import gradio as gr
import torch
import torchaudio
import re
import os
from transformers import SpeechT5Processor, SpeechT5ForTextToSpeech, SpeechT5HifiGan
from speechbrain.pretrained import EncoderClassifier

device = "cuda" if torch.cuda.is_available() else "cpu"

# Load processor & vocoder
processor = SpeechT5Processor.from_pretrained("microsoft/speecht5_tts")
vocoder = SpeechT5HifiGan.from_pretrained("microsoft/speecht5_hifigan").to(device)

# Load both TTS models
model_male = SpeechT5ForTextToSpeech.from_pretrained("HusseinBashir/xus23").to(device)
model_female = SpeechT5ForTextToSpeech.from_pretrained("Somalitts/8aad").to(device)

# Load speaker encoder model
speaker_model = EncoderClassifier.from_hparams(
    source="speechbrain/spkrec-xvect-voxceleb",
    run_opts={"device": device},
    savedir="./spk_model"
)

# Auto-generate embedding
def get_embedding(wav_path, pt_path):
    if os.path.exists(pt_path):
        return torch.load(pt_path).to(device)
    else:
        audio, sr = torchaudio.load(wav_path)
        audio = torchaudio.functional.resample(audio, sr, 16000).mean(dim=0).unsqueeze(0).to(device)
        with torch.no_grad():
            emb = speaker_model.encode_batch(audio)
            emb = torch.nn.functional.normalize(emb, dim=2).squeeze()
        torch.save(emb.cpu(), pt_path)
        return emb

# Ensure embeddings are created or loaded
embedding_male = get_embedding("498-enhanced-v2.wav", "male_embedding.pt")
embedding_female = get_embedding("caasho.wav", "female_embedding.pt")

# Somali numbers to words
number_words = {
    0: "eber", 1: "koow", 2: "labo", 3: "seddex", 4: "afar", 5: "shan",
    6: "lix", 7: "todobo", 8: "sideed", 9: "sagaal", 10: "toban",
    11: "toban iyo koow", 12: "toban iyo labo", 13: "toban iyo seddex",
    14: "toban iyo afar", 15: "toban iyo shan", 16: "toban iyo lix",
    17: "toban iyo todobo", 18: "toban iyo sideed", 19: "toban iyo sagaal",
    20: "labaatan", 30: "sodon", 40: "afartan", 50: "konton",
    60: "lixdan", 70: "todobaatan", 80: "sideetan", 90: "sagaashan",
    100: "boqol", 1000: "kun",
}

def number_to_words(number):
    if number < 20:
        return number_words[number]
    elif number < 100:
        tens, unit = divmod(number, 10)
        return number_words[tens * 10] + (" " + number_words[unit] if unit else "")
    elif number < 1000:
        hundreds, remainder = divmod(number, 100)
        return (number_words[hundreds] + " boqol" if hundreds > 1 else "BOQOL") + (" " + number_to_words(remainder) if remainder else "")
    elif number < 1000000:
        thousands, remainder = divmod(number, 1000)
        return (number_to_words(thousands) + " kun" if thousands > 1 else "KUN") + (" " + number_to_words(remainder) if remainder else "")
    elif number < 1000000000:
        millions, remainder = divmod(number, 1000000)
        return number_to_words(millions) + " malyan" + (" " + number_to_words(remainder) if remainder else "")
    elif number < 1000000000000:
        billions, remainder = divmod(number, 1000000000)
        return number_to_words(billions) + " milyaar" + (" " + number_to_words(remainder) if remainder else "")
    else:
        return str(number)

def replace_numbers_with_words(text):
    return re.sub(r'\b\d+\b', lambda match: number_to_words(int(match.group())), text)

def normalize_text(text):
    text = text.lower()
    text = replace_numbers_with_words(text)
    text = re.sub(r'[^\w\s]', '', text)
    return text

# Main TTS function
def text_to_speech(text, voice):
    text = normalize_text(text)
    inputs = processor(text=text, return_tensors="pt").to(device)

    if voice == "Male":
        model = model_male
        embedding = embedding_male
    else:
        model = model_female
        embedding = embedding_female

    with torch.no_grad():
        speech = model.generate_speech(inputs["input_ids"], embedding.unsqueeze(0), vocoder=vocoder)
    return (16000, speech.cpu().numpy())

# Gradio Interface
iface = gr.Interface(
    fn=text_to_speech,
    inputs=[
        gr.Textbox(label="Geli qoraalka Af-Soomaaliga", placeholder="Tusaale: Baro aqoonta casriga ah..."),
        gr.Radio(["Male", "Female"], label="Dooro Codka", value="Female")
    ],
    outputs=gr.Audio(label="Codka la abuuray", type="numpy"),
    title="Somali TTS (Lab & Dhedig)",
    description="Dooro codka aad rabto, geli qoraal af-soomaali ah, codka ayaa la abuuri doonaa adigoo isticmaalaya Somali TTS (SpeechT5)."
)

iface.launch()