from datetime import datetime, timedelta
from types import SimpleNamespace

from cli import HermesCLI


def _make_cli(model: str = "anthropic/claude-sonnet-4-20250514"):
    cli_obj = HermesCLI.__new__(HermesCLI)
    cli_obj.model = model
    cli_obj.session_start = datetime.now() - timedelta(minutes=14, seconds=32)
    cli_obj.conversation_history = [{"role": "user", "content": "hi"}]
    cli_obj.agent = None
    return cli_obj


def _attach_agent(
    cli_obj,
    *,
    input_tokens: int | None = None,
    output_tokens: int | None = None,
    cache_read_tokens: int = 0,
    cache_write_tokens: int = 0,
    prompt_tokens: int,
    completion_tokens: int,
    total_tokens: int,
    api_calls: int,
    context_tokens: int,
    context_length: int,
    compressions: int = 0,
):
    cli_obj.agent = SimpleNamespace(
        model=cli_obj.model,
        provider="anthropic" if cli_obj.model.startswith("anthropic/") else None,
        base_url="",
        session_input_tokens=input_tokens if input_tokens is not None else prompt_tokens,
        session_output_tokens=output_tokens if output_tokens is not None else completion_tokens,
        session_cache_read_tokens=cache_read_tokens,
        session_cache_write_tokens=cache_write_tokens,
        session_prompt_tokens=prompt_tokens,
        session_completion_tokens=completion_tokens,
        session_total_tokens=total_tokens,
        session_api_calls=api_calls,
        context_compressor=SimpleNamespace(
            last_prompt_tokens=context_tokens,
            context_length=context_length,
            compression_count=compressions,
        ),
    )
    return cli_obj


class TestCLIStatusBar:
    def test_context_style_thresholds(self):
        cli_obj = _make_cli()

        assert cli_obj._status_bar_context_style(None) == "class:status-bar-dim"
        assert cli_obj._status_bar_context_style(10) == "class:status-bar-good"
        assert cli_obj._status_bar_context_style(50) == "class:status-bar-warn"
        assert cli_obj._status_bar_context_style(81) == "class:status-bar-bad"
        assert cli_obj._status_bar_context_style(95) == "class:status-bar-critical"

    def test_build_status_bar_text_for_wide_terminal(self):
        cli_obj = _attach_agent(
            _make_cli(),
            prompt_tokens=10_230,
            completion_tokens=2_220,
            total_tokens=12_450,
            api_calls=7,
            context_tokens=12_450,
            context_length=200_000,
        )

        text = cli_obj._build_status_bar_text(width=120)

        assert "claude-sonnet-4-20250514" in text
        assert "12.4K/200K" in text
        assert "6%" in text
        assert "$0.06" not in text  # cost hidden by default
        assert "15m" in text

    def test_build_status_bar_text_no_cost_in_status_bar(self):
        cli_obj = _attach_agent(
            _make_cli(),
            prompt_tokens=10000,
            completion_tokens=5000,
            total_tokens=15000,
            api_calls=7,
            context_tokens=50000,
            context_length=200_000,
        )

        text = cli_obj._build_status_bar_text(width=120)
        assert "$" not in text  # cost is never shown in status bar

    def test_build_status_bar_text_collapses_for_narrow_terminal(self):
        cli_obj = _attach_agent(
            _make_cli(),
            prompt_tokens=10000,
            completion_tokens=2400,
            total_tokens=12400,
            api_calls=7,
            context_tokens=12400,
            context_length=200_000,
        )

        text = cli_obj._build_status_bar_text(width=60)

        assert "⚕" in text
        assert "$0.06" not in text  # cost hidden by default
        assert "15m" in text
        assert "200K" not in text

    def test_build_status_bar_text_handles_missing_agent(self):
        cli_obj = _make_cli()

        text = cli_obj._build_status_bar_text(width=100)

        assert "⚕" in text
        assert "claude-sonnet-4-20250514" in text


class TestCLIUsageReport:
    def test_show_usage_includes_estimated_cost(self, capsys):
        cli_obj = _attach_agent(
            _make_cli(),
            prompt_tokens=10_230,
            completion_tokens=2_220,
            total_tokens=12_450,
            api_calls=7,
            context_tokens=12_450,
            context_length=200_000,
            compressions=1,
        )
        cli_obj.verbose = False

        cli_obj._show_usage()
        output = capsys.readouterr().out

        assert "Model:" in output
        assert "Cost status:" in output
        assert "Cost source:" in output
        assert "Total cost:" in output
        assert "$" in output
        assert "0.064" in output
        assert "Session duration:" in output
        assert "Compressions:" in output

    def test_show_usage_marks_unknown_pricing(self, capsys):
        cli_obj = _attach_agent(
            _make_cli(model="local/my-custom-model"),
            prompt_tokens=1_000,
            completion_tokens=500,
            total_tokens=1_500,
            api_calls=1,
            context_tokens=1_000,
            context_length=32_000,
        )
        cli_obj.verbose = False

        cli_obj._show_usage()
        output = capsys.readouterr().out

        assert "Total cost:" in output
        assert "n/a" in output
        assert "Pricing unknown for local/my-custom-model" in output

    def test_zero_priced_provider_models_stay_unknown(self, capsys):
        cli_obj = _attach_agent(
            _make_cli(model="glm-5"),
            prompt_tokens=1_000,
            completion_tokens=500,
            total_tokens=1_500,
            api_calls=1,
            context_tokens=1_000,
            context_length=32_000,
        )
        cli_obj.verbose = False

        cli_obj._show_usage()
        output = capsys.readouterr().out

        assert "Total cost:" in output
        assert "n/a" in output
        assert "Pricing unknown for glm-5" in output
