"""add prompt replay runs

Revision ID: 20260430_add_prompt_replay_runs
Revises: 20260429_add_prompt_quality_linkage
Create Date: 2026-04-30
"""

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 = "20260430_add_prompt_replay_runs"
down_revision = "20260429_add_prompt_quality_linkage"
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 _index_exists(bind, table_name: str, index_name: str) -> bool:
    if not _table_exists(bind, table_name):
        return False
    return index_name in {str(index.get("name") or "") for index in sa.inspect(bind).get_indexes(table_name)}


def upgrade() -> None:
    bind = op.get_bind()
    if not _table_exists(bind, "prompt_replay_runs"):
        op.create_table(
            "prompt_replay_runs",
            sa.Column("id", sa.Integer(), primary_key=True, autoincrement=True),
            sa.Column("tenant_id", sa.BigInteger(), nullable=False),
            sa.Column("prompt_key", sa.String(length=128), nullable=False),
            sa.Column("release_id", sa.Integer(), nullable=False),
            sa.Column("baseline_release_id", sa.Integer(), nullable=True),
            sa.Column("run_status", sa.String(length=24), nullable=False, server_default="pending"),
            sa.Column("run_mode", sa.String(length=32), nullable=False, server_default="contract_smoke"),
            sa.Column("case_count", sa.Integer(), nullable=False, server_default="0"),
            sa.Column("passed_count", sa.Integer(), nullable=False, server_default="0"),
            sa.Column("failed_count", sa.Integer(), nullable=False, server_default="0"),
            sa.Column("warning_count", sa.Integer(), nullable=False, server_default="0"),
            sa.Column("score_delta", sa.Float(), nullable=True),
            sa.Column("summary", sa.Text(), nullable=True),
            sa.Column("risk_flags_json", _json_type(bind), nullable=True),
            sa.Column("created_by", sa.BigInteger(), nullable=True),
            sa.Column("started_at", sa.String(length=64), nullable=True),
            sa.Column("completed_at", sa.String(length=64), nullable=True),
            sa.Column("created_at", sa.TIMESTAMP(), nullable=False, server_default=sa.func.now()),
            sa.Column("updated_at", sa.TIMESTAMP(), nullable=False, server_default=sa.func.now()),
            sa.ForeignKeyConstraint(["release_id"], ["prompt_releases.id"], ondelete="CASCADE"),
        )
        for index_name, column_names in (
            ("ix_prompt_replay_runs_tenant_id", ["tenant_id"]),
            ("ix_prompt_replay_runs_prompt_key", ["prompt_key"]),
            ("ix_prompt_replay_runs_release_id", ["release_id"]),
            ("ix_prompt_replay_runs_baseline_release_id", ["baseline_release_id"]),
            ("ix_prompt_replay_runs_run_status", ["run_status"]),
            ("ix_prompt_replay_runs_run_mode", ["run_mode"]),
            ("ix_prompt_replay_runs_created_by", ["created_by"]),
        ):
            op.create_index(index_name, "prompt_replay_runs", column_names, unique=False)

    if not _table_exists(bind, "prompt_replay_case_results"):
        op.create_table(
            "prompt_replay_case_results",
            sa.Column("id", sa.Integer(), primary_key=True, autoincrement=True),
            sa.Column("tenant_id", sa.BigInteger(), nullable=False),
            sa.Column("run_id", sa.Integer(), nullable=False),
            sa.Column("golden_case_id", sa.Integer(), nullable=False),
            sa.Column("prompt_key", sa.String(length=128), nullable=False),
            sa.Column("release_id", sa.Integer(), nullable=False),
            sa.Column("baseline_output", sa.Text(), nullable=True),
            sa.Column("candidate_output", sa.Text(), nullable=True),
            sa.Column("status", sa.String(length=24), nullable=False),
            sa.Column("contract_result_json", _json_type(bind), nullable=True),
            sa.Column("diff_summary", sa.Text(), nullable=True),
            sa.Column("risk_flags_json", _json_type(bind), nullable=True),
            sa.Column("latency_ms", sa.Integer(), nullable=True),
            sa.Column("estimated_cost", sa.Float(), nullable=True),
            sa.Column("error_summary", sa.Text(), nullable=True),
            sa.Column("created_at", sa.TIMESTAMP(), nullable=False, server_default=sa.func.now()),
            sa.Column("updated_at", sa.TIMESTAMP(), nullable=False, server_default=sa.func.now()),
            sa.ForeignKeyConstraint(["run_id"], ["prompt_replay_runs.id"], ondelete="CASCADE"),
            sa.ForeignKeyConstraint(["golden_case_id"], ["prompt_golden_cases.id"], ondelete="CASCADE"),
        )
        for index_name, column_names in (
            ("ix_prompt_replay_case_results_tenant_id", ["tenant_id"]),
            ("ix_prompt_replay_case_results_run_id", ["run_id"]),
            ("ix_prompt_replay_case_results_golden_case_id", ["golden_case_id"]),
            ("ix_prompt_replay_case_results_prompt_key", ["prompt_key"]),
            ("ix_prompt_replay_case_results_release_id", ["release_id"]),
            ("ix_prompt_replay_case_results_status", ["status"]),
        ):
            op.create_index(index_name, "prompt_replay_case_results", column_names, unique=False)


def downgrade() -> None:
    bind = op.get_bind()
    if _table_exists(bind, "prompt_replay_case_results"):
        for index_name in (
            "ix_prompt_replay_case_results_status",
            "ix_prompt_replay_case_results_release_id",
            "ix_prompt_replay_case_results_prompt_key",
            "ix_prompt_replay_case_results_golden_case_id",
            "ix_prompt_replay_case_results_run_id",
            "ix_prompt_replay_case_results_tenant_id",
        ):
            if _index_exists(bind, "prompt_replay_case_results", index_name):
                op.drop_index(index_name, table_name="prompt_replay_case_results")
        op.drop_table("prompt_replay_case_results")
    if _table_exists(bind, "prompt_replay_runs"):
        for index_name in (
            "ix_prompt_replay_runs_created_by",
            "ix_prompt_replay_runs_run_mode",
            "ix_prompt_replay_runs_run_status",
            "ix_prompt_replay_runs_baseline_release_id",
            "ix_prompt_replay_runs_release_id",
            "ix_prompt_replay_runs_prompt_key",
            "ix_prompt_replay_runs_tenant_id",
        ):
            if _index_exists(bind, "prompt_replay_runs", index_name):
                op.drop_index(index_name, table_name="prompt_replay_runs")
        op.drop_table("prompt_replay_runs")