from datetime import datetime, timezone
from unittest.mock import MagicMock

import pytest
from openpyxl import load_workbook

from app.native.wndb import s42_sensor_placement
from app.services import sensor_placement


def _mock_project_cursor(monkeypatch):
    cursor = MagicMock()
    connection = MagicMock()
    connection.cursor.return_value.__enter__.return_value = cursor
    connection_context = MagicMock()
    connection_context.__enter__.return_value = connection
    monkeypatch.setattr(
        s42_sensor_placement,
        "project_connection",
        lambda _network: connection_context,
    )
    return cursor


def test_build_workbook_contains_engineering_columns(monkeypatch):
    monkeypatch.setattr(
        sensor_placement,
        "_sensor_points",
        lambda network, locations: [
            {
                "node_id": "J1",
                "project_x": 13500000.0,
                "project_y": 3600000.0,
                "map_x": 13500000.0,
                "map_y": 3600000.0,
                "longitude": 121.0,
                "latitude": 31.0,
                "elevation": 4.5,
            }
        ],
    )
    scheme = {
        "id": 7,
        "scheme_name": "北区测压点",
        "sensor_number": 2,
        "min_diameter": 300,
        "username": "alice",
        "create_time": datetime(2026, 7, 30, tzinfo=timezone.utc),
        "sensor_location": ["J1", "J2"],
    }

    output = sensor_placement.build_sensor_placement_workbook(
        network="tjwater",
        scheme=scheme,
        sensor_location=["J1"],
        adjustment_status={"J1": "replaced"},
    )
    workbook = load_workbook(output)

    assert workbook.sheetnames == ["方案信息", "监测点清单"]
    headers = [cell.value for cell in workbook["监测点清单"][1]]
    assert headers == [
        "序号",
        "节点 ID",
        "经度",
        "纬度",
        "工程 X",
        "工程 Y",
        "地图 X",
        "地图 Y",
        "高程",
        "调整状态",
    ]
    assert workbook["监测点清单"]["J2"].value == "替换"
    assert workbook["方案信息"]["B8"].value == "未保存草稿"


def test_sensor_points_keep_engineering_coordinates_and_transform_map_coordinates(
    monkeypatch,
):
    monkeypatch.setattr(
        sensor_placement.wndb,
        "get_sensor_placement_nodes",
        lambda network, node_ids: [
            {
                "node_id": "J1",
                "project_x": 3038.94,
                "project_y": -34446.59,
                "map_x": 13525191.530279,
                "map_y": 3622984.760237,
                "elevation": 4.5,
            }
        ],
    )

    point = sensor_placement._sensor_points("tjwater", ["J1"])[0]

    assert point["project_x"] == 3038.94
    assert point["project_y"] == -34446.59
    assert point["longitude"] == pytest.approx(121.498863, abs=1e-6)
    assert point["latitude"] == pytest.approx(30.924784, abs=1e-6)


def test_update_validates_nodes_before_write(monkeypatch):
    monkeypatch.setattr(
        sensor_placement.wndb,
        "get_sensor_placement_nodes",
        lambda network, node_ids: [],
    )

    try:
        sensor_placement.update_sensor_placement_scheme(
            "tjwater",
            7,
            expected_sensor_location=["J1"],
            sensor_location=["missing"],
        )
    except sensor_placement.SensorPlacementValidationError as exc:
        assert "missing" in str(exc)
    else:
        raise AssertionError("expected invalid node to be rejected")


def test_sensor_nodes_use_materialized_web_mercator_geometry(monkeypatch):
    cursor = _mock_project_cursor(monkeypatch)
    cursor.fetchall.return_value = []

    s42_sensor_placement.get_sensor_placement_nodes("tjwater", ["J1"])

    query = cursor.execute.call_args.args[0]
    assert "geo_junctions_mat" in query
    assert "ST_X(c.coord)" in query
    assert "ST_Y(c.coord)" in query
    assert "ST_X(gj.geom)" in query
    assert "ST_Y(gj.geom)" in query


def test_workbook_escapes_formula_in_scheme_metadata(monkeypatch):
    monkeypatch.setattr(
        sensor_placement,
        "_sensor_points",
        lambda network, locations: [
            {
                "node_id": "J1",
                "project_x": 3038.94,
                "project_y": -34446.59,
                "map_x": 13525191.53,
                "map_y": 3622984.76,
                "longitude": 121.49,
                "latitude": 30.92,
                "elevation": 4.5,
            }
        ],
    )
    output = sensor_placement.build_sensor_placement_workbook(
        network="tjwater",
        scheme={
            "scheme_name": "=1+1",
            "sensor_location": ["J1"],
            "min_diameter": 300,
            "username": "alice",
            "create_time": datetime(2026, 7, 30, tzinfo=timezone.utc),
        },
        sensor_location=["J1"],
        adjustment_status={},
    )

    workbook = load_workbook(output, data_only=False)
    assert workbook["方案信息"]["B2"].value == "'=1+1"
    assert workbook["方案信息"]["B2"].data_type == "s"


def test_create_sensor_placement_returns_inserted_record(monkeypatch):
    cursor = _mock_project_cursor(monkeypatch)
    cursor.fetchone.return_value = {"id": 7, "sensor_location": ["J1", "J2"]}

    created = s42_sensor_placement.create_sensor_placement(
        "tjwater",
        scheme_name="北区测压点",
        min_diameter=300,
        username="alice",
        sensor_location=["J1", "J2"],
    )

    assert created["id"] == 7
    query, parameters = cursor.execute.call_args.args
    assert "INSERT INTO sensor_placement" in query
    assert parameters == ("北区测压点", 2, 300, "alice", ["J1", "J2"])