import base64
import filecmp
from itertools import zip_longest
from pathlib import Path
from typing import Dict, List, Optional

from dominate.tags import a, i, img, table, td, th, tr


def report_links(
    tests: List[Path], reports_path: Path, actual_hashes: Dict[str, str] = None
) -> None:
    if actual_hashes is None:
        actual_hashes = {}

    if not tests:
        i("None!")
        return
    with table(border=1):
        with tr():
            th("Link to report")
        for test in sorted(tests):
            with tr(data_actual_hash=actual_hashes.get(test.stem, "")):
                path = test.relative_to(reports_path)
                td(a(test.name, href=path))


def write(fixture_test_path: Path, doc, filename: str) -> Path:
    (fixture_test_path / filename).write_text(doc.render())
    return fixture_test_path / filename


def image(src: Path, image_width: Optional[int] = None) -> None:
    with td():
        if src:
            # open image file
            image = src.read_bytes()
            # encode image as base64
            image = base64.b64encode(image)
            # convert output to str
            image = image.decode()
            # img(src=src.relative_to(fixture_test_path))
            img(
                src="data:image/png;base64, " + image,
                style=f"width: {image_width}px; image-rendering: pixelated;"
                if image_width
                else "",
            )
        else:
            i("missing")


def diff_table(
    left_screens: List[Path],
    right_screens: List[Path],
    image_width: Optional[int] = None,
) -> None:
    for left, right in zip_longest(left_screens, right_screens):
        if left and right and filecmp.cmp(right, left):
            background = "white"
        else:
            background = "red"
        with tr(bgcolor=background):
            image(left, image_width)
            image(right, image_width)