"""Acceptance tests for the optional Home Assistant integration.

Groups:
  1. HA disabled — regression guard (uses default client/seeded_client fixtures)
  2. HomeAssistantClient unit tests — mock requests.get, no Flask required
  3. Poller integration — uses ha_app fixture, calls _poll_once() directly
  4. Dashboard/device/battery UI — checks rendered HTML with HA enabled
"""

import os
import tempfile
from unittest.mock import MagicMock, patch

import pytest


# ---------------------------------------------------------------------------
# HA-enabled app fixture
# ---------------------------------------------------------------------------

@pytest.fixture()
def ha_app():
    """Flask app with Home Assistant enabled (HOMEASSISTANT_URL set).

    The poller is started but its first fire is after 300 s — it never fires
    during a test run.
    """
    db_fd, db_path = tempfile.mkstemp(suffix=".db")
    os.close(db_fd)

    class HaTestConfig:
        SQLALCHEMY_DATABASE_URI = f"sqlite:///{db_path}"
        SECRET_KEY = "test-secret"
        SQLALCHEMY_TRACK_MODIFICATIONS = False
        TESTING = True
        WTF_CSRF_ENABLED = False      # disable CSRF validation in tests
        HOMEASSISTANT_URL = "http://ha.test:8123"
        HOMEASSISTANT_API_KEY = "fake-token"
        HOMEASSISTANT_POLL_INTERVAL = 300

    from app import create_app
    flask_app = create_app(HaTestConfig)
    yield flask_app
    os.unlink(db_path)


@pytest.fixture()
def ha_client_f(ha_app):
    """Test client bound to the HA-enabled app."""
    with ha_app.test_client() as c:
        yield c


# ---------------------------------------------------------------------------
# Group 1 — HA disabled (regression guard)
# ---------------------------------------------------------------------------

def test_ha_disabled_dashboard_no_ha_column(client):
    resp = client.get("/")
    assert resp.status_code == 200
    assert b"ha-pct" not in resp.data


def test_ha_disabled_device_no_ha_field(client):
    client.post("/device/add", data={"name": "Dev A", "battery_slots": "1"})
    resp = client.get("/device/1")
    assert resp.status_code == 200
    assert b"ha_entity_id" not in resp.data


def test_ha_disabled_battery_detail_still_has_percentage_field(client):
    """battery_percentage edit field is always shown regardless of HA config."""
    client.post("/battery/add", data={"brand": "X", "count": "1"})
    resp = client.get("/battery/1")
    assert b"battery_percentage" in resp.data


# ---------------------------------------------------------------------------
# Group 2 — HomeAssistantClient unit tests
# ---------------------------------------------------------------------------

def test_ha_client_disabled_when_no_url():
    from ha_client import HomeAssistantClient
    c = HomeAssistantClient(None, None)
    assert c.enabled is False
    assert c.get_state("sensor.foo") is None


def test_ha_client_disabled_when_no_key():
    from ha_client import HomeAssistantClient
    c = HomeAssistantClient("http://ha.local", None)
    assert c.enabled is False


def test_ha_client_returns_integer_state():
    from ha_client import HomeAssistantClient
    mock_resp = MagicMock()
    mock_resp.json.return_value = {"state": "85", "entity_id": "sensor.foo"}
    mock_resp.raise_for_status.return_value = None

    with patch("ha_client.requests.get", return_value=mock_resp) as mock_get:
        c = HomeAssistantClient("http://ha.local:8123", "tok")
        result = c.get_state("sensor.foo")

    assert result == 85
    mock_get.assert_called_once_with(
        "http://ha.local:8123/api/states/sensor.foo",
        headers={"Authorization": "Bearer tok"},
        timeout=10,
    )


def test_ha_client_handles_float_state():
    from ha_client import HomeAssistantClient
    mock_resp = MagicMock()
    mock_resp.json.return_value = {"state": "72.6"}
    mock_resp.raise_for_status.return_value = None

    with patch("ha_client.requests.get", return_value=mock_resp):
        c = HomeAssistantClient("http://ha.local", "tok")
        assert c.get_state("sensor.x") == 72


def test_ha_client_returns_none_on_network_error():
    from ha_client import HomeAssistantClient
    import requests as req
    with patch("ha_client.requests.get", side_effect=req.RequestException("timeout")):
        c = HomeAssistantClient("http://ha.local", "tok")
        assert c.get_state("sensor.x") is None


def test_ha_client_returns_none_on_non_numeric_state():
    from ha_client import HomeAssistantClient
    mock_resp = MagicMock()
    mock_resp.json.return_value = {"state": "unavailable"}
    mock_resp.raise_for_status.return_value = None

    with patch("ha_client.requests.get", return_value=mock_resp):
        c = HomeAssistantClient("http://ha.local", "tok")
        assert c.get_state("sensor.x") is None


# ---------------------------------------------------------------------------
# Group 3 — Poller integration
# ---------------------------------------------------------------------------

def _make_session_factory(ha_app):
    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker
    engine = create_engine(ha_app.config["SQLALCHEMY_DATABASE_URI"])
    return sessionmaker(bind=engine)


def test_poll_updates_installed_batteries(ha_app, ha_client_f):
    """Installed battery in a device with ha_entity_id gets battery_percentage updated."""
    ha_client_f.post("/device/add", data={"name": "Dev A", "battery_slots": "2"})
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    # Assign battery to device
    ha_client_f.post("/battery/1/assign", data={"device_id": "1"})
    # Set ha_entity_id on device
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev A", "battery_slots": "2", "ha_entity_id": "sensor.dev_a_battery"
    })

    from ha_client import HomeAssistantClient
    from ha_poller import HaPoller
    from models import Battery

    mock_ha = MagicMock(spec=HomeAssistantClient)
    mock_ha.enabled = True
    mock_ha.get_state.return_value = 42

    Session = _make_session_factory(ha_app)
    poller = HaPoller(mock_ha, Session, interval=300)
    poller._poll_once()

    s = Session()
    b = s.get(Battery, 1)
    assert b.battery_percentage == 42
    s.close()

    mock_ha.get_state.assert_called_once_with("sensor.dev_a_battery")


def test_poll_skips_uninstalled_batteries(ha_app, ha_client_f):
    """Batteries that are available (not installed) are not updated by the poller."""
    ha_client_f.post("/device/add", data={"name": "Dev B", "battery_slots": "1"})
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    # Set entity on device but do NOT install the battery
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev B", "battery_slots": "1", "ha_entity_id": "sensor.dev_b_battery"
    })

    from ha_client import HomeAssistantClient
    from ha_poller import HaPoller
    from models import Battery

    mock_ha = MagicMock(spec=HomeAssistantClient)
    mock_ha.enabled = True
    mock_ha.get_state.return_value = 55

    Session = _make_session_factory(ha_app)
    poller = HaPoller(mock_ha, Session, interval=300)
    poller._poll_once()

    s = Session()
    b = s.get(Battery, 1)
    assert b.battery_percentage is None   # uninstalled — not touched
    s.close()


def test_poll_skips_devices_without_entity_id(ha_app, ha_client_f):
    """Devices with no ha_entity_id must never reach get_state."""
    ha_client_f.post("/device/add", data={"name": "Dev C", "battery_slots": "1"})

    from ha_client import HomeAssistantClient
    from ha_poller import HaPoller

    mock_ha = MagicMock(spec=HomeAssistantClient)
    mock_ha.enabled = True

    Session = _make_session_factory(ha_app)
    poller = HaPoller(mock_ha, Session, interval=300)
    poller._poll_once()

    mock_ha.get_state.assert_not_called()


def test_poll_handles_api_error_gracefully(ha_app, ha_client_f):
    """When get_state returns None, no exception is raised and percentage stays None."""
    ha_client_f.post("/device/add", data={"name": "Dev D", "battery_slots": "1"})
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    ha_client_f.post("/battery/1/assign", data={"device_id": "1"})
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev D", "battery_slots": "1", "ha_entity_id": "sensor.dev_d"
    })

    from ha_client import HomeAssistantClient
    from ha_poller import HaPoller
    from models import Battery

    mock_ha = MagicMock(spec=HomeAssistantClient)
    mock_ha.enabled = True
    mock_ha.get_state.return_value = None  # simulate API failure

    Session = _make_session_factory(ha_app)
    poller = HaPoller(mock_ha, Session, interval=300)
    poller._poll_once()  # must not raise

    s = Session()
    b = s.get(Battery, 1)
    assert b.battery_percentage is None
    s.close()


# ---------------------------------------------------------------------------
# Group 4 — Dashboard / device / battery UI with HA enabled
# ---------------------------------------------------------------------------

def test_dashboard_shows_ha_column_when_enabled(ha_client_f):
    resp = ha_client_f.get("/")
    assert resp.status_code == 200
    assert b"ha-pct" in resp.data


def test_dashboard_shows_low_battery_warning(ha_app, ha_client_f):
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})

    # Set percentage directly in DB
    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker
    from models import Battery
    engine = create_engine(ha_app.config["SQLALCHEMY_DATABASE_URI"])
    s = sessionmaker(bind=engine)()
    b = s.get(Battery, 1)
    b.battery_percentage = 15
    s.commit()
    s.close()

    resp = ha_client_f.get("/")
    assert b"badge-warning" in resp.data
    assert b"15%" in resp.data


def test_dashboard_no_warning_for_high_percentage(ha_app, ha_client_f):
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})

    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker
    from models import Battery
    engine = create_engine(ha_app.config["SQLALCHEMY_DATABASE_URI"])
    s = sessionmaker(bind=engine)()
    b = s.get(Battery, 1)
    b.battery_percentage = 85
    s.commit()
    s.close()

    resp = ha_client_f.get("/")
    assert b"85%" in resp.data
    # badge-warning should NOT appear for this battery's percentage
    # (may still appear in page for other reasons, so check row contains 85% but not warning badge near it)
    assert b"col-ha-pct" in resp.data  # column rendered


def test_device_detail_shows_ha_field(ha_client_f):
    ha_client_f.post("/device/add", data={"name": "Dev E", "battery_slots": "1"})
    resp = ha_client_f.get("/device/1")
    assert resp.status_code == 200
    assert b"ha_entity_id" in resp.data


def test_edit_device_ha_entity_id_saves(ha_client_f):
    ha_client_f.post("/device/add", data={"name": "Dev F", "battery_slots": "1"})
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev F", "battery_slots": "1", "ha_entity_id": "sensor.my_remote"
    })
    resp = ha_client_f.get("/device/1")
    assert b"sensor.my_remote" in resp.data


def test_edit_device_ha_entity_id_clear(ha_client_f):
    ha_client_f.post("/device/add", data={"name": "Dev G", "battery_slots": "1"})
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev G", "battery_slots": "1", "ha_entity_id": "sensor.foo"
    })
    # Now clear it
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev G", "battery_slots": "1", "ha_entity_id": ""
    })
    resp = ha_client_f.get("/device/1")
    assert b"sensor.foo" not in resp.data


def test_charge_log_resets_percentage_to_100(ha_app, ha_client_f):
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})

    # Set low percentage
    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker
    from models import Battery
    engine = create_engine(ha_app.config["SQLALCHEMY_DATABASE_URI"])
    s = sessionmaker(bind=engine)()
    b = s.get(Battery, 1)
    b.battery_percentage = 30
    s.commit()
    s.close()

    # Log a charge
    ha_client_f.post("/battery/1/charge-log/add", data={"charged_date": "2026-04-13"})

    s2 = sessionmaker(bind=engine)()
    b2 = s2.get(Battery, 1)
    assert b2.battery_percentage == 100
    s2.close()


def test_manual_battery_percentage_edit(ha_client_f):
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})

    # Set via edit form
    ha_client_f.post("/battery/1/edit-details", data={"battery_percentage": "55"})
    resp = ha_client_f.get("/battery/1")
    assert b"55%" in resp.data

    # Clear via edit form
    ha_client_f.post("/battery/1/edit-details", data={"battery_percentage": ""})
    resp2 = ha_client_f.get("/battery/1")
    # "55%" still appears once in history; the info-table row is gone (current value is None)
    assert resp2.data.count(b"55%") == 1


# ---------------------------------------------------------------------------
# Group 3 additions — skip-on-no-change + history logging (poller)
# ---------------------------------------------------------------------------

def test_poll_skips_update_when_percentage_unchanged(ha_app, ha_client_f):
    """No write and no pct_log entry when the polled value matches the stored value."""
    ha_client_f.post("/device/add", data={"name": "Dev NoCh", "battery_slots": "1"})
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    ha_client_f.post("/battery/1/assign", data={"device_id": "1"})
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev NoCh", "battery_slots": "1", "ha_entity_id": "sensor.noch"
    })

    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker
    from models import Battery, BatteryPctLog
    engine = create_engine(ha_app.config["SQLALCHEMY_DATABASE_URI"])
    s = sessionmaker(bind=engine)()
    s.get(Battery, 1).battery_percentage = 50
    s.commit(); s.close()

    from ha_client import HomeAssistantClient
    from ha_poller import HaPoller
    mock_ha = MagicMock(spec=HomeAssistantClient)
    mock_ha.enabled = True
    mock_ha.get_state.return_value = 50  # same value — should be a no-op

    Session = _make_session_factory(ha_app)
    HaPoller(mock_ha, Session, interval=300)._poll_once()

    s2 = sessionmaker(bind=engine)()
    assert s2.query(BatteryPctLog).count() == 0
    s2.close()


def test_poll_creates_pct_log_on_change(ha_app, ha_client_f):
    """A pct_log entry with source='poll' is written when the value changes."""
    ha_client_f.post("/device/add", data={"name": "Dev Chg", "battery_slots": "1"})
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    ha_client_f.post("/battery/1/assign", data={"device_id": "1"})
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev Chg", "battery_slots": "1", "ha_entity_id": "sensor.chg"
    })

    from ha_client import HomeAssistantClient
    from ha_poller import HaPoller
    from models import BatteryPctLog
    mock_ha = MagicMock(spec=HomeAssistantClient)
    mock_ha.enabled = True
    mock_ha.get_state.return_value = 72

    Session = _make_session_factory(ha_app)
    HaPoller(mock_ha, Session, interval=300)._poll_once()

    s = Session()
    logs = s.query(BatteryPctLog).filter_by(battery_id=1).all()
    assert len(logs) == 1
    assert logs[0].percentage == 72
    assert logs[0].source == "poll"
    s.close()


# ---------------------------------------------------------------------------
# Group 4 additions — history logging (routes / UI)
# ---------------------------------------------------------------------------

def test_charge_log_creates_pct_log_entry(ha_app, ha_client_f):
    """Logging a charge creates a pct_log entry with percentage=100, source='charge'."""
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    ha_client_f.post("/battery/1/charge-log/add", data={"charged_date": "2026-04-13"})

    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker
    from models import BatteryPctLog
    engine = create_engine(ha_app.config["SQLALCHEMY_DATABASE_URI"])
    s = sessionmaker(bind=engine)()
    logs = s.query(BatteryPctLog).filter_by(battery_id=1).all()
    assert len(logs) == 1
    assert logs[0].percentage == 100
    assert logs[0].source == "charge"
    s.close()


def test_manual_edit_creates_pct_log_entry(ha_client_f):
    """Saving a new battery_percentage via edit-details creates a history entry."""
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    ha_client_f.post("/battery/1/edit-details", data={"battery_percentage": "65"})

    resp = ha_client_f.get("/battery/1")
    assert b"65%" in resp.data
    assert b"manual" in resp.data  # source shown in history table


def test_manual_edit_no_log_when_unchanged(ha_client_f):
    """Saving the same percentage twice produces only one history entry."""
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    ha_client_f.post("/battery/1/edit-details", data={"battery_percentage": "40"})
    ha_client_f.post("/battery/1/edit-details", data={"battery_percentage": "40"})

    resp = ha_client_f.get("/battery/1")
    # "40%" appears once in the info section and once in history — not twice in history
    assert resp.data.count(b"40%") == 2


# ---------------------------------------------------------------------------
# Group 5 — live fetch on device page load + /ha/entities endpoint
# ---------------------------------------------------------------------------

def test_device_detail_shows_live_pct(ha_app, ha_client_f):
    """Opening a device page fetches live % from HA and displays it."""
    ha_client_f.post("/device/add", data={"name": "Dev Live", "battery_slots": "1"})
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev Live", "battery_slots": "1", "ha_entity_id": "sensor.live_test"
    })

    mock_resp = MagicMock()
    mock_resp.json.return_value = {"state": "78", "entity_id": "sensor.live_test"}
    mock_resp.raise_for_status.return_value = None

    with patch("ha_client.requests.get", return_value=mock_resp):
        resp = ha_client_f.get("/device/1")

    assert resp.status_code == 200
    assert b"78%" in resp.data


def test_device_detail_updates_battery_on_load(ha_app, ha_client_f):
    """Battery percentage is updated (with pct_log) when device page is loaded and value changed."""
    ha_client_f.post("/device/add", data={"name": "Dev Update", "battery_slots": "1"})
    ha_client_f.post("/battery/add", data={"brand": "X", "count": "1"})
    ha_client_f.post("/battery/1/assign", data={"device_id": "1"})
    ha_client_f.post("/device/1/edit", data={
        "name": "Dev Update", "battery_slots": "1", "ha_entity_id": "sensor.update_test"
    })

    mock_resp = MagicMock()
    mock_resp.json.return_value = {"state": "63"}
    mock_resp.raise_for_status.return_value = None

    with patch("ha_client.requests.get", return_value=mock_resp):
        ha_client_f.get("/device/1")

    from sqlalchemy import create_engine
    from sqlalchemy.orm import sessionmaker
    from models import Battery, BatteryPctLog
    engine = create_engine(ha_app.config["SQLALCHEMY_DATABASE_URI"])
    s = sessionmaker(bind=engine)()
    b = s.get(Battery, 1)
    assert b.battery_percentage == 63
    logs = s.query(BatteryPctLog).filter_by(battery_id=1, source="poll").all()
    assert len(logs) == 1
    assert logs[0].percentage == 63
    s.close()


def test_ha_entities_endpoint(ha_app, ha_client_f):
    """GET /ha/entities returns only battery-related entities from HA."""
    mock_resp = MagicMock()
    mock_resp.json.return_value = [
        {"entity_id": "sensor.tv_battery",    "attributes": {"device_class": "battery", "friendly_name": "TV Battery"}},
        {"entity_id": "sensor.remote_battery", "attributes": {"friendly_name": "Remote"}},  # 'battery' in id
        {"entity_id": "sensor.temperature",   "attributes": {"device_class": "temperature", "friendly_name": "Temp"}},
        {"entity_id": "light.living_room",     "attributes": {}},
    ]
    mock_resp.raise_for_status.return_value = None

    with patch("ha_client.requests.get", return_value=mock_resp):
        resp = ha_client_f.get("/ha/entities")

    assert resp.status_code == 200
    data = resp.get_json()
    entity_ids = [e["entity_id"] for e in data]
    assert "sensor.tv_battery" in entity_ids
    assert "sensor.remote_battery" in entity_ids
    assert "sensor.temperature" not in entity_ids
    assert "light.living_room" not in entity_ids
    # friendly names present
    tv = next(e for e in data if e["entity_id"] == "sensor.tv_battery")
    assert tv["friendly_name"] == "TV Battery"


def test_ha_entities_only_sensor_domain(ha_app, ha_client_f):
    """Only sensor. entities are returned — all other domains are excluded."""
    mock_resp = MagicMock()
    mock_resp.json.return_value = [
        {"entity_id": "sensor.remote_battery",          "attributes": {"device_class": "battery", "friendly_name": "Remote"}},
        {"entity_id": "binary_sensor.door_battery_low", "attributes": {"device_class": "battery", "friendly_name": "Door low"}},
        {"entity_id": "binary_sensor.smoke_battery",    "attributes": {"friendly_name": "Smoke"}},
        {"entity_id": "input_number.battery_threshold", "attributes": {}},
    ]
    mock_resp.raise_for_status.return_value = None

    with patch("ha_client.requests.get", return_value=mock_resp):
        resp = ha_client_f.get("/ha/entities")

    assert resp.status_code == 200
    data = resp.get_json()
    entity_ids = [e["entity_id"] for e in data]
    assert entity_ids == ["sensor.remote_battery"]