"""Persistence transaction tests for selection runs."""

from datetime import date
from decimal import Decimal

import psycopg
import pytest
from psycopg.types.json import Jsonb

from zhixing_server.modules.selection.domain.models import SelectionSignal, ZhixingB1Category
from zhixing_server.modules.selection.domain.runs import (
    SelectionExecutionSource,
    SelectionRerunRequired,
    SelectionRunInProgress,
    SelectionRunItem,
    SelectionStock,
)
from zhixing_server.modules.selection.domain.zhixing_b1 import ZHIXING_B1_SIGNAL_ORDER
from zhixing_server.modules.selection.infrastructure.postgres_runs import (
    PostgresSelectionRunRepository,
)

TARGET = date(2026, 8, 8)


class FakeResult:
    def __init__(self, row: tuple[object, ...] | None = None) -> None:
        self.row = row

    def fetchone(self) -> tuple[object, ...] | None:
        return self.row


class FakeTransaction:
    def __enter__(self) -> "FakeTransaction":
        return self

    def __exit__(self, *args: object) -> None:
        return None


class FakeConnection:
    def __init__(self, existing: tuple[object, ...] | None) -> None:
        self.existing = existing
        self.statements: list[tuple[str, tuple[object, ...]]] = []

    def __enter__(self) -> "FakeConnection":
        return self

    def __exit__(self, *args: object) -> None:
        return None

    def transaction(self) -> FakeTransaction:
        return FakeTransaction()

    def execute(self, query: str, parameters: tuple[object, ...]) -> FakeResult:
        self.statements.append((query, parameters))
        if "SELECT id, status" in query:
            return FakeResult(self.existing)
        return FakeResult()


def _source() -> SelectionExecutionSource:
    return SelectionExecutionSource(
        market_sync_batch_id="market-run-1",
        target_trade_date=TARGET,
        target_count=1,
        valid_count=1,
        coverage=Decimal("1"),
        stocks=(SelectionStock("000001.SZ", "平安银行"),),
    )


def _repository(
    monkeypatch: pytest.MonkeyPatch,
    connection: FakeConnection,
) -> PostgresSelectionRunRepository:
    def connect(database_url: str) -> FakeConnection:
        assert database_url == "postgresql://test"
        return connection

    monkeypatch.setattr(psycopg, "connect", connect)
    return PostgresSelectionRunRepository("postgresql://test")


def test_prepare_claims_new_business_key(monkeypatch: pytest.MonkeyPatch) -> None:
    connection = FakeConnection(None)
    run = _repository(monkeypatch, connection).prepare_run(
        "zhixing_b1",
        TARGET,
        _source(),
        rerun=False,
    )

    assert run.status == "running"
    assert run.target_trade_date == TARGET
    assert any("INSERT INTO selection_run" in query for query, _ in connection.statements)
    assert not any("DELETE FROM selection_run" in query for query, _ in connection.statements)


def test_prepare_requires_confirmation_for_terminal_run(monkeypatch: pytest.MonkeyPatch) -> None:
    connection = FakeConnection(("old-run", "success"))
    repository = _repository(monkeypatch, connection)

    with pytest.raises(SelectionRerunRequired):
        repository.prepare_run("zhixing_b1", TARGET, _source(), rerun=False)

    assert not any("DELETE FROM selection_run" in query for query, _ in connection.statements)


def test_prepare_rejects_duplicate_running_run(monkeypatch: pytest.MonkeyPatch) -> None:
    connection = FakeConnection(("old-run", "running"))
    repository = _repository(monkeypatch, connection)

    with pytest.raises(SelectionRunInProgress):
        repository.prepare_run("zhixing_b1", TARGET, _source(), rerun=True)


def test_prepare_rerun_deletes_old_result_before_insert(monkeypatch: pytest.MonkeyPatch) -> None:
    connection = FakeConnection(("old-run", "failed"))
    run = _repository(monkeypatch, connection).prepare_run(
        "zhixing_b1",
        TARGET,
        _source(),
        rerun=True,
    )

    statements = [query for query, _ in connection.statements]
    assert "DELETE FROM selection_run WHERE strategy = %s AND target_trade_date = %s" in statements
    assert run.id != "old-run"


def test_record_item_persists_independent_signals_as_jsonb(monkeypatch: pytest.MonkeyPatch) -> None:
    connection = FakeConnection(None)
    repository = _repository(monkeypatch, connection)
    signal = SelectionSignal(
        ts_code="000001.SZ",
        name="平安银行",
        target_trade_date=TARGET,
        strategy="zhixing_b1",
        category=ZhixingB1Category.ORIGINAL_B1,
        close=10.5,
        details={"j": 12.0},
    )

    repository.record_item(
        "run-1",
        SelectionRunItem(
            ts_code="000001.SZ",
            name="平安银行",
            status="selected",
            signal_count=1,
            signals=(signal,),
        ),
    )

    signal_insert = next(
        parameters
        for query, parameters in connection.statements
        if "INSERT INTO selection_signal" in query
    )
    assert isinstance(signal_insert[-1], Jsonb)


class LoadConnection:
    def __enter__(self) -> "LoadConnection":
        return self

    def __exit__(self, *args: object) -> None:
        return None

    def execute(self, query: str, parameters: tuple[object, ...]) -> "LoadResult":
        if "FROM selection_run\n" in query:
            return LoadResult(
                row=(
                    "run-1",
                    "zhixing_b1",
                    TARGET,
                    "market-run-1",
                    "success",
                    1,
                    1,
                    1,
                    1,
                    2,
                    0,
                    Decimal("1"),
                    None,
                    None,
                    None,
                    None,
                )
            )
        if "FROM selection_run_item" in query:
            return LoadResult(rows=[("000001.SZ", "平安银行", "selected", 2, None)])
        return LoadResult(
            rows=[
                (
                    "000001.SZ",
                    "平安银行",
                    TARGET,
                    "zhixing_b1",
                    ZHIXING_B1_SIGNAL_ORDER[-1].value,
                    Decimal("10.5"),
                    {},
                ),
                (
                    "000001.SZ",
                    "平安银行",
                    TARGET,
                    "zhixing_b1",
                    ZHIXING_B1_SIGNAL_ORDER[0].value,
                    Decimal("10.5"),
                    {},
                ),
            ]
        )


class LoadResult:
    def __init__(
        self,
        *,
        row: tuple[object, ...] | None = None,
        rows: list[tuple[object, ...]] | None = None,
    ) -> None:
        self.row = row
        self.rows = rows or []

    def fetchone(self) -> tuple[object, ...] | None:
        return self.row

    def fetchall(self) -> list[tuple[object, ...]]:
        return self.rows


def test_get_run_orders_signals_by_formula_priority(monkeypatch: pytest.MonkeyPatch) -> None:
    connection = LoadConnection()

    def connect(database_url: str) -> LoadConnection:
        assert database_url == "postgresql://test"
        return connection

    monkeypatch.setattr(psycopg, "connect", connect)
    run = PostgresSelectionRunRepository("postgresql://test").get_run("run-1")

    assert run is not None
    assert [signal.category for signal in run.signals] == [
        ZHIXING_B1_SIGNAL_ORDER[0],
        ZHIXING_B1_SIGNAL_ORDER[-1],
    ]