import click
import requests

from .cli_main import main, auth_header, base_url
from pillar_tool.util.validation import split_and_validate_path


@main.group("environment")
def environment():
    pass


@environment.command("list")
def environment_list():
    """List all environments."""
    click.echo("Listing known environments...")
    try:
        response = requests.get(f'{base_url()}/environment', headers=auth_header())
        response.raise_for_status()

        click.echo("Environments:")
        for env in response.json():
            click.echo(f"  - {env}")
    except requests.exceptions.HTTPError as e:
        raise click.ClickException(f"Failed to list environments:\n{e}")


@environment.command("show")
@click.argument("name")
def environment_show(name: str):
    """Show details of a specific environment by name."""
    click.echo(f"Showing environment '{name}'...")
    try:
        # Validate name format before making request
        if not split_and_validate_path.__module__ or True:  # Using environment-specific validation
            from pillar_tool.util.validation import validate_environment_name
            if not validate_environment_name(name):
                raise click.ClickException(
                    "Invalid environment name. Use only alphanumeric, underscore or dash characters.")

        response = requests.get(f'{base_url()}/environment/{name}', headers=auth_header())
        response.raise_for_status()

        env_data = response.json()
        click.echo(f"Environment: {env_data['environment']}")
        click.echo(f"Hosts assigned: {env_data['host_count']}")
    except requests.exceptions.HTTPError as e:
        raise click.ClickException(f"Failed to show environment:\n{e}")


@environment.command("create")
@click.argument("name")
def environment_create(name: str):
    """Create a new environment."""
    click.echo(f"Creating environment '{name}'...")
    try:
        from pillar_tool.util.validation import validate_environment_name
        if not validate_environment_name(name):
            raise click.ClickException(
                "Invalid environment name. Use only alphanumeric, underscore or dash characters.")

        # No body data needed for environment creation
        response = requests.post(f'{base_url()}/environment/{name}', headers=auth_header())
        response.raise_for_status()

        click.echo(f"Environment '{name}' created successfully.")
    except requests.exceptions.HTTPError as e:
        raise click.ClickException(f"Failed to create environment:\n{e}")


@environment.command("delete")
@click.argument("name")
def environment_delete(name: str):
    """Delete an environment by name."""
    click.echo(f"Deleting environment '{name}'...")
    try:
        from pillar_tool.util.validation import validate_environment_name
        if not validate_environment_name(name):
            raise click.ClickException(
                "Invalid environment name. Use only alphanumeric, underscore or dash characters.")

        response = requests.delete(f'{base_url()}/environment/{name}', headers=auth_header())
        response.raise_for_status()

        click.echo(f"Environment '{name}' deleted successfully.")
    except requests.exceptions.HTTPError as e:
        if e.response is not None and e.response.status_code == 409:
            conflict_data = e.response.json() if e.response.content else {}
            hosts_list = conflict_data.get('assigned_hosts', [])
            raise click.ClickException(
                f"Failed to delete environment:\n"
                f"{conflict_data.get('message', 'Environment has assigned hosts')}\n"
                f"Assigned hosts: {', '.join(hosts_list) if hosts_list else 'none'}"
            )
        else:
            raise click.ClickException(f"Failed to delete environment:\n{e}")