"""Timeline agent — tool definitions for project milestone CRUD."""

from __future__ import annotations

from typing import Any

from langchain_core.tools import tool

from app.core.ws_context import execute_on_client


@tool
async def list_timelines(project_id: str = "") -> str:
    """List timelines. Provide project_id to scope to a specific project."""
    result = await execute_on_client(
        action="select",
        table="timelines",
        filters={"projectId": project_id or None},
    )
    rows = result.get("rows", [])
    if not rows:
        return "No timelines found."
    lines = [f"- {r['title']} (date: {r['date']}, id: {r['id']})" for r in rows]
    return f"Found {len(rows)} timeline(s):\n" + "\n".join(lines)


@tool
async def create_timeline(
    project_id: str,
    title: str,
    date: int,
    is_ai_suggested: int = 0,
    is_approved: int = 0,
) -> str:
    """Create a project timeline (milestone).
    project_id: REQUIRED UUID of the parent project
    title: descriptive name for the milestone
    date: Unix timestamp in milliseconds
    is_ai_suggested: 1 if proactively suggested, 0 if user-requested
    is_approved: 0 until the user confirms
    """
    result = await execute_on_client(
        action="insert",
        table="timelines",
        data={
            "projectId": project_id,
            "title": title,
            "date": date,
            "isAiSuggested": is_ai_suggested,
            "isApproved": is_approved,
        },
    )
    row = result["row"]
    return f"Timeline created: '{row['title']}' (id: {row['id']}, date: {row['date']})"


@tool
async def update_timeline(
    timeline_id: str,
    title: str = "",
    date: int = -1,
    is_approved: int = -1,
) -> str:
    """Update a timeline. Only pass fields that should change.
    timeline_id: UUID of the timeline (required)
    date: -1 means unchanged; any other value sets the new date (ms timestamp)
    is_approved: -1 means unchanged; 0 or 1 sets the approval state
    """
    updates: dict[str, Any] = {}
    if title:
        updates["title"] = title
    if date != -1:
        updates["date"] = date
    if is_approved != -1:
        updates["isApproved"] = is_approved
    result = await execute_on_client(
        action="update",
        table="timelines",
        data={"id": timeline_id, "updates": updates},
    )
    row = result["row"]
    return f"Timeline updated: '{row['title']}' (id: {row['id']})"


@tool
async def delete_timeline(timeline_id: str) -> str:
    """Delete a timeline permanently by its UUID."""
    await execute_on_client(action="delete", table="timelines", data={"id": timeline_id})
    return f"Timeline {timeline_id} deleted."