"""app.widgets.calendar -- unit-level, no HTTP: constructs Widget/
CalendarWidgetConfig rows directly and monkeypatches the underlying
fetch calls (get_or_refresh_*_for_widget), which have their own
dedicated fetch/merge test coverage elsewhere (test_calendar_feed.py
etc.) -- this file is about the widget wiring itself: does render()
produce a correctly-sized image, do advance/back move browse_offset."""

from __future__ import annotations

import time

from app import widgets
from app.db import widget_locked
from app.models import CalendarWidgetConfig, Frame, Widget


def _make_widget(db_session, **cfg_kwargs) -> tuple[Frame, Widget]:
    frame = db_session.get(Frame, 1)
    widget = Widget(frame_id=frame.id, widget_type="calendar", x=0, y=0, w=8, h=5,
                    sort_order=0, created_at=time.time())
    db_session.add(widget)
    db_session.flush()
    db_session.add(CalendarWidgetConfig(widget_id=widget.id, **cfg_kwargs))
    db_session.commit()
    return frame, widget


def _stub_fetches(monkeypatch, events=None, weather=None, tasks=None):
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_calendar_events_for_widget",
                        lambda db, frame, widget: (events or [], ""))
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_weather_for_widget",
                        lambda db, frame, widget: weather or [])
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_tasks_for_widget",
                        lambda db, frame, widget: tasks or [])


def test_render_produces_a_correctly_sized_image(db_session, monkeypatch):
    frame, widget = _make_widget(db_session, view="agenda")
    _stub_fetches(monkeypatch)

    img = widgets.calendar.render(db_session, frame, widget, 400, 300)
    assert img.size == (400, 300)
    assert img.mode == "RGB"


def test_render_resizes_when_target_differs_from_full_panel(db_session, monkeypatch):
    """Phase-1 calendar widgets are still full-panel-layout internally
    (see app/widgets/calendar.py's own module docstring) -- resizing to
    fit whatever target box is asked for keeps render_panel's contract
    (exact target_w x target_h) satisfied even before real small-widget
    layout support lands."""
    frame, widget = _make_widget(db_session, view="week")
    _stub_fetches(monkeypatch)

    img = widgets.calendar.render(db_session, frame, widget, 250, 150)
    assert img.size == (250, 150)


def test_weather_only_fetched_when_enabled(db_session, monkeypatch):
    frame, widget = _make_widget(db_session, view="agenda", weather_enabled=False)
    calls = []
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_calendar_events_for_widget",
                        lambda db, frame, widget: ([], ""))
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_weather_for_widget",
                        lambda db, frame, widget: calls.append(1) or [])
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_tasks_for_widget",
                        lambda db, frame, widget: [])

    widgets.calendar.render(db_session, frame, widget, 400, 300)
    assert calls == []


def test_tasks_only_fetched_for_week_view_when_enabled(db_session, monkeypatch):
    frame, widget = _make_widget(db_session, view="agenda", tasks_enabled=True)  # not week view
    calls = []
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_calendar_events_for_widget",
                        lambda db, frame, widget: ([], ""))
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_weather_for_widget",
                        lambda db, frame, widget: [])
    monkeypatch.setattr(widgets.calendar, "get_or_refresh_tasks_for_widget",
                        lambda db, frame, widget: calls.append(1) or [])

    widgets.calendar.render(db_session, frame, widget, 400, 300)
    assert calls == []  # agenda view -- tasks never shown, so never fetched


def test_advance_action_increments_browse_offset(db_session):
    frame, widget = _make_widget(db_session, view="week", browse_offset=0)
    widgets.calendar.ACTIONS["advance"](db_session, frame, widget)
    cfg = db_session.get(CalendarWidgetConfig, widget.id)
    assert cfg.browse_offset == 1

    widgets.calendar.ACTIONS["advance"](db_session, frame, widget)
    cfg = db_session.get(CalendarWidgetConfig, widget.id)
    assert cfg.browse_offset == 2  # accumulates, doesn't reset-then-increment


def test_back_action_decrements_browse_offset(db_session):
    frame, widget = _make_widget(db_session, view="week", browse_offset=3)
    widgets.calendar.ACTIONS["back"](db_session, frame, widget)
    cfg = db_session.get(CalendarWidgetConfig, widget.id)
    assert cfg.browse_offset == 2