//TODO Scroll to mobile desktop: https://css-tricks.com/scroll-fix-content/

document.addEventListener('DOMContentLoaded', function() {
    // console.log(window.screen.width)
    wde = new WebDesktopEnvironment()
    if (!WebDesktopEnvironment.isMobile){
        // WebDesktopEnvironment.Open("finder", ["/home/user"])

        // WebDesktopEnvironment.Open("blog-viewer", ["/home/user/blog1.blog"])
        // WebDesktopEnvironment.Open("personal-properties", ["/home/user/aboutme.props"])
    } else {
        // WebDesktopEnvironment.Open("blog-viewer", ["/home/user/blog/test-1.blog"])
    }
    
    
    // WebDesktopEnvironment.Open("personal-properties")
}, false);

class WebDesktopEnvironment{
    static Applications = {};
    static isMobile = false
    static decorat
    static webFs
    constructor(){
        // WebDesktopEnvironment.isMobile = WebDesktopEnvironment.CheckMobile()
        document.body.style.setProperty('--zoom', 1)
        WebDesktopEnvironment.wc = new WindowsCompositor()
        WebDesktopEnvironment.webFs = new WebFS()
        this.loadWDE()
    }

    async loadWDE(){
        // await WebDesktopEnvironment.load2('/Applications/Finder.app', [ "desktop", document.querySelector('#desktop-layer')])
        WebDesktopEnvironment.Open('/Applications/Finder.app', ["/home/user/.Desktop", "-desktop", document.querySelector('#desktop-layer')])
        // WebDesktopEnvironment.Open('/Applications/Finder.app', ["/home/user",])
    }

    /**
    * @param {string} appPath
    * @param {string[]} args
    */
    static async Open(appPath, args){
        WebDesktopEnvironment.fetchApp(appPath).then(async appManifest =>{
            if (appManifest === undefined) return //TODO return err
            if (WebDesktopEnvironment.Applications[appManifest.appId] === undefined){
                WebDesktopEnvironment.load2(appManifest, () =>{
                    WebDesktopEnvironment.Applications[appManifest.appId].NewWindow(args)
                })
            } else {
                WebDesktopEnvironment.Applications[appManifest.appId].NewWindow(args)
            }
        })
        
    }
    
    /**
    * @param {string} appManifest
    * @param {function} onload callback after script loading
    */
    static async load2(appManifest, onload){
        let appElem = document.createElement("div")
        appElem.setAttribute("appId", appManifest.appId)
        //TODO Render scripts nodes on server
        //FIXME Not support more than one js now :)
        let script = document.createElement("script")
        script.setAttribute("src", appManifest.js[0]) //FIXME path by fs read
        script.setAttribute("async", "false") //TODO Possible may creates a problems??
        appElem.appendChild(script)

        document.getElementById("applications").appendChild(appElem)
        script.addEventListener('load', (event) => {
            let newApp = eval(`new ${appManifest.appId}()`);
            //TODO Check if newApp undefined
            WebDesktopEnvironment.Applications[appManifest.appId] = newApp;
            onload()
        })
        return //TODO return result
    }

    /**
    * @param {string} path
    * @returns {Object | undefined} //FIXME
    */
    static async fetchApp(path){
        const params = new URLSearchParams({path: path})
        const response = await fetch(`/system/libs/apps/loadApp?` + params)
        if (response.status != 200){
            return undefined
        }
        const appManifest = response.json()
        return appManifest
    }

    /**
    * @param {string} appId
    * @param {number} width
    * @param {number} height
    * @returns {HTMLElement}
    */
    static CreateNewWindow(appId, width, height) {    
        let newWindow = document.createElement("div")
        newWindow.setAttribute('appid', appId)
        if (WebDesktopEnvironment.isMobile){
            newWindow.setAttribute("class", "MobileApplicationWindow")
            document.body.querySelector('#windows-layer').appendChild(newWindow)
            return newWindow
        } else {
            newWindow.setAttribute("class", "WindowFrame ConvexElement")
            newWindow.setAttribute("windowId", "SuperUniqUUID") //TODO:

            newWindow.style.width = width.toString() + "px"
            newWindow.style.height = height.toString() + "px"

            document.body.querySelector('#windows-layer').appendChild(newWindow)
            // WindowsCompositor.bringWindowToFront(newWindow)
            return newWindow
        }
    }
    /**
    * @param {HTMLElement} window
    */
    static CloseWindow(window) {
        window.remove()
    }

    static CloseFocusedWindow() {
        if (document.body.querySelector('#windows-layer').childElementCount > 1){
            document.body.querySelector('#windows-layer').lastElementChild.remove()
        }
    }

    /**
    * @param {string} html
    */
    static SetBasicWindow(html){
        this.basicWindow = html
    }

    /**
    * @returns {string}
    */
    static GetBasicWindow(){
        return this.basicWindow
    }

    /**
    * @param {string} alertText
    */
    static Alert(alertText){
        WebDesktopEnvironment.CreateAlertWindow(alertText)
        console.log(alertText)
    }

    /**
    * @param {string} alertText
    */
    static CreateAlertWindow(alertText){
        let newWindow = document.createElement("div")
        newWindow.setAttribute("class", "WindowFrameless")
        newWindow.setAttribute("windowId", "SuperUniqUUID") //TODO:
        newWindow.style.cssText = "position:absolute;width:450px;height:116px; margin-left: -225px; margin-top:-58px;left: 50%;top: 50%;background-color:#FFFFFF;border: 1px solid #000000;box-shadow: 2px 2px 0px #000000;"
        
        let alertImage = document.createElement("img")
        alertImage.setAttribute("src", "/res/sys/wde/icons/ohno.png")
        alertImage.style.cssText = "position:absolute; width:64px;height:64px;top:15px;left:25px"
        newWindow.appendChild(alertImage)

        let errorText = document.createElement("div")
        errorText.style.cssText = "position:absolute; width: 300px; left:128px; top:30px;font-family: 'Virtue';"
        errorText.innerHTML = alertText
        newWindow.appendChild(errorText)

        let closeButton = document.createElement("button")
        closeButton.style.cssText = "position:absolute; left: 382px; bottom: 10px; background-color:#FFFFFF; width: 55px; height:18px; font-family: 'Virtue'; border-radius:4px;border: 1px solid #000000;"
        closeButton.innerHTML = "Close"
        closeButton.addEventListener('click', () => { newWindow.remove()})
        newWindow.appendChild(closeButton)

        document.body.querySelector('#windows-layer').appendChild(newWindow)
    }

    static CheckMobile(){    
        var check = false;
        (function(a){if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino|android|ipad|playbook|silk/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4))) check = true;})(navigator.userAgent||navigator.vendor||window.opera);
        return check;
    }
}

var getJSON = function(url, callback) {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', url, true);
    xhr.responseType = 'json';
    xhr.onload = function() {
      var status = xhr.status;
      if (status === 200) {
        callback(null, xhr.response);
      } else {
        callback(status, xhr.response);
      }
    };
    xhr.send();
};

class WindowsCompositor{
    static windowsLayer

    constructor(){
        this.windowLayer = document.body.querySelector('#windows-layer')
        WindowsCompositor.windowsLayer = document.body.querySelector('#windows-layer')
        if (!WebDesktopEnvironment.isMobile) {
            let startDrag = function(event) {
                let window = event.target.closest('.WindowFrame')
                WindowsCompositor.bringWindowToFront(window)
                if (event.target.classList.contains("DragArea")){
                    let xPosInit = event.offsetX
                    let yPosInit = event.offsetY
                    let dragWindow = function(event){
                        window.style.left = `${event.clientX - xPosInit}px`
                        window.style.top = `${event.clientY - yPosInit}px`
                    }
                    let stopDrag = function(){
                        removeEventListener('mousemove', dragWindow)
                        removeEventListener('mouseup', stopDrag)
                    }
    
                    addEventListener('mousemove', dragWindow)
                    addEventListener('mouseup', stopDrag)
                }
            }
            WindowsCompositor.windowsLayer.addEventListener('mousedown', startDrag)
        }
    }
    
    /**
     * @param {HTMLElement} window
    */
    static bringWindowToFront(window){ //FIXME
        if (window == null | window == undefined){
            return
        }
        let previousWindow = WindowsCompositor.windowsLayer.lastChild
        if (window != previousWindow){
            WindowsCompositor.windowsLayer.insertBefore(previousWindow, window)
        }
        if (!window.classList.contains("Focused")){
                previousWindow.classList.remove("Focused")
                window.classList.add("Focused")
        }
        // WindowsCompositor.ChangeURL(window)
    }


    static ChangeURL(appWindow){
        let appId = appWindow.getAttribute('appid')
        window.history.replaceState(null, "", `/${appId}/`);
    }
}


class WebFS{
    /**
    * @param {string} path
    * @returns {boolean}
    */
    static async CreateDirectory(path){
        if (path == undefined){
            WebDesktopEnvironment.Alert("Path is undefined")
            return false
        }
        const params = new URLSearchParams({
            path: `${path}/New Directory`
        })
        const response = await fetch(`/fs/createDir?` + params)
        if (response.status != 200){
            WebDesktopEnvironment.Alert("DIRCTORY CREATION ERROR") //TODO
            return false
        }
        return true
    }

    /**
    * @param {string} path
    * @returns {boolean}
    */
    static async DeleteFile(path){
        const params = new URLSearchParams({
            path: path
        })
        const response = await fetch(`/fs/delete?` + params)
        if (response.status != 200){
            WebDesktopEnvironment.Alert("DELETE ERROR") //TODO
            return false
        }
        return true
    }

    /**
    * @param {string} path
    * @returns {boolean}
    */
    static async MoveFile(sourcePath, targetPath){
        const params = new URLSearchParams({
            sourcePath: sourcePath,
            targetPath: targetPath
        })
        const response = await fetch(`/fs/move?` + params)
        if (response.status != 200){
            // WebDesktopEnvironment.Alert("Move ERROR") //TODO
            return false
        }
        return true
    }
}