# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

import json  # noqa: TID251
import re
import shutil
import subprocess
import sys
import time
import zipfile
from pathlib import Path
from typing import Any, Callable

import click
import semver
from jinja2 import Environment, FileSystemLoader
from superset_core.extensions.types import (
    ExtensionConfig,
    Manifest,
    ManifestBackend,
    ManifestFrontend,
)
from watchdog.events import FileSystemEventHandler
from watchdog.observers import Observer

from superset_extensions_cli.constants import MIN_NPM_VERSION
from superset_extensions_cli.exceptions import ExtensionNameError
from superset_extensions_cli.types import ExtensionNames
from superset_extensions_cli.utils import (
    generate_extension_names,
    get_module_federation_name,
    kebab_to_snake_case,
    read_json,
    read_toml,
    suggest_technical_name,
    validate_display_name,
    validate_publisher,
    validate_technical_name,
    write_json,
    write_toml,
)

REMOTE_ENTRY_REGEX = re.compile(r"^remoteEntry\..+\.js$")
FRONTEND_DIST_REGEX = re.compile(r"/frontend/dist")


def validate_npm() -> None:
    """Abort if `npm` is not on PATH."""
    if shutil.which("npm") is None:
        click.secho(
            "❌ npm is not installed or not on your PATH.",
            err=True,
            fg="red",
        )
        sys.exit(1)

    try:
        result = subprocess.run(  # noqa: S603
            ["npm", "-v"],  # noqa: S607
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            text=True,
        )
        if result.returncode != 0:
            click.secho(
                f"❌ Failed to run `npm -v`: {result.stderr.strip()}",
                err=True,
                fg="red",
            )
            sys.exit(1)

        npm_version = result.stdout.strip()
        if semver.compare(npm_version, MIN_NPM_VERSION) < 0:
            click.secho(
                f"❌ npm version {npm_version} is lower than the required {MIN_NPM_VERSION}.",  # noqa: E501
                err=True,
                fg="red",
            )
            sys.exit(1)

    except FileNotFoundError:
        click.secho(
            "❌ npm was not found when checking its version.",
            err=True,
            fg="red",
        )
        sys.exit(1)


def init_frontend_deps(frontend_dir: Path) -> None:
    """
    If node_modules is missing under `frontend_dir`, run `npm ci` if package-lock.json
    exists, otherwise run `npm i`.
    """
    node_modules = frontend_dir / "node_modules"
    if not node_modules.exists():
        package_lock = frontend_dir / "package-lock.json"
        if package_lock.exists():
            click.secho("⚙️  node_modules not found, running `npm ci`…", fg="cyan")
            npm_command = ["npm", "ci"]
            error_msg = "❌ `npm ci` failed. Aborting."
        else:
            click.secho("⚙️  node_modules not found, running `npm i`…", fg="cyan")
            npm_command = ["npm", "i"]
            error_msg = "❌ `npm i` failed. Aborting."

        validate_npm()
        res = subprocess.run(  # noqa: S603
            npm_command,  # noqa: S607
            cwd=frontend_dir,
            text=True,
        )
        if res.returncode != 0:
            click.secho(error_msg, err=True, fg="red")
            sys.exit(1)
        click.secho("✅ Dependencies installed", fg="green")


def clean_dist(cwd: Path) -> None:
    dist_dir = cwd / "dist"
    if dist_dir.exists():
        shutil.rmtree(dist_dir)
    dist_dir.mkdir(parents=True)


def clean_dist_frontend(cwd: Path) -> None:
    frontend_dist = cwd / "dist" / "frontend"
    if frontend_dist.exists():
        shutil.rmtree(frontend_dist)


def build_manifest(cwd: Path, remote_entry: str | None) -> Manifest:
    extension_data = read_json(cwd / "extension.json")
    if not extension_data:
        click.secho("❌ extension.json not found.", err=True, fg="red")
        sys.exit(1)

    extension = ExtensionConfig.model_validate(extension_data)

    # Generate composite ID from publisher and name
    composite_id = f"{extension.publisher}.{extension.name}"

    frontend: ManifestFrontend | None = None
    if remote_entry:
        frontend = ManifestFrontend(
            remoteEntry=remote_entry,
            moduleFederationName=get_module_federation_name(
                extension.publisher, extension.name
            ),
        )

    backend: ManifestBackend | None = None
    backend_dir = cwd / "backend"
    if backend_dir.exists():
        # Generate conventional entry point
        publisher_snake = kebab_to_snake_case(extension.publisher)
        name_snake = kebab_to_snake_case(extension.name)
        entrypoint = f"{publisher_snake}.{name_snake}.entrypoint"
        backend = ManifestBackend(entrypoint=entrypoint)

    return Manifest(
        id=composite_id,
        publisher=extension.publisher,
        name=extension.name,
        displayName=extension.displayName,
        version=extension.version,
        permissions=extension.permissions,
        dependencies=extension.dependencies,
        frontend=frontend,
        backend=backend,
    )


def write_manifest(cwd: Path, manifest: Manifest) -> None:
    dist_dir = cwd / "dist"
    (dist_dir / "manifest.json").write_text(
        manifest.model_dump_json(indent=2, exclude_none=True, by_alias=True)
    )
    click.secho("✅ Manifest updated", fg="green")


def run_frontend_build(frontend_dir: Path) -> subprocess.CompletedProcess[str]:
    click.echo()
    click.secho("⚙️  Building frontend assets…", fg="cyan")
    return subprocess.run(  # noqa: S603
        ["npm", "run", "build"],  # noqa: S607
        cwd=frontend_dir,
        text=True,
    )


def copy_frontend_dist(cwd: Path) -> str:
    dist_dir = cwd / "dist"
    frontend_dist = cwd / "frontend" / "dist"
    remote_entry: str | None = None

    for f in frontend_dist.rglob("*"):
        if not f.is_file():
            continue
        if REMOTE_ENTRY_REGEX.match(f.name):
            remote_entry = f.name
        tgt = dist_dir / f.relative_to(cwd)
        tgt.parent.mkdir(parents=True, exist_ok=True)
        shutil.copy2(f, tgt)

    if not remote_entry:
        click.secho("❌ No remote entry file found.", err=True, fg="red")
        sys.exit(1)
    return remote_entry


def copy_backend_files(cwd: Path) -> None:
    """Copy backend files based on pyproject.toml build configuration (validation already passed)."""
    dist_dir = cwd / "dist"
    backend_dir = cwd / "backend"

    # Read build config from pyproject.toml
    pyproject = read_toml(backend_dir / "pyproject.toml")
    assert pyproject
    build_config = (
        pyproject.get("tool", {}).get("apache_superset_extensions", {}).get("build", {})
    )
    include_patterns = build_config.get("include", [])
    exclude_patterns = build_config.get("exclude", [])

    # Process include patterns
    for pattern in include_patterns:
        for f in backend_dir.glob(pattern):
            if not f.is_file():
                continue

            # Check exclude patterns
            relative_path = f.relative_to(backend_dir)
            should_exclude = any(
                relative_path.match(excl_pattern) for excl_pattern in exclude_patterns
            )
            if should_exclude:
                continue

            tgt = dist_dir / "backend" / relative_path
            tgt.parent.mkdir(parents=True, exist_ok=True)
            shutil.copy2(f, tgt)


def rebuild_frontend(cwd: Path, frontend_dir: Path) -> str | None:
    """Clean and rebuild frontend, return the remoteEntry filename."""
    clean_dist_frontend(cwd)

    res = run_frontend_build(frontend_dir)
    if res.returncode != 0:
        click.secho("❌ Frontend build failed", fg="red")
        return None

    remote_entry = copy_frontend_dist(cwd)
    click.secho("✅ Frontend rebuilt", fg="green")
    return remote_entry


def rebuild_backend(cwd: Path) -> None:
    """Copy backend files (no manifest update)."""
    copy_backend_files(cwd)
    click.secho("✅ Backend files synced", fg="green")


class FrontendChangeHandler(FileSystemEventHandler):
    def __init__(self, trigger_build: Callable[[], None]):
        self.trigger_build = trigger_build

    def on_any_event(self, event: Any) -> None:
        if FRONTEND_DIST_REGEX.search(event.src_path):
            return
        click.secho(f"🔁 Frontend change detected: {event.src_path}", fg="yellow")
        self.trigger_build()


@click.group(help="CLI for validating and bundling Superset extensions.")
def app() -> None:
    pass


@app.command()
def validate() -> None:
    """Validate the extension structure and metadata consistency."""
    validate_npm()

    cwd = Path.cwd()

    # Validate extension.json exists and is valid
    extension_data = read_json(cwd / "extension.json")
    if not extension_data:
        click.secho("❌ extension.json not found.", err=True, fg="red")
        sys.exit(1)

    try:
        extension = ExtensionConfig.model_validate(extension_data)
    except Exception as e:
        click.secho(f"❌ Invalid extension.json: {e}", err=True, fg="red")
        sys.exit(1)

    # Validate conventional backend structure if backend directory exists
    backend_dir = cwd / "backend"
    if backend_dir.exists():
        # Check for pyproject.toml
        pyproject_path = backend_dir / "pyproject.toml"
        if not pyproject_path.exists():
            click.secho(
                "❌ Backend directory exists but pyproject.toml not found",
                err=True,
                fg="red",
            )
            sys.exit(1)

        # Validate pyproject.toml has build configuration
        pyproject = read_toml(pyproject_path)
        if not pyproject:
            click.secho("❌ Failed to read backend pyproject.toml", err=True, fg="red")
            sys.exit(1)

        build_config = (
            pyproject.get("tool", {})
            .get("apache_superset_extensions", {})
            .get("build", {})
        )
        if not build_config.get("include"):
            click.secho(
                "❌ Missing [tool.apache_superset_extensions.build] section with 'include' patterns in pyproject.toml",
                err=True,
                fg="red",
            )
            sys.exit(1)

        # Check conventional backend entry point
        publisher_snake = kebab_to_snake_case(extension.publisher)
        name_snake = kebab_to_snake_case(extension.name)
        expected_entry_file = (
            backend_dir / "src" / publisher_snake / name_snake / "entrypoint.py"
        )

        if not expected_entry_file.exists():
            click.secho(
                f"❌ Backend entry point not found at expected location: {expected_entry_file.relative_to(cwd)}",
                err=True,
                fg="red",
            )
            click.secho(
                f"   Convention requires: backend/src/{publisher_snake}/{name_snake}/entrypoint.py",
                fg="yellow",
            )
            sys.exit(1)

    # Validate conventional frontend entry point if frontend directory exists
    frontend_dir = cwd / "frontend"
    if frontend_dir.exists():
        expected_frontend_entry = frontend_dir / "src" / "index.tsx"
        if not expected_frontend_entry.exists():
            click.secho(
                f"❌ Frontend entry point not found at expected location: {expected_frontend_entry.relative_to(cwd)}",
                err=True,
                fg="red",
            )
            click.secho("   Convention requires: frontend/src/index.tsx", fg="yellow")
            sys.exit(1)

    # Validate version and license consistency across extension.json, frontend, and backend
    mismatches: list[str] = []
    frontend_pkg_path = cwd / "frontend" / "package.json"
    frontend_pkg = None
    if frontend_pkg_path.is_file():
        frontend_pkg = read_json(frontend_pkg_path)
        if frontend_pkg:
            if frontend_pkg.get("version") != extension.version:
                mismatches.append(
                    f"  frontend/package.json version: {frontend_pkg.get('version')} "
                    f"(expected {extension.version})"
                )
            if extension.license and frontend_pkg.get("license") != extension.license:
                mismatches.append(
                    f"  frontend/package.json license: {frontend_pkg.get('license')} "
                    f"(expected {extension.license})"
                )

    backend_pyproject_path = cwd / "backend" / "pyproject.toml"
    if backend_pyproject_path.is_file():
        backend_pyproject = read_toml(backend_pyproject_path)
        if backend_pyproject:
            project = backend_pyproject.get("project", {})
            if project.get("version") != extension.version:
                mismatches.append(
                    f"  backend/pyproject.toml version: {project.get('version')} "
                    f"(expected {extension.version})"
                )
            if extension.license and project.get("license") != extension.license:
                mismatches.append(
                    f"  backend/pyproject.toml license: {project.get('license')} "
                    f"(expected {extension.license})"
                )

    if mismatches:
        click.secho("❌ Metadata mismatch detected:", err=True, fg="red")
        for mismatch in mismatches:
            click.secho(mismatch, err=True, fg="red")
        click.secho(
            "Run `superset-extensions update` to sync from extension.json.",
            fg="yellow",
        )
        sys.exit(1)

    click.secho("✅ Validation successful", fg="green")


@app.command()
@click.option(
    "--version",
    "version_opt",
    is_flag=False,
    flag_value="__prompt__",
    default=None,
    help="Set a new version. Prompts for value if none given.",
)
@click.option(
    "--license",
    "license_opt",
    is_flag=False,
    flag_value="__prompt__",
    default=None,
    help="Set a new license. Prompts for value if none given.",
)
def update(version_opt: str | None, license_opt: str | None) -> None:
    """Update derived and generated files in the extension project."""
    cwd = Path.cwd()

    extension_json_path = cwd / "extension.json"
    extension_data = read_json(extension_json_path)
    if not extension_data:
        click.secho("❌ extension.json not found.", err=True, fg="red")
        sys.exit(1)

    try:
        extension = ExtensionConfig.model_validate(extension_data)
    except Exception as e:
        click.secho(f"❌ Invalid extension.json: {e}", err=True, fg="red")
        sys.exit(1)

    # Resolve version: prompt if flag used without value
    if version_opt == "__prompt__":
        version_opt = click.prompt("Version", default=extension.version)
    target_version = (
        version_opt
        if version_opt and version_opt != extension.version
        else extension.version
    )

    # Resolve license: prompt if flag used without value
    if license_opt == "__prompt__":
        license_opt = click.prompt("License", default=extension.license or "")
    target_license = (
        license_opt
        if license_opt and license_opt != extension.license
        else extension.license
    )

    updated: list[str] = []

    # Update extension.json if version or license changed
    ext_changed = False
    if version_opt and version_opt != extension.version:
        extension_data["version"] = target_version
        ext_changed = True
    if license_opt and license_opt != extension.license:
        extension_data["license"] = target_license
        ext_changed = True
    if ext_changed:
        try:
            ExtensionConfig.model_validate(extension_data)
        except Exception as e:
            click.secho(f"❌ Invalid value: {e}", err=True, fg="red")
            sys.exit(1)
        write_json(extension_json_path, extension_data)
        updated.append("extension.json")

    # Update frontend/package.json
    frontend_pkg_path = cwd / "frontend" / "package.json"
    if frontend_pkg_path.is_file():
        frontend_pkg = read_json(frontend_pkg_path)
        if frontend_pkg:
            pkg_changed = False
            if frontend_pkg.get("version") != target_version:
                frontend_pkg["version"] = target_version
                pkg_changed = True
            if target_license and frontend_pkg.get("license") != target_license:
                frontend_pkg["license"] = target_license
                pkg_changed = True
            if pkg_changed:
                write_json(frontend_pkg_path, frontend_pkg)
                updated.append("frontend/package.json")

    # Update backend/pyproject.toml
    backend_pyproject_path = cwd / "backend" / "pyproject.toml"
    if backend_pyproject_path.is_file():
        backend_pyproject = read_toml(backend_pyproject_path)
        if backend_pyproject:
            project = backend_pyproject.setdefault("project", {})
            toml_changed = False
            if project.get("version") != target_version:
                project["version"] = target_version
                toml_changed = True
            if target_license and project.get("license") != target_license:
                project["license"] = target_license
                toml_changed = True
            if toml_changed:
                write_toml(backend_pyproject_path, backend_pyproject)
                updated.append("backend/pyproject.toml")

    if updated:
        for path in updated:
            click.secho(f"✅ Updated {path}", fg="green")
    else:
        click.secho("✅ All files already up to date.", fg="green")


@app.command()
@click.pass_context
def build(ctx: click.Context) -> None:
    """Build extension assets."""
    ctx.invoke(validate)
    cwd = Path.cwd()
    frontend_dir = cwd / "frontend"
    backend_dir = cwd / "backend"

    clean_dist(cwd)

    # Build frontend if it exists
    remote_entry = None
    if frontend_dir.exists():
        init_frontend_deps(frontend_dir)
        remote_entry = rebuild_frontend(cwd, frontend_dir)

    # Build backend independently if it exists
    if backend_dir.exists():
        pyproject = read_toml(backend_dir / "pyproject.toml")
        if pyproject:
            rebuild_backend(cwd)

    # Build manifest and write it
    manifest = build_manifest(cwd, remote_entry)
    write_manifest(cwd, manifest)

    click.secho("✅ Full build completed in dist/", fg="green")


@app.command()
@click.option(
    "--output",
    "-o",
    type=click.Path(path_type=Path, dir_okay=True, file_okay=True, writable=True),
    help="Optional output path or filename for the bundle.",
)
@click.pass_context
def bundle(ctx: click.Context, output: Path | None) -> None:
    """Package the extension into a .supx file."""
    ctx.invoke(build)

    cwd = Path.cwd()
    dist_dir = cwd / "dist"
    manifest_path = dist_dir / "manifest.json"

    if not manifest_path.exists():
        click.secho(
            "❌ dist/manifest.json not found. Run `build` first.", err=True, fg="red"
        )
        sys.exit(1)

    manifest = json.loads(manifest_path.read_text())
    name = manifest["name"]
    version = manifest["version"]
    default_filename = f"{name}-{version}.supx"

    if output is None:
        zip_path = Path(default_filename)
    elif output.is_dir():
        zip_path = output / default_filename
    else:
        zip_path = output

    try:
        with zipfile.ZipFile(zip_path, "w", zipfile.ZIP_DEFLATED) as zipf:
            for file in dist_dir.rglob("*"):
                if file.is_file():
                    arcname = file.relative_to(dist_dir)
                    zipf.write(file, arcname)
    except Exception as ex:
        click.secho(f"❌ Failed to create bundle: {ex}", err=True, fg="red")
        sys.exit(1)

    click.secho(f"✅ Bundle created: {zip_path}", fg="green")


@app.command()
@click.pass_context
def dev(ctx: click.Context) -> None:
    """Automatically rebuild the extension as files change."""
    cwd = Path.cwd()
    frontend_dir = cwd / "frontend"
    backend_dir = cwd / "backend"

    clean_dist(cwd)

    # Build frontend if it exists
    remote_entry = None
    if frontend_dir.exists():
        init_frontend_deps(frontend_dir)
        remote_entry = rebuild_frontend(cwd, frontend_dir)

    # Build backend if it exists
    if backend_dir.exists():
        rebuild_backend(cwd)

    manifest = build_manifest(cwd, remote_entry)
    write_manifest(cwd, manifest)

    def frontend_watcher() -> None:
        if frontend_dir.exists():
            if (remote_entry := rebuild_frontend(cwd, frontend_dir)) is not None:
                manifest = build_manifest(cwd, remote_entry)
                write_manifest(cwd, manifest)

    def backend_watcher() -> None:
        if backend_dir.exists():
            rebuild_backend(cwd)

    # Build watch message based on existing directories
    watch_dirs = []
    if frontend_dir.exists():
        watch_dirs.append(str(frontend_dir))
    if backend_dir.exists():
        watch_dirs.append(str(backend_dir))

    if watch_dirs:
        click.secho(f"👀 Watching for changes in: {', '.join(watch_dirs)}", fg="green")
    else:
        click.secho("⚠️  No frontend or backend directories found to watch", fg="yellow")

    observer = Observer()

    # Only set up watchers for directories that exist
    if frontend_dir.exists():
        frontend_handler = FrontendChangeHandler(trigger_build=frontend_watcher)
        observer.schedule(frontend_handler, str(frontend_dir), recursive=True)

    if backend_dir.exists():
        backend_handler = FileSystemEventHandler()
        backend_handler.on_any_event = lambda event: backend_watcher()
        observer.schedule(backend_handler, str(backend_dir), recursive=True)

    if watch_dirs:
        observer.start()

        try:
            while True:
                time.sleep(1)
        except KeyboardInterrupt:
            click.secho("\n🛑 Stopping watch mode", fg="blue")
            observer.stop()

        observer.join()
    else:
        click.secho("❌ No directories to watch. Exiting.", fg="red")


def prompt_for_extension_info(
    display_name_opt: str | None,
    publisher_opt: str | None,
    technical_name_opt: str | None,
) -> ExtensionNames:
    """
    Prompt for extension info with graceful validation and re-prompting.

    Args:
        display_name_opt: Display name provided via CLI option (if any)
        publisher_opt: Publisher provided via CLI option (if any)
        technical_name_opt: Technical name provided via CLI option (if any)

    Returns:
        ExtensionNames: Validated extension name variants
    """

    # Step 1: Get display name
    if display_name_opt:
        display_name = display_name_opt
        try:
            display_name = validate_display_name(display_name)
        except ExtensionNameError as e:
            click.secho(f"❌ {e}", fg="red")
            sys.exit(1)
    else:
        while True:
            display_name = click.prompt("Extension display name", type=str)
            try:
                display_name = validate_display_name(display_name)
                break
            except ExtensionNameError as e:
                click.secho(f"❌ {e}", fg="red")

    # Step 2: Get technical name (with suggestion from display name)
    if technical_name_opt:
        technical_name = technical_name_opt
        try:
            validate_technical_name(technical_name)
        except ExtensionNameError as e:
            click.secho(f"❌ {e}", fg="red")
            sys.exit(1)
    else:
        # Suggest technical name from display name
        try:
            suggested_technical = suggest_technical_name(display_name)
        except ExtensionNameError:
            suggested_technical = "extension"

        while True:
            technical_name = click.prompt(
                f"Extension name ({suggested_technical})",
                default=suggested_technical,
                type=str,
            )
            try:
                validate_technical_name(technical_name)
                break
            except ExtensionNameError as e:
                click.secho(f"❌ {e}", fg="red")

    # Step 3: Get publisher
    if publisher_opt:
        publisher = publisher_opt
        try:
            validate_publisher(publisher)
        except ExtensionNameError as e:
            click.secho(f"❌ {e}", fg="red")
            sys.exit(1)
    else:
        while True:
            publisher = click.prompt("Publisher (e.g., my-org)", type=str)
            try:
                validate_publisher(publisher)
                break
            except ExtensionNameError as e:
                click.secho(f"❌ {e}", fg="red")

    # Generate all name variants
    try:
        return generate_extension_names(display_name, publisher, technical_name)
    except ExtensionNameError as e:
        click.secho(f"❌ {e}", fg="red")
        sys.exit(1)


@app.command()
@click.option(
    "--publisher",
    "publisher_opt",
    default=None,
    help="Publisher namespace (kebab-case, e.g. my-org)",
)
@click.option(
    "--name",
    "name_opt",
    default=None,
    help="Technical extension name (kebab-case, e.g. dashboard-widgets)",
)
@click.option(
    "--display-name",
    "display_name_opt",
    default=None,
    help="Extension display name (e.g. Dashboard Widgets)",
)
@click.option(
    "--version", "version_opt", default=None, help="Initial version (default: 0.1.0)"
)
@click.option(
    "--license", "license_opt", default=None, help="License (default: Apache-2.0)"
)
@click.option(
    "--frontend/--no-frontend", "frontend_opt", default=None, help="Include frontend"
)
@click.option(
    "--backend/--no-backend", "backend_opt", default=None, help="Include backend"
)
def init(
    publisher_opt: str | None,
    name_opt: str | None,
    display_name_opt: str | None,
    version_opt: str | None,
    license_opt: str | None,
    frontend_opt: bool | None,
    backend_opt: bool | None,
) -> None:
    """Scaffold a new extension project."""
    # Get extension names with graceful validation
    names = prompt_for_extension_info(display_name_opt, publisher_opt, name_opt)

    version = version_opt or click.prompt("Initial version", default="0.1.0")
    license_ = license_opt or click.prompt("License", default="Apache-2.0")
    include_frontend = (
        frontend_opt
        if frontend_opt is not None
        else click.confirm("Include frontend?", default=True)
    )
    include_backend = (
        backend_opt
        if backend_opt is not None
        else click.confirm("Include backend?", default=True)
    )

    target_dir = Path.cwd() / names["name"]
    if target_dir.exists():
        click.secho(f"❌ Directory {target_dir} already exists.", fg="red")
        sys.exit(1)

    # Set up Jinja environment
    templates_dir = Path(__file__).parent / "templates"
    env = Environment(loader=FileSystemLoader(templates_dir))  # noqa: S701
    ctx = {
        **names,  # Include all name variants
        "include_frontend": include_frontend,
        "include_backend": include_backend,
        "license": license_,
        "version": version,
    }

    # Create base directory
    target_dir.mkdir()
    extension_json = env.get_template("extension.json.j2").render(ctx)
    (target_dir / "extension.json").write_text(extension_json)
    click.secho("✅ Created extension.json", fg="green")

    # Create .gitignore
    gitignore = env.get_template("gitignore.j2").render(ctx)
    (target_dir / ".gitignore").write_text(gitignore)
    click.secho("✅ Created .gitignore", fg="green")

    # Initialize frontend files
    if include_frontend:
        frontend_dir = target_dir / "frontend"
        frontend_dir.mkdir()
        frontend_src_dir = frontend_dir / "src"
        frontend_src_dir.mkdir()

        # frontend files
        package_json = env.get_template("frontend/package.json.j2").render(ctx)
        (frontend_dir / "package.json").write_text(package_json)
        webpack_config = env.get_template("frontend/webpack.config.js.j2").render(ctx)
        (frontend_dir / "webpack.config.js").write_text(webpack_config)
        tsconfig_json = env.get_template("frontend/tsconfig.json.j2").render(ctx)
        (frontend_dir / "tsconfig.json").write_text(tsconfig_json)
        index_tsx = env.get_template("frontend/src/index.tsx.j2").render(ctx)
        (frontend_src_dir / "index.tsx").write_text(index_tsx)
        click.secho("✅ Created frontend folder structure", fg="green")

    # Initialize backend files with publisher.name structure
    if include_backend:
        backend_dir = target_dir / "backend"
        backend_dir.mkdir()
        backend_src_dir = backend_dir / "src"
        backend_src_dir.mkdir()

        # Create publisher directory (e.g., my_org)
        publisher_snake = kebab_to_snake_case(names["publisher"])
        publisher_dir = backend_src_dir / publisher_snake
        publisher_dir.mkdir()

        # Create extension package directory (e.g., my_org/dashboard_widgets)
        name_snake = kebab_to_snake_case(names["name"])
        extension_package_dir = publisher_dir / name_snake
        extension_package_dir.mkdir()

        # backend files
        pyproject_toml = env.get_template("backend/pyproject.toml.j2").render(ctx)
        (backend_dir / "pyproject.toml").write_text(pyproject_toml)

        # Extension package files
        entrypoint_py = env.get_template("backend/src/package/entrypoint.py.j2").render(
            ctx
        )
        (extension_package_dir / "entrypoint.py").write_text(entrypoint_py)

        click.secho("✅ Created backend folder structure", fg="green")

    click.secho(
        f"🎉 Extension {names['display_name']} (ID: {names['id']}) initialized at {target_dir}",
        fg="cyan",
    )


if __name__ == "__main__":
    app()