"""Availability, shifts & working zones — Phase 10.3."""
from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import DateTime, Index, String, Text, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.types import JSON

from app.core.database import Base
from app.models.base import (
    ActorAuditMixin,
    OptimisticLockMixin,
    SoftDeleteMixin,
    TenantMixin,
    TimestampMixin,
    UUIDPrimaryKeyMixin,
)
from app.models.types import (
    DriverAvailabilityStatus,
    GUID,
    ShiftAssignmentStatus,
    ShiftStatus,
    WorkingZoneStatus,
)


class DriverAvailability(
    Base,
    UUIDPrimaryKeyMixin,
    TenantMixin,
    TimestampMixin,
    SoftDeleteMixin,
    ActorAuditMixin,
    OptimisticLockMixin,
):
    __tablename__ = "driver_availabilities"

    driver_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    status: Mapped[DriverAvailabilityStatus] = mapped_column(
        default=DriverAvailabilityStatus.OFFLINE, nullable=False
    )
    effective_from: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    effective_until: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
    metadata_json: Mapped[dict | None] = mapped_column(JSON, nullable=True)

    __table_args__ = (
        Index("ix_driver_availabilities_driver", "tenant_id", "driver_id"),
        Index("ix_driver_availabilities_tenant_deleted", "tenant_id", "is_deleted"),
    )


class Shift(
    Base,
    UUIDPrimaryKeyMixin,
    TenantMixin,
    TimestampMixin,
    SoftDeleteMixin,
    ActorAuditMixin,
    OptimisticLockMixin,
):
    __tablename__ = "shifts"

    organization_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    hub_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), nullable=True)
    code: Mapped[str] = mapped_column(String(50), nullable=False)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    status: Mapped[ShiftStatus] = mapped_column(
        default=ShiftStatus.DRAFT, nullable=False
    )
    starts_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    ends_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    metadata_json: Mapped[dict | None] = mapped_column(JSON, nullable=True)

    __table_args__ = (
        UniqueConstraint("tenant_id", "code", name="uq_shifts_tenant_code"),
        Index("ix_shifts_tenant_status", "tenant_id", "status"),
        Index("ix_shifts_tenant_deleted", "tenant_id", "is_deleted"),
    )


class ShiftAssignment(
    Base,
    UUIDPrimaryKeyMixin,
    TenantMixin,
    TimestampMixin,
    SoftDeleteMixin,
    ActorAuditMixin,
):
    __tablename__ = "shift_assignments"

    shift_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    driver_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    status: Mapped[ShiftAssignmentStatus] = mapped_column(
        default=ShiftAssignmentStatus.ASSIGNED, nullable=False
    )
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
    metadata_json: Mapped[dict | None] = mapped_column(JSON, nullable=True)

    __table_args__ = (
        UniqueConstraint(
            "tenant_id",
            "shift_id",
            "driver_id",
            name="uq_shift_assignments_tenant_shift_driver",
        ),
        Index("ix_shift_assignments_shift", "tenant_id", "shift_id"),
        Index("ix_shift_assignments_driver", "tenant_id", "driver_id"),
    )


class WorkingZone(
    Base,
    UUIDPrimaryKeyMixin,
    TenantMixin,
    TimestampMixin,
    SoftDeleteMixin,
    ActorAuditMixin,
    OptimisticLockMixin,
):
    __tablename__ = "working_zones"

    organization_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    code: Mapped[str] = mapped_column(String(50), nullable=False)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    status: Mapped[WorkingZoneStatus] = mapped_column(
        default=WorkingZoneStatus.ACTIVE, nullable=False
    )
    geo_boundary_ref: Mapped[str | None] = mapped_column(String(255), nullable=True)
    metadata_json: Mapped[dict | None] = mapped_column(JSON, nullable=True)

    __table_args__ = (
        UniqueConstraint("tenant_id", "code", name="uq_working_zones_tenant_code"),
        Index("ix_working_zones_tenant_status", "tenant_id", "status"),
        Index("ix_working_zones_tenant_deleted", "tenant_id", "is_deleted"),
    )