"""MiniBusinessLog CRUD API — follow-up log entries for mini business opportunities."""

import uuid
from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from app.database import get_db
from app.middleware.auth import get_current_user, require_any_role
from app.models.mini_business import MiniBusiness
from app.models.mini_business_log import MiniBusinessLog
from app.models.user import User
from app.schemas.mini_business_log import (
    MiniBusinessLogCreate, MiniBusinessLogUpdate, MiniBusinessLogOut,
)

router = APIRouter(prefix="/mini-business", tags=["MiniBusiness Logs"])


async def _get_log(db: AsyncSession, log_id: str) -> MiniBusinessLog:
    result = await db.execute(select(MiniBusinessLog).where(MiniBusinessLog.id == log_id))
    log = result.scalar_one_or_none()
    if not log:
        raise HTTPException(status_code=404, detail="跟进记录不存在")
    return log


@router.get("/{business_id}/logs")
async def list_logs(
    business_id: str,
    current_user: dict = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    """List follow-up logs for a mini business, newest first."""
    # Verify business exists and user has access
    mb = await db.get(MiniBusiness, business_id)
    if not mb:
        raise HTTPException(status_code=404, detail="商机不存在")
    if current_user["role"] == "manager" and str(mb.manager_id) != current_user["user_id"]:
        raise HTTPException(status_code=403, detail="Access denied")

    result = await db.execute(
        select(MiniBusinessLog)
        .where(MiniBusinessLog.business_id == business_id)
        .order_by(MiniBusinessLog.log_date.desc(), MiniBusinessLog.created_at.desc())
    )
    logs = result.scalars().all()

    # Resolve creator names
    user_ids = {log.created_by for log in logs}
    users = (await db.execute(select(User).where(User.id.in_(user_ids)))).scalars().all()
    user_map = {u.id: u.name for u in users}

    return [
        {
            "id": log.id,
            "business_id": log.business_id,
            "log_date": str(log.log_date),
            "method": log.method,
            "content": log.content,
            "created_by": log.created_by,
            "created_by_name": user_map.get(log.created_by, ""),
            "created_at": str(log.created_at) if log.created_at else None,
        }
        for log in logs
    ]


@router.post("/{business_id}/logs")
async def create_log(
    business_id: str,
    data: MiniBusinessLogCreate,
    current_user: dict = Depends(require_any_role),
    db: AsyncSession = Depends(get_db),
):
    """Add a follow-up log entry."""
    mb = await db.get(MiniBusiness, business_id)
    if not mb:
        raise HTTPException(status_code=404, detail="商机不存在")
    if current_user["role"] == "manager" and str(mb.manager_id) != current_user["user_id"]:
        raise HTTPException(status_code=403, detail="Access denied")

    log = MiniBusinessLog(
        business_id=uuid.UUID(business_id),
        log_date=data.log_date,
        method=data.method,
        content=data.content,
        created_by=uuid.UUID(current_user["user_id"]),
    )
    db.add(log)
    await db.commit()
    await db.refresh(log)

    creator = await db.get(User, log.created_by)
    return {
        "id": log.id,
        "business_id": log.business_id,
        "log_date": str(log.log_date),
        "method": log.method,
        "content": log.content,
        "created_by": log.created_by,
        "created_by_name": creator.name if creator else "",
        "created_at": str(log.created_at) if log.created_at else None,
    }


@router.put("/logs/{log_id}")
async def update_log(
    log_id: str,
    data: MiniBusinessLogUpdate,
    current_user: dict = Depends(require_any_role),
    db: AsyncSession = Depends(get_db),
):
    """Update a follow-up log entry."""
    log = await _get_log(db, log_id)

    # Managers can only edit their own logs; directors/leaders can edit any
    if current_user["role"] == "manager" and str(log.created_by) != current_user["user_id"]:
        raise HTTPException(status_code=403, detail="Access denied")

    update_data = data.model_dump(exclude_unset=True)
    for k, v in update_data.items():
        setattr(log, k, v)

    await db.commit()
    await db.refresh(log)
    return {"id": log.id, "log_date": str(log.log_date), "method": log.method, "content": log.content}


@router.delete("/logs/{log_id}")
async def delete_log(
    log_id: str,
    current_user: dict = Depends(require_any_role),
    db: AsyncSession = Depends(get_db),
):
    """Delete a follow-up log entry."""
    log = await _get_log(db, log_id)

    if current_user["role"] == "manager" and str(log.created_by) != current_user["user_id"]:
        raise HTTPException(status_code=403, detail="Access denied")

    await db.delete(log)
    await db.commit()
    return {"status": "deleted"}