"""trust & safety schema

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."""
    # ── ENUM types ──────────────────────────────────────────────

    # role enum for users table
    user_role = postgresql.ENUM(
        "user", "moderator", "admin", name="user_role", create_type=True
    )
    user_role.create(op.get_bind(), checkfirst=True)

    # report target_type enum
    report_target_type = postgresql.ENUM(
        "user", "world", "asset", "chat_message",
        name="report_target_type", create_type=True,
    )
    report_target_type.create(op.get_bind(), checkfirst=True)

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

    # report status enum
    report_status = postgresql.ENUM(
        "open", "in_review", "resolved", "dismissed",
        name="report_status", create_type=True,
    )
    report_status.create(op.get_bind(), checkfirst=True)

    # resolution enum
    resolution_enum = postgresql.ENUM(
        "action_taken", "no_action", "false_positive",
        name="resolution", create_type=True,
    )
    resolution_enum.create(op.get_bind(), checkfirst=True)

    # moderation action enum
    moderation_action = postgresql.ENUM(
        "warn", "suspend", "ban", "restrict", "remove", "restore",
        name="moderation_action", create_type=True,
    )
    moderation_action.create(op.get_bind(), checkfirst=True)

    # moderation target_type enum
    mod_target_type = postgresql.ENUM(
        "user", "world", "asset", "chat_message",
        name="moderation_target_type", create_type=True,
    )
    mod_target_type.create(op.get_bind(), checkfirst=True)

    # appeal status enum
    appeal_status = postgresql.ENUM(
        "pending", "approved", "rejected",
        name="appeal_status", create_type=True,
    )
    appeal_status.create(op.get_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(), sa.ForeignKey("users.id"), 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(), sa.ForeignKey("users.id"), 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.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(), sa.ForeignKey("users.id"), nullable=False),
        sa.Column("target_user_id", sa.Integer(), sa.ForeignKey("users.id"), 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",
            ),
            nullable=False,
        ),
        sa.Column("reason", sa.Text(), nullable=True),
        sa.Column("report_id", sa.Integer(), sa.ForeignKey("reports.id"), 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,
        ),
    )
    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(),
            sa.ForeignKey("moderation_actions.id"),
            nullable=False,
        ),
        sa.Column("user_id", sa.Integer(), sa.ForeignKey("users.id"), 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(), sa.ForeignKey("users.id"), 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,
        ),
    )
    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:
    """Drop trust & safety tables and revert users table."""
    # Drop indexes first
    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")

    # Remove columns from users table
    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(op.get_bind(), checkfirst=True)
    postgresql.ENUM(name="moderation_target_type").drop(op.get_bind(), checkfirst=True)
    postgresql.ENUM(name="moderation_action").drop(op.get_bind(), checkfirst=True)
    postgresql.ENUM(name="resolution").drop(op.get_bind(), checkfirst=True)
    postgresql.ENUM(name="report_status").drop(op.get_bind(), checkfirst=True)
    postgresql.ENUM(name="reason_category").drop(op.get_bind(), checkfirst=True)
    postgresql.ENUM(name="report_target_type").drop(op.get_bind(), checkfirst=True)
    postgresql.ENUM(name="user_role").drop(op.get_bind(), checkfirst=True)