"""深夜茶馆 cover.png 生成：1080x1920，深巷夜色底 + 灯笼暖光 + 茶烟 + 游戏名 + 玩法提示。"""
import math
import random

from PIL import Image, ImageDraw, ImageFilter, ImageChops

W, H = 1080, 1920
FONT = "/usr/share/fonts/opentype/noto/NotoSansCJK-Bold.ttc"
OUT = "/home/xsl/AutoVideo/SoundGame/web/teahouse/cover.png"

random.seed(20)

img = Image.new("RGB", (W, H))
px = img.load()
# 深巷夜色渐变：上 #0a0d16 -> 下 #1c130a（底部灯笼映暖）
top, bottom = (10, 13, 22), (28, 19, 10)
for y in range(H):
    t = y / (H - 1)
    for x in range(W):
        px[x, y] = tuple(int(a + (b - a) * t) for a, b in zip(top, bottom))

d = ImageDraw.Draw(img)
# 星点（稀疏，都市夜空）
for _ in range(140):
    x, y = random.randint(0, W - 1), random.randint(0, int(H * 0.4))
    c = random.randint(90, 180)
    d.point((x, y), fill=(c, c, min(255, c + 10)))

# 两侧屋檐剪影（巷子纵深）
d.polygon([(0, 0), (W * 0.30, 0), (W * 0.16, H * 0.34), (0, H * 0.42)], fill=(6, 7, 12))
d.polygon([(W, 0), (W * 0.70, 0), (W * 0.84, H * 0.34), (W, H * 0.42)], fill=(6, 7, 12))

# 巷子尽头茶馆门脸亮窗（暖光小方块）
d.rectangle([W * 0.42, H * 0.40, W * 0.58, H * 0.47], fill=(64, 42, 18))
d.rectangle([W * 0.44, H * 0.415, W * 0.56, H * 0.455], fill=(120, 78, 30))

# 主灯笼（中上，暖橙光晕两层）
cx, cy = W / 2, H * 0.30
glow = Image.new("RGB", (W, H), (0, 0, 0))
gg = ImageDraw.Draw(glow)
gg.ellipse([cx - W * 0.26, cy - W * 0.26, cx + W * 0.26, cy + W * 0.26], fill=(52, 30, 10))
glow = glow.filter(ImageFilter.GaussianBlur(60))
img = ImageChops.add(img, glow)
d = ImageDraw.Draw(img)
# 灯笼体：椭圆 + 骨架线
d.ellipse([cx - W * 0.115, cy - H * 0.052, cx + W * 0.115, cy + H * 0.052], fill=(196, 84, 32))
for k in range(-3, 4):
    xk = cx + k * W * 0.028
    d.arc([xk - W * 0.10, cy - H * 0.052, xk + W * 0.10, cy + H * 0.052],
          start=300 if k < 0 else 240, end=420 if k > 0 else 60, fill=(140, 56, 20), width=3)
d.rectangle([cx - W * 0.03, cy - H * 0.062, cx + W * 0.03, cy - H * 0.050], fill=(120, 96, 40))
d.rectangle([cx - W * 0.03, cy + H * 0.050, cx + W * 0.03, cy + H * 0.062], fill=(120, 96, 40))
# 灯穗
d.line([cx, cy + H * 0.062, cx, cy + H * 0.095], fill=(160, 40, 30), width=6)

# 茶烟（灯笼上方，淡灰曲线）
smoke = Image.new("RGBA", (W, H), (0, 0, 0, 0))
sd = ImageDraw.Draw(smoke)
for i in range(3):
    pts = []
    for t in range(60):
        u = t / 59
        x = cx + math.sin(u * 6 + i * 2) * 34 * (1 - u * 0.4) + (i - 1) * 26
        y = cy - H * 0.075 - u * H * 0.16
        pts.append((x, y))
    sd.line(pts, fill=(180, 180, 190, 46), width=10)
smoke = smoke.filter(ImageFilter.GaussianBlur(6))
img.paste(Image.alpha_composite(img.convert("RGBA"), smoke).convert("RGB"), (0, 0))

# 底部茶盏剪影 + 涟漪声纹环（声音主题）
d = ImageDraw.Draw(img)
bcx, bcy = W / 2, H * 0.74
d.ellipse([bcx - 130, bcy - 40, bcx + 130, bcy + 60], fill=(14, 10, 8))
d.ellipse([bcx - 108, bcy - 28, bcx + 108, bcy + 34], fill=(46, 30, 14))
for r, a in [(230, 60), (300, 40), (370, 24)]:
    d.arc([bcx - r, bcy - r * 0.36, bcx + r, bcy + r * 0.36], start=200, end=340,
          fill=(90, 66, 34), width=4)

# 文字
from PIL import ImageFont
def font(sz):
    return ImageFont.truetype(FONT, sz)

d.text((W / 2, H * 0.56), "深夜茶馆", font=font(120), fill=(240, 226, 200), anchor="mm")
d.text((W / 2, H * 0.615), "茶是热的，夜是长的", font=font(40), fill=(200, 178, 140), anchor="mm")
d.text((W / 2, H * 0.885), "左右滑选茶 · 双击提壶出汤 · 上滑状态 · 下滑菜单",
       font=font(34), fill=(170, 158, 138), anchor="mm")
d.text((W / 2, H * 0.925), "纯音频手势游戏 · 戴上耳机更佳",
       font=font(30), fill=(130, 122, 108), anchor="mm")

img.save(OUT)
print("saved", OUT)