import streamlit as st
from langchain_google_genai import GoogleGenerativeAI
import langchain
import time
import subprocess as s
import sys
from langchain_core.prompts import PromptTemplate

st.title("resume creator by ahmed")
api="AIzaSyB3VJeF1jN9CiKWE01koqR1SRE6k-3aIr0"
time.sleep(5)
llm=GoogleGenerativeAI(model="gemini-1.5-flash",google_api_key=api,temperature=0.3)
choice=st.text_input("for which proffession you are creating resume")
Name=st.text_input("enter name")
Email=st.text_input("enter email")
Phone=st.text_input("enter phone")
Location=st.text_input("enter location")
LinkedIn=st.text_input("enter linkedin if applicable")
GitHub=st.text_input("enter github if applicable")
Education=st.text_input("enter education")
Skills=st.text_input("enter skills")
Projects=st.text_input("enter projects")
Experience=st.text_input("enter experience if applicable")
Internship=st.text_input("enter internships if applicable")
b=st.button("submit information")
if b:
    if not skills:
        skills=f"Use skills relevant to the interest {choice}"
    if not LinkedIn:
        LinkedIn="not provided"
    if not GitHub:
        GitHub="not provided"
    if not Experience:
        Experience="not provided"
    if not Internship:
        Internship="not provided"
    if Name and Email and choice and Phone and Location and Education and Skills and Projects:
        template = '''Create a professional, ATS-friendly resume for a candidate with the following interests and background:

                        User Interest:
                        {choice}
                        
                        Candidate Details:
                        - Name: {Name}
                        - Email: {Email}
                        - Phone: {Phone}
                        - Location: {Location}
                        - LinkedIn: {Linkedin}
                        - GitHub: {GitHub}
                        
                        Instructions:
                        - Use clear section headings
                        - Keep the resume concise and professional
                        - Include only sections for which information is provided
                        - Do NOT mention missing or empty fields
                        - Do NOT write phrases like "Not provided"
                        - Do NOT add fake experience
                        - Use bullet points where appropriate
                        
                        Content:
                        - Education: {Education}
                        - Skills: {Skills}
                        - Projects: {Projects}
                        - Experience: {Experience}
                        - Internship: {Internship}
                        Generate the resume now.
                        '''
        p=langchain_core.prompts.PromptTemplate(template=template)
        prompt=p.format(Name=Name,Education=Education,Email=Email,Experience=Experience,
                         GitHub=GitHub,
                         Internship=Internship,
                         Linkedin=Linkedin,
                         Location=Location,
                         Phone=Phone,
                         Projects=Projects,
                         Skills=Skills,
                         choice=choice)
        var='''You are a senior-level Python engineer with over 20 years of professional experience and a resume expert with over 20 years of experience creating industry-standard, ATS-friendly resumes.

                Your task is to generate a complete, executable Python program that creates a professional resume as a PDF file.
                
                Libraries and environment rules:
                - Use Python 3.9+ syntax
                - Use ReportLab (reportlab.platypus) for PDF generation
                - Do NOT use pdfplumber, PyPDF2, or any read-only PDF libraries
                - Use only standard Python libraries in addition to ReportLab
                - The code must be runnable in a local environment after installing dependencies via pip
                
                Strict requirements:
                - Automatically handle layout, spacing, and page breaks (no manual x/y positioning)
                - Accept resume details as input variables (name, email, phone, location, education, skills, projects, experience, internship, links)
                - Include only sections for which data is provided
                - Never write placeholders such as "Not provided"
                - Never invent or add fake experience, skills, or projects
                - Follow best practices for professional, ATS-friendly resume formatting
                
                Output rules:
                - Output ONLY executable Python code
                - Do NOT include explanations, comments, or markdown
                - The program must generate a resume.pdf  file when run
                
                Assume the user will install dependencies using:
                pip install reportlab'''

        message=[['system message',var],['user message',prompt]]
        te = llm.invoke(message)
        cd=te.strip("```python")
        with open("app.py","w") as f:
            f.write(cd)
        result= s.run(
                [sys.executable, "app.py"],   # use current Python env
                capture_output=True,
                text=True
            )
        if result.returncode == 0:
            st.success("Resume PDF generated successfully!")
            with open("resume.pdf","rb") as f:
                st.download_button(label="download the resume in pdf format",data=f,file_name="resume.pdf")
        else:
            with open("app.py","r") as d:
                d.seek(0)
                st.write(d.read())
    else:
        st.markdown("please write the above required feilds")