import { defineConfig, HmrContext } from "vite";
import react from "@vitejs/plugin-react";
import vike from "vike/plugin";
import { resolve } from "path";
import { readFileSync, existsSync } from "fs";
import { execSync } from "child_process";
import { imagetools } from "vite-imagetools";
import tailwindcss from "@tailwindcss/vite";
const host = process.env.TAURI_DEV_HOST;

// Read version from workspace Cargo.toml
function getVersionFromCargoToml(): string {
  const cargoToml = readFileSync(resolve(__dirname, "../Cargo.toml"), "utf-8");
  const versionMatch = cargoToml.match(/^\[workspace\.package\][\s\S]*?^version\s*=\s*"(.+?)"$/m);
  if (!versionMatch) {
    throw new Error("Failed to find version in workspace Cargo.toml");
  }
  return versionMatch[1];
}

// Read git commit from .source-commit file or git command
function getGitCommit(): string {
  const sourceCommitPath = resolve(__dirname, "../.source-commit");
  if (existsSync(sourceCommitPath)) {
    return readFileSync(sourceCommitPath, "utf-8").trim();
  }

  // Fallback to git command for local development
  try {
    return execSync("git rev-parse HEAD", { encoding: "utf-8", cwd: resolve(__dirname, "..") }).trim();
  } catch {
    return "unknown";
  }
}

// Get current build time in UTC (ISO 8601 format)
function getBuildTime(): string {
  return new Date().toISOString();
}

const fullReloadAlways = {
  name: "full-reload-always",
  handleHotUpdate(context: HmrContext): void {
    context.server.ws.send({ type: "full-reload" });
  },
};

// https://vite.dev/config/
export default defineConfig(({ mode }) => ({
  base: process.env.GITHUB_PAGES === "true" ? "/borde.rs/" : "/",
  css: {
    transformer: "lightningcss",
  },
  plugins: [vike(), react(), imagetools(), fullReloadAlways, tailwindcss()],

  define: {
    __DESKTOP__: JSON.stringify(mode !== "browser"),
    __APP_VERSION__: JSON.stringify(getVersionFromCargoToml()),
    __GIT_COMMIT__: JSON.stringify(getGitCommit()),
    __BUILD_TIME__: JSON.stringify(getBuildTime()),
  },

  resolve: {
    alias: {
      "@": resolve(__dirname, "src"),
      "@wasm": resolve(__dirname, "pkg"),
    },
  },

  build: {
    outDir: mode === "browser" ? "dist/browser" : "dist",
    cssMinify: "lightningcss",
    rollupOptions: {
      output: {
        // manualChunks: (id) => {
        //   // console.log(id);
        //   if (id.includes("node_modules")) {
        //     // React core - always needed
        //     if (id.includes("react") || id.includes("react-dom")) {
        //       return "vendor-react";
        //     }
        //     // PixiJS - large rendering library
        //     if (id.includes("pixi")) {
        //       return "vendor-pixi";
        //     }
        //     // UI libraries - icons, scrollbars, animations
        //     if (id.includes("radix-ui") || id.includes("lucide-react") || id.includes("overlayscrollbars") || id.includes("motion")) {
        //       return "vendor-ui";
        //     }
        //     return "vendor-other";
        //   }
        // },
      },
    },
  },

  // Vite options tailored for Tauri development and only applied in `tauri dev` or `tauri build`
  //
  // 1. prevent Vite from obscuring rust errors
  clearScreen: false,
  // 2. tauri expects a fixed port, fail if that port is not available
  server: {
    // Browser mode uses port 1421, desktop mode uses port 1420
    port: mode === "browser" ? 1421 : 1420,
    strictPort: true,
    host: host || false,
    hmr: host
      ? {
          protocol: "ws",
          host,
          port: mode === "browser" ? 1422 : 1421,
        }
      : undefined,
    watch: {
      // 3. tell Vite to ignore watching `src-tauri`
      ignored: ["**/crates/borders-desktop/**"],
    },
    // Add headers for SharedArrayBuffer support in browser mode
    headers:
      mode === "browser"
        ? {
            "Cross-Origin-Opener-Policy": "same-origin",
            "Cross-Origin-Embedder-Policy": "require-corp",
          }
        : undefined,
  },
}));