"""remove legacy finance contracts

Revision ID: 20260527_03
Revises: 20260527_02
Create Date: 2026-05-27 10:25:00.000000

"""

from typing import Sequence, Union

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


revision: str = "20260527_03"
down_revision: Union[str, None] = "20260527_02"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None

LEGACY_KEYS = (
    "finance_contracts:create",
    "finance_contracts:list",
    "finance_contracts:read",
    "finance_contracts:update",
    "finance_contracts:delete",
    "fees_payments:create",
    "fees_payments:update",
    "fees_payments:delete",
    "fees_attachments:create",
    "fees_attachments:read",
    "fees_attachments:delete",
)


def _table_exists(inspector: sa.Inspector, table_name: str) -> bool:
    return table_name in inspector.get_table_names()


def upgrade() -> None:
    bind = op.get_bind()
    inspector = sa.inspect(bind)

    if _table_exists(inspector, "finance_contracts") and _table_exists(inspector, "contract_fees"):
        op.execute(
            """
            UPDATE contract_fees cf
            SET
                contract_no = COALESCE(cf.contract_no, legacy.contract_no),
                signed_date = COALESCE(cf.signed_date, legacy.signed_date),
                currency = COALESCE(NULLIF(cf.currency, ''), legacy.currency, 'CNY'),
                remark = COALESCE(cf.remark, legacy.remark)
            FROM (
                SELECT DISTINCT ON (fc.study_id, s.id)
                    fc.study_id,
                    s.id AS center_id,
                    fc.contract_no,
                    fc.signed_date,
                    fc.currency,
                    fc.remark
                FROM finance_contracts fc
                JOIN sites s
                    ON s.study_id = fc.study_id
                   AND s.name = fc.site_name
                ORDER BY fc.study_id, s.id, fc.updated_at DESC, fc.created_at DESC
            ) legacy
            WHERE cf.project_id = legacy.study_id
              AND cf.center_id = legacy.center_id
            """
        )

    if _table_exists(inspector, "api_endpoint_permissions"):
        quoted_keys = ", ".join(f"'{key}'" for key in LEGACY_KEYS)
        op.execute(f"DELETE FROM api_endpoint_permissions WHERE endpoint_key IN ({quoted_keys})")

    if _table_exists(inspector, "permission_templates"):
        for key in LEGACY_KEYS:
            op.execute(f"UPDATE permission_templates SET permissions = permissions::jsonb #- '{{PM,{key}}}'")
            op.execute(f"UPDATE permission_templates SET permissions = permissions::jsonb #- '{{CRA,{key}}}'")
            op.execute(f"UPDATE permission_templates SET permissions = permissions::jsonb #- '{{PV,{key}}}'")
            op.execute(f"UPDATE permission_templates SET permissions = permissions::jsonb #- '{{QA,{key}}}'")
            op.execute(f"UPDATE permission_templates SET permissions = permissions::jsonb #- '{{CTA,{key}}}'")

    if _table_exists(inspector, "permission_template_versions"):
        for key in LEGACY_KEYS:
            op.execute(f"UPDATE permission_template_versions SET permissions = permissions::jsonb #- '{{PM,{key}}}'")
            op.execute(f"UPDATE permission_template_versions SET permissions = permissions::jsonb #- '{{CRA,{key}}}'")
            op.execute(f"UPDATE permission_template_versions SET permissions = permissions::jsonb #- '{{PV,{key}}}'")
            op.execute(f"UPDATE permission_template_versions SET permissions = permissions::jsonb #- '{{QA,{key}}}'")
            op.execute(f"UPDATE permission_template_versions SET permissions = permissions::jsonb #- '{{CTA,{key}}}'")

    if _table_exists(inspector, "attachments"):
        op.execute("DELETE FROM attachments WHERE entity_type = 'finance_contract'")

    if _table_exists(inspector, "audit_logs"):
        op.execute("DELETE FROM audit_logs WHERE entity_type = 'finance_contract'")

    if _table_exists(inspector, "finance_contracts"):
        op.drop_table("finance_contracts")


def downgrade() -> None:
    bind = op.get_bind()
    inspector = sa.inspect(bind)

    if not _table_exists(inspector, "finance_contracts"):
        op.create_table(
            "finance_contracts",
            sa.Column("id", postgresql.UUID(as_uuid=True), nullable=False),
            sa.Column("study_id", postgresql.UUID(as_uuid=True), nullable=False),
            sa.Column("site_name", sa.String(length=255), nullable=False),
            sa.Column("contract_no", sa.String(length=100), nullable=False),
            sa.Column("signed_date", sa.Date(), nullable=True),
            sa.Column("amount", sa.Numeric(12, 2), nullable=False),
            sa.Column("currency", sa.String(length=10), nullable=False),
            sa.Column("remark", sa.Text(), nullable=True),
            sa.Column("created_by", postgresql.UUID(as_uuid=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), server_default=sa.func.now(), nullable=False),
            sa.ForeignKeyConstraint(["created_by"], ["users.id"]),
            sa.ForeignKeyConstraint(["study_id"], ["studies.id"]),
            sa.PrimaryKeyConstraint("id"),
        )
        op.create_index("ix_finance_contracts_study_id", "finance_contracts", ["study_id"])