#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Gemini fallback kill-switch contract."""

import re
from pathlib import Path

from services.ai_provider import AIProviderService, AIResponse
from services.gemini_service import GeminiService

ROOT = Path(__file__).resolve().parents[1]


def _production_python_files():
    for folder in ("services", "routes"):
        yield from sorted((ROOT / folder).rglob("*.py"))
    for filename in ("scheduler.py", "config.py"):
        path = ROOT / filename
        if path.exists():
            yield path


def _rel(path: Path) -> str:
    return path.relative_to(ROOT).as_posix()


def test_gemini_guard_defaults_disabled(monkeypatch):
    from services.gemini_guard import get_gemini_api_key, is_gemini_fallback_enabled

    monkeypatch.delenv("GEMINI_API_HARD_DISABLED", raising=False)
    monkeypatch.delenv("GEMINI_FALLBACK_ENABLED", raising=False)
    monkeypatch.setenv("GEMINI_API_KEY", "test-key")

    assert is_gemini_fallback_enabled("test") is False
    assert get_gemini_api_key("test") == ""


def test_gemini_guard_hard_switch_blocks_enabled_fallback(monkeypatch):
    from services.gemini_guard import get_gemini_api_key, is_gemini_fallback_enabled

    monkeypatch.delenv("GEMINI_API_HARD_DISABLED", raising=False)
    monkeypatch.setenv("GEMINI_FALLBACK_ENABLED", "true")
    monkeypatch.setenv("GEMINI_API_KEY", "test-key")

    assert is_gemini_fallback_enabled("test") is False
    assert get_gemini_api_key("test") == ""


def test_gemini_guard_requires_explicit_emergency_unlock(monkeypatch):
    from services.gemini_guard import get_gemini_api_key, is_gemini_fallback_enabled

    monkeypatch.setenv("GEMINI_API_HARD_DISABLED", "false")
    monkeypatch.setenv("GEMINI_FALLBACK_ENABLED", "true")
    monkeypatch.setenv("GEMINI_API_KEY", "test-key")

    assert is_gemini_fallback_enabled("test") is True
    assert get_gemini_api_key("test") == "test-key"


def test_gemini_guard_respects_context_allowlist(monkeypatch):
    from services.gemini_guard import get_gemini_api_key, is_gemini_fallback_enabled

    monkeypatch.setenv("GEMINI_API_HARD_DISABLED", "false")
    monkeypatch.setenv("GEMINI_FALLBACK_ENABLED", "true")
    monkeypatch.setenv("GEMINI_ALLOWED_CONTEXTS", "code_review")
    monkeypatch.setenv("GEMINI_API_KEY", "test-key")

    assert is_gemini_fallback_enabled("code_review") is True
    assert get_gemini_api_key("openclaw_strategy") == ""


def test_ai_provider_does_not_call_gemini_when_guard_disabled(monkeypatch):
    monkeypatch.delenv("GEMINI_API_HARD_DISABLED", raising=False)
    monkeypatch.delenv("GEMINI_FALLBACK_ENABLED", raising=False)
    service = AIProviderService(default_provider="ollama")
    failed_ollama = AIResponse(
        success=False,
        content="",
        model="qwen2.5-coder:7b",
        provider="ollama",
        error="ollama down",
    )

    def forbidden_fallback():
        raise AssertionError("Gemini fallback must be blocked by default")

    result = service._gemini_fallback(failed_ollama, forbidden_fallback)

    assert result.success is False
    assert result.provider == "ollama"
    assert "GEMINI_API_HARD_DISABLED=true" in (result.error or "")


def test_gemini_service_check_connection_is_blocked_by_default(monkeypatch):
    monkeypatch.delenv("GEMINI_API_HARD_DISABLED", raising=False)
    monkeypatch.delenv("GEMINI_FALLBACK_ENABLED", raising=False)
    monkeypatch.setenv("GEMINI_API_KEY", "test-key")
    service = GeminiService()

    def forbidden_init():
        raise AssertionError("SDK initialization must not run when fallback is disabled")

    monkeypatch.setattr(service, "_ensure_initialized", forbidden_init)

    result = service.generate("hello")

    assert result.success is False
    assert "GEMINI_API_HARD_DISABLED=true" in (result.error or "")


def test_mcp_collector_does_not_initialize_gemini_when_guard_disabled(monkeypatch):
    import services.mcp_collector_service as mcp_mod

    monkeypatch.delenv("GEMINI_API_HARD_DISABLED", raising=False)
    monkeypatch.delenv("GEMINI_FALLBACK_ENABLED", raising=False)
    monkeypatch.setenv("GEMINI_API_KEY", "test-key")
    service = mcp_mod.MCPCollectorService()

    assert service._ensure_init() is False
    assert service._genai is None


def test_openclaw_direct_gemini_call_is_blocked_by_default(monkeypatch):
    import services.openclaw_strategist_service as svc

    monkeypatch.delenv("GEMINI_API_HARD_DISABLED", raising=False)
    monkeypatch.delenv("GEMINI_FALLBACK_ENABLED", raising=False)
    monkeypatch.setenv("GEMINI_API_KEY", "test-key")

    assert svc._call_gemini("system", "user", caller="openclaw_qa_gemini_fallback") is None


def test_no_direct_gemini_api_key_env_read_outside_guard_or_config():
    allowed = {"config.py", "services/gemini_guard.py"}
    offenders = []
    pattern = re.compile(r"os\.getenv\(\s*['\"]GEMINI_API_KEY['\"]")

    for path in _production_python_files():
        if _rel(path) in allowed:
            continue
        if pattern.search(path.read_text(encoding="utf-8")):
            offenders.append(_rel(path))

    assert offenders == []


def test_gemini_outbound_files_are_guarded():
    allowed = {
        "routes/openclaw_bot_routes.py",
        "services/code_review_pipeline_service.py",
        "services/gemini_service.py",
        "services/mcp_collector_service.py",
        "services/openclaw_strategist_service.py",
    }
    outbound_markers = (
        "google.generativeai",
        "genai.configure",
        "GenerativeModel",
        "generate_content(",
        "generateContent?key=",
    )
    offenders = []
    unguarded = []

    for path in _production_python_files():
        text = path.read_text(encoding="utf-8")
        has_outbound = any(marker in text for marker in outbound_markers)
        if not has_outbound:
            continue
        rel = _rel(path)
        if rel not in allowed:
            offenders.append(rel)
        if "get_gemini_api_key" not in text:
            unguarded.append(rel)

    assert offenders == []
    assert unguarded == []