXME

        switch (true) {
            case fileType == "objectlink":
                WebDesktopEnvironment.Alert("Links not supported yet")
                break
            case fileType == "pathlink":
                let res = await WebFS.ReadPathLink(`${parentPath}/${fileName}`)
                console.log(res)
                this.OpenFile(res.parentPath, res.name, res.filetype)
                break
            case fileExtension == "app":
                WebDesktopEnvironment.Open(`${parentPath}/${fileName}`, [])
                break
            case fileExtension == "blog":
                WebDesktopEnvironment.Open(`/Applications/BlogViewer.app`, [`${parentPath}/${fileName}`])
                break
            case fileType == "directory":
                WebDesktopEnvironment.Open(`/Applications/Finder.app`, [`${parentPath}/${fileName}`])
                break
            case fileExtension == "blog":
                WebDesktopEnvironment.Open("/Applications/BlogViewer.app", [`${parentPath}/${fileName}`])
                break
            case fileExtension == "jpeg" | fileExtension == "png":
                WebDesktopEnvironment.Open("img-viewer", [`${parentPath}/${fileName}`])
                break;
            default:
                WebDesktopEnvironment.Alert("Unsupported file type")
                break;
        }
    }

    /**
    * @param {MouseEvent} event
    */
    RightClick(event){
        this.CreateContextMenu(event.target, [event.clientY, event.clientX])
    }

    /**
    * @param {HTMLElement} target
    * @param {string[]} pos
    */
    async CreateContextMenu(target, pos){
        let context = ""
        const fileName = target.getAttribute("name") //TODO check for null
        const fileType = target.getAttribute("fileType")
        if (target.classList.contains("FileTileView"))
        {
            context = "FileTileView"
        } else {
            context = fileType
        }
        let path = ""
        if (fileName === null){
            path = this.curPath
        } else {
            path = `${this.curPath}/${fileName}`
        }
        const params = new URLSearchParams({context: context, path: path})
        const response = await fetch(`/app/${Finder.AppId}/contextMenu?` + params) 
        if (response.status != 200){
            WebDesktopEnvironment.Alert("ERROR in Context menu TODO"); //TODO
            return
        }
        const html = await response.text()
        let overlay = document.createElement("div") //TODO Move to WDE.CreateOverlay()
        overlay.setAttribute('id', 'finder-context-menu-overlay')
        overlay.style.position = 'absolute'
        overlay.style.width = "100%"
        overlay.style.height = "100%"

        let menu = document.createElement("div")
        menu.setAttribute('class', 'ContextMenu  WindowFrameShadow')
        menu.style.position = 'absolute';
        menu.style.top = pos[0] + "px";
        menu.style.left = pos[1] + "px";
        
        menu.innerHTML = html
        // menu.children[0].firstElementChild.remove()
        menu.children[0].lastElementChild.remove() //FIXME Can't ommit rendering of horLine in end of menu on backend
        
        overlay.appendChild(menu)
        document.body.appendChild(overlay)

        overlay.addEventListener('click', async (event) => {
            if (event.target.classList.contains("Row")){ //TODO add uuid id to rows to more accurate checks??
                let res = false
                switch (event.target.children[0].getAttribute("action")) {
                    case "createPathLink":
                        res = await WebFS.CreatePathLink(`${this.curPath}/${fileName}`, `${this.curPath}/Link to ${fileName}` )
                        if (res){
                            this.ReRenderDir()
                        }
                        break
                    case "createDir":
                        res = await WebFS.CreateDirectory(`${this.curPath}`)
                        console.log(res)
                        if (res){
                            this.ReRenderDir()
                        }
                        break
                    case "deleteFile":
                        res = await WebFS.DeleteFile(`${this.curPath}/${fileName}`)
                        console.log(res)
                        if (res){
                            this.ReRenderDir()
                        }
                        break
                    case "getInfo":
                        Finder.RenderProperites(path)
                        break
                    case "openAsDir":
                        WebDesktopEnvironment.Open(`/Applications/${Finder.AppId}.app`,[`${this.curPath}/${fileName}`])
                        break
                    default:
                        break;
                } 
            }
            overlay.remove()
        })
        overlay.addEventListener('contextmenu', (event) => {
            event.preventDefault();
            overlay.remove()
        })
    }
}