import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";
import { defineConfig } from "vite";
import react from "@vitejs/plugin-react";

const CONFIG_DIR = path.dirname(fileURLToPath(import.meta.url));
const APPLICATION_CONFIG_PATH = path.resolve(CONFIG_DIR, "../backend/src/main/resources/application.yml");

function resolveAppVersion(): string {
  const lines = fs.readFileSync(APPLICATION_CONFIG_PATH, "utf8").split(/\r?\n/);
  let inMuhSection = false;
  let inAppSection = false;

  for (const line of lines) {
    const trimmedLine = line.trim();
    if (!trimmedLine || trimmedLine.startsWith("#")) {
      continue;
    }

    const indentation = line.length - line.trimStart().length;

    if (indentation === 0) {
      inMuhSection = trimmedLine === "muh:";
      inAppSection = false;
      continue;
    }

    if (inMuhSection && indentation === 2) {
      inAppSection = trimmedLine === "app:";
      continue;
    }

    if (inMuhSection && inAppSection && indentation === 4 && trimmedLine.startsWith("version:")) {
      const version = trimmedLine.slice("version:".length).trim().replace(/^['"]|['"]$/g, "");
      if (/^\d+\.\d+\.\d+$/.test(version)) {
        return version;
      }
      throw new Error(`Ungueltige Versionsnummer in ${APPLICATION_CONFIG_PATH}: ${version}`);
    }
  }

  throw new Error(`muh.app.version konnte nicht aus ${APPLICATION_CONFIG_PATH} ermittelt werden.`);
}

export default defineConfig({
  plugins: [react()],
  define: {
    __APP_VERSION__: JSON.stringify(resolveAppVersion()),
  },
  server: {
    port: 5173,
    host: "0.0.0.0",
  },
});