"""Generate /public/og.png — a 1200x630 Open Graph image for Diesel Depot.

Brand-styled card with the logo on the left, big name + tagline on the right.
Used for WhatsApp / Twitter / Facebook link previews of depot.apphub.co.za.
"""
from PIL import Image, ImageDraw, ImageFont
import os

OUT = os.path.join(os.path.dirname(__file__), "..", "Volumes/EXT/DEVELOPMENT/MINIMAX/DIESEL_DEPOT/public/og.png")
OUT = "/Volumes/EXT/DEVELOPMENT/MINIMAX/DIESEL_DEPOT/public/og.png"
LOGO = "/Volumes/EXT/DEVELOPMENT/MINIMAX/DIESEL_DEPOT/public/logo.png"

# Brand colours — keep aligned with the CSS theme.
PRIMARY = (26, 122, 82)   # #1a7a52  (manifest theme-color)
PRIMARY_DARK = (20, 96, 64)
ACCENT = (255, 255, 255)
MUTED = (210, 235, 220)

W, H = 1200, 630
img = Image.new("RGB", (W, H), PRIMARY)
d = ImageDraw.Draw(img)

# Subtle diagonal gradient (primary → primary_dark) for depth. PIL doesn't
# do real gradients natively, so fake one with a few horizontal bands.
for y in range(H):
    t = y / H
    r = int(PRIMARY[0] * (1 - t) + PRIMARY_DARK[0] * t)
    g = int(PRIMARY[1] * (1 - t) + PRIMARY_DARK[1] * t)
    b = int(PRIMARY[2] * (1 - t) + PRIMARY_DARK[2] * t)
    d.line([(0, y), (W, y)], fill=(r, g, b))

# Fonts — prefer Helvetica for a clean sans, fall back to PIL default.
def load_font(size, bold=False):
    candidates = [
        "/System/Library/Fonts/Helvetica.ttc",
        "/Library/Fonts/Arial Unicode.ttf",
    ]
    for c in candidates:
        if os.path.exists(c):
            try:
                return ImageFont.truetype(c, size, index=1 if bold else 0)
            except Exception:
                continue
    return ImageFont.load_default()

f_title = load_font(96, bold=True)
f_sub   = load_font(36)
f_foot  = load_font(26)

# Logo on the left, vertically centred. Resize to a target height.
logo = Image.open(LOGO).convert("RGBA")
target_h = 340
ratio = target_h / logo.height
logo = logo.resize((int(logo.width * ratio), target_h), Image.LANCZOS)
logo_x = 80
logo_y = (H - logo.height) // 2
img.paste(logo, (logo_x, logo_y), logo)

# Title — "Diesel Depot"
text_x = logo_x + logo.width + 60
title = "Diesel Depot"
bbox = d.textbbox((0, 0), title, font=f_title)
title_w = bbox[2] - bbox[0]
# If still too wide, shrink to fit
if text_x + title_w > W - 60:
    f_title = load_font(80, bold=True)
    bbox = d.textbbox((0, 0), title, font=f_title)
    title_w = bbox[2] - bbox[0]
d.text((text_x, 210), title, font=f_title, fill=ACCENT)

# Tagline
tag = "Depot & fleet management"
bbox = d.textbbox((0, 0), tag, font=f_sub)
d.text((text_x, 350), tag, font=f_sub, fill=MUTED)

# Bottom line
foot = "depot.apphub.co.za"
d.text((60, H - 60), foot, font=f_foot, fill=MUTED)

# A small "fuel drop" accent in the bottom-right corner (matches the logo)
d.polygon([(W - 90, H - 30), (W - 60, H - 60), (W - 30, H - 30)], fill=(232, 160, 42))  # amber accent

img.save(OUT, "PNG", optimize=True)
print(f"Wrote {OUT} ({os.path.getsize(OUT)} bytes)")