"""add human capacity overrides

Revision ID: 20260427_add_human_capacity_overrides
Revises: 20260426_add_pmflow_change_review_tables
Create Date: 2026-04-27
"""

from __future__ import annotations

from alembic import op
import sqlalchemy as sa

try:
    from sqlalchemy.dialects.postgresql import JSONB
except Exception:  # pragma: no cover
    JSONB = sa.JSON


revision = "20260427_add_human_capacity_overrides"
down_revision = "20260426_add_pmflow_change_review_tables"
branch_labels = None
depends_on = None


def _json_type(bind):
    return JSONB() if bind.dialect.name == "postgresql" else sa.JSON()


def _table_exists(bind, table_name: str) -> bool:
    return sa.inspect(bind).has_table(table_name)


def upgrade() -> None:
    bind = op.get_bind()
    json_type = _json_type(bind)

    if not _table_exists(bind, "human_capacity_overrides"):
        op.create_table(
            "human_capacity_overrides",
            sa.Column("id", sa.Integer(), primary_key=True, autoincrement=True),
            sa.Column("tenant_id", sa.BigInteger(), nullable=False),
            sa.Column("created_at", sa.TIMESTAMP(), server_default=sa.func.now(), nullable=False),
            sa.Column("updated_at", sa.TIMESTAMP(), server_default=sa.func.now(), nullable=False),
            sa.Column("project_id", sa.BigInteger(), sa.ForeignKey("projects.id"), nullable=False),
            sa.Column("user_id", sa.BigInteger(), sa.ForeignKey("users.id"), nullable=False),
            sa.Column("date", sa.Date(), nullable=False),
            sa.Column("override_type", sa.String(length=32), nullable=False),
            sa.Column("added_minutes", sa.Integer(), nullable=False, server_default="0"),
            sa.Column("overtime_type", sa.String(length=32), nullable=True),
            sa.Column("max_planned_utilization", sa.Float(), nullable=True),
            sa.Column("work_type_bias", json_type, nullable=False),
            sa.Column("high_risk_limit", sa.Integer(), nullable=True),
            sa.Column("reason", sa.Text(), nullable=False),
            sa.Column("expires_at", sa.TIMESTAMP(), nullable=False),
            sa.Column("created_by", sa.BigInteger(), sa.ForeignKey("users.id"), nullable=False),
        )
        op.create_index("ix_human_capacity_overrides_tenant_id", "human_capacity_overrides", ["tenant_id"], unique=False)
        op.create_index("ix_human_capacity_overrides_project_date", "human_capacity_overrides", ["project_id", "date"], unique=False)
        op.create_index("ix_human_capacity_overrides_user_date", "human_capacity_overrides", ["user_id", "date"], unique=False)
        op.create_index("ix_human_capacity_overrides_created_by", "human_capacity_overrides", ["created_by"], unique=False)


def downgrade() -> None:
    bind = op.get_bind()
    if _table_exists(bind, "human_capacity_overrides"):
        op.drop_index("ix_human_capacity_overrides_created_by", table_name="human_capacity_overrides")
        op.drop_index("ix_human_capacity_overrides_user_date", table_name="human_capacity_overrides")
        op.drop_index("ix_human_capacity_overrides_project_date", table_name="human_capacity_overrides")
        op.drop_index("ix_human_capacity_overrides_tenant_id", table_name="human_capacity_overrides")
        op.drop_table("human_capacity_overrides")