from PIL import Image, ImageDraw, ImageFont
import os

# warm palette matching the app
BG_COLOR = (26, 23, 20)
AMBER = (200, 149, 108)
CREAM = (240, 236, 228)
DARK_ACCENT = (60, 50, 40)


def make_poster(title, key_sig, bpm, duration, out_path='poster.png'):
    """
    generates a simple album-art-style card for the analyzed track.
    no ML here, just pillow.
    """
    w, h = 800, 800
    img = Image.new('RGB', (w, h), BG_COLOR)
    draw = ImageDraw.Draw(img)

    # big warm circle as a vinyl record silhouette
    cx, cy = w // 2, h // 2 - 40
    radius = 240
    draw.ellipse(
        [cx - radius, cy - radius, cx + radius, cy + radius],
        fill=DARK_ACCENT,
        outline=AMBER,
        width=3
    )

    # inner circle (label area)
    inner_r = 80
    draw.ellipse(
        [cx - inner_r, cy - inner_r, cx + inner_r, cy + inner_r],
        fill=BG_COLOR,
        outline=AMBER,
        width=2
    )

    # spindle dot
    draw.ellipse([cx - 6, cy - 6, cx + 6, cy + 6], fill=AMBER)

    # grooves (concentric rings)
    for r in range(inner_r + 20, radius, 16):
        draw.ellipse(
            [cx - r, cy - r, cx + r, cy + r],
            outline=(50, 42, 34),
            width=1
        )

    # text below the record
    try:
        title_font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", 32)
        detail_font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 22)
        small_font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 16)
    except OSError:
        title_font = ImageFont.load_default()
        detail_font = title_font
        small_font = title_font

    # track title
    title_text = title if len(title) < 40 else title[:37] + '...'
    bbox = draw.textbbox((0, 0), title_text, font=title_font)
    tw = bbox[2] - bbox[0]
    draw.text(((w - tw) // 2, h - 200), title_text, fill=CREAM, font=title_font)

    # key + bpm line
    info_text = f"{key_sig}  ·  {bpm} BPM  ·  {duration:.1f}s"
    bbox = draw.textbbox((0, 0), info_text, font=detail_font)
    tw = bbox[2] - bbox[0]
    draw.text(((w - tw) // 2, h - 150), info_text, fill=AMBER, font=detail_font)

    # coda branding
    brand = "CODA"
    bbox = draw.textbbox((0, 0), brand, font=small_font)
    tw = bbox[2] - bbox[0]
    draw.text(((w - tw) // 2, h - 60), brand, fill=(100, 85, 70), font=small_font)

    img.save(out_path)
    return out_path