"""Tests for analyzer.py JSON-stripping logic.

Reproduces the markdown-codeblock-stripping in the LLM retry loop. Real
Qwen responses sometimes wrap their JSON in ```json …``` fences (despite
the prompt asking for raw JSON), and the analyzer must tolerate that
without resorting to retries.
"""
import json
import sys
import types

# Stub openai before importing analyzer
if "openai" not in sys.modules:
    openai_stub = types.ModuleType("openai")
    openai_stub.OpenAI = lambda **kw: None
    sys.modules["openai"] = openai_stub


def _strip_markdown_fences(content: str) -> str:
    """Mirror the analyzer's markdown-stripping snippet so we can unit-test
    the parsing rules without actually invoking the LLM.

    Keep this in sync with analyzer.py around the `if content.startswith("```")`
    branch — if the analyzer changes, this helper changes too. The point of
    the duplication is that the analyzer's stripping is buried in an async
    LLM call that we cannot easily unit-test directly.
    """
    content = content.strip()
    if content.startswith("```"):
        content = content.split("\n", 1)[1]
    if content.endswith("```"):
        content = content.rsplit("```", 1)[0]
    if content.startswith("```json"):
        content = content[7:]
    return content.strip()


SAMPLE_JSON = '{"gwoeScore": 7.0, "title": "Test"}'


class TestMarkdownStripping:
    def test_plain_json_unchanged(self):
        assert _strip_markdown_fences(SAMPLE_JSON) == SAMPLE_JSON

    def test_json_in_markdown_fence(self):
        wrapped = f"```json\n{SAMPLE_JSON}\n```"
        cleaned = _strip_markdown_fences(wrapped)
        assert json.loads(cleaned)["gwoeScore"] == 7.0

    def test_json_in_plain_fence(self):
        wrapped = f"```\n{SAMPLE_JSON}\n```"
        cleaned = _strip_markdown_fences(wrapped)
        assert json.loads(cleaned)["gwoeScore"] == 7.0

    def test_leading_whitespace_stripped(self):
        wrapped = f"   \n  {SAMPLE_JSON}  \n  "
        assert json.loads(_strip_markdown_fences(wrapped))["gwoeScore"] == 7.0

    def test_trailing_fence_stripped(self):
        wrapped = f"{SAMPLE_JSON}\n```"
        cleaned = _strip_markdown_fences(wrapped)
        assert json.loads(cleaned)["gwoeScore"] == 7.0


# ─── Coverage-Backfill (#134) ────────────────────────────────────────────────

import pytest


class TestContentFingerprint:
    """analyzer._content_fingerprint mirrored Helper, getrennt von qwen_bewerter."""

    def test_empty_returns_len_zero(self):
        from app.analyzer import _content_fingerprint
        assert _content_fingerprint("") == "len=0"

    def test_non_empty_includes_sha1(self):
        from app.analyzer import _content_fingerprint
        result = _content_fingerprint("hallo welt")
        assert result.startswith("len=10 sha1=")


class TestGetDefaultBewerter:
    def test_returns_qwen_instance(self, monkeypatch):
        """Lazy-Import: get_default_bewerter() ruft QwenBewerter()."""
        from app import analyzer
        from unittest.mock import MagicMock
        # Stub QwenBewerter im Adapter-Pfad, sodass kein echter Import passiert
        import sys
        fake_module = type(sys)("app.adapters.qwen_bewerter")
        fake_module.QwenBewerter = MagicMock(return_value="fake-bewerter")
        monkeypatch.setitem(sys.modules, "app.adapters.qwen_bewerter", fake_module)

        result = analyzer.get_default_bewerter()
        assert result == "fake-bewerter"


class TestLoadContextFile:
    def test_returns_text_when_file_exists(self, tmp_path, monkeypatch):
        from app import analyzer
        target = tmp_path / "test.txt"
        target.write_text("Hallo Welt")
        monkeypatch.setattr(analyzer, "KONTEXT_DIR", tmp_path)
        assert analyzer.load_context_file("test.txt") == "Hallo Welt"

    def test_returns_empty_when_file_missing(self, tmp_path, monkeypatch):
        from app import analyzer
        monkeypatch.setattr(analyzer, "KONTEXT_DIR", tmp_path)
        assert analyzer.load_context_file("missing.txt") == ""


class TestGetUserPromptTemplate:
    def test_returns_template_with_placeholders(self):
        from app.analyzer import get_user_prompt_template
        t = get_user_prompt_template()
        # Alle vier Platzhalter muessen drinstehen
        for ph in ("{bundesland_context}", "{quotes_context}",
                    "{text}", "{pflicht_fraktionen}"):
            assert ph in t


class TestGetBundeslandContext:
    def test_unknown_bundesland_raises(self):
        from app.analyzer import get_bundesland_context
        with pytest.raises(ValueError, match="Unbekanntes Bundesland"):
            get_bundesland_context("XX")

    def test_inactive_bundesland_raises(self, monkeypatch):
        from app import analyzer
        from app.bundeslaender import BUNDESLAENDER, Bundesland
        # Erstellen einer inaktiven BL-Instanz
        if "NRW" not in BUNDESLAENDER:
            pytest.skip("NRW nicht in BUNDESLAENDER")
        original = BUNDESLAENDER["NRW"]
        # Replace with inactive copy
        inactive = Bundesland(
            **{**original.__dict__, "aktiv": False}
        )
        monkeypatch.setitem(BUNDESLAENDER, "NRW", inactive)
        with pytest.raises(ValueError, match="nicht aktiv"):
            analyzer.get_bundesland_context("NRW")