"""trust & safety: reports, moderation_actions, appeals + user role/ban/suspend

Revision ID: 0003_trust_safety
Revises: 0002_add_date_of_birth_to_users
Create Date: 2025-01-01 00:00:00.000000

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql

# revision identifiers, used by Alembic.
revision: str = "0003_trust_safety"
down_revision: Union[str, None] = "0002_add_date_of_birth_to_users"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Create trust & safety tables and extend users table."""
    bind = op.get_bind()

    # ── ENUM types ──────────────────────────────────────────────────────

    # user_role
    user_role = postgresql.ENUM("user", "moderator", "admin", name="user_role")
    user_role.create(bind, checkfirst=True)

    # report_target_type
    report_target_type = postgresql.ENUM(
        "user", "world", "asset", "chat_message", name="report_target_type"
    )
    report_target_type.create(bind, checkfirst=True)

    # reason_category
    reason_category = postgresql.ENUM(
        "harassment",
        "hate_speech",
        "sexual_content",
        "violence",
        "spam",
        "self_harm",
        "other",
        name="reason_category",
    )
    reason_category.create(bind, checkfirst=True)

    # report_status
    report_status = postgresql.ENUM(
        "open", "in_review", "resolved", "dismissed", name="report_status"
    )
    report_status.create(bind, checkfirst=True)

    # resolution
    resolution_enum = postgresql.ENUM(
        "action_taken", "no_action", "false_positive", name="resolution"
    )
    resolution_enum.create(bind, checkfirst=True)

    # moderation_action_type
    moderation_action_type = postgresql.ENUM(
        "warn", "suspend", "ban", "restrict", "remove", "restore",
        name="moderation_action_type",
    )
    moderation_action_type.create(bind, checkfirst=True)

    # moderation_target_type
    moderation_target_type = postgresql.ENUM(
        "user", "world", "asset", "chat_message", name="moderation_target_type"
    )
    moderation_target_type.create(bind, checkfirst=True)

    # appeal_status
    appeal_status = postgresql.ENUM(
        "pending", "approved", "rejected", name="appeal_status"
    )
    appeal_status.create(bind, checkfirst=True)

    # ── Extend users table ──────────────────────────────────────────────

    op.add_column(
        "users",
        sa.Column(
            "role",
            postgresql.ENUM("user", "moderator", "admin", name="user_role"),
            nullable=False,
            server_default="user",
        ),
    )
    op.add_column(
        "users",
        sa.Column("banned_until", sa.DateTime(timezone=True), nullable=True),
    )
    op.add_column(
        "users",
        sa.Column("suspended_until", sa.DateTime(timezone=True), nullable=True),
    )

    # ── reports table ───────────────────────────────────────────────────

    op.create_table(
        "reports",
        sa.Column("id", sa.BigInteger(), primary_key=True, autoincrement=True),
        sa.Column("reporter_id", sa.Integer(), nullable=False),
        sa.Column(
            "target_type",
            postgresql.ENUM(
                "user", "world", "asset", "chat_message", name="report_target_type"
            ),
            nullable=False,
        ),
        sa.Column("target_id", sa.String(length=64), nullable=False),
        sa.Column(
            "reason_category",
            postgresql.ENUM(
                "harassment",
                "hate_speech",
                "sexual_content",
                "violence",
                "spam",
                "self_harm",
                "other",
                name="reason_category",
            ),
            nullable=False,
        ),
        sa.Column(
            "details", sa.Text(), nullable=True,
        ),
        sa.Column(
            "status",
            postgresql.ENUM(
                "open", "in_review", "resolved", "dismissed", name="report_status"
            ),
            nullable=False,
            server_default="open",
        ),
        sa.Column("resolved_by", sa.Integer(), nullable=True),
        sa.Column(
            "resolution",
            postgresql.ENUM(
                "action_taken", "no_action", "false_positive", name="resolution"
            ),
            nullable=True,
        ),
        sa.Column("resolved_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            onupdate=sa.func.now(),
            nullable=True,
        ),
        sa.ForeignKeyConstraint(["reporter_id"], ["users.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["resolved_by"], ["users.id"], ondelete="SET NULL"),
        sa.UniqueConstraint(
            "reporter_id", "target_type", "target_id",
            name="uq_reporter_target",
        ),
    )
    op.create_index(op.f("ix_reports_id"), "reports", ["id"], unique=False)
    op.create_index(
        op.f("ix_reports_reporter_id"), "reports", ["reporter_id"], unique=False
    )
    op.create_index(
        op.f("ix_reports_status"), "reports", ["status"], unique=False
    )

    # ── moderation_actions table ────────────────────────────────────────

    op.create_table(
        "moderation_actions",
        sa.Column("id", sa.BigInteger(), primary_key=True, autoincrement=True),
        sa.Column("moderator_id", sa.Integer(), nullable=False),
        sa.Column("target_user_id", sa.Integer(), nullable=True),
        sa.Column(
            "target_type",
            postgresql.ENUM(
                "user", "world", "asset", "chat_message",
                name="moderation_target_type",
            ),
            nullable=False,
        ),
        sa.Column("target_id", sa.String(length=64), nullable=True),
        sa.Column(
            "action",
            postgresql.ENUM(
                "warn", "suspend", "ban", "restrict", "remove", "restore",
                name="moderation_action_type",
            ),
            nullable=False,
        ),
        sa.Column("reason", sa.Text(), nullable=True),
        sa.Column("report_id", sa.Integer(), nullable=True),
        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("revoked_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
        sa.ForeignKeyConstraint(["moderator_id"], ["users.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(
            ["target_user_id"], ["users.id"], ondelete="CASCADE"
        ),
        sa.ForeignKeyConstraint(["report_id"], ["reports.id"], ondelete="SET NULL"),
    )
    op.create_index(
        op.f("ix_moderation_actions_id"),
        "moderation_actions",
        ["id"],
        unique=False,
    )
    op.create_index(
        op.f("ix_moderation_actions_moderator_id"),
        "moderation_actions",
        ["moderator_id"],
        unique=False,
    )
    op.create_index(
        op.f("ix_moderation_actions_target_user_id"),
        "moderation_actions",
        ["target_user_id"],
        unique=False,
    )
    op.create_index(
        op.f("ix_moderation_actions_report_id"),
        "moderation_actions",
        ["report_id"],
        unique=False,
    )

    # ── appeals table ───────────────────────────────────────────────────

    op.create_table(
        "appeals",
        sa.Column("id", sa.BigInteger(), primary_key=True, autoincrement=True),
        sa.Column(
            "moderation_action_id", sa.Integer(), nullable=False
        ),
        sa.Column("user_id", sa.Integer(), nullable=False),
        sa.Column("reason", sa.Text(), nullable=False),
        sa.Column(
            "status",
            postgresql.ENUM(
                "pending", "approved", "rejected", name="appeal_status"
            ),
            nullable=False,
            server_default="pending",
        ),
        sa.Column("reviewed_by", sa.Integer(), nullable=True),
        sa.Column("reviewed_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
        sa.ForeignKeyConstraint(
            ["moderation_action_id"],
            ["moderation_actions.id"],
            ondelete="CASCADE",
        ),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
        sa.ForeignKeyConstraint(
            ["reviewed_by"], ["users.id"], ondelete="SET NULL"
        ),
    )
    op.create_index(op.f("ix_appeals_id"), "appeals", ["id"], unique=False)
    op.create_index(
        op.f("ix_appeals_moderation_action_id"),
        "appeals",
        ["moderation_action_id"],
        unique=False,
    )
    op.create_index(
        op.f("ix_appeals_user_id"),
        "appeals",
        ["user_id"],
        unique=False,
    )
    op.create_index(
        op.f("ix_appeals_status"),
        "appeals",
        ["status"],
        unique=False,
    )


def downgrade() -> None:
    """Remove trust & safety tables and revert users table."""
    op.drop_index(op.f("ix_appeals_status"), table_name="appeals")
    op.drop_index(op.f("ix_appeals_user_id"), table_name="appeals")
    op.drop_index(op.f("ix_appeals_moderation_action_id"), table_name="appeals")
    op.drop_index(op.f("ix_appeals_id"), table_name="appeals")
    op.drop_table("appeals")

    op.drop_index(op.f("ix_moderation_actions_report_id"), table_name="moderation_actions")
    op.drop_index(op.f("ix_moderation_actions_target_user_id"), table_name="moderation_actions")
    op.drop_index(op.f("ix_moderation_actions_moderator_id"), table_name="moderation_actions")
    op.drop_index(op.f("ix_moderation_actions_id"), table_name="moderation_actions")
    op.drop_table("moderation_actions")

    op.drop_index(op.f("ix_reports_status"), table_name="reports")
    op.drop_index(op.f("ix_reports_reporter_id"), table_name="reports")
    op.drop_index(op.f("ix_reports_id"), table_name="reports")
    op.drop_table("reports")

    op.drop_column("users", "suspended_until")
    op.drop_column("users", "banned_until")
    op.drop_column("users", "role")

    # Drop ENUM types
    postgresql.ENUM(name="appeal_status").drop(bind, checkfirst=True)
    postgresql.ENUM(name="moderation_target_type").drop(bind, checkfirst=True)
    postgresql.ENUM(name="moderation_action_type").drop(bind, checkfirst=True)
    postgresql.ENUM(name="resolution").drop(bind, checkfirst=True)
    postgresql.ENUM(name="report_status").drop(bind, checkfirst=True)
    postgresql.ENUM(name="reason_category").drop(bind, checkfirst=True)
    postgresql.ENUM(name="report_target_type").drop(bind, checkfirst=True)
    postgresql.ENUM(name="user_role").drop(bind, checkfirst=True)