"""v3 M1c — provider switching (on-watch cycle + control-panel offline hook).

The daemon owns the enabled set/order, so the watch's "switch" tap just asks it
to advance (provnext -> _cycle_provider) and the panel's active_provider edit is
mirrored into the live loop (request_provider_switch). Both funnel through the
same _set_active_provider path exercised here without a real BLE loop.
"""

import json
from unittest.mock import MagicMock

from daemon import config


def _cfg(tmp_path, monkeypatch, data: dict):
    p = tmp_path / "config.json"
    p.write_text(json.dumps(data), encoding="utf-8")
    monkeypatch.setenv("CLAWDMETER_CONFIG", str(p))
    monkeypatch.setenv("LOCALAPPDATA", str(tmp_path))
    return p


def test_enabled_ids_defaults_to_anthropic(tmp_path, monkeypatch):
    from daemon import claude_usage_daemon_windows as d
    _cfg(tmp_path, monkeypatch, {"version": 2})
    assert d._enabled_ids() == ["anthropic"]


def test_cycle_advances_and_wraps(tmp_path, monkeypatch):
    from daemon import claude_usage_daemon_windows as d
    _cfg(tmp_path, monkeypatch, {
        "version": 2,
        "display_order": ["anthropic", "openai", "zai"],
        "providers": {"anthropic": {"enabled": True},
                      "openai": {"enabled": True},
                      "zai": {"enabled": True}},
        "active_provider": "anthropic"})
    sess = d.Session(MagicMock())
    sess._cycle_provider()
    assert config.active_provider_id() == "openai"
    sess._cycle_provider()
    assert config.active_provider_id() == "zai"
    sess._cycle_provider()   # wraps back to the start
    assert config.active_provider_id() == "anthropic"


def test_cycle_skips_disabled(tmp_path, monkeypatch):
    from daemon import claude_usage_daemon_windows as d
    _cfg(tmp_path, monkeypatch, {
        "version": 2,
        "display_order": ["anthropic", "openai", "zai"],
        "providers": {"anthropic": {"enabled": True},
                      "openai": {"enabled": False},
                      "zai": {"enabled": True}},
        "active_provider": "anthropic"})
    sess = d.Session(MagicMock())
    sess._cycle_provider()
    assert config.active_provider_id() == "zai"   # openai skipped (disabled)


def test_cycle_single_enabled_is_noop(tmp_path, monkeypatch):
    from daemon import claude_usage_daemon_windows as d
    _cfg(tmp_path, monkeypatch, {"version": 2, "active_provider": "anthropic"})
    sess = d.Session(MagicMock())
    sess._cycle_provider()
    assert config.active_provider_id() == "anthropic"


def test_request_switch_offline_persists(tmp_path, monkeypatch):
    from daemon import claude_usage_daemon_windows as d
    _cfg(tmp_path, monkeypatch, {"version": 2, "active_provider": "anthropic"})
    monkeypatch.setattr(d, "_active_session", None)
    d.request_provider_switch("zai")
    assert config.active_provider_id() == "zai"


def test_request_switch_ignores_bad_id(tmp_path, monkeypatch):
    from daemon import claude_usage_daemon_windows as d
    _cfg(tmp_path, monkeypatch, {"version": 2, "active_provider": "anthropic"})
    monkeypatch.setattr(d, "_active_session", None)
    d.request_provider_switch("bogus")
    assert config.active_provider_id() == "anthropic"