import path from "node:path";
import { existsSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { defineConfig } from "rolldown";

const here = path.dirname(fileURLToPath(import.meta.url));
const repoRoot = path.resolve(here, "../../../../..");
const fromHere = (p) => path.resolve(here, p);
const outputFile = path.resolve(
  here,
  "../../../../..",
  "src",
  "canvas-host",
  "a2ui",
  "a2ui.bundle.js",
);

const a2uiLitDist = path.resolve(repoRoot, "vendor/a2ui/renderers/lit/dist/src");
const a2uiThemeContext = path.resolve(a2uiLitDist, "0.8/ui/context/theme.js");
const a2uiNodeModules = path.resolve(repoRoot, "ui/node_modules");
const rootNodeModules = path.resolve(repoRoot, "node_modules");

const resolveA2uiDep = (pkg, rel = "") => {
  const uiPath = path.resolve(a2uiNodeModules, pkg, rel);
  if (existsSync(uiPath)) {
    return uiPath;
  }

  return path.resolve(rootNodeModules, pkg, rel);
};

export default defineConfig({
  input: fromHere("bootstrap.js"),
  experimental: {
    attachDebugInfo: "none",
  },
  treeshake: false,
  resolve: {
    alias: {
      "@a2ui/lit": path.resolve(a2uiLitDist, "index.js"),
      "@a2ui/lit/ui": path.resolve(a2uiLitDist, "0.8/ui/ui.js"),
      "@openclaw/a2ui-theme-context": a2uiThemeContext,
      "@lit/context": resolveA2uiDep("@lit/context", "index.js"),
      "@lit/context/": resolveA2uiDep("@lit/context"),
      "@lit-labs/signals": resolveA2uiDep("@lit-labs/signals", "index.js"),
      "@lit-labs/signals/": resolveA2uiDep("@lit-labs/signals"),
      lit: resolveA2uiDep("lit", "index.js"),
      "lit/": resolveA2uiDep("lit"),
      "signal-utils/": resolveA2uiDep("signal-utils"),
    },
  },
  output: {
    file: outputFile,
    format: "esm",
    codeSplitting: false,
    sourcemap: false,
  },
});