"""add core business indexes and contact submit_date

Revision ID: n123456789ab
Revises: c72a6f69e641
Create Date: 2026-06-29 14:00:00.000000
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = "n123456789ab"
down_revision: Union[str, None] = "c72a6f69e641"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # 1. Add submit_date column to contact_requests
    op.add_column(
        "contact_requests",
        sa.Column("submit_date", sa.String(10), nullable=True)
    )
    
    # Backfill submit_date from created_at for existing records
    op.execute(
        "UPDATE contact_requests SET submit_date = TO_CHAR(created_at AT TIME ZONE 'UTC', 'YYYY-MM-DD') WHERE submit_date IS NULL"
    )
    
    # Set NOT NULL after backfill
    op.alter_column("contact_requests", "submit_date", nullable=False)
    
    # Create index on submit_date
    op.create_index(
        "ix_contact_requests_submit_date",
        "contact_requests",
        ["submit_date"],
        unique=False,
    )

    # 2. Contact requests unique constraint: (user_id, submit_date)
    op.create_unique_constraint(
        "uq_contact_user_date",
        "contact_requests",
        ["user_id", "submit_date"],
    )

    # 3. Contact requests composite indexes
    op.create_index(
        "idx_contact_handled_created",
        "contact_requests",
        ["is_handled", "created_at"],
        unique=False,
    )
    op.create_index(
        "idx_contact_user_date_created",
        "contact_requests",
        ["user_id", "submit_date", "created_at"],
        unique=False,
    )

    # 4. Generation records composite indexes
    op.create_index(
        "idx_genrec_user_status_created",
        "generation_records",
        ["user_id", "status", "created_at"],
        unique=False,
    )
    op.create_index(
        "idx_genrec_project_status",
        "generation_records",
        ["project_id", "status"],
        unique=False,
    )

    # 5. Payment orders composite indexes
    op.create_index(
        "idx_payorder_user_status_created",
        "payment_orders",
        ["user_id", "status", "created_at"],
        unique=False,
    )
    op.create_index(
        "idx_payorder_status_created",
        "payment_orders",
        ["status", "created_at"],
        unique=False,
    )

    # 6. Upload task composite indexes
    op.create_index(
        "idx_upload_user_status_created",
        "upload_task",
        ["user_id", "status", "created_at"],
        unique=False,
    )
    op.create_index(
        "idx_upload_oauth_status",
        "upload_task",
        ["oauth_id", "status"],
        unique=False,
    )

    # 7. Menu configs indexes
    op.create_index(
        op.f("ix_menu_configs_parent_id"),
        "menu_configs",
        ["parent_id"],
        unique=False,
    )
    op.create_index(
        "idx_menu_target_active_sort",
        "menu_configs",
        ["menu_target", "is_active", "sort_order"],
        unique=False,
    )

    # 8. Operation logs composite indexes
    op.create_index(
        "idx_oplog_user_created",
        "operation_logs",
        ["user_id", "created_at"],
        unique=False,
    )
    op.create_index(
        "idx_oplog_created",
        "operation_logs",
        ["created_at"],
        unique=False,
    )

    # 9. Notification indexes (from previous optimization)
    op.create_index(
        "idx_notif_user_isread_created",
        "notifications",
        ["user_id", "is_read", "created_at"],
        unique=False,
    )

    # 10. Notification reads indexes
    op.create_index(
        "idx_notif_read_user_notif",
        "notification_reads",
        ["user_id", "notification_id"],
        unique=False,
    )
    op.create_unique_constraint(
        "uq_notif_read_user",
        "notification_reads",
        ["notification_id", "user_id"],
    )


def downgrade() -> None:
    op.drop_constraint("uq_notif_read_user", "notification_reads", type_="unique")
    op.drop_index("idx_notif_read_user_notif", table_name="notification_reads")
    op.drop_index("idx_notif_user_isread_created", table_name="notifications")
    op.drop_index("idx_oplog_created", table_name="operation_logs")
    op.drop_index("idx_oplog_user_created", table_name="operation_logs")
    op.drop_index("idx_menu_target_active_sort", table_name="menu_configs")
    op.drop_index(op.f("ix_menu_configs_parent_id"), table_name="menu_configs")
    op.drop_index("idx_upload_oauth_status", table_name="upload_task")
    op.drop_index("idx_upload_user_status_created", table_name="upload_task")
    op.drop_index("idx_payorder_status_created", table_name="payment_orders")
    op.drop_index("idx_payorder_user_status_created", table_name="payment_orders")
    op.drop_index("idx_genrec_project_status", table_name="generation_records")
    op.drop_index("idx_genrec_user_status_created", table_name="generation_records")
    op.drop_index("idx_contact_user_date_created", table_name="contact_requests")
    op.drop_index("idx_contact_handled_created", table_name="contact_requests")
    op.drop_constraint("uq_contact_user_date", "contact_requests", type_="unique")
    op.drop_index("ix_contact_requests_submit_date", table_name="contact_requests")
    op.drop_column("contact_requests", "submit_date")