# utils.py
import os
import uuid
import json
import shutil

def save_uploaded_audio(uploaded_file, filename):
    output_path = os.path.join("uploads", filename)
    os.makedirs("uploads", exist_ok=True)
    with open(output_path, "wb") as f:
        f.write(uploaded_file.read())
    return output_path

def get_voice_preset(gender, emotion):
    presets = {
        ("Male", "Happy"): "male-happy-preset",
        ("Male", "Sad"): "male-sad-preset",
        ("Female", "Happy"): "female-happy-preset",
        ("Female", "Sad"): "female-sad-preset",
    }
    return presets.get((gender, emotion), "male-happy-preset")


def save_chat_history(chat_data, filename=None):
    os.makedirs("history", exist_ok=True)
    if not filename:
        filename = f"chat_{uuid.uuid4().hex}.json"
    filepath = os.path.join("history", filename)
    with open(filepath, "w") as f:
        json.dump(chat_data, f, indent=2)
    return filename

def load_chat_history(filename):
    if not filename:
        return []
    try:
        with open(os.path.join("history", filename), "r") as f:
            return json.load(f)
    except Exception:
        return []

def list_chat_histories():
    os.makedirs("history", exist_ok=True)
    return [f for f in os.listdir("history") if f.endswith(".json")]

def clear_all_histories():
    if os.path.exists("history"):
        shutil.rmtree("history")
        os.makedirs("history")