import {Config} from "data";
import Logger from "common/logger";
import AddonManager from "./addonmanager";
import AddonError from "../structs/addonerror";
import Settings from "./settingsmanager";
import Strings from "./strings";
import IPC from "./ipc";
import Events from "./emitter";

import Toasts from "../ui/toasts";
import Modals from "../ui/modals";
import SettingsRenderer from "../ui/settings";

const path = require("path");
const electron = require("electron");
const vm = require("vm");
// const electronRemote = require("electron").remote;

// window.$ = window.jQuery = function() {}

export default new class PluginManager extends AddonManager {
    get name() {return "PluginManager";}
    get moduleExtension() {return ".js";}
    get extension() {return ".plugin.js";}
    get duplicatePattern() {return /\.plugin\([0-9]+\)\.js/;}
    get addonFolder() {return path.resolve(Config.dataPath, "plugins");}
    get prefix() {return "plugin";}
    get language() {return "javascript";}

    constructor() {
        super();
        this.promises = {};
        this.onSwitch = this.onSwitch.bind(this);
        this.observer = new MutationObserver((mutations) => {
            for (let i = 0, mlen = mutations.length; i < mlen; i++) {
                this.onMutation(mutations[i]);
            }
        });
    }

    async initialize() {
        const errors = await super.initialize();
        this.setupFunctions();
        Settings.registerPanel("plugins", Strings.Panels.plugins, {element: () => SettingsRenderer.getAddonPanel(Strings.Panels.plugins, this.addonList, this.state, {
            type: this.prefix,
            folder: this.addonFolder,
            onChange: this.togglePlugin.bind(this),
            reload: this.reloadPlugin.bind(this),
            refreshList: this.updatePluginList.bind(this),
            saveAddon: this.saveAddon.bind(this),
            editAddon: this.editAddon.bind(this),
            deleteAddon: this.deleteAddon.bind(this),
            prefix: this.prefix
        })});
        return errors;
    }

    /* Aliases */
    updatePluginList() {return this.updateList();}
    loadAllPlugins() {return this.loadAllAddons();}

    enablePlugin(idOrAddon) {return this.enableAddon(idOrAddon);}
    disablePlugin(idOrAddon) {return this.disableAddon(idOrAddon);}
    togglePlugin(id) {return this.toggleAddon(id);}

    unloadPlugin(idOrFileOrAddon) {return this.unloadAddon(idOrFileOrAddon);}
    loadPlugin(filename) {return this.loadAddon(filename);}

    async loadAddon(filename) {
        const error = await super.loadAddon(filename);
        if (error) Modals.showAddonErrors({plugins: [error]});
    }

    async reloadPlugin(idOrFileOrAddon) {
        const error = await this.reloadAddon(idOrFileOrAddon);
        if (error) Modals.showAddonErrors({plugins: [error]});
        return typeof(idOrFileOrAddon) == "string" ? this.addonList.find(c => c.id == idOrFileOrAddon || c.filename == idOrFileOrAddon) : idOrFileOrAddon;
    }

    /* Overrides */
    initializeAddon(addon) {
        if (!addon.exports) return new AddonError(addon.name, addon.filename, "Plugin had no exports", {message: "Plugin had no exports or no name property.", stack: ""});
        try {
            const PluginClass = addon.exports;
            const thePlugin = new PluginClass();
            addon.instance = thePlugin;
            addon.name = thePlugin.getName ? thePlugin.getName() : addon.name || "No name";
            addon.author = thePlugin.getAuthor ? thePlugin.getAuthor() : addon.author || "No author";
            addon.description = thePlugin.getDescription ? thePlugin.getDescription() : addon.description || "No description";
            addon.version = thePlugin.getVersion ? thePlugin.getVersion() : addon.version || "No version";
            try {
                if (typeof(addon.instance.load) == "function") addon.instance.load();
            }
            catch (error) {
                this.state[addon.id] = false;
                return new AddonError(addon.name, addon.filename, "load() could not be fired.", {message: error.message, stack: error.stack});
            }
        }
        catch (error) {return new AddonError(addon.name, addon.filename, "Could not be constructed.", {message: error.message, stack: error.stack});}
    }

    getFileModification(module, fileContent, meta) {
        fileContent += `\nif (module.exports.default) {module.exports = module.exports.default;}\nif (!module.exports.prototype || !module.exports.prototype.start) {module.exports = ${meta.exports || meta.name};}`;

        window.global = window;
        window.module = module;
        window.__filename = path.basename(module.filename);
        window.__dirname = this.addonFolder;
        const wrapped = `(${vm.compileFunction(fileContent, ["exports", "require", "module", "__filename", "__dirname"]).toString()})`;
        // console.log(module);
        module.exports = new Promise(resolve => {
            IPC.runScript(`${wrapped}(window.module.exports, window.require, window.module, window.__filename, window.__dirname)`).then(() => {
                // console.log(window.module);
                meta.exports = module.exports;
                module.exports = meta;
                delete window.module;
                delete window.__filename;
                delete window.__dirname;
                resolve();
            });
        });
        // module._compile(fileContent, module.filename);
        // meta.exports = module.exports;
        // module.exports = meta;
        return "";
    }

    startAddon(id) {return this.startPlugin(id);}
    stopAddon(id) {return this.stopPlugin(id);}
    getAddon(id) {return this.getPlugin(id);}

    startPlugin(idOrAddon) {
        const addon = typeof(idOrAddon) == "string" ? this.addonList.find(p => p.id == idOrAddon) : idOrAddon;
        if (!addon) return;
        const plugin = addon.instance;
        try {
            plugin.start();
        }
        catch (err) {
            this.state[addon.id] = false;
            Toasts.error(Strings.Addons.couldNotStart.format({name: addon.name, version: addon.version}));
            Logger.stacktrace(this.name, addon.name + " could not be started.", err);
            return new AddonError(addon.name, addon.filename, Strings.Addons.enabled.format({method: "start()"}), {message: err.message, stack: err.stack});
        }
        this.emit("started", addon.id);
        Toasts.show(Strings.Addons.enabled.format({name: addon.name, version: addon.version}));
    }

    stopPlugin(idOrAddon) {
        const addon = typeof(idOrAddon) == "string" ? this.addonList.find(p => p.id == idOrAddon) : idOrAddon;
        if (!addon) return;
        const plugin = addon.instance;
        try {
            plugin.stop();
        }
        catch (err) {
            this.state[addon.id] = false;
            Toasts.error(Strings.Addons.couldNotStop.format({name: addon.name, version: addon.version}));
            Logger.stacktrace(this.name, addon.name + " could not be stopped.", err);
            return new AddonError(addon.name, addon.filename, Strings.Addons.enabled.format({method: "stop()"}), {message: err.message, stack: err.stack});
        }
        this.emit("stopped", addon.id);
        Toasts.show(Strings.Addons.disabled.format({name: addon.name, version: addon.version}));
    }

    getPlugin(idOrFile) {
        const addon = this.addonList.find(c => c.id == idOrFile || c.filename == idOrFile);
        if (!addon) return;
        return addon;
    }

    setupFunctions() {
        // electronRemote.getCurrentWebContents().on("did-navigate-in-page", this.onSwitch.bind(this));
        Events.on("navigate", this.onSwitch);
        // ipc.on(IPCEvents.NAVIGATE, this.onSwitch);
        this.observer.observe(document, {
            childList: true,
            subtree: true
        });
    }

    onSwitch() {
        for (let i = 0; i < this.addonList.length; i++) {
            const plugin = this.addonList[i].instance;
            if (!this.state[this.addonList[i].id]) continue;
            if (typeof(plugin.onSwitch) === "function") {
                try {plugin.onSwitch();}
                catch (err) {Logger.stacktrace(this.name, "Unable to fire onSwitch for " + this.addonList[i].name + ".", err);}
            }
        }
    }

    onMutation(mutation) {
        for (let i = 0; i < this.addonList.length; i++) {
            const plugin = this.addonList[i].instance;
            if (!this.state[this.addonList[i].id]) continue;
            if (typeof plugin.observer === "function") {
                try {plugin.observer(mutation);}
                catch (err) {Logger.stacktrace(this.name, "Unable to fire observer for " + this.addonList[i].name + ".", err);}
            }
        }
    }
};