"""generator unit tests (test-after, Standard strategy).

Covers: config/content ingestion, markdown→article fidelity (NFR7), layout +
pagination (page breaks/running headers), self-contained zero-network emit
(NFR4), empty-state (US10), no-fabricated-photos (FR7.4), graceful no-AI-draft
(BR4.1), funnies embedding (US3).
"""

from __future__ import annotations

import json
import tempfile
from pathlib import Path

from newspaper.generator import (
    load_config,
    load_content,
    run_generate,
    build_layout,
    emit_empty_state,
    emit_newspaper,
)
from newspaper.generator.model import Article, Issue, MastheadConfig


def _sample_project(tmp: Path, content: dict | None = None, article: str | None = None) -> None:
    cfg = tmp / "config.json"
    cfg.write_text(json.dumps(content or {
        "title": "The Wedding Times", "couple_names": "Sam & Alex",
        "date_line": "14 Sep", "issue_number": "1", "volume": "1",
    }))
    (tmp / "content").mkdir(exist_ok=True)
    if article is not None:
        (tmp / "content" / "lead.md").write_text(article)


def test_config_loads_masthead():
    with tempfile.TemporaryDirectory() as d:
        tmp = Path(d)
        _sample_project(tmp)
        m = load_config(tmp / "config.json")
        assert m.title == "The Wedding Times"
        assert m.couple_names == "Sam & Alex"


def test_parse_article_fidelity():
    md = "---\nheadline: The Big Day\nbyline: Sam & Alex\n---\nVows said & dancing began."
    with tempfile.TemporaryDirectory() as d:
        tmp = Path(d)
        _sample_project(tmp, article=md)
        arts = load_content(tmp / "content")
        assert len(arts) == 1
        a = arts[0]
        assert "&" in a.body and "&" in a.headline  # no mangled escaping


def test_empty_content_emits_guided_empty_state():
    with tempfile.TemporaryDirectory() as d:
        tmp = Path(d)
        _sample_project(tmp)
        out = run_generate(tmp)
        assert out.name == "newspaper.html"
        text = out.read_text()
        assert "Welcome" in text  # friendly empty-state, not blank


def test_layout_flows_pages_with_running_headers():
    arts = [Article(f"a{i}", "article", f"Head {i}", "Body" * 20, "", "News") for i in range(9)]
    pages = build_layout(arts)
    assert len(pages) >= 1
    assert all(p.running_header for p in pages)


def test_emitted_newspaper_is_self_contained():
    with tempfile.TemporaryDirectory() as d:
        tmp = Path(d)
        mh = MastheadConfig("T", "C", "d", "1", "1")
        issue = Issue("i", mh, [Article("a1", "article", "H", "B", "", "News")], build_layout([Article("a1", "article", "H", "B", "", "News")]))
        out = tmp / "newspaper.html"
        emit_newspaper(issue, out)
        text = out.read_text()
        assert "http://" not in text and "https://" not in text  # NFR4 no remote


def test_no_photos_no_fabricated_images():
    with tempfile.TemporaryDirectory() as d:
        tmp = Path(d)
        _sample_project(tmp, article="Just text, no photos.")
        out = run_generate(tmp)
        assert "<img" not in out.read_text()  # FR7.4 no fabricated placeholders


def test_draft_unavailable_builds_without_ai():
    with tempfile.TemporaryDirectory() as d:
        tmp = Path(d)
        _sample_project(tmp, article="Story one.")
        out = run_generate(tmp, draft=True)
        assert out.exists() and "Story one." in out.read_text()  # fallback to human copy


def test_funnies_embedded():
    from newspaper.funnies import FunniesBuilder, FunniesBrief
    result = FunniesBuilder().build(FunniesBrief(theme_words=["sam", "alex"], context="wedding"))
    assert result.status in ("ready", "fallback")