import os
import requests

# Set your Groq API Key
GROQ_API_KEY = "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"

def summarize_match(job_description, cv_names, cv_snippets):
    if not GROQ_API_KEY:
        return "❌ GROQ_API_KEY not set."

    try:
        # Truncate job description
        job_description = job_description.strip()[:800] or "[No description provided]"

        # Truncate each CV snippet
        cv_snippets = [(text.strip()[:700] or "[No content]") for text in cv_snippets]
        cv_names = [name[:60] for name in cv_names]

        # Build dynamic CV section
        cv_section = ""
        for i, (name, snippet) in enumerate(zip(cv_names, cv_snippets), start=1):
            cv_section += f"\n{i}. {name}:\n{snippet}\n"

        # Build prompt
        prompt = f"""
You are an AI recruitment assistant helping to evaluate candidate CVs for a job opening.

Below is the job description, followed by {len(cv_names)} candidate CV summaries.

Your job is to:
- Analyze each candidate's relevance based on their technical skills, tools, and experience
- Be honest: clearly state if a candidate is a good fit or not
- Avoid generic praise unless it's supported by actual content
{"- Rank the candidates based on fit if more than one is provided." if len(cv_names) > 1 else ""}

### Job Description:
{job_description}

### Candidate CVs:{cv_section}
""".strip()

        # Enforce character limit (approx 8000 tokens max for llama3-8b-8192)
        if len(prompt) > 8000:
            prompt = prompt[:8000]

        # Call Groq API
        response = requests.post(
            url="https://api.groq.com/openai/v1/chat/completions",
            headers={
                "Authorization": f"Bearer {GROQ_API_KEY}",
                "Content-Type": "application/json"
            },
            json={
                "model": "llama3-8b-8192",
                "messages": [
                    {"role": "system", "content": "You are a helpful recruitment assistant."},
                    {"role": "user", "content": prompt}
                ],
                "temperature": 0.4
            },
            timeout=30
        )

        response.raise_for_status()
        return response.json()["choices"][0]["message"]["content"]

    except requests.exceptions.RequestException as e:
        return f"❌ Groq API error: {e}"
    except Exception as e:
        return f"❌ Unexpected error: {e}"