"""
Circleback Webhook Route

This module provides a webhook endpoint for receiving meeting data from Circleback.
It processes the incoming webhook payload and saves it as a document in the specified search space.
"""

import logging
from datetime import datetime
from typing import Any

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel, Field

logger = logging.getLogger(__name__)

router = APIRouter()


# Pydantic models for Circleback webhook payload
class CirclebackAttendee(BaseModel):
    """Attendee model for Circleback meeting."""

    name: str | None = None
    email: str | None = None


class CirclebackActionItemAssignee(BaseModel):
    """Assignee model for action items."""

    name: str | None = None
    email: str | None = None


class CirclebackActionItem(BaseModel):
    """Action item model for Circleback meeting."""

    id: int
    title: str
    description: str = ""
    assignee: CirclebackActionItemAssignee | None = None
    status: str = "PENDING"


class CirclebackTranscriptSegment(BaseModel):
    """Transcript segment model for Circleback meeting."""

    speaker: str
    text: str
    timestamp: float


class CirclebackInsightItem(BaseModel):
    """Individual insight item."""

    insight: str | dict[str, Any]
    speaker: str | None = None
    timestamp: float | None = None


class CirclebackWebhookPayload(BaseModel):
    """
    Circleback webhook payload model.

    This model represents the data sent by Circleback when a meeting is processed.
    """

    model_config = {"populate_by_name": True}

    id: int = Field(..., description="Circleback meeting ID")
    name: str = Field(..., description="Meeting name")
    created_at: str = Field(
        ..., alias="createdAt", description="Meeting creation date in ISO format"
    )
    duration: float = Field(..., description="Meeting duration in seconds")
    url: str | None = Field(None, description="URL of the virtual meeting")
    recording_url: str | None = Field(
        None,
        alias="recordingUrl",
        description="URL of the meeting recording (valid for 24 hours)",
    )
    tags: list[str] = Field(default_factory=list, description="Meeting tags")
    ical_uid: str | None = Field(
        None, alias="icalUid", description="Unique identifier of the calendar event"
    )
    attendees: list[CirclebackAttendee] = Field(
        default_factory=list, description="Meeting attendees"
    )
    notes: str = Field("", description="Meeting notes in Markdown format")
    action_items: list[CirclebackActionItem] = Field(
        default_factory=list,
        alias="actionItems",
        description="Action items from the meeting",
    )
    transcript: list[CirclebackTranscriptSegment] = Field(
        default_factory=list, description="Meeting transcript segments"
    )
    insights: dict[str, list[CirclebackInsightItem]] = Field(
        default_factory=dict, description="Custom insights from the meeting"
    )


def format_circleback_meeting_to_markdown(payload: CirclebackWebhookPayload) -> str:
    """
    Convert Circleback webhook payload to a well-formatted Markdown document.

    Args:
        payload: The Circleback webhook payload

    Returns:
        Markdown string representation of the meeting
    """
    lines = []

    # Title
    lines.append(f"# {payload.name}")
    lines.append("")

    # Meeting metadata
    lines.append("## Meeting Details")
    lines.append("")

    # Parse and format date
    try:
        created_dt = datetime.fromisoformat(payload.created_at.replace("Z", "+00:00"))
        formatted_date = created_dt.strftime("%Y-%m-%d %H:%M:%S UTC")
    except (ValueError, AttributeError):
        formatted_date = payload.created_at

    lines.append(f"- **Date:** {formatted_date}")
    lines.append(f"- **Duration:** {int(payload.duration // 60)} minutes")

    if payload.url:
        lines.append(f"- **Meeting URL:** {payload.url}")

    if payload.tags:
        lines.append(f"- **Tags:** {', '.join(payload.tags)}")

    lines.append(
        f"- **Circleback Link:** [View on Circleback](https://app.circleback.ai/meetings/{payload.id})"
    )
    lines.append("")

    # Attendees
    if payload.attendees:
        lines.append("## Attendees")
        lines.append("")
        for attendee in payload.attendees:
            name = attendee.name or "Unknown"
            if attendee.email:
                lines.append(f"- **{name}** ({attendee.email})")
            else:
                lines.append(f"- **{name}**")
        lines.append("")

    # Notes (if provided)
    if payload.notes:
        lines.append("## Meeting Notes")
        lines.append("")
        lines.append(payload.notes)
        lines.append("")

    # Action Items
    if payload.action_items:
        lines.append("## Action Items")
        lines.append("")
        for item in payload.action_items:
            status_emoji = "✅" if item.status == "DONE" else "⬜"
            assignee_text = ""
            if item.assignee and item.assignee.name:
                assignee_text = f" (Assigned to: {item.assignee.name})"

            lines.append(f"{status_emoji} **{item.title}**{assignee_text}")
            if item.description:
                lines.append(f"   {item.description}")
            lines.append("")

    # Insights
    if payload.insights:
        lines.append("## Insights")
        lines.append("")
        for insight_name, insight_items in payload.insights.items():
            lines.append(f"### {insight_name}")
            lines.append("")
            for insight_item in insight_items:
                if isinstance(insight_item.insight, dict):
                    for key, value in insight_item.insight.items():
                        lines.append(f"- **{key}:** {value}")
                else:
                    speaker_info = (
                        f" _{insight_item.speaker}_" if insight_item.speaker else ""
                    )
                    lines.append(f"- {insight_item.insight}{speaker_info}")
            lines.append("")

    # Transcript
    if payload.transcript:
        lines.append("## Transcript")
        lines.append("")
        for segment in payload.transcript:
            # Format timestamp as MM:SS
            minutes = int(segment.timestamp // 60)
            seconds = int(segment.timestamp % 60)
            timestamp_str = f"[{minutes:02d}:{seconds:02d}]"
            lines.append(f"**{segment.speaker}** {timestamp_str}: {segment.text}")
            lines.append("")

    return "\n".join(lines)


@router.post("/webhooks/circleback/{search_space_id}")
async def receive_circleback_webhook(
    search_space_id: int,
    payload: CirclebackWebhookPayload,
):
    """
    Receive and process a Circleback webhook.

    This endpoint receives meeting data from Circleback and saves it as a document
    in the specified search space. The meeting data is converted to Markdown format
    and processed asynchronously.

    Args:
        search_space_id: The ID of the search space to save the document to
        payload: The Circleback webhook payload containing meeting data

    Returns:
        Success message with document details

    Note:
        This endpoint does not require authentication as it's designed to receive
        webhooks from Circleback. Signature verification can be added later for security.
    """
    try:
        logger.info(
            f"Received Circleback webhook for meeting {payload.id} in search space {search_space_id}"
        )

        # Convert to markdown
        markdown_content = format_circleback_meeting_to_markdown(payload)

        # Trigger async document processing
        from app.tasks.celery_tasks.document_tasks import (
            process_circleback_meeting_task,
        )

        # Prepare meeting metadata for the task
        meeting_metadata = {
            "circleback_meeting_id": payload.id,
            "meeting_name": payload.name,
            "meeting_date": payload.created_at,
            "duration_seconds": payload.duration,
            "meeting_url": payload.url,
            "tags": payload.tags,
            "attendees_count": len(payload.attendees),
            "action_items_count": len(payload.action_items),
            "has_transcript": len(payload.transcript) > 0,
        }

        # Queue the processing task
        process_circleback_meeting_task.delay(
            meeting_id=payload.id,
            meeting_name=payload.name,
            markdown_content=markdown_content,
            metadata=meeting_metadata,
            search_space_id=search_space_id,
        )

        logger.info(
            f"Queued Circleback meeting {payload.id} for processing in search space {search_space_id}"
        )

        return {
            "status": "accepted",
            "message": f"Meeting '{payload.name}' queued for processing",
            "meeting_id": payload.id,
            "search_space_id": search_space_id,
        }

    except Exception as e:
        logger.error(f"Error processing Circleback webhook: {e!s}", exc_info=True)
        raise HTTPException(
            status_code=500,
            detail=f"Failed to process Circleback webhook: {e!s}",
        ) from e


@router.get("/webhooks/circleback/{search_space_id}/info")
async def get_circleback_webhook_info(
    search_space_id: int,
):
    """
    Get information about the Circleback webhook endpoint.

    This endpoint provides information about how to configure the Circleback
    webhook integration.

    Args:
        search_space_id: The ID of the search space

    Returns:
        Webhook configuration information
    """
    from app.config import config

    # Construct the webhook URL
    base_url = getattr(config, "API_BASE_URL", "http://localhost:8000")
    webhook_url = f"{base_url}/api/v1/webhooks/circleback/{search_space_id}"

    return {
        "webhook_url": webhook_url,
        "search_space_id": search_space_id,
        "method": "POST",
        "content_type": "application/json",
        "description": "Use this URL in your Circleback automation to send meeting data to SurfSense",
        "note": "Configure this URL in Circleback Settings → Automations → Create automation → Send webhook request",
    }