import { app, BrowserWindow, Menu, dialog, ipcMain } from "electron";
import type { OpenDialogOptions, SaveDialogOptions } from "electron";
import { readFile, writeFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));

app.setAppUserModelId("de.wilkensxl.envhelper");

async function createWindow() {
  const win = new BrowserWindow({
    width: 1220,
    height: 820,
    minWidth: 980,
    minHeight: 680,
    title: "EnvHelper",
    frame: true,
    autoHideMenuBar: true,
    backgroundColor: "#f6f7f4",
    webPreferences: {
      preload: path.join(__dirname, "preload.js"),
      contextIsolation: true,
      nodeIntegration: false,
      sandbox: true,
      webSecurity: true,
      allowRunningInsecureContent: false,
      devTools: !app.isPackaged
    }
  });

  Menu.setApplicationMenu(null);
  win.webContents.setWindowOpenHandler(() => ({ action: "deny" }));
  win.webContents.on("will-navigate", (event, url) => {
    const currentUrl = win.webContents.getURL();
    if (!currentUrl || url === currentUrl || (!app.isPackaged && url.startsWith("http://127.0.0.1:5173"))) {
      return;
    }

    event.preventDefault();
  });

  if (!app.isPackaged) {
    await win.loadURL("http://127.0.0.1:5173");
  } else {
    await win.loadFile(path.join(__dirname, "../dist/index.html"));
  }
}

ipcMain.handle("envhelper:open-file", async (event) => {
  const owner = BrowserWindow.fromWebContents(event.sender);
  const options = {
    properties: ["openFile"],
    filters: [
      { name: "Environment files", extensions: ["env", "txt"] },
      { name: "All files", extensions: ["*"] }
    ]
  } satisfies OpenDialogOptions;

  const result = owner ? await dialog.showOpenDialog(owner, options) : await dialog.showOpenDialog(options);

  if (result.canceled || result.filePaths.length === 0) {
    return null;
  }

  const filePath = result.filePaths[0];
  return {
    path: filePath,
    content: await readFile(filePath, "utf8")
  };
});

ipcMain.handle("envhelper:save-file", async (event, content: string) => {
  if (typeof content !== "string") {
    throw new TypeError("Save content must be a string.");
  }

  const owner = BrowserWindow.fromWebContents(event.sender);
  const options = {
    defaultPath: ".env",
    filters: [
      { name: "Environment files", extensions: ["env", "txt"] },
      { name: "All files", extensions: ["*"] }
    ]
  } satisfies SaveDialogOptions;

  const result = owner ? await dialog.showSaveDialog(owner, options) : await dialog.showSaveDialog(options);

  if (result.canceled || !result.filePath) {
    return null;
  }

  await writeFile(result.filePath, content, "utf8");
  return result.filePath;
});

app.whenReady().then(createWindow);

app.on("window-all-closed", () => {
  if (process.platform !== "darwin") {
    app.quit();
  }
});

app.on("activate", () => {
  if (BrowserWindow.getAllWindows().length === 0) {
    void createWindow();
  }
});