"""FlowDeck — Sidebar customization API (v4.6.0)."""
from __future__ import annotations

import json
import logging

from fastapi import APIRouter, HTTPException, Request

from app.auth.session import SessionManager
from app.db import get_conn

logger = logging.getLogger(__name__)
router = APIRouter(tags=["sidebar"], prefix="/api/sidebar")


def _get_user(request: Request) -> dict:
    user = SessionManager.decode_session(request.cookies.get("flowdeck_session", ""))
    if not user:
        raise HTTPException(status_code=401, detail="Not authenticated")
    return user


DEFAULT_CONFIG = {
    "workspace": {"visible": True, "order": 0, "show_count": None},
    "gitea": {"visible": True, "order": 1, "show_count": None},
    "meetings": {"visible": True, "order": 2, "show_count": 5},
    "recents": {"visible": True, "order": 3, "show_count": 10},
    "favorites": {"visible": True, "order": 4, "show_count": 10},
    "agents": {"visible": True, "order": 5, "show_count": None},
    "teamspaces": {"visible": True, "order": 6, "show_count": None},
    "shared": {"visible": True, "order": 7, "show_count": 10},
    "published": {"visible": True, "order": 8, "show_count": 10},
    "private": {"visible": True, "order": 9, "show_count": None},
}


@router.get("/config")
def get_sidebar_config(request: Request):
    """Get the current user's sidebar customization config."""
    user = _get_user(request)
    with get_conn() as conn:
        row = conn.execute(
            "SELECT sidebar_config FROM users WHERE id=?", (user["id"],)
        ).fetchone()
    if not row:
        return {"config": DEFAULT_CONFIG}

    raw = row["sidebar_config"]
    if not raw:
        return {"config": DEFAULT_CONFIG}

    try:
        stored = json.loads(raw)
    except (json.JSONDecodeError, TypeError):
        return {"config": DEFAULT_CONFIG}

    # Merge with defaults to ensure all keys exist
    merged = dict(DEFAULT_CONFIG)
    merged.update(stored)
    return {"config": merged}


def get_sidebar_config_sync(user_id: int) -> dict:
    """Synchronous helper to get sidebar config (used during template rendering)."""
    with get_conn() as conn:
        row = conn.execute(
            "SELECT sidebar_config FROM users WHERE id=?", (user_id,)
        ).fetchone()
    if not row:
        return dict(DEFAULT_CONFIG)
    raw = row["sidebar_config"]
    if not raw:
        return dict(DEFAULT_CONFIG)
    try:
        stored = json.loads(raw)
    except (json.JSONDecodeError, TypeError):
        return dict(DEFAULT_CONFIG)
    merged = dict(DEFAULT_CONFIG)
    merged.update(stored)
    return merged


@router.put("/config")
async def save_sidebar_config(request: Request):
    """Save the current user's sidebar customization config."""
    user = _get_user(request)
    try:
        body = await request.json()
    except Exception:
        raise HTTPException(status_code=400, detail="Invalid JSON body") from None

    config = body.get("config")
    if not config or not isinstance(config, dict):
        raise HTTPException(status_code=400, detail="config object is required")

    # Merge with defaults to ensure validity
    merged = dict(DEFAULT_CONFIG)
    for key, val in config.items():
        if key in DEFAULT_CONFIG and isinstance(val, dict):
            merged[key] = {
                "visible": val.get("visible", DEFAULT_CONFIG[key]["visible"]),
                "order": val.get("order", DEFAULT_CONFIG[key]["order"]),
                "show_count": val.get("show_count", DEFAULT_CONFIG[key]["show_count"]),
            }
        elif key not in DEFAULT_CONFIG:
            # Allow new custom sections
            merged[key] = val

    with get_conn() as conn:
        conn.execute(
            "UPDATE users SET sidebar_config=? WHERE id=?",
            (json.dumps(merged), user["id"]),
        )
        conn.commit()

    return {"status": "ok", "config": merged}