#!/usr/bin/env python3
"""
Indian-style animated retirement invitation for Mamta: 1080x1920, 30fps, H.264 + AAC MP4.
Maroon/gold palette, rotating mandala, marigold toran, flickering diyas, colour emoji.
v5: her exact quote wording + original synthesised soundtrack (tanpura, sitar melody, bells).
"""
import os, math, subprocess, urllib.request, random, wave
import numpy as np
from PIL import Image, ImageDraw, ImageFont, ImageFilter, features

W, H, FPS = 1080, 1920, 30
SR = 44100
OUT = "/tmp/mamta_retirement_invitation.mp4"
WAV = "/tmp/soundtrack.wav"
POSTER = "/tmp/poster.jpg"
FDIR = "/tmp/fonts"
os.makedirs(FDIR, exist_ok=True)

BG_TOP, BG_BOT = (78, 15, 36), (44, 7, 20)
GOLD, GOLD_D, GOLD_L = (232, 193, 115), (201, 150, 47), (245, 222, 166)
CREAM, MARIGOLD, ORANGE = (253, 243, 224), (240, 160, 42), (226, 112, 28)
SOFT = (246, 234, 212)

# ----------------------------------------------------------------- event text
EV = dict(
    name="Mamta",
    hindi="\u0936\u0941\u092d \u0938\u0947\u0935\u093e\u0928\u093f\u0935\u0943\u0924\u094d\u0924\u093f",
    kicker1_en="WITH GREAT JOY",
    script1="You\u2019re Invited",
    sub1="a celebration of a beautiful journey",
    kicker2="IN HONOUR OF",
    body2="on the joyous occasion of her retirement",
    small2="30 SEPTEMBER 2026",
    message=[
        dict(kind="bodyi", size=54, color=CREAM, weight=600,
             lines=["\u201cThe bell is ringing one last time\u2026\u201d"]),
        dict(kind="serif", size=48, color=CREAM, weight=500,
             lines=["It is now time to say goodbye", "to my teaching profession."]),
        dict(kind="serif", size=46, color=CREAM, weight=500,
             lines=["To seek your good wishes & blessings,", "a party has been organised."]),
    ],
    msg_sig="\u2014 Mamta",
    msg_foot="A LIFETIME OF TEACHING",
    card_title="Celebratory Lunch",
    when_label="WHEN",
    when_1="Wednesday, 30 September 2026",
    time_label="TIME",
    time_1="13.30 hrs (1:30 pm)",
    where_label="WHERE",
    where_1="New Ros Common, Kasauli",
    sub3="Your presence will make it complete",
    quote=["The bell has rung,", "but the lessons will echo on."],
    kicker6="WITH LOVE AND BLESSINGS",
    script6="Celebrate With You",
    sig="Mamta & family",
)

# ----------------------------------------------------------------- fonts
GH = "https://raw.githubusercontent.com/google/fonts/main/ofl/"
EMOJI_URLS = [
    "https://raw.githubusercontent.com/googlefonts/noto-emoji/main/fonts/NotoColorEmoji.ttf",
    "https://raw.githubusercontent.com/googlefonts/noto-emoji/main/fonts/Noto-COLRv1-emojicompat.ttf",
]
FONT_URLS = {
    "script": [GH + "greatvibes/GreatVibes-Regular.ttf"],
    "serif": [GH + "playfairdisplay/PlayfairDisplay%5Bwght%5D.ttf"],
    "body": [GH + "cormorantgaramond/CormorantGaramond%5Bwght%5D.ttf"],
    "bodyi": [GH + "cormorantgaramond/CormorantGaramond-Italic%5Bwght%5D.ttf"],
    "hindi": [GH + "notoserifdevanagari/NotoSerifDevanagari%5Bwdth%2Cwght%5D.ttf"],
}

def fetch(url, dest):
    req = urllib.request.Request(url, headers={"User-Agent": "Mozilla/5.0"})
    with urllib.request.urlopen(req, timeout=120) as r, open(dest, "wb") as fh:
        fh.write(r.read())
    return os.path.getsize(dest)

FPATH = {}
for key, urls in FONT_URLS.items():
    for i, u in enumerate(urls):
        dest = os.path.join(FDIR, "%s_%d.ttf" % (key, i))
        try:
            print("FONT OK  %-7s %8d  %s" % (key, fetch(u, dest), u.split("/")[-1]), flush=True)
            FPATH[key] = dest
            break
        except Exception as e:
            print("FONT FAIL %-7s %s" % (key, repr(e)[:90]), flush=True)

HAS_RAQM = bool(features.check("raqm"))
HAS_HINDI = HAS_RAQM and "hindi" in FPATH
print("RAQM:", HAS_RAQM, "| Devanagari usable:", HAS_HINDI, flush=True)

def _set_weight(f, weight):
    if not weight:
        return
    try:
        axes = f.get_variation_axes()
    except Exception:
        return
    vals = []
    for ax in axes:
        name = ax.get("name", "") if isinstance(ax, dict) else getattr(ax, "name", "")
        dflt = ax.get("default", 0) if isinstance(ax, dict) else getattr(ax, "default", 0)
        vals.append(weight if "eight" in str(name) else dflt)
    try:
        f.set_variation_by_axes(vals)
    except Exception as e:
        print("   weight FAIL %s" % repr(e)[:80], flush=True)

_fc = {}
def F(kind, size, weight=None):
    key = (kind, size, weight)
    if key in _fc:
        return _fc[key]
    path = FPATH.get(kind) or FPATH.get("serif") or FPATH.get("body")
    f = ImageFont.truetype(path, size)
    _set_weight(f, weight)
    _fc[key] = f
    return f

# ----------------------------------------------------------------- colour emoji
EMOJI_PATH, EMOJI_SIZE = None, 109
for i, u in enumerate(EMOJI_URLS):
    dest = os.path.join(FDIR, "emoji_%d.ttf" % i)
    try:
        fetch(u, dest)
    except Exception as e:
        print("EMOJI download failed: %s" % repr(e)[:80], flush=True)
        continue
    for size in (109, 137, 128, 96, 160, 72, 48):
        ok = False
        try:
            f = ImageFont.truetype(dest, size)
            probe = Image.new("RGBA", (size * 2, size * 2), (0, 0, 0, 0))
            ImageDraw.Draw(probe).text((size, size), "\U0001F339", font=f,
                                       embedded_color=True, anchor="mm")
            bb = probe.getbbox()
            cov = float((np.array(probe.crop(bb))[..., 3] > 30).mean()) if bb else 0.0
            if bb and cov > 0.25:
                EMOJI_PATH, EMOJI_SIZE, ok = dest, size, True
                print("EMOJI OK %s size=%d coverage=%.2f" % (u.split("/")[-1], size, cov), flush=True)
        except Exception as e:
            print("EMOJI size %d failed: %s" % (size, repr(e)[:70]), flush=True)
        if ok:
            break
    if EMOJI_PATH:
        break

def emoji_layer(chars, height, spacing=16):
    if EMOJI_PATH is None:
        return None
    try:
        f = ImageFont.truetype(EMOJI_PATH, EMOJI_SIZE)
    except Exception:
        return None
    imgs = []
    for ch in chars:
        canvas = Image.new("RGBA", (EMOJI_SIZE * 2, EMOJI_SIZE * 2), (0, 0, 0, 0))
        try:
            ImageDraw.Draw(canvas).text((EMOJI_SIZE, EMOJI_SIZE), ch, font=f,
                                        embedded_color=True, anchor="mm")
        except Exception:
            return None
        bb = canvas.getbbox()
        if not bb:
            return None
        imgs.append(canvas.crop(bb))
    out = []
    for g in imgs:
        s = height / float(g.size[1])
        out.append(g.resize((max(1, int(g.size[0] * s)), height), Image.LANCZOS))
    tw = sum(g.size[0] for g in out) + spacing * (len(out) - 1)
    lay = Image.new("RGBA", (tw, height), (0, 0, 0, 0))
    x = 0
    for g in out:
        lay.alpha_composite(g, (x, 0)); x += g.size[0] + spacing
    return lay

# ----------------------------------------------------------------- text helper
def text_layer(lines, kind, size, color, tracking=0, line_h=None, weight=None):
    f = F(kind, size, weight)
    tmp = Image.new("RGBA", (8, 8)); td = ImageDraw.Draw(tmp)
    lh = line_h or int(size * 1.32)
    widths = []
    for ln in lines:
        if tracking:
            widths.append(sum(td.textlength(c, font=f) for c in ln) + tracking * max(0, len(ln) - 1))
        else:
            widths.append(td.textlength(ln, font=f))
    pad = int(size * 0.9) + 14
    lw = int(max(widths)) + 2 * pad
    lht = int(lh * len(lines)) + 2 * pad
    lay = Image.new("RGBA", (max(8, lw), max(8, lht)), (0, 0, 0, 0))
    d = ImageDraw.Draw(lay)
    for i, ln in enumerate(lines):
        if tracking:
            x = (lw - widths[i]) / 2.0
            for ch in ln:
                d.text((x, pad + lh * i + lh * 0.80), ch, font=f, fill=color + (255,), anchor="ls")
                x += td.textlength(ch, font=f) + tracking
        else:
            d.text((lw / 2.0, pad + lh * i + lh / 2.0), ln, font=f, fill=color + (255,), anchor="mm")
    bb = lay.getbbox()
    return lay.crop(bb) if bb else lay

def fit_layer(lines, kind, size, color, max_w, tracking=0, line_h=None, weight=None):
    s, lay = size, None
    while s > 18:
        lay = text_layer(lines, kind, s, color, tracking=tracking, line_h=line_h, weight=weight)
        if lay.size[0] <= max_w:
            return lay
        s = int(s * 0.94)
    return lay

def alpha_scale(sprite, a):
    if a >= 0.999:
        return sprite
    arr = np.array(sprite, dtype=np.uint16)
    arr[..., 3] = (arr[..., 3] * a).astype(np.uint16)
    return Image.fromarray(arr.astype(np.uint8), "RGBA")

def alpha_variants(sprite, n=12):
    base = np.array(sprite, dtype=np.uint16)
    out = []
    for i in range(n):
        arr = base.copy()
        arr[..., 3] = (arr[..., 3] * (i / float(n - 1))).astype(np.uint16)
        out.append(Image.fromarray(arr.astype(np.uint8), "RGBA"))
    return out

def paste(dst, lay, cx, cy, alpha, dy=0.0):
    if lay is None or alpha <= 0.004:
        return
    im = alpha_scale(lay, alpha) if alpha < 0.999 else lay
    x = int(cx - lay.size[0] / 2.0); y = int(cy - lay.size[1] / 2.0 + dy)
    if x >= W or y >= H or x + im.size[0] <= 0 or y + im.size[1] <= 0:
        return
    dst.alpha_composite(im, (x, y))

def rule_strip(w, alpha, thickness=2):
    w = max(2, int(w))
    a = (np.sin(np.pi * np.linspace(0.0, 1.0, w)) ** 1.4 * 255 * alpha).astype(np.uint8)
    st = np.zeros((thickness, w, 4), dtype=np.uint8)
    st[..., 0], st[..., 1], st[..., 2] = GOLD[0], GOLD[1], GOLD[2]
    st[..., 3] = a
    return Image.fromarray(st, "RGBA")

# ----------------------------------------------------------------- furniture
def build_bg():
    y = np.linspace(0, 1, H)[:, None]
    bg = np.array(BG_TOP)[None, None, :] * (1 - y[..., None]) + np.array(BG_BOT)[None, None, :] * y[..., None]
    bg = np.repeat(bg, W, axis=1).astype(np.float32)
    yy, xx = np.mgrid[0:H, 0:W].astype(np.float32)
    d = np.sqrt(((xx - W * 0.5) / (W * 0.80)) ** 2 + ((yy - H * 0.40) / (H * 0.52)) ** 2)
    bg += (np.clip(1 - d, 0, 1) ** 2.3)[..., None] * np.array([118, 58, 18], dtype=np.float32)[None, None, :]
    v = np.sqrt(((xx - W * 0.5) / (W * 0.56)) ** 2 + ((yy - H * 0.5) / (H * 0.60)) ** 2)
    bg *= (1.0 - 0.34 * np.clip(v, 0, 1) ** 2.4)[..., None]
    return Image.fromarray(np.clip(bg, 0, 255).astype(np.uint8), "RGB")

def build_frame():
    S = 2
    im = Image.new("RGBA", (W * S, H * S), (0, 0, 0, 0)); d = ImageDraw.Draw(im)
    for m, col, a, wd in ((38, GOLD, 215, 2.2), (54, GOLD_L, 105, 1.0)):
        d.rectangle([m * S, m * S, (W - m) * S, (H - m) * S], outline=col + (a,), width=int(wd * S))
    for cx, cy, sx, sy in ((72, 72, 1, 1), (W - 72, 72, -1, 1), (72, H - 72, 1, -1), (W - 72, H - 72, -1, -1)):
        L = 44
        d.line([cx * S, cy * S, (cx + L * sx) * S, cy * S], fill=GOLD_L + (170,), width=int(1.5 * S))
        d.line([cx * S, cy * S, cx * S, (cy + L * sy) * S], fill=GOLD_L + (170,), width=int(1.5 * S))
        for k in (1, 2, 3):
            px, py = cx + 11 * k * sx, cy + 11 * k * sy
            d.ellipse([(px - 3) * S, (py - 3) * S, (px + 3) * S, (py + 3) * S], fill=MARIGOLD + (150,))
    return im.resize((W, H), Image.LANCZOS)

def build_toran(height=210):
    im = Image.new("RGBA", (W, height), (0, 0, 0, 0)); d = ImageDraw.Draw(im)
    d.rectangle([0, 0, W, 14], fill=(28, 5, 14, 255))
    for i in range(0, W, 22):
        d.ellipse([i + 3, 10, i + 19, 26], fill=GOLD_D + (230,))
    for k in range(4):
        x0, x1 = W * k / 4.0, W * (k + 1) / 4.0
        for i in range(48):
            t = i / 47.0
            x = x0 + (x1 - x0) * t
            yy = 52 + math.sin(math.pi * t) * 74
            r = 12.5
            d.ellipse([x - r, yy - r, x + r, yy + r], fill=(MARIGOLD if i % 2 == 0 else ORANGE) + (238,))
            d.ellipse([x - r * 0.34, yy - r * 0.55, x + r * 0.18, yy - r * 0.12], fill=(255, 236, 196, 130))
        if k < 3:
            jx = x1
            d.polygon([(jx, 108), (jx - 13, 92), (jx, 74), (jx + 13, 92)], fill=(58, 122, 74, 210))
    for x in (W * 0.25, W * 0.5, W * 0.75):
        d.line([x, 118, x, 176], fill=GOLD_L + (170,), width=2)
        d.ellipse([x - 11, 172, x + 11, 194], fill=ORANGE + (238,))
        d.ellipse([x - 4, 177, x + 2, 183], fill=(255, 236, 196, 150))
    return im

def build_mandala(size=1040):
    S = 2; s = size * S
    im = Image.new("RGBA", (s, s), (0, 0, 0, 0)); d = ImageDraw.Draw(im)
    c = s / 2.0
    for rf, wd, a in ((0.480, 2.4, 90), (0.452, 1.1, 55), (0.300, 1.1, 45), (0.196, 2.0, 70), (0.120, 1.1, 45)):
        r = s * rf / 2.0
        d.ellipse([c - r, c - r, c + r, c + r], outline=GOLD_L + (a,), width=int(wd * S))
    for i in range(24):
        ang = 360.0 * i / 24
        p = Image.new("RGBA", (int(s * 0.115), int(s * 0.038)), (0, 0, 0, 0))
        ImageDraw.Draw(p).ellipse([0, 0, p.size[0] - 1, p.size[1] - 1], outline=GOLD_L + (85,), width=int(1.5 * S))
        p = p.rotate(-ang, expand=True, resample=Image.BICUBIC)
        r = s * 0.368 / 2.0
        im.alpha_composite(p, (int(c + r * math.cos(math.radians(ang)) - p.size[0] / 2),
                               int(c + r * math.sin(math.radians(ang)) - p.size[1] / 2)))
    for i in range(48):
        ang = 360.0 * i / 48
        r = s * 0.248 / 2.0
        x, y = c + r * math.cos(math.radians(ang)), c + r * math.sin(math.radians(ang))
        d.ellipse([x - 3.2 * S, y - 3.2 * S, x + 3.2 * S, y + 3.2 * S], fill=MARIGOLD + (105,))
    return im.resize((size, size), Image.LANCZOS)

def build_diya(size=200):
    S = 2; s = size * S
    im = Image.new("RGBA", (s, s), (0, 0, 0, 0)); d = ImageDraw.Draw(im)
    d.chord([s * 0.10, s * 0.50, s * 0.90, s * 0.98], start=0, end=180, fill=GOLD_D + (255,))
    d.chord([s * 0.10, s * 0.50, s * 0.90, s * 0.98], start=0, end=180, outline=GOLD_L + (255,), width=int(3 * S))
    d.arc([s * 0.10, s * 0.50, s * 0.90, s * 0.98], start=180, end=360, fill=GOLD_L + (220,), width=int(3 * S))
    fx, fy = s * 0.5, s * 0.50
    d.polygon([(fx, fy - s * 0.30), (fx - s * 0.070, fy), (fx + s * 0.070, fy)], fill=(255, 206, 108, 255))
    d.ellipse([fx - s * 0.070, fy - s * 0.085, fx + s * 0.070, fy + s * 0.085], fill=(255, 206, 108, 255))
    d.polygon([(fx, fy - s * 0.175), (fx - s * 0.033, fy - s * 0.005), (fx + s * 0.033, fy - s * 0.005)], fill=(255, 250, 226, 255))
    return im.resize((size, size), Image.LANCZOS)

def build_glow(size=430, radius=175.0):
    yy, xx = np.mgrid[0:size, 0:size]
    c = (size - 1) / 2.0
    g = np.clip(1 - np.sqrt((xx - c) ** 2 + (yy - c) ** 2) / radius, 0, 1) ** 2.4
    arr = np.zeros((size, size, 4), dtype=np.uint8)
    arr[..., 0], arr[..., 1], arr[..., 2] = 255, 176, 70
    arr[..., 3] = (g * 195).astype(np.uint8)
    return Image.fromarray(arr, "RGBA")

def build_mote(size=26):
    yy, xx = np.mgrid[0:size, 0:size]
    c = (size - 1) / 2.0
    g = np.clip(1 - np.sqrt((xx - c) ** 2 + (yy - c) ** 2) / c, 0, 1) ** 2.0
    arr = np.zeros((size, size, 4), dtype=np.uint8)
    arr[..., 0], arr[..., 1], arr[..., 2] = 244, 214, 150
    arr[..., 3] = (g * 210).astype(np.uint8)
    return Image.fromarray(arr, "RGBA")

def build_lotus(size=124):
    im = Image.new("RGBA", (size, size), (0, 0, 0, 0))
    for i in range(6):
        p = Image.new("RGBA", (int(size * 0.86), int(size * 0.26)), (0, 0, 0, 0))
        ImageDraw.Draw(p).ellipse([0, 0, p.size[0] - 1, p.size[1] - 1], outline=GOLD_L + (215,), width=3)
        p = p.rotate(-(i * 30), expand=True, resample=Image.BICUBIC)
        im.alpha_composite(p, (size // 2 - p.size[0] // 2, size // 2 - p.size[1] // 2))
    ImageDraw.Draw(im).ellipse([size / 2 - 8, size / 2 - 8, size / 2 + 8, size / 2 + 8], fill=MARIGOLD + (235,))
    return im

def build_monogram(D=600):
    im = Image.new("RGBA", (D, D), (0, 0, 0, 0)); d = ImageDraw.Draw(im)
    c = D / 2.0
    d.ellipse([5, 5, D - 5, D - 5], outline=GOLD + (215,), width=3)
    d.ellipse([21, 21, D - 21, D - 21], outline=GOLD_L + (120,), width=2)
    d.ellipse([34, 34, D - 34, D - 34], outline=GOLD_L + (70,), width=1)
    for i in range(14):
        ang = 360.0 * i / 14
        p = Image.new("RGBA", (int(D * 0.19), int(D * 0.075)), (0, 0, 0, 0))
        ImageDraw.Draw(p).ellipse([0, 0, p.size[0] - 1, p.size[1] - 1], outline=GOLD_L + (120,), width=2)
        p = p.rotate(-ang, expand=True, resample=Image.BICUBIC)
        r = D * 0.415
        im.alpha_composite(p, (int(c + r * math.cos(math.radians(ang)) - p.size[0] / 2),
                               int(c + r * math.sin(math.radians(ang)) - p.size[1] / 2)))
    lay = text_layer([EV["name"][0].upper()], "script", int(D * 0.60), CREAM)
    im.alpha_composite(lay, (int(c - lay.size[0] / 2), int(c - lay.size[1] / 2)))
    return im

def card_base(width, height, radius=16, fill=(60, 11, 28, 215)):
    card = Image.new("RGBA", (width, height), (0, 0, 0, 0))
    S = 2
    tmp = Image.new("RGBA", (width * S, height * S), (0, 0, 0, 0))
    ImageDraw.Draw(tmp).rounded_rectangle([0, 0, width * S - 1, height * S - 1], radius=int(radius * S),
                                          fill=fill, outline=GOLD + (235,), width=int(2.2 * S))
    card.alpha_composite(tmp.resize((width, height), Image.LANCZOS), (0, 0))
    return card

def make_card(width, title, sections, title_size=66, label_size=28, value_size=48):
    Hc = 1700
    card = card_base(width, Hc)
    y = 74
    if title:
        tl = fit_layer([title], "script", title_size, GOLD, width - 110)
        card.alpha_composite(tl, (int(width / 2 - tl.size[0] / 2), int(y)))
        y += tl.size[1] + 30
        rw = int(width * 0.44)
        card.alpha_composite(rule_strip(rw, 0.9, 2), (int(width / 2 - rw / 2), int(y)))
        y += 46
    for si, sec in enumerate(sections):
        if si:
            rw = int(width * 0.34)
            card.alpha_composite(rule_strip(rw, 0.55, 1), (int(width / 2 - rw / 2), int(y)))
            y += 42
        ll = text_layer([sec["label"]], "serif", label_size, GOLD_L, tracking=12, weight=500)
        card.alpha_composite(ll, (int(width / 2 - ll.size[0] / 2), int(y)))
        y += ll.size[1] + 24
        for v in sec["values"]:
            vl = fit_layer([v], "serif", value_size, CREAM, width - 96, weight=500)
            card.alpha_composite(vl, (int(width / 2 - vl.size[0] / 2), int(y)))
            y += vl.size[1] + 12
        y += 20
    used = y + 40
    card.alpha_composite(build_lotus(64), (int(width / 2 - 32), int(used - 20)))
    return card.crop((0, 0, width, min(Hc, used + 54)))

def make_message_card(width=900, sig=None, sig_size=64):
    Hc = 1700
    card = card_base(width, Hc)
    y = 90
    paras = EV["message"]
    for pi, p in enumerate(paras):
        lay = fit_layer(p["lines"], p["kind"], p["size"], p["color"], width - 100,
                        line_h=int(p["size"] * 1.34), weight=p.get("weight"))
        card.alpha_composite(lay, (int(width / 2 - lay.size[0] / 2), int(y)))
        y += lay.size[1] + (48 if pi < len(paras) - 1 else 32)
    if sig:
        sl = fit_layer([sig], "script", sig_size, GOLD_L, width - 160)
        card.alpha_composite(sl, (int(width / 2 - sl.size[0] / 2), int(y)))
        y += sl.size[1]
    return card.crop((0, 0, width, min(Hc, y + 76)))

# ----------------------------------------------------------------- soundtrack
def ks_pluck(freq, dur, damp=0.9965, bright=0.42, seed=0):
    """Karplus-Strong plucked string (sitar/tanpura-like)."""
    rng = np.random.default_rng(seed)
    N = max(2, int(round(SR / float(freq))))
    buf = rng.uniform(-1.0, 1.0, N).astype(np.float32)
    for _ in range(2):
        buf = 0.5 * (buf + np.roll(buf, 1))
    buf /= (np.abs(buf).max() + 1e-9)
    n = int(dur * SR)
    out = np.empty(n, dtype=np.float32)
    a, b = 0.5 * (1.0 + bright), 0.5 * (1.0 - bright)
    idx = 0
    for i in range(n):
        cur = buf[idx]
        out[i] = cur
        buf[idx] = damp * (a * cur + b * buf[(idx + 1) % N])
        idx = (idx + 1) % N
    return out

def make_bell(dur, base=587.33, decay=1.9):
    t = np.arange(int(dur * SR), dtype=np.float32) / SR
    out = np.zeros_like(t)
    for mult, amp in ((1.0, 1.0), (2.0, 0.34), (2.76, 0.42), (4.07, 0.16), (5.43, 0.09)):
        out += amp * np.sin(2 * np.pi * base * mult * t) * np.exp(-t * (1.6 / decay) * (mult ** 0.4))
    return out / (np.abs(out).max() + 1e-9)

def make_pad(dur, chord=(146.83, 220.0, 293.66), amp=1.0):
    t = np.arange(int(dur * SR), dtype=np.float32) / SR
    out = np.zeros_like(t)
    for i, f in enumerate(chord):
        vib = 1.0 + 0.0016 * np.sin(2 * np.pi * (0.16 + 0.05 * i) * t)
        out += np.sin(2 * np.pi * f * vib * t) / (i + 2.0)
    swell = np.minimum(1.0, t / 4.0)
    return amp * swell * out / (np.abs(out).max() + 1e-9)

def reverb(x, seed, mix=0.34, decay=1.7, sr=SR):
    rng = np.random.default_rng(seed)
    n = int(decay * sr)
    ir = (rng.standard_normal(n) * np.exp(-np.arange(n) / (0.30 * sr))).astype(np.float32)
    ir[0] = 1.0
    ir /= np.abs(ir).sum() ** 0.5
    L = 1
    while L < len(x) + n:
        L *= 2
    y = np.fft.irfft(np.fft.rfft(x, L) * np.fft.rfft(ir, L), L)[:len(x)].astype(np.float32)
    pk = np.abs(x).max() + 1e-9
    y = y / (np.abs(y).max() + 1e-9) * pk
    return (1.0 - mix) * x + mix * y

def build_soundtrack(total):
    S = int((total + 1.2) * SR)
    bus = {k: np.zeros(S, dtype=np.float32) for k in ("drone", "mel", "bell", "pad")}

    def add(which, t0, sig, amp):
        i = int(t0 * SR)
        if i >= S:
            return
        j = min(S, i + len(sig))
        bus[which][i:j] += sig[:j - i] * amp

    SA = 146.83  # D3
    def nf(semi):
        return SA * (2.0 ** (semi / 12.0))

    # tanpura drone: Pa - sa - sa - sa cycle
    cycle = [(7, 0.90), (0, 0.85), (12, 0.72), (12, 0.66)]
    t0, k = 0.0, 0
    while t0 < total:
        semi, amp = cycle[k % len(cycle)]
        add("drone", t0, ks_pluck(nf(semi), 3.4, damp=0.9975, bright=0.30, seed=k * 7 + 1), 0.15 * amp)
        t0 += 2.15
        k += 1

    # sitar-like melody in Raag Bhoopali (Sa Re Ga Pa Dha)
    melody = [(0.80, 0, 3.0, 0.20), (2.30, 4, 2.6, 0.17), (3.70, 7, 2.8, 0.17),
              (5.30, 9, 2.6, 0.17), (6.90, 12, 3.2, 0.18),
              (9.20, 14, 3.0, 0.15), (11.20, 12, 2.8, 0.14), (13.40, 9, 3.0, 0.14),
              (15.20, 7, 3.0, 0.15),
              (17.40, 12, 2.6, 0.17), (19.00, 9, 2.6, 0.16), (20.60, 12, 2.8, 0.16),
              (22.40, 16, 3.2, 0.17), (24.40, 19, 3.2, 0.18), (26.60, 21, 3.4, 0.18),
              (28.60, 24, 3.6, 0.19), (30.80, 19, 3.6, 0.16), (32.20, 12, 4.6, 0.16)]
    for i, (t0, semi, dur, amp) in enumerate(melody):
        if t0 > total:
            continue
        add("mel", t0, ks_pluck(nf(semi), dur, damp=0.9982, bright=0.46, seed=100 + i * 13), amp)

    # temple bells on scene changes
    for i, st in enumerate([0.0, 3.95, 8.4, 16.35, 22.8, 26.75]):
        big = i in (0, 5)
        add("bell", st, make_bell(5.0, base=587.33 if big else 493.88, decay=2.2 if big else 1.7),
            0.16 if big else 0.095)

    # warm sustained pad
    add("pad", 0.4, make_pad(total + 1.0, amp=1.0), 0.085)

    # gentle lowpass to keep it soft
    kernel = np.hanning(9)
    kernel /= kernel.sum()
    def lp(x):
        return np.convolve(x, kernel, mode="same").astype(np.float32)
    for k in bus:
        bus[k] = lp(bus[k])

    L = reverb(bus["drone"] * 0.95 + bus["mel"] + bus["bell"] + bus["pad"], seed=5)
    R = reverb(bus["drone"] * 1.00 + bus["mel"] * 0.94 + bus["bell"] * 0.98 + bus["pad"], seed=9)
    st = np.stack([L, R], axis=1)

    n = st.shape[0]
    fade_in = int(1.2 * SR)
    fade_out = int(3.0 * SR)
    env = np.ones(n, dtype=np.float32)
    env[:fade_in] = np.linspace(0.0, 1.0, fade_in) ** 0.7
    env[n - fade_out:] = np.linspace(1.0, 0.0, fade_out) ** 1.1
    st *= env[:, None]

    peak = np.abs(st).max() + 1e-9
    st = np.tanh(st / peak * 1.15) * 0.72
    st = st[:int(total * SR)]
    data = np.clip(st, -1.0, 1.0)
    with wave.open(WAV, "wb") as w:
        w.setnchannels(2); w.setsampwidth(2); w.setframerate(SR)
        w.writeframes((data * 32767.0).astype("<i2").tobytes())
    print("soundtrack: %s  %.2fs  peak=%.2f" % (WAV, st.shape[0] / float(SR), np.abs(st).max()), flush=True)

# ----------------------------------------------------------------- build assets
print("building assets ...", flush=True)
BG = build_bg().convert("RGBA")
FRAME = build_frame()
TORAN = build_toran()
MANDALA = alpha_scale(build_mandala(1040), 0.19)
DIYA = build_diya(200)
LOTUS = build_lotus(120)
LOTUS_S = build_lotus(64)
GLOWS = alpha_variants(build_glow(430, 175.0), 12)
MOTE_V = alpha_variants(build_mote(26), 12)
MOTE_S = alpha_variants(build_mote(15), 12)

random.seed(11)
MOTES = [dict(x=random.uniform(70, W - 70), y=random.uniform(0, H), sp=random.uniform(58, 132),
              sw=random.uniform(0.25, 0.7), ph=random.uniform(0, 6.28), big=random.random() < 0.45)
         for _ in range(16)]

MAXW = 880
kicker1 = text_layer([EV["hindi"]], "hindi", 48, GOLD_L, weight=500) if HAS_HINDI else \
          text_layer([EV["kicker1_en"]], "serif", 34, GOLD_L, tracking=13, weight=500)
k1_extra = text_layer([EV["kicker1_en"]], "serif", 26, GOLD_L, tracking=11, weight=500) if HAS_HINDI else None

L_script1 = fit_layer([EV["script1"]], "script", 158, GOLD, MAXW)
L_sub1 = fit_layer([EV["sub1"]], "serif", 42, SOFT, MAXW, weight=500)
L_kick2 = text_layer([EV["kicker2"]], "serif", 32, GOLD_L, tracking=15, weight=500)
L_name = fit_layer([EV["name"]], "script", 250, CREAM, MAXW)
L_name_glow = alpha_scale(fit_layer([EV["name"]], "script", 250, GOLD, MAXW).filter(ImageFilter.GaussianBlur(16)), 0.55)
L_body2 = fit_layer([EV["body2"]], "serif", 44, SOFT, MAXW, weight=500)
L_small2 = text_layer([EV["small2"]], "serif", 30, GOLD_L, tracking=10, weight=500)

EMOJI_ROSE = emoji_layer(["\U0001F339"], 62)
EMOJI_ROW = emoji_layer(["\U0001F339", "\U0001F64F", "\U0001F389", "\U0001F38A"], 62)
if EMOJI_ROW is None:
    print("emoji unavailable - falling back to drawn ornaments", flush=True)
    EMOJI_ROW = build_lotus(62)

CARD_MSG = make_message_card(sig=EV["msg_sig"])
L_foot3 = text_layer([EV["msg_foot"]], "serif", 28, GOLD_L, tracking=12, weight=500)
CARD_D = make_card(848, EV["card_title"], [
    dict(label=EV["when_label"], values=[EV["when_1"]]),
    dict(label=EV["time_label"], values=[EV["time_1"]]),
    dict(label=EV["where_label"], values=[EV["where_1"]]),
])
L_sub3 = fit_layer([EV["sub3"]], "serif", 42, SOFT, MAXW, weight=500)
L_kick3 = text_layer(["THE CELEBRATION"], "serif", 32, GOLD_L, tracking=15, weight=500)
MONO = build_monogram(600)
L_quote = fit_layer(EV["quote"], "bodyi", 54, SOFT, MAXW - 60, line_h=82, weight=600)
L_kick6 = text_layer([EV["kicker6"]], "serif", 30, GOLD_L, tracking=13, weight=500)
L_script6 = fit_layer([EV["script6"]], "script", 136, GOLD, MAXW)
L_sig = fit_layer([EV["sig"]], "script", 84, CREAM, MAXW)
print("card sizes: message=%s details=%s emoji=%s" % (CARD_MSG.size, CARD_D.size, EMOJI_PATH is not None), flush=True)

# ----------------------------------------------------------------- timeline
DUR = [4.5, 5.0, 8.5, 7.0, 4.5, 5.5]
OV, HOLD, FADES = 0.55, 2.0, 0.75
start, acc = [], 0.0
for d in DUR:
    start.append(acc); acc += d - OV
LAST_END = start[-1] + DUR[-1]
TOTAL = LAST_END + HOLD
NF = int(round(TOTAL * FPS))
print("timeline start:", [round(s, 2) for s in start], "total %.2fs %d frames" % (TOTAL, NF), flush=True)

build_soundtrack(TOTAL)

def scene_alpha(i, t):
    s = start[i]
    e = TOTAL if i == len(DUR) - 1 else start[i] + DUR[i]
    if t < s or t > e:
        return 0.0
    if i + 1 < len(DUR) and t >= start[i + 1]:
        return max(0.0, 1.0 - (t - start[i + 1]) / OV)
    return 1.0

def ease(t, delay, dur=0.95):
    x = (t - delay) / dur
    if x <= 0:
        return 0.0
    if x >= 1:
        return 1.0
    return 1.0 - (1.0 - x) ** 3

ITEMS = [
    [(kicker1, 0.278, 0.10, 40, 0.9), (k1_extra, 0.325, 0.28, 34, 0.9),
     (L_script1, 0.408, 0.48, 62, 1.05), (LOTUS, 0.497, 0.88, 18, 0.8),
     (L_sub1, 0.556, 1.05, 40, 0.9)],
    [(L_kick2, 0.297, 0.10, 38, 0.9), (L_name_glow, 0.415, 0.42, 58, 1.1), (L_name, 0.415, 0.42, 58, 1.1),
     (LOTUS, 0.525, 0.88, 18, 0.8), (L_body2, 0.588, 1.00, 40, 0.9), (L_small2, 0.650, 1.20, 30, 0.9)],
    [(EMOJI_ROSE, 0.170, 0.15, 30, 0.8), (CARD_MSG, 0.455, 0.45, 54, 1.05),
     (L_foot3, 0.712, 1.10, 34, 0.9)],
    [(L_kick3, 0.246, 0.10, 38, 0.9), (CARD_D, 0.505, 0.40, 56, 1.05), (L_sub3, 0.760, 1.05, 40, 0.9)],
    [(MONO, 0.395, 0.20, 50, 1.05), (LOTUS_S, 0.545, 0.90, 18, 0.8), (L_quote, 0.645, 1.05, 44, 1.0)],
    [(L_kick6, 0.330, 0.15, 36, 0.9), (EMOJI_ROW, 0.392, 0.45, 34, 0.85),
     (L_script6, 0.468, 0.65, 58, 1.05), (LOTUS, 0.545, 0.95, 18, 0.8), (L_sig, 0.612, 1.10, 44, 0.95)],
]

def render(t):
    img = BG.copy()
    mand = MANDALA.rotate((t * 7.5) % 360.0, resample=Image.BICUBIC)
    img.alpha_composite(mand, (int(W / 2 - mand.size[0] / 2), int(H * 0.455 - mand.size[1] / 2)))
    img.alpha_composite(TORAN, (0, 0))
    img.alpha_composite(FRAME, (0, 0))
    for ph_i, cx in enumerate((148, W - 148)):
        fl = 0.68 + 0.24 * math.sin(t * 7.2 + ph_i * 1.9) + 0.10 * math.sin(t * 16.7 + ph_i * 2.4)
        g = GLOWS[int(max(0.30, min(1.0, fl)) * 11)]
        cy = H - 214
        img.alpha_composite(g, (int(cx - g.size[0] / 2), int(cy - g.size[1] / 2)))
        img.alpha_composite(DIYA, (int(cx - DIYA.size[0] / 2), int(cy - DIYA.size[1] / 2)))
    for m in MOTES:
        yy = (m["y"] - m["sp"] * t) % (H + 240) - 120
        xx = m["x"] + 26 * math.sin(t * m["sw"] + m["ph"])
        al = 0.22 + 0.62 * max(0.0, math.sin(t * 0.85 + m["ph"]))
        sp = (MOTE_V if m["big"] else MOTE_S)[max(0, min(11, int(al * 11)))]
        px, py = int(xx - sp.size[0] / 2), int(yy - sp.size[1] / 2)
        if 0 <= px < W and 0 <= py < H:
            img.alpha_composite(sp, (px, py))
    for i in range(len(DUR)):
        sa = scene_alpha(i, t)
        if sa <= 0.004:
            continue
        tl = t - start[i]
        for (lay, yf, delay, dy, dur) in ITEMS[i]:
            if lay is None:
                continue
            e = ease(tl, delay, dur)
            paste(img, lay, W / 2.0, H * yf, e * sa, dy=(1.0 - e) * dy)
    rgb = img.convert("RGB")
    k = 1.0
    if t < FADES:
        k = t / FADES
    elif t > TOTAL - FADES:
        k = max(0.0, (TOTAL - t) / FADES)
    if k < 1.0:
        return Image.fromarray((np.asarray(rgb, dtype=np.float32) * k).astype(np.uint8), "RGB")
    return rgb

# ----------------------------------------------------------------- encode (video + soundtrack)
from imageio_ffmpeg import get_ffmpeg_exe
FFMPEG = get_ffmpeg_exe()
print("ffmpeg:", FFMPEG, flush=True)
proc = subprocess.Popen([FFMPEG, "-y", "-loglevel", "error",
                         "-f", "rawvideo", "-pix_fmt", "rgb24", "-s", "%dx%d" % (W, H),
                         "-r", str(FPS), "-i", "-",
                         "-i", WAV,
                         "-map", "0:v:0", "-map", "1:a:0",
                         "-c:v", "libx264", "-preset", "slow", "-crf", "18", "-pix_fmt", "yuv420p",
                         "-c:a", "aac", "-b:a", "192k", "-ar", str(SR),
                         "-shortest", "-movflags", "+faststart", OUT], stdin=subprocess.PIPE)

poster_t = start[1] + 2.6
for n in range(NF):
    t = n / float(FPS)
    fr = render(t)
    if abs(t - poster_t) < 0.5 / FPS:
        fr.save(POSTER, quality=92)
    proc.stdin.write(np.asarray(fr, dtype=np.uint8).tobytes())
    if n % 100 == 0:
        print("frame %4d / %d  (t=%.1fs)" % (n, NF, t), flush=True)
proc.stdin.close()
proc.wait()
print("encoded:", OUT, os.path.getsize(OUT), "bytes", flush=True)

PREVIEW_DIR = "/tmp/previews"
os.makedirs(PREVIEW_DIR, exist_ok=True)
checks = [("s1", start[0] + 3.4), ("s2", start[1] + 3.2), ("s3", start[2] + 5.8),
          ("s4", start[3] + 5.2), ("s5", start[4] + 3.0), ("s6", start[5] + 3.9)]
previews = []
for name, tt in checks:
    fp = os.path.join(PREVIEW_DIR, "preview_%s.jpg" % name)
    render(tt).save(fp, quality=92)
    previews.append(fp)
    print("preview", name, "t=%.2f" % tt, flush=True)

# ----------------------------------------------------------------- upload
from huggingface_hub import HfApi
REPO = os.environ.get("REPO_ID", "coderdecoder01/retirement-invitation-mamta")
api = HfApi(token=os.environ["HF_TOKEN"])
api.create_repo(repo_id=REPO, repo_type="dataset", private=False, exist_ok=True)
try:
    api.update_repo_settings(repo_id=REPO, repo_type="dataset", private=False)
except Exception as e:
    print("visibility:", repr(e)[:120], flush=True)
api.upload_file(path_or_fileobj=OUT, path_in_repo="mamta-retirement-invitation.mp4", repo_id=REPO, repo_type="dataset")
api.upload_file(path_or_fileobj=WAV, path_in_repo="soundtrack.wav", repo_id=REPO, repo_type="dataset")
api.upload_file(path_or_fileobj=POSTER, path_in_repo="poster.jpg", repo_id=REPO, repo_type="dataset")
for fp in previews:
    api.upload_file(path_or_fileobj=fp, path_in_repo="previews/" + os.path.basename(fp), repo_id=REPO, repo_type="dataset")
print("VIDEO  https://huggingface.co/datasets/%s/resolve/main/mamta-retirement-invitation.mp4" % REPO)
print("POSTER https://huggingface.co/datasets/%s/resolve/main/poster.jpg" % REPO)