from datetime import datetime
from typing import Optional

from sqlalchemy import Column, Integer, String, Text, ForeignKey, DateTime
from sqlalchemy.dialects.postgresql import ENUM
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
import enum

from app.database import Base


class TargetType(str, enum.Enum):
    USER = "user"
    WORLD = "world"
    ASSET = "asset"
    CHAT_MESSAGE = "chat_message"


class ReasonCategory(str, enum.Enum):
    HARASSMENT = "harassment"
    HATE_SPEECH = "hate_speech"
    SEXUAL_CONTENT = "sexual_content"
    VIOLENCE = "violence"
    SPAM = "spam"
    SELF_HARM = "self_harm"
    OTHER = "other"


class ReportStatus(str, enum.Enum):
    OPEN = "open"
    IN_REVIEW = "in_review"
    RESOLVED = "resolved"
    DISMISSED = "dismissed"


class Resolution(str, enum.Enum):
    ACTION_TAKEN = "action_taken"
    DISMISSED = "dismissed"
    NO_VIOLATION = "no_violation"


class ActionType(str, enum.Enum):
    WARN = "warn"
    SUSPEND = "suspend"
    BAN = "ban"
    RESTRICT = "restrict"
    REMOVE = "remove"
    RESTORE = "restore"


class AppealStatus(str, enum.Enum):
    PENDING = "pending"
    APPROVED = "approved"
    REJECTED = "rejected"


class Report(Base):
    __tablename__ = "reports"

    id = Column(Integer, primary_key=True, index=True)
    reporter_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    target_type = Column(
        ENUM(TargetType, name="target_type", create_type=False),
        nullable=False,
    )
    target_id = Column(String(64), nullable=False)
    reason_category = Column(
        ENUM(ReasonCategory, name="reason_category", create_type=False),
        nullable=False,
    )
    details = Column(Text, nullable=True)
    status = Column(
        ENUM(ReportStatus, name="report_status", create_type=False),
        default=ReportStatus.OPEN,
        nullable=False,
    )
    resolved_by = Column(Integer, ForeignKey("users.id", ondelete="SET NULL"), nullable=True)
    resolution = Column(
        ENUM(Resolution, name="resolution", create_type=False),
        nullable=True,
    )
    resolved_at = Column(DateTime(timezone=True), nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())

    reporter = relationship("User", foreign_keys=[reporter_id])
    resolved_by_user = relationship("User", foreign_keys=[resolved_by])
    moderation_actions = relationship("ModerationAction", back_populates="report")


class ModerationAction(Base):
    __tablename__ = "moderation_actions"

    id = Column(Integer, primary_key=True, index=True)
    moderator_id = Column(Integer, ForeignKey("users.id", ondelete="SET NULL"), nullable=False)
    target_user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    target_type = Column(
        ENUM(TargetType, name="target_type", create_type=False),
        nullable=False,
    )
    target_id = Column(String(64), nullable=False)
    action = Column(
        ENUM(ActionType, name="action_type", create_type=False),
        nullable=False,
    )
    reason = Column(Text, nullable=True)
    report_id = Column(Integer, ForeignKey("reports.id", ondelete="SET NULL"), nullable=True)
    expires_at = Column(DateTime(timezone=True), nullable=True)
    revoked_at = Column(DateTime(timezone=True), nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    moderator = relationship("User", foreign_keys=[moderator_id])
    target_user = relationship("User", foreign_keys=[target_user_id])
    report = relationship("Report", back_populates="moderation_actions")
    appeals = relationship("Appeal", back_populates="moderation_action")


class Appeal(Base):
    __tablename__ = "appeals"

    id = Column(Integer, primary_key=True, index=True)
    moderation_action_id = Column(Integer, ForeignKey("moderation_actions.id", ondelete="CASCADE"), nullable=False)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    reason = Column(Text, nullable=False)
    status = Column(
        ENUM(AppealStatus, name="appeal_status", create_type=False),
        default=AppealStatus.PENDING,
        nullable=False,
    )
    reviewed_by = Column(Integer, ForeignKey("users.id", ondelete="SET NULL"), nullable=True)
    reviewed_at = Column(DateTime(timezone=True), nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    moderation_action = relationship("ModerationAction", back_populates="appeals")
    user = relationship("User", foreign_keys=[user_id])
    reviewed_by_user = relationship("User", foreign_keys=[reviewed_by])