"""Routing & optimization aggregates — Phase 10.6."""
from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import DateTime, Index, Integer, 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 GUID, OptimizationRunStatus, RoutePlanStatus, RouteStopStatus


class RoutePlan(
    Base,
    UUIDPrimaryKeyMixin,
    TenantMixin,
    TimestampMixin,
    SoftDeleteMixin,
    ActorAuditMixin,
    OptimisticLockMixin,
):
    __tablename__ = "route_plans"

    organization_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    code: Mapped[str] = mapped_column(String(50), nullable=False)
    status: Mapped[RoutePlanStatus] = mapped_column(
        default=RoutePlanStatus.DRAFT, nullable=False
    )
    driver_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), nullable=True)
    dispatch_job_ids: Mapped[list | None] = mapped_column(JSON, nullable=True)
    routing_engine_ref: Mapped[str | None] = mapped_column(String(255), nullable=True)
    planned_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    metadata_json: Mapped[dict | None] = mapped_column(JSON, nullable=True)

    __table_args__ = (
        UniqueConstraint("tenant_id", "code", name="uq_route_plans_tenant_code"),
        Index("ix_route_plans_tenant_status", "tenant_id", "status"),
        Index("ix_route_plans_tenant_deleted", "tenant_id", "is_deleted"),
    )


class RouteStop(
    Base,
    UUIDPrimaryKeyMixin,
    TenantMixin,
    TimestampMixin,
    SoftDeleteMixin,
    ActorAuditMixin,
):
    __tablename__ = "route_stops"

    route_plan_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    sequence: Mapped[int] = mapped_column(Integer, nullable=False)
    status: Mapped[RouteStopStatus] = mapped_column(
        default=RouteStopStatus.PENDING, nullable=False
    )
    address_ref: Mapped[str | None] = mapped_column(String(255), nullable=True)
    external_order_ref: Mapped[str | None] = mapped_column(String(255), 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_route_stops_plan", "tenant_id", "route_plan_id"),
        Index("ix_route_stops_tenant_deleted", "tenant_id", "is_deleted"),
    )


class OptimizationRun(
    Base,
    UUIDPrimaryKeyMixin,
    TenantMixin,
    TimestampMixin,
    SoftDeleteMixin,
    ActorAuditMixin,
):
    """External routing via RoutingEngineProvider protocol refs only."""

    __tablename__ = "optimization_runs"

    route_plan_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), nullable=True)
    status: Mapped[OptimizationRunStatus] = mapped_column(
        default=OptimizationRunStatus.PENDING, nullable=False
    )
    routing_engine_ref: Mapped[str | None] = mapped_column(String(255), nullable=True)
    request_payload: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    result_payload: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    started_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    completed_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)

    __table_args__ = (
        Index("ix_optimization_runs_tenant_status", "tenant_id", "status"),
        Index("ix_optimization_runs_plan", "tenant_id", "route_plan_id"),
    )