import { execSync } from "node:child_process";
import { fileURLToPath, URL } from "node:url";

import tailwindcss from "@tailwindcss/vite";
import react from "@vitejs/plugin-react";
import { defineConfig } from "vite";

const backend = process.env.VITE_BACKEND ?? "http://127.0.0.1:8000";

/** Short commit hash baked into the bundle (e621 `_client` string). */
function gitHash(): string {
  const configured = process.env.GIT_HASH?.trim();
  if (configured) return configured;
  try {
    return execSync("git rev-parse --short HEAD", {
      cwd: fileURLToPath(new URL(".", import.meta.url)),
      stdio: ["ignore", "pipe", "ignore"],
    })
      .toString()
      .trim();
  } catch {
    return "dev";
  }
}

// https://vite.dev/config/
export default defineConfig({
  plugins: [react(), tailwindcss()],
  define: {
    __GIT_HASH__: JSON.stringify(gitHash()),
  },
  resolve: {
    alias: {
      "@": fileURLToPath(new URL("./src", import.meta.url)),
    },
  },
  server: {
    proxy: {
      "/api": backend,
      "/media": backend,
      "/admin": backend,
    },
  },
});