from __future__ import annotations

from datetime import datetime
from uuid import uuid4

from sqlalchemy import (
    DateTime,
    ForeignKey,
    Index,
    Integer,
    String,
    UniqueConstraint,
    JSON,
)
from sqlalchemy.orm import Mapped, mapped_column

from app.security.models import Base, utcnow

class Team(Base):
    __tablename__ = "teams"
    __table_args__ = (
        Index("ix_teams_workspace_id", "workspace_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow)

class TeamMember(Base):
    __tablename__ = "team_members"
    __table_args__ = (
        UniqueConstraint("team_id", "user_id", name="uq_team_member"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    team_id: Mapped[str] = mapped_column(String(36), ForeignKey("teams.id", ondelete="CASCADE"), nullable=False)
    user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    role: Mapped[str] = mapped_column(String(50), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)
class Invitation(Base):
    __tablename__ = "invitations"
    __table_args__ = (
        Index("ix_invitations_workspace_id", "workspace_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    email: Mapped[str] = mapped_column(String(255), nullable=False)
    role: Mapped[str] = mapped_column(String(50), nullable=False)
    status: Mapped[str] = mapped_column(String(20), nullable=False, default="pending")
    token_hash: Mapped[str | None] = mapped_column(String(255), nullable=True)
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
class ApprovalWorkflow(Base):
    __tablename__ = "approval_workflows"
    __table_args__ = (
        Index("ix_approval_workflows_project_id", "project_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    project_id: Mapped[str] = mapped_column(String(36), ForeignKey("projects.id", ondelete="CASCADE"), nullable=False)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)

class ApprovalRequest(Base):
    __tablename__ = "approval_requests"
    __table_args__ = (
        Index("ix_approval_requests_workflow_id", "workflow_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    workflow_id: Mapped[str] = mapped_column(String(36), ForeignKey("approval_workflows.id", ondelete="CASCADE"), nullable=False)
    project_id: Mapped[str] = mapped_column(String(36), ForeignKey("projects.id", ondelete="CASCADE"), nullable=False)
    editor_revision: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
    status: Mapped[str] = mapped_column(String(20), nullable=False, default="pending")
    created_by: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)

class ReviewComment(Base):
    __tablename__ = "review_comments"
    __table_args__ = (
        Index("ix_review_comments_request_id", "request_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    request_id: Mapped[str] = mapped_column(String(36), ForeignKey("approval_requests.id", ondelete="CASCADE"), nullable=False)
    user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    content: Mapped[str] = mapped_column(String(2000), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)


class ProjectCollaborator(Base):
    __tablename__ = "project_collaborators"
    __table_args__ = (
        UniqueConstraint("project_id", "user_id", name="uq_project_collaborators_project_user"),
        Index("ix_project_collaborators_project_id", "project_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    project_id: Mapped[str] = mapped_column(String(36), ForeignKey("projects.id", ondelete="CASCADE"), nullable=False)
    user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    role: Mapped[str] = mapped_column(String(50), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)


class CollaborationActivity(Base):
    __tablename__ = "collaboration_activity"
    __table_args__ = (
        Index("ix_collaboration_activity_workspace_id", "workspace_id"),
    )

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid4()))
    workspace_id: Mapped[str] = mapped_column(String(36), ForeignKey("workspaces.id", ondelete="CASCADE"), nullable=False)
    user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    action: Mapped[str] = mapped_column(String(100), nullable=False)
    entity_id: Mapped[str] = mapped_column(String(36), nullable=False)
    entity_type: Mapped[str] = mapped_column(String(50), nullable=False)
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=utcnow)