"""M02 도면 양식 — 작도 영역 칸 · B07 도각 층(프로젝트 작업본 → 시스템) (PLAN 10-3)."""

import json

from B07_DesignDetail import B07_DesignDetail_Engine_Template as engine
from M02_MasterTemplete import M02_Template_Layers as layers

A1 = engine.A1_TEMPLATE


def _project_template(project_root, document):
    path = engine.project_template_path(project_root)
    path.parent.mkdir(parents=True)
    path.write_text(json.dumps(document), encoding="utf-8")
    return path


def _entities(project_root):
    engine.use_project_templates(project_root)
    try:
        return engine.template_entities()
    finally:
        engine.use_project_templates(None)


def test_system_a1_reads_drawing_area():
    engine.use_project_templates(None)
    assert engine.drawing_area() == (42.0, 47.0, 812.0, 567.0)
    assert len(engine.template_entities()) == 51


def test_missing_area_falls_back_to_a1(tmp_path):
    _project_template(tmp_path, {"format": 6, "entities": [], "layers": []})
    engine.use_project_templates(tmp_path)
    try:
        assert engine.drawing_area() == engine._A1_INNER
    finally:
        engine.use_project_templates(None)


def test_template_area_moves_content(tmp_path):
    line = {
        "id": "a",
        "type": "Line",
        "shapeData": {"startPoint": {"x": 0, "y": 0}, "endPoint": {"x": 10, "y": 0}},
    }
    _project_template(
        tmp_path,
        {"format": 6, "drawing_area": [0, 0, 400, 200], "entities": [line], "layers": []},
    )
    engine.use_project_templates(tmp_path)
    try:
        assert engine.drawing_area() == (0.0, 0.0, 400.0, 200.0)
        assert engine.usable_area() == (400 * 0.96, 200 * 0.96)
        # 콘텐츠 중심(500, 500) 이 작도 영역 중심(200, 100) 에 온다 — 이동량 (300, 400).
        placed = engine.frame_entities("t", (490.0, 490.0, 510.0, 510.0), fit=False)
        assert placed[0]["shapeData"]["startPoint"] == {"x": 300.0, "y": 400.0}
    finally:
        engine.use_project_templates(None)


def test_bad_area_falls_back(tmp_path):
    _project_template(tmp_path, {"drawing_area": [10, 10, 5, 5], "entities": []})
    engine.use_project_templates(tmp_path)
    try:
        assert engine.drawing_area() == engine._A1_INNER
    finally:
        engine.use_project_templates(None)


def test_old_project_reads_system(tmp_path):
    # 작업본이 없는 옛 프로젝트 — 시스템 양식으로 떨어진다.
    assert len(_entities(tmp_path)) == 51
    assert engine.is_project_template_customized(tmp_path) is False


def test_save_reset_on_seeded_project(tmp_path):
    layers.seed_project(tmp_path)
    assert engine.project_template_path(tmp_path).is_file()
    assert engine.is_project_template_customized(tmp_path) is False

    # [완료] — 작업본에만 쓴다 · 작도 영역은 이어 받는다 · `_initial/` · 시스템은 그대로.
    path = engine.save_project_template(tmp_path, [])
    saved = json.loads(path.read_text(encoding="utf-8"))
    assert saved["drawing_area"] == [42, 47, 812, 567]
    assert _entities(tmp_path) == []
    assert engine.is_project_template_customized(tmp_path) is True
    initial = layers.template_path(layers.initial_dir(tmp_path), "drawing", A1)
    assert len(json.loads(initial.read_text(encoding="utf-8"))["entities"]) == 51
    assert (
        len(json.loads(engine.system_template_path().read_text(encoding="utf-8"))["entities"]) == 51
    )

    # [기본 도각으로] — `_initial/` 을 작업본에 덮어쓴다.
    assert engine.reset_project_template(tmp_path) is True
    assert len(_entities(tmp_path)) == 51
    assert engine.is_project_template_customized(tmp_path) is False


def test_reset_on_old_project_drops_to_system(tmp_path):
    engine.save_project_template(tmp_path, [])
    assert _entities(tmp_path) == []
    assert engine.reset_project_template(tmp_path) is True
    assert not engine.project_template_path(tmp_path).exists()
    assert len(_entities(tmp_path)) == 51
    assert engine.reset_project_template(tmp_path) is False