define(['loading', 'dialogHelper', 'dom', 'listViewStyle', 'emby-input', 'emby-button', 'paper-icon-button-light', 'css!./directorybrowser', 'formDialogStyle', 'emby-linkbutton'], function(loading, dialogHelper, dom) {
    'use strict';

    function getSystemInfo() {
        return systemInfo ? Promise.resolve(systemInfo) : ApiClient.getPublicSystemInfo().then(
            function(info) {
                systemInfo = info;
                return info;
            }
        )
    }

    function onDialogClosed() {
        loading.hide()
    }

    function refreshDirectoryBrowser(page, path, fileOptions, updatePathOnError) {
        if (path && typeof path !== 'string') {
            throw new Error("invalid path");
        }
        
        loading.show();
        
        var promises = [];

        if ("Network" === path) {
            promises.push(ApiClient.getNetworkDevices())
        } else {
            if (path) { 
                promises.push(ApiClient.getDirectoryContents(path, fileOptions));
                promises.push(ApiClient.getParentPath(path));
            } else { 
                promises.push(ApiClient.getDrives());
            }
        }

        Promise.all(promises).then(
            function(responses) {
                var folders = responses[0];
                var parentPath = responses[1] || "";
                var html = "";

                page.querySelector(".results").scrollTop = 0;
                page.querySelector("#txtDirectoryPickerPath").value = path || "";
                
                if (path) {
                    html += getItem("lnkPath lnkDirectory", "", parentPath, "...");
                }
                for (var i = 0, length = folders.length; i < length; i++) {
                    var folder = folders[i];
                    var cssClass = "File" === folder.Type ? "lnkPath lnkFile" : "lnkPath lnkDirectory";
                    html += getItem(cssClass, folder.Type, folder.Path, folder.Name);
                }
                
                if (!path) {
                    html += getItem("lnkPath lnkDirectory", "", "Network", Globalize.translate("ButtonNetwork"));
                }

                page.querySelector(".results").innerHTML = html;
                loading.hide();
            }, function() {
                if (updatePathOnError) {
                    page.querySelector("#txtDirectoryPickerPath").value = "";
                    page.querySelector(".results").innerHTML = "";
                    loading.hide();
                }
            }
        );
    }

    function getItem(cssClass, type, path, name) {
        var html = "";
        html += '<div class="listItem listItem-border ' + cssClass + '" data-type="' + type + '" data-path="' + path + '">';
        html += '<div class="listItemBody" style="padding-left:0;padding-top:.5em;padding-bottom:.5em;">';
        html += '<div class="listItemBodyText">';
        html += name;
        html += "</div>";
        html += "</div>";
        html += '<i class="md-icon" style="font-size:inherit;">arrow_forward</i>';
        html += "</div>";
        return html;
    }

    function getEditorHtml(options, systemInfo) {
        var html = "";
        html += '<div class="formDialogContent scrollY">';
        html += '<div class="dialogContentInner dialog-content-centered" style="padding-top:2em;">';
        if (!options.pathReadOnly) {
            var instruction = options.instruction ? options.instruction + "<br/><br/>" : "";
            html += '<div class="infoBanner" style="margin-bottom:1.5em;">';
            html += instruction;
            html += Globalize.translate("MessageDirectoryPickerInstruction").replace("{0}", "<b>\\\\server</b>").replace("{1}", "<b>\\\\192.168.1.101</b>");
            if ("synology" === (systemInfo.PackageName || "").toLowerCase()) {
                html += "<br/>";
                html += "<br/>";
                html += '<a is="emby-linkbutton" class="button-link" href="https://web.archive.org/web/20181216120305/https://github.com/MediaBrowser/Wiki/wiki/Synology-:-Setting-Up-Your-Media-Library-Share" target="_blank">';
                html += Globalize.translate("LearnHowToCreateSynologyShares");
                html += "</a>";
            } else if ("bsd" === systemInfo.OperatingSystem.toLowerCase()) {
                html += "<br/>";
                html += "<br/>";
                html += Globalize.translate("MessageDirectoryPickerBSDInstruction");
                html += "<br/>";
                html += '<a is="emby-linkbutton" class="button-link" href="http://doc.freenas.org/9.3/freenas_jails.html#add-storage" target="_blank">';
                html += Globalize.translate("ButtonMoreInformation");
                html += "</a>";
            } else if ("linux" === systemInfo.OperatingSystem.toLowerCase()) {
                html += "<br/>";
                html += "<br/>";
                html += Globalize.translate("MessageDirectoryPickerLinuxInstruction");
                html += "<br/>";
            }
            html += "</div>"
        }
        html += '<form style="margin:auto;">';
        html += '<div class="inputContainer" style="display: flex; align-items: center;">';
        html += '<div style="flex-grow:1;">';
        var labelKey;
        if (options.includeFiles !== true) {
            labelKey = "LabelFolder";
        } else {
            labelKey = "LabelPath";
        }
        var readOnlyAttribute = options.pathReadOnly ? " readonly" : "";
        html += '<input is="emby-input" id="txtDirectoryPickerPath" type="text" required="required" ' + readOnlyAttribute + ' label="' + Globalize.translate(labelKey) + '"/>';
        html += "</div>";
        if (!readOnlyAttribute)  {
            html += '<button type="button" is="paper-icon-button-light" class="btnRefreshDirectories emby-input-iconbutton" title="' + Globalize.translate("ButtonRefresh") + '"><i class="md-icon">search</i></button>';
        }
        html += "</div>";
        if (!readOnlyAttribute) { 
            html += '<div class="results paperList" style="max-height: 200px; overflow-y: auto;"></div>';
        }
        if (options.enableNetworkSharePath) {
            html += '<div class="inputContainer" style="margin-top:2em;">';
            html += '<input is="emby-input" id="txtNetworkPath" type="text" label="' + Globalize.translate("LabelOptionalNetworkPath") + '"/>';
            html += '<div class="fieldDescription">';
            html += Globalize.translate("LabelOptionalNetworkPathHelp");
            html += "</div>";
            html += "</div>";
        }
        html += '<div class="formDialogFooter">';
        html += '<button is="emby-button" type="submit" class="raised button-submit block formDialogFooterItem">' + Globalize.translate("ButtonOk") + "</button>";
        html += "</div>";
        html += "</form>";
        html += "</div>";
        html += "</div>";
        html += "</div>";

        return html;
    }

    function alertText(text) {
        alertTextWithOptions({
            text: text
        })
    }

    function alertTextWithOptions(options) {
        require(["alert"], function(alert) {
            alert(options)
        })
    }

    function validatePath(path, validateWriteable, apiClient) {
        return apiClient.ajax({
            type: "POST",
            url: apiClient.getUrl("Environment/ValidatePath"),
            data: {
                ValidateWriteable: validateWriteable,
                Path: path
            }
        }).catch(function(response) {
            if (response) {
                // TODO All alerts (across the project), should use Globalize.translate()
                if (response.status === 404) {
                    alertText("The path could not be found. Please ensure the path is valid and try again.");
                    return Promise.reject();
                }
                if (response.status === 500) {
                    if (validateWriteable) {
                        alertText("Jellyfin Server requires write access to this folder. Please ensure write access and try again.");
                    } else {
                        alertText("The path could not be found. Please ensure the path is valid and try again.")
                    }
                    return Promise.reject()
                }
            }
            return Promise.resolve()
        });
    }

    function initEditor(content, options, fileOptions) {
        content.addEventListener("click", function(e) {
            var lnkPath = dom.parentWithClass(e.target, "lnkPath");
            if (lnkPath) {
                var path = lnkPath.getAttribute("data-path");
                if (lnkPath.classList.contains("lnkFile")) {
                    content.querySelector("#txtDirectoryPickerPath").value = path;
                 } else {
                    refreshDirectoryBrowser(content, path, fileOptions, true)
                 };
            }
        });

        content.addEventListener("click", function(e) {
            if (dom.parentWithClass(e.target, "btnRefreshDirectories")) {
                var path = content.querySelector("#txtDirectoryPickerPath").value;
                refreshDirectoryBrowser(content, path, fileOptions);
            }
        });

        content.addEventListener("change", function(e) {
            var txtDirectoryPickerPath = dom.parentWithTag(e.target, "INPUT");
            if (txtDirectoryPickerPath && "txtDirectoryPickerPath" === txtDirectoryPickerPath.id) {
                refreshDirectoryBrowser(content, txtDirectoryPickerPath.value, fileOptions);
            }
        });

        content.querySelector("form").addEventListener("submit", function(e) {
            if (options.callback) {
                var networkSharePath = this.querySelector("#txtNetworkPath");
                networkSharePath = networkSharePath ? networkSharePath.value : null;
                var path = this.querySelector("#txtDirectoryPickerPath").value;
                validatePath(path, options.validateWriteable, ApiClient).then(
                    function() {
                        options.callback(path, networkSharePath);
                    }
                );
            }
            e.preventDefault();
            e.stopPropagation();
            return false;
        });
    }

    function getDefaultPath(options) {
        if (options.path) {
            Promise.resolve(options.path);
        } else {
            ApiClient.getJSON(ApiClient.getUrl("Environment/DefaultDirectoryBrowser")).then(
                function(result) {
                    return result.Path || "";
                }, function() {
                    return "";
                }
            );
        }
    }

    function directoryBrowser() {
        var currentDialog;
        var self = this;
        self.show = function(options) {
            options = options || {};
            var fileOptions = {
                includeDirectories: true
            };
            if (options.includeDirectories != null) {
                fileOptions.includeDirectories = options.includeDirectories;
            }
            if (options.includeFiles != null) {
                fileOptions.includeFiles = options.includeFiles;
            }
            Promise.all([getSystemInfo(), getDefaultPath(options)]).then(
                function(responses) {
                    var systemInfo = responses[0];
                    var initialPath = responses[1];
                    var dlg = dialogHelper.createDialog({
                            size: "medium-tall",
                            removeOnClose: true,
                            scrollY: false
                        });
                    dlg.classList.add("ui-body-a");
                    dlg.classList.add("background-theme-a");
                    dlg.classList.add("directoryPicker");
                    dlg.classList.add("formDialog");

                    var html = "";
                    html += '<div class="formDialogHeader">';
                    html += '<button is="paper-icon-button-light" class="btnCloseDialog autoSize" tabindex="-1"><i class="md-icon">&#xE5C4;</i></button>';
                    html += '<h3 class="formDialogHeaderTitle">';
                    html += options.header || Globalize.translate("HeaderSelectPath");
                    html += "</h3>";
                    html += "</div>";
                    html += getEditorHtml(options, systemInfo);
                    dlg.innerHTML = html;
                    initEditor(dlg, options, fileOptions);
                    dlg.addEventListener("close", onDialogClosed);
                    dialogHelper.open(dlg);
                    dlg.querySelector(".btnCloseDialog").addEventListener("click", function() {
                        dialogHelper.close(dlg)
                    });
                    currentDialog = dlg;
                    dlg.querySelector("#txtDirectoryPickerPath").value = initialPath;
                    var txtNetworkPath = dlg.querySelector("#txtNetworkPath");
                    if (txtNetworkPath) {
                        txtNetworkPath.value = options.networkSharePath || "";
                    }
                    if (!options.pathReadOnly) {
                        refreshDirectoryBrowser(dlg, initialPath, fileOptions, true);
                    }
                }
            );
        };
        self.close = function() {
            if (currentDialog) {
                dialogHelper.close(currentDialog);
            }
        }
    }

    var systemInfo;
    return directoryBrowser
});
