"""Pydantic schemas for ticket CRUD, timeline, photos, and SLA."""

from __future__ import annotations

from datetime import datetime
from decimal import Decimal

from pydantic import BaseModel, Field


# ── Category ─────────────────────────────────────────────────────────
class CategoryOut(BaseModel):
    id: int
    type: str
    name: str
    parent_id: int | None = None
    sla_urgency: str | None = None

    model_config = {"from_attributes": True}


class CategoryTreeOut(CategoryOut):
    children: list[CategoryTreeOut] = []


# ── Ticket ───────────────────────────────────────────────────────────
class TicketCreate(BaseModel):
    unit_id: int | None = None
    category_id: int | None = None
    priority: str | None = None  # urgent, high, medium, low
    reporter: str | None = None
    reported_via: str | None = None  # whatsapp, phone, walk-in, qr, agent
    description: str | None = None
    assigned_to: int | None = None


class TicketUpdate(BaseModel):
    status: str | None = None
    unit_id: int | None = None
    category_id: int | None = None
    priority: str | None = None
    reporter: str | None = None
    reported_via: str | None = None
    description: str | None = None
    assigned_to: int | None = None
    eta: datetime | None = None
    cost: Decimal | None = None
    parts_used: str | None = None
    note: str | None = None


class TicketTimelineOut(BaseModel):
    id: int
    ticket_id: int
    from_status: str | None = None
    to_status: str | None = None
    note: str | None = None
    user_id: int | None = None
    created_at: datetime

    model_config = {"from_attributes": True}


class TicketPhotoOut(BaseModel):
    id: int
    ticket_id: int
    photo_url: str
    is_before: bool

    model_config = {"from_attributes": True}


class TicketBrief(BaseModel):
    """Summary view for list endpoints."""
    id: int
    ticket_number: str
    status: str
    priority: str | None = None
    unit_id: int | None = None
    category_id: int | None = None
    assigned_to: int | None = None
    reporter: str | None = None
    description: str | None = None
    sla_deadline: datetime | None = None
    reopen_count: int = 0
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class TicketOut(TicketBrief):
    """Full ticket detail with relations."""
    closed_at: datetime | None = None
    eta: datetime | None = None
    cost: Decimal | None = None
    parts_used: str | None = None
    customer_rating: int | None = None
    timeline: list[TicketTimelineOut] = []
    photos: list[TicketPhotoOut] = []
    sla_status: dict | None = None


class TicketListResponse(BaseModel):
    items: list[TicketBrief]
    total: int
    page: int
    page_size: int


# ── SLA ──────────────────────────────────────────────────────────────
class SLAStatusOut(BaseModel):
    priority: str | None = None
    response_deadline: str | None = None
    resolution_deadline: str | None = None
    response_breached: bool = False
    resolution_breached: bool = False
    current_status: str | None = None