import enum
import uuid
from datetime import datetime

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

from api.models.base import Base, TimestampMixin, new_uuid


class ContributionType(str, enum.Enum):
    br = "br"
    fr = "fr"
    ep = "ep"
    upr = "upr"


class ContributionStatus(str, enum.Enum):
    draft = "draft"
    submitted = "submitted"
    acknowledged = "acknowledged"
    accepted = "accepted"
    rejected = "rejected"
    merged = "merged"
    withdrawn = "withdrawn"


class Contribution(Base, TimestampMixin):
    __tablename__ = "contributions"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=new_uuid
    )
    type: Mapped[ContributionType] = mapped_column(
        Enum(ContributionType, name="contributiontype"), nullable=False
    )
    target_org: Mapped[str | None] = mapped_column(String(200), nullable=True)
    target_repo: Mapped[str | None] = mapped_column(String(200), nullable=True)
    slug: Mapped[str | None] = mapped_column(String(200), nullable=True)
    title: Mapped[str] = mapped_column(String(500), nullable=False)
    status: Mapped[ContributionStatus] = mapped_column(
        Enum(ContributionStatus, name="contributionstatus"),
        nullable=False, default=ContributionStatus.draft,
    )
    body_path: Mapped[str | None] = mapped_column(Text, nullable=True)
    related_topic_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("topics.id", ondelete="SET NULL"), nullable=True
    )
    related_workstream_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("workstreams.id", ondelete="SET NULL"), nullable=True
    )
    repo_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True), ForeignKey("managed_repos.id", ondelete="SET NULL"), nullable=True
    )
    submitted_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    resolved_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)

    topic: Mapped["Topic"] = relationship("Topic", lazy="selectin")  # noqa: F821
    workstream: Mapped["Workstream"] = relationship("Workstream", lazy="selectin")  # noqa: F821
    repo: Mapped["ManagedRepo"] = relationship("ManagedRepo", lazy="selectin")  # noqa: F821