from pathlib import Path

from fastapi.testclient import TestClient

from tests.conftest import build_test_app, install_stub, load_module_from_path


def _load_simulation_module(monkeypatch):
    install_stub(monkeypatch, "app.services", package=True)
    install_stub(
        monkeypatch,
        "app.services.simulation",
        {"run_simulation": lambda **kwargs: None},
    )
    install_stub(monkeypatch, "app.services.globals", {})
    install_stub(
        monkeypatch,
        "app.services.tjnetwork",
        {
            "run_project": lambda network: "report",
            "run_project_return_dict": lambda network: {"output": {}, "report": "ok"},
            "run_inp": lambda network: "inp-report",
            "dump_output": lambda output: f"dump::{output}",
        },
    )
    install_stub(monkeypatch, "app.algorithms", package=True)
    install_stub(monkeypatch, "app.algorithms.simulation", package=True)
    install_stub(
        monkeypatch,
        "app.algorithms.simulation.scenarios",
        {
            "burst_analysis": lambda *args, **kwargs: "burst",
            "valve_close_analysis": lambda *args, **kwargs: "valve",
            "flushing_analysis": lambda *args, **kwargs: "flush",
            "contaminant_simulation": lambda *args, **kwargs: "contaminant",
            "age_analysis": lambda *args, **kwargs: "age",
            "pressure_regulation": lambda *args, **kwargs: "pressure",
        },
    )
    install_stub(
        monkeypatch,
        "app.algorithms.sensor",
        {
            "pressure_sensor_placement_sensitivity": lambda *args, **kwargs: [],
            "pressure_sensor_placement_kmeans": lambda *args, **kwargs: [],
        },
    )
    install_stub(
        monkeypatch,
        "app.services.network_import",
        {"network_update": lambda *args, **kwargs: "updated"},
    )
    install_stub(
        monkeypatch,
        "app.services.simulation_ops",
        {
            "project_management": lambda *args, **kwargs: "managed",
            "scheduling_simulation": lambda *args, **kwargs: "scheduled",
            "daily_scheduling_simulation": lambda *args, **kwargs: "daily",
        },
    )
    install_stub(
        monkeypatch,
        "app.services.valve_isolation",
        {"analyze_valve_isolation": lambda *args, **kwargs: {}},
    )
    return load_module_from_path(
        "tests_simulation_endpoints_module",
        "app/api/v1/endpoints/simulation.py",
    )


def test_run_project_endpoint_returns_plain_text(monkeypatch):
    module = _load_simulation_module(monkeypatch)
    monkeypatch.setattr(module, "run_project", lambda network: f"report::{network}")
    client = TestClient(build_test_app(module.router, "/api/v1"))

    response = client.get("/api/v1/runproject/", params={"network": "demo"})

    assert response.status_code == 200
    assert response.text == "report::demo"


def test_scheduling_analysis_maps_request_body(monkeypatch):
    module = _load_simulation_module(monkeypatch)
    captured = {}

    def fake_schedule(network, start_time, pump_control, tank_id, water_plant_output_id, time_delta):
        captured["args"] = (
            network,
            start_time,
            pump_control,
            tank_id,
            water_plant_output_id,
            time_delta,
        )
        return "scheduled"

    monkeypatch.setattr(module, "scheduling_simulation", fake_schedule)
    client = TestClient(build_test_app(module.router, "/api/v1"))

    response = client.post(
        "/api/v1/scheduling_analysis/",
        json={
            "network": "demo",
            "start_time": "2025-01-01T08:00:00+08:00",
            "pump_control": {"P1": [1, 0, 1]},
            "tank_id": "T1",
            "water_plant_output_id": "R1",
        },
    )

    assert response.status_code == 200
    assert response.json() == "scheduled"
    assert captured["args"] == (
        "demo",
        "2025-01-01T08:00:00+08:00",
        {"P1": [1, 0, 1]},
        "T1",
        "R1",
        300,
    )


def test_project_management_maps_named_arguments(monkeypatch):
    module = _load_simulation_module(monkeypatch)
    captured = {}

    def fake_project_management(**kwargs):
        captured.update(kwargs)
        return "managed"

    monkeypatch.setattr(module, "project_management", fake_project_management)
    client = TestClient(build_test_app(module.router, "/api/v1"))

    response = client.post(
        "/api/v1/project_management/",
        json={
            "network": "demo",
            "start_time": "2025-01-01T08:00:00+08:00",
            "pump_control": {"P1": [1]},
            "tank_init_level": {"T1": 10.0},
            "region_demand": {"R1": 20.0},
        },
    )

    assert response.status_code == 200
    assert response.json() == "managed"
    assert captured == {
        "prj_name": "demo",
        "start_datetime": "2025-01-01T08:00:00+08:00",
        "pump_control": {"P1": [1]},
        "tank_initial_level_control": {"T1": 10.0},
        "region_demand_control": {"R1": 20.0},
    }


def test_network_update_surfaces_service_error(monkeypatch, tmp_path):
    module = _load_simulation_module(monkeypatch)
    monkeypatch.chdir(tmp_path)

    def boom(_path):
        raise RuntimeError("write failed")

    monkeypatch.setattr(module, "network_update", boom)
    client = TestClient(build_test_app(module.router, "/api/v1"))

    response = client.post(
        "/api/v1/network_update/",
        files={"file": ("update.txt", b"payload")},
    )

    assert response.status_code == 500
    assert "数据库操作失败: write failed" in response.json()["detail"]
    assert list(Path(tmp_path).glob("network_update_*"))