#!/usr/bin/env node

var readline = require("readline");
var child    = require("child_process");
var path     = require("path");
var fs       = require("fs");

function spawn(cmd, args, callback) {
  console.log(">", cmd, args);

  var spawn = child.spawn(cmd, args, { stdio: "inherit" });

  spawn.on("exit", function (code) {
    if (code === 0) {
      if (callback) callback();
    } else {
      console.log("Killing...");
      process.exit(1);
    }
  });
}

function spawnMultiple(cmds) {
  function next() {
    var cmd = cmds.shift();
    if (cmd) {
      spawn(cmd.command, cmd.args, next);
    } else {
      process.exit();
    }
  }

  next();
}

function write(filename, content) {
  console.log(filename);
  fs.writeFileSync(filename, content);
}

var BABEL_PLUGIN_PREFIX = "babel-plugin-";

var cmds = {
  init: function () {
    var name = path.basename(process.cwd());

    if (name.indexOf(BABEL_PLUGIN_PREFIX) === 0) {
      name = name.slice(BABEL_PLUGIN_PREFIX.length);
    }

    write("package.json", JSON.stringify({
      name: BABEL_PLUGIN_PREFIX + name,
      version: "1.0.0",
      description: "",
      license: "MIT",
      main: "lib/index.js",

      devDependencies: {
        babel: "^5.6.0"
      },

      peerDependencies: {
        babel: "^5.6.0"
      },

      scripts: {
        build: "babel-plugin build",
        push:  "babel-plugin publish",
        test:  "babel-plugin test"
      },

      keywords: ["babel-plugin"]
    }, null, "  "));

    write(".npmignore", "node_modules\n*.log\nsrc");

    write(".gitignore", "node_modules\n*.log\nlib");

    fs.mkdirSync("src");
    write("src/index.js", "");
  },

  build: function () {
    spawn("babel", ["src", "--out-dir", "lib"]);
  },

  publish: function () {
    var rl = readline.createInterface({
      input: process.stdin,
      output: process.stdout
    });

    var pkg = require(process.cwd() + "/package.json");
    console.log("Current verison:", pkg.version);

    rl.question("New version (enter nothing for patch): ", function (newVersion) {
      newVersion = newVersion || "patch";

      spawnMultiple([
        { command: "git", args: ["pull"] },
        { command: "git", args: ["push"] },
        { command: "babel-plugin", args: ["build"] },
        { command: "npm", args: ["version", newVersion] },
        { command: "npm", args: ["publish"] },
        { command: "git", args: ["push", "--follow-tags"] }
      ]);
    });
  }
};

var cmd = cmds[process.argv[2]];
if (cmd) {
  cmd();
} else {
  console.error("Unknown command:", cmd);
  process.exit(1);
}