"""
pyserve init - Initialize a new pyserve project
"""

from pathlib import Path

import click

TEMPLATES = {
    "basic": {
        "description": "Basic configuration with static files and routing",
        "filename": "config.yaml",
    },
    "orchestration": {
        "description": "Process orchestration with multiple ASGI/WSGI apps",
        "filename": "config.yaml",
    },
    "asgi": {
        "description": "ASGI mount configuration for in-process apps",
        "filename": "config.yaml",
    },
    "full": {
        "description": "Full configuration with all features",
        "filename": "config.yaml",
    },
}

BASIC_TEMPLATE = """\
# PyServe Configuration
# Generated by: pyserve init

http:
  static_dir: ./static
  templates_dir: ./templates

server:
  host: 0.0.0.0
  port: 8080
  backlog: 100
  proxy_timeout: 30.0

ssl:
  enabled: false
  cert_file: ./ssl/cert.pem
  key_file: ./ssl/key.pem

logging:
  level: INFO
  console_output: true
  format:
    type: standard
    use_colors: true
    show_module: true
    timestamp_format: "%Y-%m-%d %H:%M:%S"
  console:
    level: INFO
    format:
      type: standard
      use_colors: true
  files:
    - path: ./logs/pyserve.log
      level: INFO
      format:
        type: standard
        use_colors: false

extensions:
  - type: routing
    config:
      regex_locations:
        # Health check endpoint
        "=/health":
          return: "200 OK"
          content_type: "text/plain"

        # Static files
        "^/static/":
          root: "./static"
          strip_prefix: "/static"

        # Default fallback
        "__default__":
          spa_fallback: true
          root: "./static"
          index_file: "index.html"
"""

ORCHESTRATION_TEMPLATE = """\
# PyServe Process Orchestration Configuration
# Generated by: pyserve init --template orchestration
#
# This configuration runs multiple ASGI/WSGI apps as isolated processes
# with automatic health monitoring and restart.

server:
  host: 0.0.0.0
  port: 8080
  backlog: 2048
  proxy_timeout: 60.0

logging:
  level: INFO
  console_output: true
  format:
    type: standard
    use_colors: true
  files:
    - path: ./logs/pyserve.log
      level: DEBUG
      format:
        type: standard
        use_colors: false

extensions:
  # Process Orchestration - runs each app in its own process
  - type: process_orchestration
    config:
      port_range: [9000, 9999]
      health_check_enabled: true
      proxy_timeout: 60.0

      apps:
        # Example: FastAPI application
        - name: api
          path: /api
          app_path: myapp.api:app
          module_path: "."
          workers: 2
          health_check_path: /health
          health_check_interval: 10.0
          health_check_timeout: 5.0
          health_check_retries: 3
          max_restart_count: 5
          restart_delay: 1.0
          strip_path: true
          env:
            APP_ENV: "production"

        # Example: Flask application (WSGI)
        # - name: admin
        #   path: /admin
        #   app_path: myapp.admin:app
        #   app_type: wsgi
        #   module_path: "."
        #   workers: 1
        #   health_check_path: /health
        #   strip_path: true

  # Static files routing
  - type: routing
    config:
      regex_locations:
        "=/health":
          return: "200 OK"
          content_type: "text/plain"

        "^/static/":
          root: "./static"
          strip_prefix: "/static"
"""

ASGI_TEMPLATE = """\
# PyServe ASGI Mount Configuration
# Generated by: pyserve init --template asgi
#
# This configuration mounts ASGI apps in-process (like ASGI Lifespan).
# More efficient but apps share the same process.

server:
  host: 0.0.0.0
  port: 8080
  backlog: 100
  proxy_timeout: 30.0

logging:
  level: INFO
  console_output: true
  format:
    type: standard
    use_colors: true
  files:
    - path: ./logs/pyserve.log
      level: DEBUG

extensions:
  - type: asgi_mount
    config:
      mounts:
        # FastAPI app mounted at /api
        - path: /api
          app: myapp.api:app
          # factory: false  # Set to true if app is a factory function

        # Starlette app mounted at /web
        # - path: /web
        #   app: myapp.web:app

  - type: routing
    config:
      regex_locations:
        "=/health":
          return: "200 OK"
          content_type: "text/plain"

        "^/static/":
          root: "./static"
          strip_prefix: "/static"

        "__default__":
          spa_fallback: true
          root: "./static"
          index_file: "index.html"
"""

FULL_TEMPLATE = """\
# PyServe Full Configuration
# Generated by: pyserve init --template full
#
# Comprehensive configuration showcasing all PyServe features.

http:
  static_dir: ./static
  templates_dir: ./templates

server:
  host: 0.0.0.0
  port: 8080
  backlog: 2048
  default_root: false
  proxy_timeout: 60.0
  redirect_instructions:
    "/old-path": "/new-path"

ssl:
  enabled: false
  cert_file: ./ssl/cert.pem
  key_file: ./ssl/key.pem

logging:
  level: INFO
  console_output: true
  format:
    type: standard
    use_colors: true
    show_module: true
    timestamp_format: "%Y-%m-%d %H:%M:%S"
  console:
    level: DEBUG
    format:
      type: standard
      use_colors: true
  files:
    # Main log file
    - path: ./logs/pyserve.log
      level: DEBUG
      format:
        type: standard
        use_colors: false

    # JSON logs for log aggregation
    - path: ./logs/pyserve.json
      level: INFO
      format:
        type: json

    # Access logs
    - path: ./logs/access.log
      level: INFO
      loggers: ["pyserve.access"]
      max_bytes: 10485760  # 10MB
      backup_count: 10

extensions:
  # Process Orchestration for background services
  - type: process_orchestration
    config:
      port_range: [9000, 9999]
      health_check_enabled: true
      proxy_timeout: 60.0

      apps:
        - name: api
          path: /api
          app_path: myapp.api:app
          module_path: "."
          workers: 2
          health_check_path: /health
          strip_path: true
          env:
            APP_ENV: "production"

  # Advanced routing with regex
  - type: routing
    config:
      regex_locations:
        # API versioning
        "~^/api/v(?P<version>\\\\d+)/":
          proxy_pass: "http://localhost:9001"
          headers:
            - "API-Version: {version}"
            - "X-Forwarded-For: $remote_addr"

        # Static files with caching
        "~*\\\\.(js|css|png|jpg|gif|ico|svg|woff2?)$":
          root: "./static"
          cache_control: "public, max-age=31536000"
          headers:
            - "Access-Control-Allow-Origin: *"

        # Health check
        "=/health":
          return: "200 OK"
          content_type: "text/plain"

        # Static files
        "^/static/":
          root: "./static"
          strip_prefix: "/static"

        # SPA fallback
        "__default__":
          spa_fallback: true
          root: "./static"
          index_file: "index.html"
"""


def get_template_content(template: str) -> str:
    templates = {
        "basic": BASIC_TEMPLATE,
        "orchestration": ORCHESTRATION_TEMPLATE,
        "asgi": ASGI_TEMPLATE,
        "full": FULL_TEMPLATE,
    }
    return templates.get(template, BASIC_TEMPLATE)


@click.command("init")
@click.option(
    "-t",
    "--template",
    "template",
    type=click.Choice(list(TEMPLATES.keys())),
    default="basic",
    help="Configuration template to use",
)
@click.option(
    "-o",
    "--output",
    "output_file",
    default="config.yaml",
    help="Output file path (default: config.yaml)",
)
@click.option(
    "-f",
    "--force",
    is_flag=True,
    help="Overwrite existing configuration",
)
@click.option(
    "--list-templates",
    is_flag=True,
    help="List available templates",
)
@click.pass_context
def init_cmd(
    ctx: click.Context,
    template: str,
    output_file: str,
    force: bool,
    list_templates: bool,
) -> None:
    """
    Initialize a new pyserve project.

    Creates a configuration file with sensible defaults and directory structure.

    \b
    Examples:
      pyserve init                          # Basic configuration
      pyserve init -t orchestration         # Process orchestration setup
      pyserve init -t asgi                  # ASGI mount setup
      pyserve init -t full                  # All features
      pyserve init -o production.yaml       # Custom output file
    """
    from ..output import console, print_info, print_success, print_warning

    if list_templates:
        console.print("\n[bold]Available Templates:[/bold]\n")
        for name, info in TEMPLATES.items():
            console.print(f"  [cyan]{name:15}[/cyan] - {info['description']}")
        console.print()
        return

    output_path = Path(output_file)

    if output_path.exists() and not force:
        print_warning(f"Configuration file '{output_file}' already exists.")
        if not click.confirm("Do you want to overwrite it?"):
            raise click.Abort()

    dirs_to_create = ["static", "templates", "logs"]
    if template == "orchestration":
        dirs_to_create.append("apps")

    for dir_name in dirs_to_create:
        dir_path = Path(dir_name)
        if not dir_path.exists():
            dir_path.mkdir(parents=True)
            print_info(f"Created directory: {dir_name}/")

    state_dir = Path(".pyserve")
    if not state_dir.exists():
        state_dir.mkdir()
        print_info("Created directory: .pyserve/")

    content = get_template_content(template)
    output_path.write_text(content)

    print_success(f"Created configuration file: {output_file}")
    print_info(f"Template: {template}")

    gitignore_path = Path(".pyserve/.gitignore")
    if not gitignore_path.exists():
        gitignore_path.write_text("*\n!.gitignore\n")

    console.print()
    console.print("[bold]Next steps:[/bold]")
    console.print(f"  1. Edit [cyan]{output_file}[/cyan] to configure your services")
    console.print("  2. Run [cyan]pyserve config validate[/cyan] to check configuration")
    console.print("  3. Run [cyan]pyserve up[/cyan] to start services")
    console.print()