app.py

from dotenv import load_dotenv
import streamlit as st
import os
import google.generativeai as genai
import random  # Nueva importación para la selección aleatoria de mención

load_dotenv()

genai.configure(api_key=os.getenv("GOOGLE_API_KEY"))

# Función para obtener una mención del producto de manera probabilística
def get_random_product_mention():
    mentions = ["Directa", "Indirecta", "Metafórica"]
    probabilities = [0.34, 0.33, 0.33]  # Probabilidades de cada mención
    return random.choices(mentions, probabilities)[0]

# Función para obtener una técnica de copywriting de manera aleatoria
def get_random_copywriting_technique():
    techniques = [
        "1. If/Then: This is one of the most commonly used opening paragraphs. Gary Halbert, one of the most important copywriters of the 20th century, used them in almost every one of his sales letters. It’s very simple, clear, and powerful. It lets people know what to expect. There’s also a very interesting belief structure that is built with this combo. If this, then that. It’s as if they need to meet some kind of prerequisite to get the benefit. An example of this would be: 'If you want to make more than $100,000 a year working just 4 hours a day, then this letter will show you how.' Very simple. If you want that, then here’s how you do it.",
        "2. If / Then + Authority: Even more powerful than the 'If / Then' key is the same concept but adding a figure of authority or credibility. For example: 'If you want to know a secret way to become almost invincible in a fight... then here I’ll show you what the gladiators and samurais used to do. And why you can do it too starting today.' One way to notice the power of these opening paragraphs is by removing the authority figure. In this case: the gladiators and samurais. That would change the paragraph to: 'If you want to know a secret way to become almost invincible in a fight... then here I’ll show you why you can do it too starting today.' As you can see, it doesn’t have as much impact as the version with the gladiators and samurais.",
        "3. Honesty: Being transparent is one of the best ways to get more customers. It also works with opening paragraphs. For example, one of Gary Halbert’s ads started like this: 'My name is Betty Adams, and the first thing you should know about me is... I’m not a doctor. I’m also not a nutrition expert. I didn’t go to college and I don’t even have a degree. In fact, the only thing I consider myself an expert in is...' And then it went to a subheading where she mentioned how she could help you lose 10 kilos in a very simple way. In this case, you can notice all the negatives she uses: 'I’m not a doctor,' 'I’m not a nutrition expert,' 'I didn’t go to school,' 'I don’t have a degree.' These four negative statements strengthen her claim about what she is. Now, this won’t always work for every sales letter. It will depend on your market and ideal customer. If your market isn’t skeptical, you don’t need to use this kind of paragraph.",
        "4. Sensationalist: This one is related to the sensational headline. Here’s where you’d say something like: 'Let me tell you this strange story about a man who was arrested because he had herpes.' It’s sensationalist. And sensationalism sells. It always has and always will. Without a doubt, the paragraph is strange and makes your reader think: 'How was someone arrested for having herpes? What did he do? What happened?' It keeps them hooked, addicted to finding out more. They need to know.",
        "5. Ask a Question: It makes people stop if they’re interested. One of the best opening paragraphs is this: 'Did you know that the long-term value of baseball cards is much higher than that of stocks and rare coins?' So when you talk to someone in the finance, investor, or related niches about this topic, they will be interested because it’s different and gets them ready to start the journey.",
        "6. Micro Openings: This paragraph should be short. Just a few words... so they’ll read the next one. This is because being brief makes it easy to read. And if you say something that puts your reader in the right mindset, this can be quite powerful. For example, if your product is targeted to a skeptical market, you can use a paragraph like the following: 'I was a total skeptic.' With this, you’re going straight to their mind, to their doubts. One that you can use effectively is: 'Imagine the following:'"
    ]
    return random.sample(techniques, k=random.randint(1, 3))  # Escoge entre 1 y 3 técnicas al azar

# Al crear el prompt completo, incluye el tamaño y las técnicas seleccionadas
def get_gemini_response(target_audience, product, text_type, length, mood, emotionality):
    product_mention = get_random_product_mention()
    model_choice = "gemini-1.5-flash"  # Modelo predeterminado

    model = genai.GenerativeModel(model_choice)

    # Obtener técnicas aleatorias
    copywriting_techniques = get_random_copywriting_technique()
    techniques_text = " ".join(copywriting_techniques)

    # Instrucción específica para el tipo de texto
    format_instruction = ""
    if text_type == "Historia":
        format_instruction = f"""
        Write an engaging opening paragraph that introduces a relatable problem your audience is facing. Stir emotions by highlighting the impact of the problem on their life, and create curiosity with hints of a potential solution without revealing everything. The paragraph should be approximately {length} words long to maintain engagement and avoid losing the reader's attention.
        """
    elif text_type == "Carta de venta":
        format_instruction = f"""
        Craft a persuasive lead paragraph for a sales letter that quickly identifies a common pain point your reader is experiencing. The paragraph should be around {length} words long and agitate the problem by emphasizing the negative consequences of not addressing it, and tease the possibility of a solution to spark curiosity.
        """
    elif text_type == "Correo":
        format_instruction = f"""
        Write a concise but impactful opening paragraph for an email that captures the reader’s attention. The text should be approximately {length} words, addressing a challenge they are likely facing, and leave them intrigued by hinting at a valuable solution that will be revealed if they continue reading.
        """
    elif text_type == "Landing page":
        format_instruction = f"""
        Design a compelling first paragraph for a landing page that immediately draws attention to a significant problem your target audience is encountering. The paragraph should be about {length} words long, stirring emotions and enticing them to keep scrolling by subtly suggesting a solution.
        """

    # Crear el prompt completo basado en los campos del frontend
    full_prompt = f"""
    You are a creative writer skilled in the art of persuasion. The tone of the {text_type} should be {mood} and {emotionality} emotionally resonate with a {target_audience}. Evoke feelings of {target_audience} through relatable, real-life situations that reflect their experiences. {product_mention} {format_instruction} 
Use the following copywriting techniques to write this opening paragraph: {techniques_text}.
Use persuasive techniques to guide the reader towards an intuitive understanding of the product's benefits, focusing on creating a strong emotional connection with the audience.
Create an opening paragraph for a {text_type} of {length} words in Spanish that makes {target_audience} aware they have a problem. Highlight this problem by explaining it with relatable situations tailored to their context, using a natural or conversational tone. The goal of this paragraph is to entice them to keep reading and discover what {product} is about. Use persuasion effectively in every word, mastering advanced techniques.
    """

    response = model.generate_content([full_prompt])

    # Comprobar si la respuesta es válida y devolver el texto
    if response and response.parts:
        return response.parts[0].text
    else:
        raise ValueError("Lo sentimos, intenta con una combinación diferente de entradas.")

# Inicializar la aplicación Streamlit
st.set_page_config(page_title="First Line Alchemy", layout="wide")

# Centrar el título y el subtítulo
st.markdown("<h1 style='text-align: center;'>First Line Alchemy</h1>", unsafe_allow_html=True)
st.markdown("<p style='text-align: center;'>Experimenta la magia de transformar conceptos ordinarios en líneas de apertura extraordinarias que cautivan la imaginación e inspiran acción.</p>", unsafe_allow_html=True)

# Añadir CSS personalizado para el botón
st.markdown("""
    <style>
    div.stButton > button {
        background-color: #FFCC00; /* Color llamativo */
        color: black;  /* Texto en negro */
        width: 90%;
        height: 60px;
        font-weight: bold;
        font-size: 22px; /* Tamaño más grande */
        text-transform: uppercase; /* Texto en mayúsculas */
        border: 1px solid #000000; /* Borde negro de 1px */
        border-radius: 8px;
        display: block;
        margin: 0 auto;  /* Centramos el botón */
    }
    div.stButton > button:hover {
        background-color: #FFD700; /* Color al pasar el mouse */
        color: black;  /* Texto sigue en negro */
    }
    </style>
    """, unsafe_allow_html=True)

# Crear dos columnas para el diseño (40% y 60%)
col1, col2 = st.columns([2, 3])  # 2 + 3 = 5 partes en total

with col1:
    # Crear campos de entrada
    target_audience = st.text_input("¿Quién es tu público objetivo?")
    product = st.text_input("¿Qué producto tienes en mente?")
    
    # Acordeón para personalizar el párrafo de apertura
    with st.expander("Personaliza tu párrafo de apertura"):
        text_type = st.selectbox("Tipo de texto", ["Historia", "Carta de venta", "Correo", "Landing page"])
        length = st.slider("Número de palabras", min_value=50, max_value=200, value=100)
        mood = st.selectbox("Tono de voz", ["Conversacional", "Formal", "Persuasivo"])
        emotionality = st.selectbox("Emocionalidad del texto", ["Triste", "Feliz", "Horroroso", "Chistoso", "Amoroso", "Sorpresivo", "Desesperante", "Esperanzador", "Iracundo", "De confianza"])
    
    # Botón para generar y enviar el contenido
    submit = st.button("Escribir mi Texto")

if submit:  # Verifica si se hizo clic en el botón de envío
    if target_audience and product:  # Verificar que se haya proporcionado el público objetivo y el producto
        try:
            # Obtener la respuesta del modelo
            generated_text = get_gemini_response(target_audience, product, text_type, length, mood, emotionality)
            col2.subheader("Contenido generado:")
            col2.write(generated_text)  # Resultado del texto generado
        except ValueError as e:
            col2.error(f"Error: {str(e)}")
    else:
        col2.error("Por favor, proporciona el público objetivo y el producto.")