"""Config flow for OpenClaw Conversation integration."""
from __future__ import annotations

import logging
from typing import Any

import voluptuous as vol

from homeassistant import config_entries
from homeassistant.const import CONF_HOST, CONF_PORT
from homeassistant.core import callback
from homeassistant.data_entry_flow import FlowResult
import homeassistant.helpers.config_validation as cv

from .const import (
    CONF_AGENT_NAME,
    CONF_OPENCLAW_HOST,
    CONF_OPENCLAW_PORT,
    CONF_TIMEOUT,
    DEFAULT_AGENT,
    DEFAULT_HOST,
    DEFAULT_PORT,
    DEFAULT_TIMEOUT,
    DOMAIN,
)

_LOGGER = logging.getLogger(__name__)

STEP_USER_DATA_SCHEMA = vol.Schema(
    {
        vol.Optional(CONF_OPENCLAW_HOST, default=DEFAULT_HOST): cv.string,
        vol.Optional(CONF_OPENCLAW_PORT, default=DEFAULT_PORT): cv.port,
        vol.Optional(CONF_AGENT_NAME, default=DEFAULT_AGENT): cv.string,
        vol.Optional(CONF_TIMEOUT, default=DEFAULT_TIMEOUT): cv.positive_int,
    }
)


class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
    """Handle a config flow for OpenClaw Conversation."""

    VERSION = 1

    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Handle the initial step."""
        errors: dict[str, str] = {}
        
        if user_input is not None:
            # Validate the input
            try:
                # Test connection to OpenClaw
                await self._test_openclaw_connection(
                    user_input[CONF_OPENCLAW_HOST],
                    user_input[CONF_OPENCLAW_PORT],
                )
                
                return self.async_create_entry(
                    title="OpenClaw Conversation",
                    data=user_input,
                )
            except ConnectionError:
                errors["base"] = "cannot_connect"
            except Exception:
                _LOGGER.exception("Unexpected exception")
                errors["base"] = "unknown"
        
        return self.async_show_form(
            step_id="user",
            data_schema=STEP_USER_DATA_SCHEMA,
            errors=errors,
        )
    
    async def _test_openclaw_connection(self, host: str, port: int) -> None:
        """Test if OpenClaw is reachable."""
        import asyncio
        
        try:
            # Try to connect to OpenClaw
            reader, writer = await asyncio.wait_for(
                asyncio.open_connection(host, port),
                timeout=5,
            )
            writer.close()
            await writer.wait_closed()
        except Exception as err:
            raise ConnectionError(f"Cannot connect to OpenClaw: {err}")
    
    @staticmethod
    @callback
    def async_get_options_flow(
        config_entry: config_entries.ConfigEntry,
    ) -> OptionsFlow:
        """Create the options flow."""
        return OptionsFlow(config_entry)


class OptionsFlow(config_entries.OptionsFlow):
    """Handle options flow for OpenClaw Conversation."""

    def __init__(self, config_entry: config_entries.ConfigEntry) -> None:
        """Initialize options flow."""
        self.config_entry = config_entry
    
    async def async_step_init(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Manage the options."""
        errors: dict[str, str] = {}
        
        if user_input is not None:
            return self.async_create_entry(title="", data=user_input)
        
        options = {
            vol.Optional(
                CONF_AGENT_NAME,
                default=self.config_entry.options.get(
                    CONF_AGENT_NAME, DEFAULT_AGENT
                ),
            ): cv.string,
            vol.Optional(
                CONF_TIMEOUT,
                default=self.config_entry.options.get(
                    CONF_TIMEOUT, DEFAULT_TIMEOUT
                ),
            ): cv.positive_int,
        }
        
        return self.async_show_form(
            step_id="init",
            data_schema=vol.Schema(options),
            errors=errors,
        )