import {
  app,
  BrowserWindow,
  ipcMain,
  dialog,
  Menu,
  MenuItemConstructorOptions,
  SaveDialogSyncOptions,
  OpenDialogSyncOptions
} from 'electron';
import * as Store from "electron-store";
import * as fs from "fs";
import * as path from "path";
import * as util from 'util';
import * as log from "electron-log";
import * as parseArgs from "minimist";
import { Validator } from "jsonschema";
import * as jsdom from "jsdom";
const { JSDOM } = jsdom;
const { window } = new JSDOM();
let $ = require("../third_party/js/jquery-3.5.1.js")(window);

let validator = new Validator();

let all_schemas = [
  path.join(app.getAppPath(), "src/schemas/current_schema.json"),
  path.join(app.getAppPath(), "src/schemas/1.0.0_schema.json"),
]
let schema_updaters = {
  "1.0.0_schema.json": update_1_0_0_schema
}
log.transports.file.resolvePath = () => path.join(app.getAppPath(), "debug.log");

const store = new Store();
let debug = false;
let menu_template:MenuItemConstructorOptions[] = [
  {
    label: "File",
    submenu: [
      {
        label: "Save",
        accelerator: "Ctrl+S",
        click: function (item, window, event) {
          window.webContents.send("save", false);
        }
      },
      {
        label: "Save As",
        accelerator: "Ctrl+Shift+S",
        click: function (item, window, event) {
          window.webContents.send("save", true);
        }
      },
      {
        label: "New File",
        accelerator: "Ctrl+N",
        click: function (item, window, event) {
          window.webContents.send("try-start-new");
        }
      },
      {
        label: "Open",
        accelerator: "Ctrl+O",
        click: function (item, window, event) {
          window.webContents.send("try-open");
        }
      },
      {
        label: "Open Recent",
        submenu:[]
      },
      {
        label: "Exit",
        click: function (item, window, event) {
          window.webContents.send("try-quit");
        }
      }
    ]
  },
  {
    label: "Edit",
    submenu: [
      {
        label: "Cut",
        role: "cut",
      },
      {
        label: "Copy",
        role: "copy",
      },
      {
        label: "Paste",
        role: "paste",
      },
      {
        label: "Select All",
        accelerator: "Ctrl+A",
        click: function (item, window, event) {
          window.webContents.send("select-all");
        }
      },
      {
        label: "Undo",
        accelerator: "Ctrl+Z",
        click: function (item, window, event) {
          window.webContents.send("undo");
        }
      },
      {
        label: "Redo",
        accelerator: "Ctrl+Y",
        click: function (item, window, event) {
          window.webContents.send("redo");
        }
      }
    ]
  },
]

// Handle creating/removing shortcuts on Windows when installing/uninstalling.
if (require('electron-squirrel-startup')) { // eslint-disable-line global-require
  app.quit();
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', start);

// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.exit();
  }
});

app.on('activate', () => {
  // On OS X it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (BrowserWindow.getAllWindows().length === 0) {
    start();
  }
});

app.on("before-quit", (event) => {
  event.preventDefault();
  BrowserWindow.getFocusedWindow().webContents.send("try-quit");
})

function start() {
  let args = parseArgs(process.argv.slice(1));
  if (args["_"][0] == ".") {
    args["_"].splice(0, 1);
  }

  if (args["debug"]) {
    debug = true;
  }
  if (args["_"].length > 0) {
    for (let file_path of args["_"]) {
      log.info(file_path);
      openFile(file_path, true, true);
    }
  } else {
    createSplashScreen();
  }
}

function createSplashScreen() {
  const splash_screen = new BrowserWindow({
    width: 806,
    height: 529,
    autoHideMenuBar: true,
    webPreferences: {
      nodeIntegration: true
    },
    resizable: false,
    frame: true
  });

  if (!store.has("recent_files")) {
    store.set("recent_files", []);
  } else {
    updateRecentFiles();
  }

  splash_screen.loadFile(path.join(app.getAppPath(), "src/splash.html"));
  // Open the DevTools.
  if (debug) {
    splash_screen.webContents.openDevTools();
  }
  // store.openInEditor();
}

function createEditorWindow(file_name, json) {
  let main_window = new BrowserWindow({
    width: 1000,
    height: 600,
    autoHideMenuBar: false,
    webPreferences: {
      nodeIntegration: true
    }
  })
      .on("close", (event) => {
        event.preventDefault();
        main_window.webContents.send("try-close-window");
      })
  main_window.maximize();
  updateMenuBar();

  main_window.loadFile(path.join(app.getAppPath(), "src/editor.html"))
    .then(() => {
      main_window.webContents.send("open", file_name, json);
    });
  // Open the DevTools.
  if (debug) {
    main_window.webContents.openDevTools();
  }
  return main_window;
}

function createNew() {
  let old_window = BrowserWindow.getFocusedWindow();
  let json = loadJson(path.join(app.getAppPath(), "src/default.json"));
  let main_window = createEditorWindow(null, json);
  old_window.destroy();
}

function chooseFile(title, for_save=false) {
  let options:SaveDialogSyncOptions = {
    title: title,
    defaultPath: <string>store.get("default_dir", app.getPath("documents")),
    filters: [
      {name: 'json', extensions: ['json']},
      {name: 'All Files', extensions: ['*']}
    ]
  }

  let file_path;
  if (for_save) {
    file_path = dialog.showSaveDialogSync(options);
  } else {
    file_path = dialog.showOpenDialogSync(<OpenDialogSyncOptions>options);
  }
  if (file_path) {
    if (for_save) {
      return file_path
    } else {
      return file_path[0];
    }
  }
}

function openFile(file_path="", make_new_file=false, make_new_window=false) {
  if (file_path === "") {
    file_path = chooseFile("Open website data");
  }
  if (file_path && fs.existsSync(file_path)) {
    let result = checkFile(file_path);
    if (result) {
      let json = getUpdatedJson(result);
      updateRecentFiles(file_path);
      if (make_new_file) {
        let old_window = BrowserWindow.getFocusedWindow();
        createEditorWindow(file_path, json);
        if (old_window && !make_new_window) {
          old_window.close();
        }
      } else {
        let window = BrowserWindow.getFocusedWindow();
        window.webContents.send("open", file_path, json);
      }
    }
  }
}

function saveFile(file_name, json_data) {
  if (file_name == null) {
    let file_path = chooseFile("Save website data", true);
    if (file_path) {
      updateRecentFiles(file_path);
      file_name = file_path;
    }
  }
  if (file_name) {
    fs.writeFileSync(file_name, JSON.stringify(json_data, null, 4));
    BrowserWindow.getFocusedWindow().webContents.send("file-saved", file_name);
  }
}

function updateRecentFiles(new_file=null) {
  let recent_files = <Array<string>>store.get("recent_files");
  if (new_file != null) {
    store.set("default_dir", new_file);
    if (recent_files.includes(new_file)) {
      recent_files.splice(recent_files.indexOf(new_file), 1);
    }
    recent_files.splice(0, 0, new_file);
  }
  let files_to_delete = [];
  $.each(recent_files, (i, file) => {
    if (!fs.existsSync(file)) {
      console.log(file);
      files_to_delete.push(i);
    }
  });
  for (let index of files_to_delete) {
    recent_files.splice(index, 1);
  }
  store.set("recent_files", recent_files);
  updateMenuBar();
}

function updateMenuBar() {
  let recent_files = <Array<string>>store.get("recent_files");
  for (let menu of <MenuItemConstructorOptions[]>menu_template[0].submenu) {
    if (menu.label === "Open Recent") {
      menu.submenu = []
      for (let file of recent_files) {
        if (fs.existsSync(file)) {
          menu.submenu.push({
            label: file, click: () => {
              BrowserWindow.getFocusedWindow().webContents.send("try-open", file);
            }
          });
        }
      }
    }
  }
  let menu = Menu.buildFromTemplate(menu_template);
  Menu.setApplicationMenu(menu);
}

function loadJson(file_path) {
  let file = fs.readFileSync(file_path);
  return JSON.parse(file.toString());
}

function checkFile(file_path) {
  let json = loadJson(file_path);
  let result;
  let valid_result = false;
  for (let schema_path of all_schemas) {
    let schema = loadJson(schema_path);
    result = validator.validate(json, schema);
    if (result.valid) {
      let split_schema = schema_path.split(/[\\/]/);
      result = {"schema": split_schema[split_schema.length-1], "result": result};
      valid_result = true;
      break;
    }
  }
  if (valid_result) {
    return result;
  }
}

function getUpdatedJson(validation_result) {
  let json = validation_result["result"].instance;
  let schema = validation_result["schema"];
  if (schema === "current_schema.json") {
    return json
  }
  return schema_updaters[schema](json);
}

function update_1_0_0_schema(json) {
  $.each(json, (i, table_data) => {
    table_data["id"] = "table"+i.toString();
    table_data["tab_name"] = table_data["tab-name"];
    delete table_data["tab-name"];
    let col_dict = {};
    $.each(table_data["col-def"], (j, col_data) => {
      col_dict[col_data["field"]] = "column"+j.toString();
      col_data["field"] = "column"+j.toString();
    });
    table_data["columns"] = table_data["col-def"];
    delete table_data["col-def"];
    $.each(table_data["rows"], (j, row_data) => {
      row_data["uid"] = "row"+j.toString();
      $.each(col_dict, (old_key, new_key) => {
        row_data[new_key] = row_data[old_key];
        delete row_data[old_key];
      });
    });
    if (!table_data.hasOwnProperty("filter")) {
      table_data["filter"] = false;
    }
    if (!table_data.hasOwnProperty("hidden")) {
      table_data["hidden"] = false;
    }
    if (!table_data.hasOwnProperty("tab_name")) {
      table_data["tab_name"] = "";
    }
    if (!table_data.hasOwnProperty("description")) {
      table_data["description"] = "";
    }
  });
  json = {
    "version": "1.1.0",
    "tables": json,
  }
  return json;
}

function duplicateJson(json) {
  return JSON.parse(JSON.stringify(json));
}

function removeRecentFile(file) {
  let recent_files = <Array<string>>store.get("recent_files");
  recent_files.splice(recent_files.indexOf(file), 1);
  store.set("recent_files", recent_files);
}

ipcMain.handle("get-store-value", (event, key) => {
  return store.get(key)
})

ipcMain.handle("remove-recent-file", (event, file) => {
  removeRecentFile(file);
})

ipcMain.on("create-new", (event) => {
  createNew();
})

ipcMain.on("save", (event, file_name, json_data) => {
  saveFile(file_name, json_data);
})

ipcMain.on("open", (event, file_path="", new_file=false, new_window=false) => {
  openFile(file_path, new_file)
})

ipcMain.on("quit", (event) => {
  if (BrowserWindow.getAllWindows().length > 1) {
    BrowserWindow.getFocusedWindow().destroy();
  } else {
    app.exit();
  }
})

ipcMain.on("close-window", (event) => {
  BrowserWindow.getFocusedWindow().destroy();
})