#!/usr/bin/env bun
/**
 * sync-deps.mjs - Merge submodule deps into consumer's package.json
 *
 * Usage: node atproto-presskit/scripts/sync-deps.mjs [--dry-run]
 *
 * Reads atproto-presskit/package.json, then for each dependency/devDependency
 * it adds (or version-bumps) the entry in the consumer's package.json.
 * Ensures patchedDependencies entry for sequoia-cli points at the
 * submodule's patch file.
 *
 * If --dry-run is passed, prints what would change without writing.
 */

import fs from "node:fs";
import path from "node:path";
import url from "node:url";

const __filename = url.fileURLToPath(new URL(import.meta.url));
const __dirname = path.dirname(__filename);

// Resolved paths relative to repo root
const rootDir = path.resolve(__dirname, "..");
const submodulePkgPath = path.join(rootDir, "package.json");
const consumerPkgPath = path.join(rootDir, "..", "package.json");
const patchesDir = path.join(rootDir, "patches");

console.log(`atproto-presskit root: ${rootDir}`);
console.log(`submodule package: ${submodulePkgPath}`);
console.log(`consumer package: ${consumerPkgPath}`);

// Check for --dry-run flag
const args = process.argv.slice(2);
const dryRun = args.includes("--dry-run");
if (dryRun) {
  console.log("Dry-run mode: no changes will be written");
}

// Read submodule package.json
const submodulePkg = JSON.parse(fs.readFileSync(submodulePkgPath, "utf8"));
console.log(`Found submodule package: ${submodulePkg.name}@${submodulePkg.version}`);

// Dependencies to merge
const depsToSync = {
  dependencies: submodulePkg.dependencies || {},
  devDependencies: submodulePkg.devDependencies || {},
};

// Check for sequoia-cli patch
const sequoiaPatchPath = path.join(patchesDir, "sequoia-cli@0.5.6.patch");
const hasPatch = fs.existsSync(sequoiaPatchPath);
if (hasPatch) {
  console.log(`Found sequoia-cli patch: ${sequoiaPatchPath}`);
} else {
  console.log("Warning: sequoia-cli patch not found at expected location");
}

// Read consumer package.json
let consumerPkg;
try {
  consumerPkg = JSON.parse(fs.readFileSync(consumerPkgPath, "utf8"));
} catch (err) {
  console.error(`Error reading consumer package: ${err.message}`);
  process.exit(1);
}

// Track changes
const changes = {
  added: /** @type {string[]} */ ([]),
  updated: /** @type {string[]} */ ([]),
};

// Merge dependencies and devDependencies
/** @param {"dependencies"|"devDependencies"} section */
function mergeDeps(section) {
  const source = depsToSync[section];
  const target = consumerPkg[section] || {};

  for (const [name, version] of Object.entries(source)) {
    const current = target[name];
    if (!current) {
      target[name] = version;
      changes.added.push(name + "@" + version);
    } else if (current !== version) {
      console.log("  Updating " + name + ": " + current + " -> " + version);
      target[name] = version;
      changes.updated.push(name + "@" + version);
    } else {
      console.log("  Keeping " + name + "@" + current);
    }
  }

  consumerPkg[section] = target;
}

console.log("\nMerging dependencies:");
mergeDeps("dependencies");

console.log("\nMerging devDependencies:");
mergeDeps("devDependencies");

// Update patchedDependencies if sequoia patch exists
if (hasPatch) {
  if (!consumerPkg.patchedDependencies) {
    consumerPkg.patchedDependencies = {};
  }
  // Path is relative to consumer (two dirs up from submodule)
  const patchRef = "atproto-presskit/patches/sequoia-cli@0.5.6.patch";
  if (consumerPkg.patchedDependencies["sequoia-cli@0.5.6"] !== patchRef) {
    console.log(`  Setting patchedDependencies["sequoia-cli@0.5.6"]: ${patchRef}`);
    consumerPkg.patchedDependencies["sequoia-cli@0.5.6"] = patchRef;
  }
}

// Write changes if not dry-run
if (!dryRun) {
  fs.writeFileSync(consumerPkgPath, JSON.stringify(consumerPkg, null, 2) + "\n");
  console.log(`\nWrote consumer package: ${consumerPkgPath}`);
} else {
  console.log("\nDry-run complete. No changes written.");
}

// Print summary
console.log("\n=== Summary ===");
console.log(`Added: ${changes.added.length} dependency/dep`);
console.log(`Updated: ${changes.updated.length} dependency/dep`);
if (dryRun) {
  console.log("\nWould commit these changes (not actually committed):");
  console.log("  git add package.json");
  console.log('  git commit -m "sync-deps: merge atproto-presskit dependencies"');
}