//  Copyright (C) 2018 Zilliqa
//
//  This file is part of zilliqa-js
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <https://www.gnu.org/licenses/>.

import * as fs from "fs";
import * as path from "path";

import * as rollup from "rollup";
import alias from "rollup-plugin-alias";
import commonjs from "rollup-plugin-commonjs";
import json from "rollup-plugin-json";
import globals from "rollup-plugin-node-globals";
import resolve from "rollup-plugin-node-resolve";
import typescript2 from "rollup-plugin-typescript2";
import ts from "typescript";

import project from "./project";
import { c, createLogger } from "./logger";

const logBundle = createLogger("bundle");

function getKeys(p) {
  const packageJsonFile = `${process.cwd()}/zilliqa/typescript/${p}/package.json`;
  const data = fs.readFileSync(packageJsonFile, "utf-8");
  const { dependencies } = JSON.parse(data);
  return dependencies ? Object.keys(dependencies) : [];
}

async function bundle() {
  try {
    const outputs = process.argv.slice(2)[0].split(",");
    const packages = project.packages.filter(
      ({ name }) => name !== "zilliqa-js-proto"
    );

    const count = packages.length;
    let cur = 0;
    for (const pkg of packages) {
      const logPrefix = c.grey(`[${++cur}/${count}] ${pkg.scopedName}`);
      logBundle(`${logPrefix} creating bundle`);

      const externals = project.packages
        .filter((p) => p.name !== pkg.name)
        .map((p) => p.scopedName);

      logBundle(`externals: ${externals}`);

      const bundle = await rollup.rollup({
        input: path.join(pkg.src, "index.ts"),
        plugins: [
          alias({
            proto: path.resolve(__dirname, "../", "includes/proto/index.js"),
          }),
          resolve({
            browser: true,
            jsnext: true,
            preferBuiltins: true,
          }),
          commonjs({
            namedExports: {
              [path.resolve(__dirname, "../", "includes/proto/index.js")]: [
                "ZilliqaMessage",
              ],
            },
          }),
          globals(),
          json(),
          typescript2({
            tsconfig: path.join(pkg.path, "tsconfig.json"),
            typescript: ts, // ensure we're using the same typescript (3.x) for rollup as for regular builds etc
            tsconfigOverride: {
              module: "esnext",
              stripInternal: true,
              emitDeclarationOnly: false,
              composite: false,
              declaration: false,
              declarationMap: false,
              sourceMap: true,
            },
          }),
        ],
        // mark all packages that are not *this* package as external so they don't get included in the bundle
        external: getKeys(pkg.name),
        // external: project.packages
        //   .filter((p) => p.name !== pkg.name)
        //   .map((p) => p.scopedName)
        //   .concat(['cross-fetch']),
      });

      // 'amd' | 'cjs' | 'system' | 'es' | 'esm' | 'iife' | 'umd'
      if (outputs.indexOf("esm") === -1) {
        logBundle(`${logPrefix} skipping esm`);
      } else {
        logBundle(`${logPrefix} writing esm - ${pkg.esm}`);

        await bundle.write({
          file: pkg.esm,
          name: pkg.globalName,
          format: "esm",
          sourcemap: true,
        });
      }

      if (outputs.indexOf("umd") === -1) {
        logBundle(`${logPrefix} skipping umd`);
      } else {
        logBundle(`${logPrefix} writing umd - ${pkg.umd}`);

        await bundle.write({
          file: pkg.umd,
          exports: "named",
          name: pkg.globalName,
          globals: {
            ...getKeys(pkg.name).reduce((g, packages) => {
              if (packages === pkg.name) {
                g[pkg.scopedName] = pkg.globalName;
              } else {
                g[packages] = packages;
              }
              return g;
            }, {}),
          },
          format: "umd",
          sourcemap: true,
        });
      }
    }
  } catch (err) {
    logBundle("Failed to bundle:");
    logBundle(err);
    process.exit(1);
  }
}

bundle();