#!/usr/bin/env python3
"""Generate Play Store feature graphics (1024x500) + store icon (512) for Tane.

Brand green #2F7D34, white sprout from the adaptive foreground, 'Tane' wordmark
in Noto Sans (the site's brand typeface), and the official value-proposition
tagline. On-brand and replaceable with a designed asset later.

Run from apps/app_seeds/:  python3 tool/gen_feature_graphic.py
"""
import os
from PIL import Image, ImageDraw, ImageFont

REPO_APP = "/home/vjrj/proyectos/dev/tane/.claude/worktrees/interesting-cray-6261fd/apps/app_seeds"
NOTO = "/usr/share/fonts/truetype/noto"
F_BOLD = f"{NOTO}/NotoSans-Bold.ttf"
F_MED = f"{NOTO}/NotoSans-Medium.ttf"
F_REG = f"{NOTO}/NotoSans-Regular.ttf"
FG = f"{REPO_APP}/assets/icon_foreground.png"
ICON = f"{REPO_APP}/assets/icon.png"

GREEN = (47, 125, 52)       # #2F7D34
GREEN_DARK = (34, 82, 30)   # #22521E
WHITE = (255, 255, 255)
FAINT = (208, 228, 210)

W, H = 1024, 500

# value line = what the app is (explains it); attrs = the differentiators.
COPY = {
    "en-US": ("Keep and share traditional seeds", "Offline   ·   Encrypted   ·   No account"),
    "es-ES": ("Guarda y comparte semillas tradicionales", "Sin conexión   ·   Cifrado   ·   Sin cuenta"),
}


def sprout(height):
    im = Image.open(FG).convert("RGBA")
    bb = im.getbbox()
    if bb:
        im = im.crop(bb)
    s = height / im.height
    return im.resize((max(1, int(im.width * s)), height), Image.LANCZOS)


def bg():
    top = Image.new("RGB", (W, H), GREEN)
    bot = Image.new("RGB", (W, H), GREEN_DARK)
    mask = Image.new("L", (W, H))
    md = ImageDraw.Draw(mask)
    for y in range(H):
        md.line([(0, y), (W, y)], fill=int(60 * (y / H)))
    return Image.composite(bot, top, mask)


def center_line(d, text, font, top, fill):
    b = d.textbbox((0, 0), text, font=font)
    w = b[2] - b[0]
    d.text(((W - w) / 2 - b[0], top - b[1]), text, font=font, fill=fill)
    return b[3] - b[1]


def feature_graphic(locale, out):
    img = bg()
    d = ImageDraw.Draw(img)
    value, attrs = COPY[locale]

    # Row 1: sprout + 'Tane', centered as a group in the upper half.
    spr = sprout(150)
    wf = ImageFont.truetype(F_BOLD, 120)
    wb = d.textbbox((0, 0), "Tane", font=wf)
    ww, wh = wb[2] - wb[0], wb[3] - wb[1]
    gap = 26
    gw = spr.width + gap + ww
    gx = (W - gw) // 2
    row_top = 92
    cy = row_top + spr.height / 2
    img.paste(spr, (gx, row_top), spr)
    d.text((gx + spr.width + gap - wb[0], cy - wh / 2 - wb[1]), "Tane", font=wf, fill=WHITE)
    y = row_top + spr.height + 34

    # Row 2: value proposition (explains the app).
    vf = ImageFont.truetype(F_MED, 42)
    y += center_line(d, value, vf, y, WHITE) + 18

    # Row 3: differentiators, quieter.
    af = ImageFont.truetype(F_REG, 30)
    center_line(d, attrs, af, y, FAINT)

    img.save(out, "PNG")
    print("wrote", out, img.size)


def store_icon(out):
    Image.open(ICON).convert("RGB").resize((512, 512), Image.LANCZOS).save(out, "PNG")
    print("wrote", out)


for loc in ("en-US", "es-ES"):
    d = f"{REPO_APP}/fastlane/metadata/android/{loc}/images"
    os.makedirs(d, exist_ok=True)
    feature_graphic(loc, f"{d}/featureGraphic.png")
    store_icon(f"{d}/icon.png")