#!/usr/bin/env node

"use strict";

const spinners = require("./spinners.json");
const fs = require("fs");
const path = require("path");

const specsFile = path.resolve(__filename, "../../src/Spin/Specs.hs");

const entries = Object.entries(spinners);

const lines = [
  "-- | This module contains specs for a number of default spinning indicators.",
  "-- This file has been auto-generated using scripts/codegen. The specs",
  "-- themselves have been copied from github.com/sindresorhus/cli-spinners.",
  "module Spin.Specs",
  ...(entries.length > 0
    ? [
        `  ( ${entries[0][0]}Spec`,
        ...entries.slice(1).map(([name]) => `  , ${name}Spec`)
      ]
    : ["  ("]),
  "  ) where",
  "",
  "import Spin.Types",
  "",
  ...entries.flatMap(([name, { interval, frames }]) => [
    `-- | Spec for ${name} spinning indicator:`,
    ...frames.map(frame => `-- ${frame}`),
    `${name}Spec :: Spec`,
    `${name}Spec = Spec`,
    `  { specName = ${JSON.stringify(name)}`,
    `  , specInterval = ${String(interval)}`,
    ...(frames.length > 0
      ? [
          "  , specFrames =",
          `    [ ${JSON.stringify(frames[0])}`,
          ...frames
            .slice(1)
            .map((frame, i) => `    , ${JSON.stringify(frame)}`),
          "    ]"
        ]
      : ["  , specFrames = []"]),
    "  }",
    ""
  ])
];

fs.writeFileSync(specsFile, lines.join("\n"));