from typing import Any, Dict, cast

import pytest
from fastapi.testclient import TestClient

from models.scenario import Scenario
from services import settings as settings_service


def test_dashboard_route_provides_summary(
    api_client: TestClient, seeded_ui_data: Dict[str, Any]
) -> None:
    response = api_client.get("/ui/dashboard")
    assert response.status_code == 200

    template = getattr(response, "template", None)
    assert template is not None
    assert template.name == "Dashboard.html"

    context = cast(Dict[str, Any], getattr(response, "context", {}))
    assert context.get("report_available") is True

    metric_labels = {item["label"] for item in context["summary_metrics"]}
    assert {
        "CAPEX Total",
        "OPEX Total",
        "Production",
        "Simulation Iterations",
    }.issubset(metric_labels)

    scenario = cast(Scenario, seeded_ui_data["scenario"])
    scenario_row = next(
        row
        for row in context["scenario_rows"]
        if row["scenario_name"] == scenario.name
    )
    assert scenario_row["iterations"] == 3
    assert scenario_row["simulation_mean_display"] == "971,666.67"
    assert scenario_row["capex_display"] == "$1,000,000.00"
    assert scenario_row["opex_display"] == "$250,000.00"
    assert scenario_row["production_display"] == "800.00"
    assert scenario_row["consumption_display"] == "1,200.00"


def test_scenarios_route_lists_seeded_scenario(
    api_client: TestClient, seeded_ui_data: Dict[str, Any]
) -> None:
    response = api_client.get("/ui/scenarios")
    assert response.status_code == 200

    template = getattr(response, "template", None)
    assert template is not None
    assert template.name == "ScenarioForm.html"

    context = cast(Dict[str, Any], getattr(response, "context", {}))
    names = [item["name"] for item in context["scenarios"]]
    scenario = cast(Scenario, seeded_ui_data["scenario"])
    assert scenario.name in names


def test_reporting_route_includes_summary(
    api_client: TestClient, seeded_ui_data: Dict[str, Any]
) -> None:
    response = api_client.get("/ui/reporting")
    assert response.status_code == 200

    template = getattr(response, "template", None)
    assert template is not None
    assert template.name == "reporting.html"

    context = cast(Dict[str, Any], getattr(response, "context", {}))
    summaries = context["report_summaries"]
    scenario = cast(Scenario, seeded_ui_data["scenario"])
    scenario_summary = next(
        item for item in summaries if item["scenario_id"] == scenario.id
    )
    assert scenario_summary["iterations"] == 3
    mean_value = float(scenario_summary["summary"]["mean"])
    assert abs(mean_value - 971_666.6666666666) < 1e-6


def test_dashboard_data_endpoint_returns_aggregates(
    api_client: TestClient, seeded_ui_data: Dict[str, Any]
) -> None:
    response = api_client.get("/ui/dashboard/data")
    assert response.status_code == 200

    payload = response.json()
    assert payload["report_available"] is True

    metric_map = {
        item["label"]: item["value"] for item in payload["summary_metrics"]
    }
    assert metric_map["CAPEX Total"].startswith("$")
    assert metric_map["Maintenance Cost"].startswith("$")

    scenario = cast(Scenario, seeded_ui_data["scenario"])
    scenario_rows = payload["scenario_rows"]
    scenario_entry = next(
        row for row in scenario_rows if row["scenario_name"] == scenario.name
    )
    assert scenario_entry["capex_display"] == "$1,000,000.00"
    assert scenario_entry["production_display"] == "800.00"

    labels = payload["scenario_cost_chart"]["labels"]
    idx = labels.index(scenario.name)
    assert payload["scenario_cost_chart"]["capex"][idx] == 1_000_000.0

    activity_labels = payload["scenario_activity_chart"]["labels"]
    activity_idx = activity_labels.index(scenario.name)
    assert (
        payload["scenario_activity_chart"]["production"][activity_idx] == 800.0
    )


@pytest.mark.parametrize(
    ("path", "template_name"),
    [
        ("/", "Dashboard.html"),
        ("/ui/parameters", "ParameterInput.html"),
        ("/ui/costs", "costs.html"),
        ("/ui/consumption", "consumption.html"),
        ("/ui/production", "production.html"),
        ("/ui/equipment", "equipment.html"),
        ("/ui/maintenance", "maintenance.html"),
        ("/ui/simulations", "simulations.html"),
    ],
)
def test_additional_ui_routes_render_templates(
    api_client: TestClient,
    seeded_ui_data: Dict[str, Any],
    path: str,
    template_name: str,
) -> None:
    response = api_client.get(path)
    assert response.status_code == 200

    template = getattr(response, "template", None)
    assert template is not None
    assert template.name == template_name

    context = cast(Dict[str, Any], getattr(response, "context", {}))
    assert context


def test_settings_route_provides_css_context(
    api_client: TestClient,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    env_var = settings_service.css_key_to_env_var("--color-accent")
    monkeypatch.setenv(env_var, "#abcdef")

    response = api_client.get("/ui/settings")
    assert response.status_code == 200

    template = getattr(response, "template", None)
    assert template is not None
    assert template.name == "settings.html"

    context = cast(Dict[str, Any], getattr(response, "context", {}))
    assert "css_variables" in context
    assert "css_defaults" in context
    assert "css_env_overrides" in context
    assert "css_env_override_rows" in context
    assert "css_env_override_meta" in context

    assert context["css_variables"]["--color-accent"] == "#abcdef"
    assert (
        context["css_defaults"]["--color-accent"]
        == settings_service.CSS_COLOR_DEFAULTS["--color-accent"]
    )
    assert context["css_env_overrides"]["--color-accent"] == "#abcdef"

    override_rows = context["css_env_override_rows"]
    assert any(row["env_var"] == env_var for row in override_rows)

    meta = context["css_env_override_meta"]["--color-accent"]
    assert meta["value"] == "#abcdef"
    assert meta["env_var"] == env_var