from __future__ import annotations

from pathlib import Path

from PIL import Image, ImageDraw, ImageFont, ImageOps


REPO_ROOT = Path(__file__).resolve().parents[1]
OUTPUT_DIR = (
    REPO_ROOT
    / "public"
    / "branding"
    / "taonier-logo-hand-spirit-ref01-logo-refine-concepts"
)
CONTACT_SHEET_PATH = OUTPUT_DIR / "taonier-logo-hand-spirit-ref01-logo-refine-contact-sheet.png"
REFERENCE_IMAGE = (
    REPO_ROOT
    / "public"
    / "branding"
    / "taonier-logo-hand-spirit-concepts"
    / "taonier-hand-spirit-01-gentle-hand-spirit.png"
)

ITEMS = [
    ("REF 原01", REFERENCE_IMAGE),
    ("01 扁平珊瑚奶白", "taonier-hand-spirit-ref01-logo-refine-01-flat-coral-cream"),
    ("02 暖陶精品色", "taonier-hand-spirit-ref01-logo-refine-02-warm-clay-premium"),
    ("03 青绿托举线", "taonier-hand-spirit-ref01-logo-refine-03-mint-support"),
    ("04 线面商标", "taonier-hand-spirit-ref01-logo-refine-04-outline-vector"),
    ("05 双形抽象", "taonier-hand-spirit-ref01-logo-refine-05-abstract-two-shape"),
    ("06 黑白优先", "taonier-hand-spirit-ref01-logo-refine-06-monochrome-first"),
    ("07 轻渐变精品", "taonier-hand-spirit-ref01-logo-refine-07-soft-gradient-premium"),
    ("08 头像强识别", "taonier-hand-spirit-ref01-logo-refine-08-compact-avatar"),
]


def load_font(size: int) -> ImageFont.FreeTypeFont | ImageFont.ImageFont:
    candidates = [
        Path("C:/Windows/Fonts/msyh.ttc"),
        Path("C:/Windows/Fonts/simhei.ttf"),
        Path("C:/Windows/Fonts/simsun.ttc"),
    ]
    for candidate in candidates:
        if candidate.exists():
            return ImageFont.truetype(str(candidate), size)
    return ImageFont.load_default()


def find_image(stem_or_path: str | Path) -> Path | None:
    if isinstance(stem_or_path, Path):
        return stem_or_path if stem_or_path.exists() else None
    for extension in ("png", "webp", "jpg", "jpeg"):
        candidate = OUTPUT_DIR / f"{stem_or_path}.{extension}"
        if candidate.exists():
            return candidate
    return None


def composite_on(image: Image.Image, color: str) -> Image.Image:
    rgba = image.convert("RGBA")
    background = Image.new("RGBA", rgba.size, color)
    background.alpha_composite(rgba)
    return background.convert("RGB")


def normalize_square(image_path: Path) -> Image.Image:
    image = Image.open(image_path).convert("RGBA")
    if image.size == (1024, 1024):
        normalized = image
    elif image.width == image.height:
        normalized = image.resize((1024, 1024), Image.Resampling.LANCZOS)
    else:
        contained = ImageOps.contain(image, (1024, 1024), Image.Resampling.LANCZOS)
        normalized = Image.new("RGBA", (1024, 1024), (255, 253, 248, 255))
        x = (1024 - contained.width) // 2
        y = (1024 - contained.height) // 2
        normalized.alpha_composite(contained, (x, y))

    if image_path.is_relative_to(OUTPUT_DIR) and image.size != (1024, 1024):
        normalized.convert("RGB").save(image_path, quality=95)
    return composite_on(normalized, "#fffdf8")


def bw_preview(image: Image.Image, size: int) -> Image.Image:
    thumb = ImageOps.grayscale(image).resize((size, size), Image.Resampling.LANCZOS)
    return ImageOps.autocontrast(thumb).convert("RGB")


def main() -> None:
    cell_size = 268
    label_height = 54
    test_height = 44
    gap = 22
    columns = 3
    rows = 3
    cell_total_height = cell_size + label_height + test_height
    width = columns * cell_size + (columns + 1) * gap
    height = rows * cell_total_height + (rows + 1) * gap

    sheet = Image.new("RGB", (width, height), "#f0ebe5")
    draw = ImageDraw.Draw(sheet)
    label_font = load_font(18)
    test_font = load_font(13)

    for index, (label, stem_or_path) in enumerate(ITEMS):
        row = index // columns
        column = index % columns
        x = gap + column * (cell_size + gap)
        y = gap + row * (cell_total_height + gap)

        image_path = find_image(stem_or_path)
        if image_path is None:
            continue

        source = normalize_square(image_path)
        thumbnail = source.resize((cell_size, cell_size), Image.Resampling.LANCZOS)
        sheet.paste(thumbnail, (x, y))

        draw.rounded_rectangle(
            (x, y + cell_size, x + cell_size, y + cell_size + label_height),
            radius=8,
            fill="#fffdf8",
        )
        text_box = draw.textbbox((0, 0), label, font=label_font)
        text_x = x + (cell_size - (text_box[2] - text_box[0])) / 2
        text_y = y + cell_size + (label_height - (text_box[3] - text_box[1])) / 2 - 2
        draw.text((text_x, text_y), label, fill="#302a25", font=label_font)

        test_y = y + cell_size + label_height
        draw.rounded_rectangle(
            (x, test_y, x + cell_size, test_y + test_height),
            radius=8,
            fill="#f7f3ed",
        )
        tiny = source.resize((32, 32), Image.Resampling.LANCZOS)
        mono = bw_preview(source, 32)
        sheet.paste(tiny, (x + 52, test_y + 6))
        sheet.paste(mono, (x + 104, test_y + 6))
        draw.text((x + 150, test_y + 13), "32px / BW", fill="#5c5148", font=test_font)

    OUTPUT_DIR.mkdir(parents=True, exist_ok=True)
    sheet.save(CONTACT_SHEET_PATH, quality=95)
    print(CONTACT_SHEET_PATH)


if __name__ == "__main__":
    main()