from copy import copy

from openpyxl import Workbook
from openpyxl.comments import Comment

from genesis.data_models import CellComment, CellFormatting
from genesis.parsers.formatting_detector import (
    cell_comment, cell_formatting, collect_comments,
)


def make_wb():
    wb = Workbook()
    ws = wb.active
    ws.title = "機能一覧"
    ws["A1"] = "F001"
    font = copy(ws["A1"].font)
    font.strike = True
    ws["A1"].font = font
    ws["A2"] = "F002"
    ws["A2"].comment = Comment("要確認", "reviewer")
    return wb


def test_cell_formatting_detects_strike():
    fmt = cell_formatting(make_wb().active["A1"])
    assert fmt is not None
    assert fmt.strikethrough is True


def test_cell_formatting_none_when_plain():
    wb = Workbook()
    ws = wb.active
    ws["A1"] = "x"
    assert cell_formatting(ws["A1"]) is None


def test_cell_formatting_detects_font_color():
    from openpyxl.styles import Font
    wb = Workbook()
    ws = wb.active
    ws["A1"] = "x"
    f = copy(ws["A1"].font)
    f.color = Font(color="FF0000FF").color
    ws["A1"].font = f
    fmt = cell_formatting(ws["A1"])
    assert fmt is not None
    assert fmt.font_color is not None


def test_cell_comment_returns_obj():
    wb = make_wb()
    cm = cell_comment(wb.active["A2"], "f.xlsx")
    assert isinstance(cm, CellComment)
    assert cm.author == "reviewer"
    assert cm.text == "要確認"
    assert cm.source_uri == "f.xlsx#機能一覧!A2"


def test_collect_comments():
    comments = collect_comments(make_wb().active, "f.xlsx")
    assert len(comments) == 1


def test_to_rgb_hex_accepts_6_digit_hex():
    from types import SimpleNamespace
    from genesis.parsers.formatting_detector import _to_rgb_hex
    assert _to_rgb_hex(SimpleNamespace(rgb="FF3333")) == "FF3333"
    assert _to_rgb_hex(SimpleNamespace(rgb="00FF00FF")) == "00FF00FF"


def test_to_rgb_hex_rejects_black_and_theme():
    from types import SimpleNamespace
    from genesis.parsers.formatting_detector import _to_rgb_hex
    # 纯黑（默认色）与主题色（rgb 为空/异常/非 hex）→ None
    assert _to_rgb_hex(SimpleNamespace(rgb="00000000")) is None
    assert _to_rgb_hex(SimpleNamespace(rgb="FF000000")) is None
    assert _to_rgb_hex(SimpleNamespace(rgb="")) is None
    assert _to_rgb_hex(SimpleNamespace(rgb="ZZZZZZ")) is None
    assert _to_rgb_hex(SimpleNamespace(rgb="FFFFF")) is None  # 长度不足


class _ExplodingRgb:
    @property
    def rgb(self):
        raise Exception("boom")


def test_to_rgb_hex_rgb_access_exception_returns_none():
    from genesis.parsers.formatting_detector import _to_rgb_hex
    # L15-16：color.rgb 访问抛异常 → 返回 None（防御分支）
    assert _to_rgb_hex(_ExplodingRgb()) is None


def test_cell_formatting_fills_only_color():
    from copy import copy
    from openpyxl.styles import PatternFill
    from genesis.parsers.formatting_detector import cell_formatting
    wb = Workbook()
    ws = wb.active
    ws["A1"] = "x"
    # 仅背景色（无 strikethrough / 无字体色）→ 返回 CellFormatting 含 bg_color
    f = copy(ws["A1"].fill)
    f.fgColor = PatternFill(start_color="00CC00").fgColor
    ws["A1"].fill = f
    fmt = cell_formatting(ws["A1"])
    assert fmt is not None
    assert fmt.bg_color is not None


def test_cell_formatting_fill_none_branch():
    # 覆盖 L31 防御分支：fill 为 None（无样式对象）时直接返回 None
    from types import SimpleNamespace
    from genesis.parsers.formatting_detector import cell_formatting
    fake = SimpleNamespace(font=SimpleNamespace(strike=False), fill=None)
    assert cell_formatting(fake) is None