"""Модель Milestone-платежей (Upwork-style)."""

import uuid
from datetime import datetime, timezone

from sqlalchemy import Column, DateTime, Enum, Float, ForeignKey, func
from sqlalchemy.dialects.postgresql import UUID as PG_UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.core.database import Base


class Milestone(Base):
    __tablename__ = "milestones"

    id: Mapped[uuid.UUID] = mapped_column(PG_UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    project_id: Mapped[uuid.UUID] = mapped_column(PG_UUID(as_uuid=True), ForeignKey("projects.id"), nullable=False)
    escrow_transaction_id: Mapped[uuid.UUID | None] = mapped_column(PG_UUID(as_uuid=True), ForeignKey("escrow_transactions.id"))
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    amount: Mapped[float] = mapped_column(Float(precision=10, scale=2), nullable=False)
    status: Mapped[str] = mapped_column(Enum("pending", "funded", "in_progress", "submitted", "approved", "disputed"), default="pending")
    due_date: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    submitted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    approved_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())