#!/usr/bin/env -S deno run -A

import * as path from "std/path";
import * as sass from "sass";
import * as rp from "npm:@rose-pine/palette";

type Flavor = "main" | "moon" | "dawn";

function isUpperCase(str: string) {
  return str !== str.toLowerCase() && str === str.toUpperCase();
}

const builder = (flavor: Flavor, accent: string) => `
${Object.keys(rp.roleColors)
  .map(
    (color) =>
      `$${color
        .split("")
        .map((c) => (isUpperCase(c) ? "-" + c.toLowerCase() : c))
        .join("")}: #${
        /* @ts-ignore I hate typescript */
        rp.roleColors[color][flavor].hex
      };`,
  )
  .join("\n")}

$accent: $${accent};
$isDark: ${flavor !== "dawn"};

@import "theme";
`;

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

const accents = ["love", "gold", "rose", "pine", "foam", "iris"];

Deno.mkdirSync(path.join(__dirname, "dist"), { recursive: true });

const flavors = Object.keys(rp.variantColors);
for (const flavor of flavors) {
  for (const accent of accents) {
    const input = builder(flavor as Flavor, accent);
    const result = sass.compileString(input, {
      loadPaths: [
        path.join(__dirname, "src"),
        path.join(__dirname, "node_modules"),
      ],
    });

    Deno.writeTextFileSync(
      path.join(__dirname, "dist", `theme-rose-pine-${flavor}-${accent}.css`),
      result.css,
    );
  }
}

// TODO:
// refactor this part out to a common import, since ctp/ctp & ctp/userstyles
// are both using the same base function
const updateReadme = ({
  readme,
  section,
  newContent,
}: {
  readme: string;
  section: string;
  newContent: string;
}): string => {
  const preamble =
    "<!-- the following section is auto-generated, do not edit -->";
  const startMarker = `<!-- AUTOGEN:${section.toUpperCase()} START -->`;
  const endMarker = `<!-- AUTOGEN:${section.toUpperCase()} END -->`;
  const wrapped = `${startMarker}\n${preamble}\n${newContent}\n${endMarker}`;

  if (!(readme.includes(startMarker) && readme.includes(endMarker))) {
    throw new Error("Markers not found in README.md");
  }

  const pre = readme.split(startMarker)[0];
  const end = readme.split(endMarker)[1];
  return pre + wrapped + end;
};

const readme = Deno.readTextFileSync(path.join(__dirname, "README.md"));
const newcontent = updateReadme({
  readme,
  section: "ini",
  newContent: `
\`\`\`
[ui]
THEMES = ${flavors
    .map((f) => accents.map((a) => `rose-pine-${f}-${a}`).join(","))
    .join(",")}
\`\`\`
`,
});

Deno.writeTextFileSync(path.join(__dirname, "README.md"), newcontent);