from pathlib import Path

import pytest

from fpdf import FPDF
from test.conftest import assert_pdf_equal, LOREM_IPSUM

HERE = Path(__file__).resolve().parent
FONTS_DIR = HERE.parent / "fonts"


def test_write_page_break(tmp_path):
    doc = FPDF()
    doc.add_page()
    doc.set_font("helvetica", size=24)
    doc.y = 20
    doc.write(text=LOREM_IPSUM)
    doc.write(text=LOREM_IPSUM)
    assert_pdf_equal(doc, HERE / "write_page_break.pdf", tmp_path)


def test_write_soft_hyphen(tmp_path):
    """
    The current behaviour is close to CSS word-break: break-all
    cf. https://developer.mozilla.org/en-US/docs/Web/CSS/overflow-wrap#comparing_overflow-wrap_word-break_and_hyphens
    We used to prefer a line break over a word split without regards to soft hyphens:
    https://github.com/py-pdf/fpdf2/blob/2.7.4/test/text/write_soft_hyphen.pdf
    But that caused issue with write_html(), cf. issue #847
    """
    s = "Donau\u00addamp\u00adfschiff\u00adfahrts\u00adgesellschafts\u00adkapitäns\u00admützen\u00adstreifen. "
    doc = FPDF()
    doc.add_page()
    doc.set_font("helvetica", size=24)
    doc.y = 20
    doc.write(text=s)
    doc.set_font("helvetica", size=24, style="B")
    doc.write(text=s)
    doc.set_font("helvetica", size=24, style="I")
    doc.write(text=s)
    doc.set_font("helvetica", size=24)
    doc.write(text=s)
    doc.set_font("helvetica", size=24, style="B")
    doc.write(text=s)
    doc.set_font("helvetica", size=24, style="I")
    doc.write(text=s)
    doc.set_font("helvetica", size=24)
    doc.write(text=s)
    assert_pdf_equal(doc, HERE / "write_soft_hyphen.pdf", tmp_path)


def test_write_trailing_nl(tmp_path):  # issue #455
    """Each item in lines triggers a line break at the end."""
    pdf = FPDF()
    pdf.add_page()
    pdf.set_font("Times", size=16)
    lines = ["Hello\n", "Sweet\n", "World\n"]
    for line in lines:
        pdf.write(text=line)
    pdf.write(text="end_mmc")
    assert_pdf_equal(pdf, HERE / "write_trailing_nl.pdf", tmp_path)


@pytest.mark.skip(reason="Font related tests are failing with the fonts available in Debian")
def test_write_font_stretching(tmp_path):  # issue #478
    right_boundary = 60
    pdf = FPDF()
    pdf.add_page()
    # built-in font
    pdf.set_font("Helvetica", size=8)
    pdf.set_right_margin(pdf.w - right_boundary)
    pdf.write(text=LOREM_IPSUM[:100])
    pdf.ln()
    pdf.ln()
    pdf.set_stretching(150)
    pdf.write(text=LOREM_IPSUM[:100])
    pdf.ln()
    pdf.ln()
    # unicode font
    pdf.set_stretching(100)
    pdf.add_font(fname=FONTS_DIR / "DroidSansFallback.ttf")
    pdf.set_font("DroidSansFallback", size=8)
    pdf.write(text=LOREM_IPSUM[:100])
    pdf.ln()
    pdf.ln()
    pdf.set_stretching(150)
    pdf.write(text=LOREM_IPSUM[:100])
    # for reference, in lieu of a colored background
    pdf.line(pdf.l_margin, 10, pdf.l_margin, 100)
    pdf.line(right_boundary, 10, right_boundary, 100)
    assert_pdf_equal(pdf, HERE / "write_font_stretching.pdf", tmp_path)


def test_write_superscript(tmp_path):
    pdf = FPDF()
    pdf.add_page()
    pdf.set_font("Helvetica", size=20)

    def write_this():
        pdf.write(text="2")
        pdf.char_vpos = "SUP"
        pdf.write(text="56")
        pdf.char_vpos = "LINE"
        pdf.write(text=" more line text")
        pdf.char_vpos = "SUB"
        pdf.write(text="(idx)")
        pdf.char_vpos = "LINE"
        pdf.write(text=" end")
        pdf.ln()
        pdf.ln()
        pdf.write(text="1234 + ")
        pdf.char_vpos = "NOM"
        pdf.write(text="5")
        pdf.char_vpos = "LINE"
        pdf.write(text="/")
        pdf.char_vpos = "DENOM"
        pdf.write(text="16")
        pdf.char_vpos = "LINE"
        pdf.write(text=" + 987 = x")
        pdf.ln()
        pdf.ln()
        pdf.ln()

    write_this()
    pdf.sub_scale = 0.5
    pdf.sup_scale = 0.5
    pdf.nom_scale = 0.5
    pdf.denom_scale = 0.5
    write_this()
    pdf.sub_lift = 0.0
    pdf.sup_lift = 0.0
    pdf.nom_lift = 0.0
    pdf.denom_lift = 0.0
    write_this()
    pdf.sub_lift = 1.0
    pdf.sup_lift = 1.0
    pdf.nom_lift = 1.0
    pdf.denom_lift = 1.0
    write_this()
    assert_pdf_equal(pdf, HERE / "write_superscript.pdf", tmp_path)


def test_write_char_wrap(tmp_path):  # issue #649
    right_boundary = 50
    pdf = FPDF()
    pdf.add_page()
    pdf.set_right_margin(pdf.w - right_boundary)
    pdf.set_font("Helvetica", size=10)
    pdf.write(text=LOREM_IPSUM[:200])
    pdf.ln()
    pdf.ln()
    pdf.write(text=LOREM_IPSUM[:200], wrapmode="CHAR")
    pdf.ln()
    pdf.ln()
    pdf.set_font("Courier", size=10)
    txt = "     " + "abcdefghijklmnopqrstuvwxyz" * 3
    pdf.write(text=txt)
    pdf.ln()
    pdf.ln()
    pdf.write(text=txt, wrapmode="CHAR")
    pdf.line(pdf.l_margin, 10, pdf.l_margin, 130)
    pdf.line(right_boundary, 10, right_boundary, 130)
    assert_pdf_equal(pdf, HERE / "write_char_wrap.pdf", tmp_path)


def test_write_overflow_no_initial_newline(tmp_path):  # issue-847
    pdf = FPDF()
    pdf.add_page()
    pdf.set_font(family="Helvetica", size=20)
    pdf.write(7, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX")
    assert_pdf_equal(pdf, HERE / "write_overflow_no_initial_newline.pdf", tmp_path)


def test_write_empty():
    # Feeding an empty string to write() should not have any effect
    # on the internal state of the library.
    pdf = FPDF()
    pdf.add_page()
    pdf.set_font(family="Helvetica", size=20)
    x = pdf.x
    y = pdf.y
    pdf.write(None, "")
    assert (
        pdf.x == x and pdf.y == y
    ), f"write('') has changed pdf.x ({pdf.x} from {x}) or pdf.x ({pdf.y} from {y})"


def test_write_deprecated_txt_arg():
    pdf = FPDF()
    pdf.add_page()
    pdf.set_font("Helvetica", size=10)
    with pytest.warns(
        DeprecationWarning, match='The parameter "txt" has been renamed to "text"'
    ):
        # pylint: disable=unexpected-keyword-arg
        pdf.write(txt="Lorem ipsum Ut nostrud irure")