import pytest
from types import SimpleNamespace
from docx import Document

from genesis.data_models import ParsedTemplate, ChapterMarker
from genesis.qa.qa_loop import QALoop
from genesis.writer.models import ChapterContent


class ImprovingEngine:
    def __init__(self):
        self.calls: dict[str, int] = {}

    def chat_structured(self, *, session_id, prompt, variables, schema, retry_count=2):
        cid = variables["title"]
        self.calls[cid] = self.calls.get(cid, 0) + 1
        n = self.calls[cid]
        # "a" 首次即通过；"b" 首次太短失败，第二次（n>=2）充分
        text = "充分且规范的说明内容，满足写入规则要求。" if (cid == "A" or n >= 2) else "x"
        return SimpleNamespace(data={"title": cid, "blocks": [{"type": "paragraph", "text": text}]}, status="ok")


def _make_template(path):
    doc = Document()
    doc.add_paragraph("A", style="Heading 1")
    doc.add_paragraph("{{section:a}}")
    doc.add_paragraph("B", style="Heading 1")
    doc.add_paragraph("{{section:b}}")
    doc.save(path)


def _ss(template_path):
    parsed = ParsedTemplate(
        file_name=template_path,
        sections=[
            ChapterMarker(type="heading", name="A", level=1),
            ChapterMarker(type="placeholder", name="section:a", level=0),
            ChapterMarker(type="heading", name="B", level=1),
            ChapterMarker(type="placeholder", name="section:b", level=0),
        ],
        placeholders={},
        styles={"defined": ["Heading 1"], "used": ["Heading 1"]},
    )
    return SimpleNamespace(template=parsed)


def test_qa_loop_regenerates_only_failed(tmp_path):
    tpl = tmp_path / "tpl.docx"
    out = tmp_path / "out.docx"
    _make_template(str(tpl))
    engine = ImprovingEngine()
    loop = QALoop(max_rounds=3)
    report = loop.run(_ss(str(tpl)), str(out), samples_dir="nonexistent_dir_xyz", engine=engine)
    assert report.passed is True
    assert engine.calls["A"] == 1   # A 首次即通过，未被重生成
    assert engine.calls["B"] == 2   # B 失败后被重生成一次