"""
Visit Model — ORM + Pydantic Schemas

ORM:     Visit (SQLAlchemy table: visits)
Schemas: VisitCreate, VisitUpdate, VisitResponse, VisitListResponse

Enhanced for Ghost Shopper program:
- outlet_id:      Links to the coffee-shop outlet being evaluated
- ghost_shopper:  Name / initials of the Ghost Shopper
- visit_type:     dine_in, take_away, drive_thru, delivery
- comments:       Ghost Shopper comments (Komentar)
- suggestions:    Ghost Shopper suggestions (Saran)
"""

import uuid
from datetime import datetime
from typing import Optional

from sqlalchemy import String, Text, DateTime, ForeignKey, func
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from pydantic import BaseModel, Field, ConfigDict

from models.base import Base


# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
# ORM Model
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

class Visit(Base):
    """SQLAlchemy ORM model for the 'visits' table."""

    __tablename__ = "visits"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    location: Mapped[Optional[str]] = mapped_column(String(255), nullable=True)
    visit_date: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    status: Mapped[str] = mapped_column(
        String(50), nullable=False, default="pending"
    )

    # ── Ghost Shopper fields (nullable for backward compatibility) ──
    outlet_id: Mapped[Optional[uuid.UUID]] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("outlets.id", ondelete="SET NULL"),
        nullable=True,
    )
    ghost_shopper: Mapped[Optional[str]] = mapped_column(
        String(255), nullable=True,
        comment="Ghost Shopper name or initials"
    )
    visit_type: Mapped[Optional[str]] = mapped_column(
        String(50), nullable=True,
        comment="dine_in, take_away, drive_thru, delivery"
    )
    comments: Mapped[Optional[str]] = mapped_column(
        Text, nullable=True,
        comment="Ghost Shopper Komentar"
    )
    suggestions: Mapped[Optional[str]] = mapped_column(
        Text, nullable=True,
        comment="Ghost Shopper Saran"
    )

    created_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now()
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), onupdate=func.now()
    )

    # Relationships
    outlet = relationship("Outlet", back_populates="visits")
    checklists = relationship(
        "Checklist", back_populates="visit", cascade="all, delete-orphan"
    )
    photos = relationship(
        "Photo", back_populates="visit", cascade="all, delete-orphan"
    )
    assessments = relationship(
        "Assessment", back_populates="visit", cascade="all, delete-orphan"
    )

    def __repr__(self) -> str:
        return f"<Visit(id={self.id}, title='{self.title}', status='{self.status}')>"


# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
# Pydantic Schemas (Request / Response)
# ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

class VisitCreate(BaseModel):
    """Schema for creating a new visit."""
    title: str = Field(..., min_length=1, max_length=255, description="Visit title")
    description: Optional[str] = Field(None, description="Visit description")
    location: Optional[str] = Field(None, max_length=255, description="Visit location")
    visit_date: datetime = Field(..., description="Scheduled visit date & time")
    status: Optional[str] = Field("pending", description="Visit status")
    outlet_id: Optional[uuid.UUID] = Field(None, description="Outlet UUID")
    ghost_shopper: Optional[str] = Field(None, max_length=255, description="Ghost Shopper name")
    visit_type: Optional[str] = Field(None, max_length=50, description="dine_in, take_away, etc.")
    comments: Optional[str] = Field(None, description="Komentar")
    suggestions: Optional[str] = Field(None, description="Saran")


class VisitUpdate(BaseModel):
    """Schema for updating an existing visit (all fields optional)."""
    title: Optional[str] = Field(None, min_length=1, max_length=255)
    description: Optional[str] = None
    location: Optional[str] = Field(None, max_length=255)
    visit_date: Optional[datetime] = None
    status: Optional[str] = Field(None, max_length=50)
    outlet_id: Optional[uuid.UUID] = None
    ghost_shopper: Optional[str] = Field(None, max_length=255)
    visit_type: Optional[str] = Field(None, max_length=50)
    comments: Optional[str] = None
    suggestions: Optional[str] = None


class VisitResponse(BaseModel):
    """Schema for a single visit in API responses."""
    model_config = ConfigDict(from_attributes=True)

    id: uuid.UUID
    title: str
    description: Optional[str]
    location: Optional[str]
    visit_date: datetime
    status: str
    outlet_id: Optional[uuid.UUID]
    ghost_shopper: Optional[str]
    visit_type: Optional[str]
    comments: Optional[str]
    suggestions: Optional[str]
    created_at: datetime
    updated_at: datetime


class VisitListResponse(BaseModel):
    """Schema for paginated visit list."""
    status: str = "success"
    data: list[VisitResponse]
    meta: dict