from fastapi import APIRouter, Depends, Query
from uuid import UUID
from sqlalchemy.ext.asyncio import AsyncSession
from database.postgres import get_pg_session
from auth.dependencies import require_permission
from auth.models import TokenPayload
from tickets import service
from tickets.models import TicketCreate, TicketUpdate, MessageCreate, EscalateIn, TicketOut, TicketListResponse
from shared.audit import log_action

router = APIRouter(prefix="/api/tickets", tags=["tickets"])


@router.get("", response_model=TicketListResponse)
async def list_tickets(
    status:      str | None = Query(None),
    priority:    str | None = Query(None),
    customer_id: str | None = Query(None),
    page:  int = Query(1, ge=1),
    limit: int = Query(25, ge=1, le=100),
    db:    AsyncSession = Depends(get_pg_session),
    _user: TokenPayload = Depends(require_permission("crm", "view")),
):
    rows, total = await service.list_tickets(db, status, priority, customer_id, page, limit)
    return {"data": rows, "pagination": {"page": page, "limit": limit, "total": total}}


@router.get("/by-customer/{customer_id}", response_model=list[TicketOut])
async def list_by_customer(
    customer_id: str,
    db:    AsyncSession = Depends(get_pg_session),
    _user: TokenPayload = Depends(require_permission("crm", "view")),
):
    return await service.list_by_customer(db, customer_id)


@router.get("/by-device/{device_id}", response_model=list[TicketOut])
async def list_by_device(
    device_id: str,
    db:    AsyncSession = Depends(get_pg_session),
    _user: TokenPayload = Depends(require_permission("crm", "view")),
):
    return await service.list_by_device(db, device_id)


@router.get("/{ticket_id}", response_model=TicketOut)
async def get_ticket(
    ticket_id: UUID,
    db:    AsyncSession = Depends(get_pg_session),
    _user: TokenPayload = Depends(require_permission("crm", "view")),
):
    return await service.get_ticket(db, ticket_id)


@router.post("", response_model=TicketOut, status_code=201)
async def create_ticket(
    body:  TicketCreate,
    db:    AsyncSession = Depends(get_pg_session),
    _user: TokenPayload = Depends(require_permission("crm", "add")),
):
    ticket = await service.create_ticket(db, body)
    await log_action(db, _user.sub, _user.name or _user.email, "CREATE", "ticket",
                     str(ticket.id), ticket.subject)
    return ticket


@router.patch("/{ticket_id}", response_model=TicketOut)
async def update_ticket(
    ticket_id: UUID, body: TicketUpdate,
    db:    AsyncSession = Depends(get_pg_session),
    _user: TokenPayload = Depends(require_permission("crm", "edit")),
):
    ticket = await service.update_ticket(db, ticket_id, body)
    action = "STATUS_CHANGE" if body.status is not None else "UPDATE"
    await log_action(db, _user.sub, _user.name or _user.email, action, "ticket",
                     str(ticket_id), ticket.subject)
    return ticket


@router.post("/{ticket_id}/messages", response_model=TicketOut)
async def add_message(
    ticket_id: UUID, body: MessageCreate,
    db:    AsyncSession = Depends(get_pg_session),
    _user: TokenPayload = Depends(require_permission("crm", "edit")),
):
    ticket = await service.add_message(db, ticket_id, body)
    await log_action(db, _user.sub, _user.name or _user.email, "UPDATE", "ticket",
                     str(ticket_id), ticket.subject, meta={"action_detail": "message_added"})
    return ticket


@router.post("/{ticket_id}/escalate", response_model=TicketOut)
async def escalate(
    ticket_id: UUID, body: EscalateIn,
    db:    AsyncSession = Depends(get_pg_session),
    _user: TokenPayload = Depends(require_permission("crm", "edit")),
):
    ticket = await service.escalate_to_issue(db, ticket_id, body.entry_id)
    await log_action(db, _user.sub, _user.name or _user.email, "STATUS_CHANGE", "ticket",
                     str(ticket_id), ticket.subject, meta={"action_detail": "escalated_to_issue"})
    return ticket