"""message reliability tables

Revision ID: 0002_message_reliability_tables
Revises: 0001_initial_schema
Create Date: 2026-03-08 01:30:00.000000
"""

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op


revision: str = "0002_message_reliability_tables"
down_revision: Union[str, Sequence[str], None] = "0001_initial_schema"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "message_idempotency_keys",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column("chat_id", sa.Integer(), nullable=False),
        sa.Column("sender_id", sa.Integer(), nullable=False),
        sa.Column("client_message_id", sa.String(length=64), nullable=False),
        sa.Column("message_id", sa.Integer(), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.ForeignKeyConstraint(["chat_id"], ["chats.id"], name=op.f("fk_message_idempotency_keys_chat_id_chats"), ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["sender_id"], ["users.id"], name=op.f("fk_message_idempotency_keys_sender_id_users"), ondelete="CASCADE"),
        sa.ForeignKeyConstraint(
            ["message_id"],
            ["messages.id"],
            name=op.f("fk_message_idempotency_keys_message_id_messages"),
            ondelete="CASCADE",
        ),
        sa.PrimaryKeyConstraint("id", name=op.f("pk_message_idempotency_keys")),
        sa.UniqueConstraint("chat_id", "sender_id", "client_message_id", name="uq_msg_idem_chat_sender_client"),
    )
    op.create_index(op.f("ix_message_idempotency_keys_id"), "message_idempotency_keys", ["id"], unique=False)
    op.create_index(op.f("ix_message_idempotency_keys_chat_id"), "message_idempotency_keys", ["chat_id"], unique=False)
    op.create_index(
        op.f("ix_message_idempotency_keys_sender_id"),
        "message_idempotency_keys",
        ["sender_id"],
        unique=False,
    )
    op.create_index(
        op.f("ix_message_idempotency_keys_message_id"),
        "message_idempotency_keys",
        ["message_id"],
        unique=False,
    )

    op.create_table(
        "message_receipts",
        sa.Column("id", sa.Integer(), nullable=False),
        sa.Column("chat_id", sa.Integer(), nullable=False),
        sa.Column("user_id", sa.Integer(), nullable=False),
        sa.Column("last_delivered_message_id", sa.Integer(), nullable=True),
        sa.Column("last_read_message_id", sa.Integer(), nullable=True),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.ForeignKeyConstraint(["chat_id"], ["chats.id"], name=op.f("fk_message_receipts_chat_id_chats"), ondelete="CASCADE"),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], name=op.f("fk_message_receipts_user_id_users"), ondelete="CASCADE"),
        sa.PrimaryKeyConstraint("id", name=op.f("pk_message_receipts")),
        sa.UniqueConstraint("chat_id", "user_id", name="uq_msg_receipts_chat_user"),
    )
    op.create_index(op.f("ix_message_receipts_id"), "message_receipts", ["id"], unique=False)
    op.create_index(op.f("ix_message_receipts_chat_id"), "message_receipts", ["chat_id"], unique=False)
    op.create_index(op.f("ix_message_receipts_user_id"), "message_receipts", ["user_id"], unique=False)


def downgrade() -> None:
    op.drop_index(op.f("ix_message_receipts_user_id"), table_name="message_receipts")
    op.drop_index(op.f("ix_message_receipts_chat_id"), table_name="message_receipts")
    op.drop_index(op.f("ix_message_receipts_id"), table_name="message_receipts")
    op.drop_table("message_receipts")

    op.drop_index(op.f("ix_message_idempotency_keys_message_id"), table_name="message_idempotency_keys")
    op.drop_index(op.f("ix_message_idempotency_keys_sender_id"), table_name="message_idempotency_keys")
    op.drop_index(op.f("ix_message_idempotency_keys_chat_id"), table_name="message_idempotency_keys")
    op.drop_index(op.f("ix_message_idempotency_keys_id"), table_name="message_idempotency_keys")
    op.drop_table("message_idempotency_keys")