#!/usr/bin/env node
// Non-functional change to trigger release workflow

import { existsSync, mkdirSync, createWriteStream, chmodSync, readFileSync, readSync, writeFileSync, unlinkSync, statSync, openSync, closeSync, copyFileSync, fsyncSync, renameSync, realpathSync } from 'fs';
import { join, dirname } from 'path';
import { fileURLToPath } from 'url';
import { get } from 'https';
import { platform, arch, tmpdir } from 'os';
import { execSync } from 'child_process';
import { createRequire } from 'module';

const __dirname = dirname(fileURLToPath(import.meta.url));

// Map Node.js platform/arch to Rust target triples
function getTargetTriple() {
  const platformMap = {
    'darwin': 'apple-darwin',
    'linux': 'unknown-linux-musl',  // Default to musl for better compatibility
    'win32': 'pc-windows-msvc'
  };
  
  const archMap = {
    'x64': 'x86_64',
    'arm64': 'aarch64'
  };
  
  const rustArch = archMap[arch()] || arch();
  const rustPlatform = platformMap[platform()] || platform();
  
  return `${rustArch}-${rustPlatform}`;
}

// Resolve a persistent user cache directory for binaries so that repeated
// npx installs can reuse a previously downloaded artifact and skip work.
function getCacheDir(version) {
  const plt = platform();
  const home = process.env.HOME || process.env.USERPROFILE || '';
  let base = '';
  if (plt === 'win32') {
    base = process.env.LOCALAPPDATA || join(home, 'AppData', 'Local');
  } else if (plt === 'darwin') {
    base = join(home, 'Library', 'Caches');
  } else {
    base = process.env.XDG_CACHE_HOME || join(home, '.cache');
  }
  const dir = join(base, 'hanzoai', 'dev', version);
  if (!existsSync(dir)) mkdirSync(dir, { recursive: true });
  return dir;
}

function getCachedBinaryPath(version, targetTriple, isWindows) {
  const ext = isWindows ? '.exe' : '';
  const cacheDir = getCacheDir(version);
  return join(cacheDir, `dev-${targetTriple}${ext}`);
}

// Substrings that appear only in shims we wrote ourselves. Used before removing
// or replacing a `code` on PATH, so a third party's `code` is never touched.
const SHIM_SIGNATURES = [
  '@hanzo/dev',
  '$(dirname "$0")/dev',
  '%~dp0dev'
];

function shimContentsLookOurs(contents) {
  return SHIM_SIGNATURES.some(sig => contents.includes(sig));
}

function looksLikeOurShim(path) {
  try {
    const contents = readFileSync(path, 'utf8');
    return shimContentsLookOurs(contents);
  } catch {
    return false;
  }
}

function isWSL() {
  if (platform() !== 'linux') return false;
  try {
    const ver = readFileSync('/proc/version', 'utf8').toLowerCase();
    return ver.includes('microsoft') || !!process.env.WSL_DISTRO_NAME;
  } catch { return false; }
}

function isPathOnWindowsFs(p) {
  try {
    const mounts = readFileSync('/proc/mounts', 'utf8').split(/\n/).filter(Boolean);
    let best = { mount: '/', type: 'unknown', len: 1 };
    for (const line of mounts) {
      const parts = line.split(' ');
      if (parts.length < 3) continue;
      const mnt = parts[1];
      const typ = parts[2];
      if (p.startsWith(mnt) && mnt.length > best.len) best = { mount: mnt, type: typ, len: mnt.length };
    }
    return best.type === 'drvfs' || best.type === 'cifs';
  } catch { return false; }
}

async function writeCacheAtomic(srcPath, cachePath) {
  try {
    if (existsSync(cachePath)) {
      const ok = validateDownloadedBinary(cachePath).ok;
      if (ok) return;
    }
  } catch {}
  const dir = dirname(cachePath);
  if (!existsSync(dir)) { try { mkdirSync(dir, { recursive: true }); } catch {} }
  const tmp = cachePath + '.tmp-' + Math.random().toString(36).slice(2, 8);
  copyFileSync(srcPath, tmp);
  try { const fd = openSync(tmp, 'r'); try { fsyncSync(fd); } finally { closeSync(fd); } } catch {}
  // Retry with exponential backoff up to ~1.6s total
  const delays = [100, 200, 400, 800, 1200, 1600];
  for (let i = 0; i < delays.length; i++) {
    try {
      if (existsSync(cachePath)) { try { unlinkSync(cachePath); } catch {} }
      renameSync(tmp, cachePath);
      return;
    } catch {
      await new Promise(r => setTimeout(r, delays[i]));
    }
  }
  if (existsSync(cachePath)) { try { unlinkSync(cachePath); } catch {} }
  renameSync(tmp, cachePath);
}

function resolveGlobalBinDir() {
  const plt = platform();
  const userAgent = process.env.npm_config_user_agent || '';

  const fromPrefix = (prefixPath) => {
    if (!prefixPath) return '';
    return plt === 'win32' ? prefixPath : join(prefixPath, 'bin');
  };

  const prefixEnv = process.env.npm_config_prefix || process.env.PREFIX || '';
  const direct = fromPrefix(prefixEnv);
  if (direct) return direct;

  const tryExec = (command) => {
    try {
      return execSync(command, {
        stdio: ['ignore', 'pipe', 'ignore'],
        shell: true,
      }).toString().trim();
    } catch {
      return '';
    }
  };

  const prefixFromNpm = fromPrefix(tryExec('npm prefix -g'));
  if (prefixFromNpm) return prefixFromNpm;

  const binFromNpm = tryExec('npm bin -g');
  if (binFromNpm) return binFromNpm;

  if (userAgent.includes('pnpm')) {
    const pnpmBin = tryExec('pnpm bin --global');
    if (pnpmBin) return pnpmBin;
    const pnpmPrefix = fromPrefix(tryExec('pnpm env get prefix'));
    if (pnpmPrefix) return pnpmPrefix;
  }

  if (userAgent.includes('yarn')) {
    const yarnBin = tryExec('yarn global bin');
    if (yarnBin) return yarnBin;
  }

  return '';
}

async function downloadBinary(url, dest, maxRedirects = 5, maxRetries = 3) {
  const sleep = (ms) => new Promise(r => setTimeout(r, ms));

  const doAttempt = () => new Promise((resolve, reject) => {
    const attempt = (currentUrl, redirectsLeft) => {
      const req = get(currentUrl, (response) => {
        const status = response.statusCode || 0;
        const location = response.headers.location;

        if ((status === 301 || status === 302 || status === 303 || status === 307 || status === 308) && location) {
          if (redirectsLeft <= 0) {
            reject(new Error(`Too many redirects while downloading ${currentUrl}`));
            return;
          }
          attempt(location, redirectsLeft - 1);
          return;
        }

        if (status === 200) {
          const expected = parseInt(response.headers['content-length'] || '0', 10) || 0;
          let bytes = 0;
          let timer;
          const timeoutMs = 30000; // 30s inactivity timeout

          const resetTimer = () => {
            if (timer) clearTimeout(timer);
            timer = setTimeout(() => {
              req.destroy(new Error('download stalled'));
            }, timeoutMs);
          };

          resetTimer();
          response.on('data', (chunk) => {
            bytes += chunk.length;
            resetTimer();
          });

          const file = createWriteStream(dest);
          response.pipe(file);
          file.on('finish', () => {
            if (timer) clearTimeout(timer);
            file.close();
            if (expected && bytes !== expected) {
              try { unlinkSync(dest); } catch {}
              reject(new Error(`incomplete download: got ${bytes} of ${expected} bytes`));
            } else if (bytes === 0) {
              try { unlinkSync(dest); } catch {}
              reject(new Error('empty download'));
            } else {
              resolve();
            }
          });
          file.on('error', (err) => {
            if (timer) clearTimeout(timer);
            try { unlinkSync(dest); } catch {}
            reject(err);
          });
        } else {
          reject(new Error(`Failed to download: HTTP ${status}`));
        }
      });

      req.on('error', (err) => {
        try { unlinkSync(dest); } catch {}
        reject(err);
      });

      // Absolute request timeout to avoid hanging forever
      req.setTimeout(120000, () => {
        req.destroy(new Error('download timed out'));
      });
    };

    attempt(url, maxRedirects);
  });

  let attemptNum = 0;
  while (true) {
    try {
      return await doAttempt();
    } catch (e) {
      attemptNum += 1;
      if (attemptNum > maxRetries) throw e;
      const backoff = Math.min(2000, 200 * attemptNum);
      await sleep(backoff);
    }
  }
}

function validateDownloadedBinary(p) {
  try {
    const st = statSync(p);
    if (!st.isFile() || st.size === 0) {
      return { ok: false, reason: 'empty or not a regular file' };
    }
    const fd = openSync(p, 'r');
    try {
      const buf = Buffer.alloc(4);
      const n = readSync(fd, buf, 0, 4, 0);
      if (n < 2) return { ok: false, reason: 'too short' };
      const plt = platform();
      if (plt === 'win32') {
        if (!(buf[0] === 0x4d && buf[1] === 0x5a)) return { ok: false, reason: 'invalid PE header (missing MZ)' };
      } else if (plt === 'linux' || plt === 'android') {
        if (!(buf[0] === 0x7f && buf[1] === 0x45 && buf[2] === 0x4c && buf[3] === 0x46)) return { ok: false, reason: 'invalid ELF header' };
      } else if (plt === 'darwin') {
        const isMachO = (buf[0] === 0xcf && buf[1] === 0xfa && buf[2] === 0xed && buf[3] === 0xfe) ||
                        (buf[0] === 0xca && buf[1] === 0xfe && buf[2] === 0xba && buf[3] === 0xbe);
        if (!isMachO) return { ok: false, reason: 'invalid Mach-O header' };
      }
      return { ok: true };
    } finally {
      closeSync(fd);
    }
  } catch (e) {
    return { ok: false, reason: e.message };
  }
}

async function main() {
  // Detect potential PATH conflict with an existing `code` command (e.g., VS Code)
  // Only relevant for global installs; skip for npx/local installs to keep postinstall fast.
  const ua = process.env.npm_config_user_agent || '';
  const isNpx = ua.includes('npx');
  const isGlobal = process.env.npm_config_global === 'true';
  if (isGlobal && !isNpx) {
    try {
      const whichCmd = process.platform === 'win32' ? 'where code' : 'command -v code || which code || true';
      const resolved = execSync(whichCmd, { stdio: ['ignore', 'pipe', 'ignore'], shell: process.platform !== 'win32' }).toString().split(/\r?\n/).filter(Boolean)[0];
      if (resolved) {
        let contents = '';
        try {
          contents = readFileSync(resolved, 'utf8');
        } catch {
          contents = '';
        }
        const looksLikeOurs = shimContentsLookOurs(contents);
        if (!looksLikeOurs) {
          console.warn('[notice] Found an existing `code` on PATH at:');
          console.warn(`         ${resolved}`);
          console.warn('[notice] We will still install our CLI, also available as `dev`.');
          console.warn('         If `code` runs another tool, prefer using: dev');
          console.warn('         Or run our CLI explicitly via: npx -y @hanzo/dev');
        }
      }
    } catch {
      // Ignore detection failures; proceed with install.
    }
  }

  const targetTriple = getTargetTriple();
  const isWindows = platform() === 'win32';
  const binaryExt = isWindows ? '.exe' : '';
  
  const binDir = join(__dirname, 'bin');
  if (!existsSync(binDir)) {
    mkdirSync(binDir, { recursive: true });
  }
  
  // Get package version - use readFileSync for compatibility
  const packageJson = JSON.parse(readFileSync(join(__dirname, 'package.json'), 'utf8'));
  const version = packageJson.version;
  
  // Download only the primary binary; we'll create wrappers for legacy names.
  const binaries = ['dev'];

  console.log(`Installing @hanzo/dev v${version} for ${targetTriple}...`);
  
  for (const binary of binaries) {
    const binaryName = `${binary}-${targetTriple}${binaryExt}`;
    const localPath = join(binDir, binaryName);
    const cachePath = getCachedBinaryPath(version, targetTriple, isWindows);
    
    // On Windows we avoid placing the executable inside node_modules to prevent
    // EBUSY/EPERM during global upgrades when the binary is in use.
    // We treat the user cache path as the canonical home of the native binary.
    // For macOS/Linux we keep previous behavior and also place a copy in binDir
    // for convenience.

    // Fast path: if a valid cached binary exists for this version+triple, reuse it.
    try {
      if (existsSync(cachePath)) {
        const valid = validateDownloadedBinary(cachePath);
        if (valid.ok) {
          // Avoid mirroring into node_modules on Windows or WSL-on-NTFS.
          const wsl = isWSL();
          const binDirReal = (() => { try { return realpathSync(binDir); } catch { return binDir; } })();
          const mirrorToLocal = !(isWindows || (wsl && isPathOnWindowsFs(binDirReal)));
          if (mirrorToLocal) {
            copyFileSync(cachePath, localPath);
            try { chmodSync(localPath, 0o755); } catch {}
          }
          console.log(`✓ ${binaryName} ready from user cache`);
          continue; // next binary
        }
      }
    } catch {
      // Ignore cache errors and fall through to normal paths
    }
    
    // First try platform package via npm optionalDependencies (fast path on npm CDN).
    const require = createRequire(import.meta.url);
    const platformPkg = (() => {
      const name = (() => {
        if (isWindows) return '@hanzo/dev-win32-x64';
        const plt = platform();
        const cpu = arch();
        if (plt === 'darwin' && cpu === 'arm64') return '@hanzo/dev-darwin-arm64';
        if (plt === 'darwin' && cpu === 'x64') return '@hanzo/dev-darwin-x64';
        if (plt === 'linux' && cpu === 'x64') return '@hanzo/dev-linux-x64-musl';
        if (plt === 'linux' && cpu === 'arm64') return '@hanzo/dev-linux-arm64-musl';
        return null;
      })();
      if (!name) return null;
      try {
        const pkgJsonPath = require.resolve(`${name}/package.json`);
        const pkgDir = dirname(pkgJsonPath);
        return { name, dir: pkgDir };
      } catch {
        return null;
      }
    })();

    if (platformPkg) {
      try {
        // Expect binary inside platform package bin directory
        const src = join(platformPkg.dir, 'bin', binaryName);
        if (!existsSync(src)) {
          throw new Error(`platform package missing binary: ${platformPkg.name}`);
        }
        // Populate cache first (canonical location) atomically
        await writeCacheAtomic(src, cachePath);
        // Mirror into local bin only on Unix-like filesystems (not Windows/WSL-on-NTFS)
        const wsl = isWSL();
        const binDirReal = (() => { try { return realpathSync(binDir); } catch { return binDir; } })();
        const mirrorToLocal = !(isWindows || (wsl && isPathOnWindowsFs(binDirReal)));
        if (mirrorToLocal) {
          copyFileSync(cachePath, localPath);
          try { chmodSync(localPath, 0o755); } catch {}
        }
        console.log(`✓ Installed ${binaryName} from ${platformPkg.name} (cached)`);
        continue; // next binary
      } catch (e) {
        console.warn(`⚠ Failed platform package install (${e.message}), falling back to GitHub download`);
      }
    }

    // Decide archive format per OS with fallback on macOS/Linux:
    // - Windows: .zip
    // - macOS/Linux: prefer .zst if `zstd` CLI is available; otherwise use .tar.gz
    const isWin = isWindows;
    const binDirReal = (() => { try { return realpathSync(binDir); } catch { return binDir; } })();
    const mirrorToLocal = !(isWin || (isWSL() && isPathOnWindowsFs(binDirReal)));
    let useZst = false;
    if (!isWin) {
      try {
        execSync('zstd --version', { stdio: 'ignore', shell: true });
        useZst = true;
      } catch {
        useZst = false;
      }
    }
    const archiveName = isWin ? `${binaryName}.zip` : (useZst ? `${binaryName}.zst` : `${binaryName}.tar.gz`);
    const downloadUrl = `https://github.com/hanzoai/dev/releases/download/v${version}/${archiveName}`;

    console.log(`Downloading ${archiveName}...`);
    try {
      const needsIsolation = isWin || (!isWin && !mirrorToLocal); // Windows or WSL-on-NTFS
      let safeTempDir = needsIsolation ? join(tmpdir(), 'hanzoai', 'dev', version) : binDir;
      // Ensure staging dir exists; if tmp fails (permissions/space), fall back to user cache.
      if (needsIsolation) {
        try {
          if (!existsSync(safeTempDir)) mkdirSync(safeTempDir, { recursive: true });
        } catch {
          try {
            safeTempDir = getCacheDir(version);
            if (!existsSync(safeTempDir)) mkdirSync(safeTempDir, { recursive: true });
          } catch {}
        }
      }
      const tmpPath = join(needsIsolation ? safeTempDir : binDir, `.${archiveName}.part`);
      await downloadBinary(downloadUrl, tmpPath);

      if (isWin) {
        // Unzip to a temp directory, then move into the per-user cache.
        const unzipDest = safeTempDir;
        try {
          const sysRoot = process.env.SystemRoot || process.env.windir || 'C:\\Windows';
          const psFull = join(sysRoot, 'System32', 'WindowsPowerShell', 'v1.0', 'powershell.exe');
          const psCmd = `Expand-Archive -Path '${tmpPath}' -DestinationPath '${unzipDest}' -Force`;
          let ok = false;
          // Attempt full-path powershell.exe
          try { execSync(`"${psFull}" -NoProfile -NonInteractive -Command "${psCmd}"`, { stdio: 'ignore' }); ok = true; } catch {}
          // Fallback to powershell in PATH
          if (!ok) { try { execSync(`powershell -NoProfile -NonInteractive -Command "${psCmd}"`, { stdio: 'ignore' }); ok = true; } catch {} }
          // Fallback to pwsh (PowerShell 7)
          if (!ok) { try { execSync(`pwsh -NoProfile -NonInteractive -Command "${psCmd}"`, { stdio: 'ignore' }); ok = true; } catch {} }
          // Final fallback: bsdtar can extract .zip
          if (!ok) { execSync(`tar -xf "${tmpPath}" -C "${unzipDest}"`, { stdio: 'ignore', shell: true }); }
        } catch (e) {
          throw new Error(`failed to unzip archive: ${e.message}`);
        } finally {
          try { unlinkSync(tmpPath); } catch {}
        }
        // Move the extracted file from temp to cache; do not leave a copy in node_modules
        try {
          const extractedPath = join(unzipDest, binaryName);
          await writeCacheAtomic(extractedPath, cachePath);
          try { unlinkSync(extractedPath); } catch {}
        } catch (e) {
          throw new Error(`failed to move binary to cache: ${e.message}`);
        }
      } else {
        if (useZst) {
          // Decompress .zst via system zstd
          try {
            const outPath = mirrorToLocal ? localPath : join(safeTempDir, binaryName);
            execSync(`zstd -d '${tmpPath}' -o '${outPath}'`, { stdio: 'ignore', shell: true });
          } catch (e) {
            try { unlinkSync(tmpPath); } catch {}
            throw new Error(`failed to decompress .zst (need zstd CLI): ${e.message}`);
          }
          try { unlinkSync(tmpPath); } catch {}
        } else {
          // Extract .tar.gz using system tar
          try {
            const dest = mirrorToLocal ? binDir : safeTempDir;
            execSync(`tar -xzf '${tmpPath}' -C '${dest}'`, { stdio: 'ignore', shell: true });
          } catch (e) {
            try { unlinkSync(tmpPath); } catch {}
            throw new Error(`failed to extract .tar.gz: ${e.message}`);
          }
          try { unlinkSync(tmpPath); } catch {}
        }
        if (!mirrorToLocal) {
          try {
            const extractedPath = join(safeTempDir, binaryName);
            await writeCacheAtomic(extractedPath, cachePath);
            try { unlinkSync(extractedPath); } catch {}
          } catch (e) {
            throw new Error(`failed to move binary to cache: ${e.message}`);
          }
        }
      }

      // Validate header to avoid corrupt binaries causing spawn EFTYPE/ENOEXEC

      const valid = validateDownloadedBinary(isWin ? cachePath : (mirrorToLocal ? localPath : cachePath));
      if (!valid.ok) {
        try { (isWin || !mirrorToLocal) ? unlinkSync(cachePath) : unlinkSync(localPath); } catch {}
        throw new Error(`invalid binary (${valid.reason})`);
      }

      // Make executable on Unix-like systems
      if (!isWin && mirrorToLocal) {
        chmodSync(localPath, 0o755);
      }
      
      console.log(`✓ Installed ${binaryName}${(isWin || !mirrorToLocal) ? ' (cached)' : ''}`);
      // Ensure persistent cache holds the binary (already true for Windows path)
      if (!isWin && mirrorToLocal) {
        try { await writeCacheAtomic(localPath, cachePath); } catch {}
      }
    } catch (error) {
      console.error(`✗ Failed to install ${binaryName}: ${error.message}`);
      console.error(`  Downloaded from: ${downloadUrl}`);
      // Continue with other binaries even if one fails
    }
  }

  // Create platform-specific symlink/copy for main binary
  const mainBinary = `dev-${targetTriple}${binaryExt}`;
  const mainBinaryPath = join(binDir, mainBinary);
  
  if (existsSync(mainBinaryPath) || existsSync(getCachedBinaryPath(version, targetTriple, platform() === 'win32'))) {
    try {
      const probePath = existsSync(mainBinaryPath) ? mainBinaryPath : getCachedBinaryPath(version, targetTriple, platform() === 'win32');
      const stats = statSync(probePath);
      if (!stats.size) throw new Error('binary is empty (download likely failed)');
      const valid = validateDownloadedBinary(probePath);
      if (!valid.ok) {
        console.warn(`⚠ Main dev binary appears invalid: ${valid.reason}`);
        console.warn('  Try reinstalling or check your network/proxy settings.');
      }
    } catch (e) {
      console.warn(`⚠ Main dev binary appears invalid: ${e.message}`);
      console.warn('  Try reinstalling or check your network/proxy settings.');
    }
    console.log('Setting up main dev binary...');
    
    // On Windows, we can't use symlinks easily, so update the JS wrapper
    // On Unix, the JS wrapper will find the correct binary
    console.log('✓ Installation complete!');
  } else {
    console.warn('⚠ Main dev binary not found. You may need to build from source.');
  }

  // `dev` is the only bin in package.json, so the package manager always creates
  // it and every wrapper below forwards to it. `code` is an alias we create only
  // when nothing else owns that name on PATH, so we never hijack another CLI.
  // For upgrades from older versions that published a `code` bin, we also remove
  // our old shim if a conflict is detected.
  if (isGlobal && !isNpx) try {
    const isTTY = process.stdout && process.stdout.isTTY;
    const isWindows = platform() === 'win32';
    const ua = process.env.npm_config_user_agent || '';
    const isBun = ua.includes('bun') || !!process.env.BUN_INSTALL;

    const installedCmds = new Set(['dev']); // global install always exposes dev via package manager
    const skippedCmds = [];

    // Helper to resolve all 'code' on PATH
    const resolveAllOnPath = () => {
      try {
        if (isWindows) {
          const out = execSync('where code', { stdio: ['ignore', 'pipe', 'ignore'] }).toString();
          return out.split(/\r?\n/).map(s => s.trim()).filter(Boolean);
        }
        let out = '';
        try {
          out = execSync('bash -lc "which -a code 2>/dev/null"', { stdio: ['ignore', 'pipe', 'ignore'] }).toString();
        } catch {
          try {
            out = execSync('command -v code || true', { stdio: ['ignore', 'pipe', 'ignore'] }).toString();
          } catch { out = ''; }
        }
        return out.split(/\r?\n/).map(s => s.trim()).filter(Boolean);
      } catch {
        return [];
      }
    };

    if (isBun) {
      // Bun creates shims for every bin; if another 'code' exists elsewhere on PATH, remove Bun's shim
      let bunBin = '';
      try {
        const home = process.env.HOME || process.env.USERPROFILE || '';
        const bunBase = process.env.BUN_INSTALL || join(home, '.bun');
        bunBin = join(bunBase, 'bin');
      } catch {}

      const bunShim = join(bunBin || '', isWindows ? 'code.cmd' : 'code');
      const candidates = resolveAllOnPath();
      const other = candidates.find(p => p && (!bunBin || !p.startsWith(bunBin)));
      if (other && existsSync(bunShim)) {
        try {
          unlinkSync(bunShim);
          console.log(`✓ Skipped global 'code' shim under Bun (existing: ${other})`);
          skippedCmds.push({ name: 'code', reason: `existing: ${other}` });
        } catch (e) {
          console.log(`⚠ Could not remove Bun shim '${bunShim}': ${e.message}`);
        }
      } else if (!other) {
        // No conflict: create a wrapper that forwards to `dev`
        try {
          const wrapperPath = bunShim;
          if (isWindows) {
            const content = `@echo off\r\n"%~dp0dev" %*\r\n`;
            writeFileSync(wrapperPath, content);
          } else {
            const content = `#!/bin/sh\nexec "$(dirname \"$0\")/dev" "$@"\n`;
            writeFileSync(wrapperPath, content);
            chmodSync(wrapperPath, 0o755);
          }
          console.log("✓ Created 'code' wrapper -> dev (bun)");
          installedCmds.add('code');
        } catch (e) {
          console.log(`⚠ Failed to create 'code' wrapper (bun): ${e.message}`);
        }
      }

      // Print summary for Bun
      const list = Array.from(installedCmds).sort().join(', ');
      console.log(`Commands installed (bun): ${list}`);
      if (skippedCmds.length) {
        for (const s of skippedCmds) console.error(`Commands skipped: ${s.name} (${s.reason})`);
        console.error('→ Use `dev` to run this tool.');
      }
      // Final friendly usage hint
      if (installedCmds.has('code')) {
        console.log("Use 'code' to launch Hanzo Dev.");
      } else {
        console.log("Use 'dev' to launch Hanzo Dev.");
      }
    } else {
      // npm/pnpm/yarn path
      const globalBin = resolveGlobalBinDir();
      const ourShim = globalBin ? join(globalBin, isWindows ? 'code.cmd' : 'code') : '';
      const candidates = resolveAllOnPath();
      const others = candidates.filter(p => p && (!ourShim || p !== ourShim));
      const ourShimExists = ourShim && existsSync(ourShim);
      const shimLooksOurs = ourShimExists && looksLikeOurShim(ourShim);
      const conflictPaths = [
        ...others,
        ...(ourShimExists && !shimLooksOurs ? [ourShim] : []),
      ];
      const collision = conflictPaths.length > 0;

      const ensureWrapper = (name, args) => {
        if (!globalBin) return;
        try {
          const wrapperPath = join(globalBin, isWindows ? `${name}.cmd` : name);
          if (isWindows) {
            const content = `@echo off\r\n"%~dp0dev" ${args} %*\r\n`;
            writeFileSync(wrapperPath, content);
          } else {
            const content = `#!/bin/sh\nexec "$(dirname \"$0\")/dev" ${args} "$@"\n`;
            writeFileSync(wrapperPath, content);
            chmodSync(wrapperPath, 0o755);
          }
          console.log(`✓ Created wrapper '${name}' -> dev ${args}`);
          installedCmds.add(name);
        } catch (e) {
          console.log(`⚠ Failed to create '${name}' wrapper: ${e.message}`);
        }
      };

      // Always create legacy wrappers so existing scripts keep working.
      // These are distinct commands and keep their own names; only their target
      // changed from `code` to `dev`.
      ensureWrapper('code-tui', '');
      ensureWrapper('code-exec', 'exec');

      if (collision) {
        console.error('⚠ Detected existing `code` on PATH:');
        for (const p of conflictPaths) console.error(`   - ${p}`);
        if (globalBin) {
          try {
            if (ourShimExists) {
              if (shimLooksOurs && others.length > 0) {
                unlinkSync(ourShim);
                console.error(`✓ Removed global 'code' shim (ours) at ${ourShim}`);
                const reason = others[0] || ourShim;
                skippedCmds.push({ name: 'code', reason: `existing: ${reason}` });
              } else if (!shimLooksOurs) {
                console.error(`✓ Skipped global 'code' shim (different CLI at ${ourShim})`);
                const reason = conflictPaths[0] || ourShim;
                skippedCmds.push({ name: 'code', reason: `existing: ${reason}` });
              }
            } else {
              const reason = conflictPaths[0] || 'another command on PATH';
              skippedCmds.push({ name: 'code', reason: `existing: ${reason}` });
            }
          } catch (e) {
            console.error(`⚠ Could not remove npm shim '${ourShim}': ${e.message}`);
          }
          console.error('→ Use `dev` to run this tool.');
        } else {
          console.log('Note: could not determine npm global bin; skipping alias creation.');
        }
      } else {
        // No collision; ensure a 'code' wrapper exists forwarding to 'dev'
        if (globalBin) {
          try {
            const content = isWindows
              ? `@echo off\r\n"%~dp0dev" %*\r\n`
              : `#!/bin/sh\nexec "$(dirname \"$0\")/dev" "$@"\n`;
            writeFileSync(ourShim, content);
            if (!isWindows) chmodSync(ourShim, 0o755);
            console.log("✓ Created 'code' wrapper -> dev");
            installedCmds.add('code');
          } catch (e) {
            console.log(`⚠ Failed to create 'code' wrapper: ${e.message}`);
          }
        }
      }

      // Print summary for npm/pnpm/yarn
      const list = Array.from(installedCmds).sort().join(', ');
      console.log(`Commands installed: ${list}`);
      if (skippedCmds.length) {
        for (const s of skippedCmds) console.log(`Commands skipped: ${s.name} (${s.reason})`);
      }
      // Final friendly usage hint
      if (installedCmds.has('code')) {
        console.log("Use 'code' to launch Hanzo Dev.");
      } else {
        console.log("Use 'dev' to launch Hanzo Dev.");
      }
    }
  } catch {
    // non-fatal
  }
}

main().catch(error => {
  console.error('Installation failed:', error);
  process.exit(1);
});