from __future__ import annotations

import sys
from pathlib import Path

import pytest

sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))

from cc_slim.engine import resolve_config


def test_resolve_config_uses_defaults(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
    monkeypatch.setenv("OPENAI_API_KEY", "env-openai-key")

    config = resolve_config(tmp_path, {})

    assert config.provider == "openai"
    assert config.model == "gpt-4.1-mini"
    assert config.api_key == "env-openai-key"
    assert config.base_url is None
    assert config.max_turns == 12


def test_resolve_config_priority_cli_over_env_over_file(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
    (tmp_path / ".cc-slim.toml").write_text(
        """
[cc_slim]
provider = "anthropic"
model = "file-model"
api_key = "file-key"
base_url = "https://file.example"
max_turns = 4
""".strip(),
        encoding="utf-8",
    )
    monkeypatch.setenv("CC_SLIM_PROVIDER", "openai")
    monkeypatch.setenv("CC_SLIM_MODEL", "env-model")
    monkeypatch.setenv("CC_SLIM_API_KEY", "env-key")
    monkeypatch.setenv("CC_SLIM_BASE_URL", "https://env.example")
    monkeypatch.setenv("CC_SLIM_MAX_TURNS", "9")

    config = resolve_config(
        tmp_path,
        {
            "provider": "anthropic",
            "model": "cli-model",
            "api_key": "cli-key",
            "base_url": "https://cli.example",
            "max_turns": 15,
        },
    )

    assert config.provider == "anthropic"
    assert config.model == "cli-model"
    assert config.api_key == "cli-key"
    assert config.base_url == "https://cli.example"
    assert config.max_turns == 15


def test_resolve_config_requires_api_key(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
    monkeypatch.delenv("CC_SLIM_API_KEY", raising=False)
    monkeypatch.delenv("OPENAI_API_KEY", raising=False)
    monkeypatch.delenv("ANTHROPIC_API_KEY", raising=False)

    with pytest.raises(ValueError, match="缺少 API key"):
        resolve_config(tmp_path, {})