import os
import tempfile
import zipfile
import google.generativeai as genai
from dotenv import load_dotenv
load_dotenv()

API_KEY = os.getenv("GOOGLE_API_KEY")
genai.configure(api_key=API_KEY)
model = genai.GenerativeModel("models/gemini-2.0-flash")
chat_session = model.start_chat(history=[])

def ask_agent(history, message, last_processed_repo_path):

    if not last_processed_repo_path or not os.path.exists(last_processed_repo_path):
        return history, "📂 No repository has been processed yet. Please generate documentation first."

    with tempfile.TemporaryDirectory() as tmpdir:
        with zipfile.ZipFile(last_processed_repo_path, 'r') as zip_ref:
            zip_ref.extractall(tmpdir)

        # Extensions for docs and code to consider
        extensions_docs = [".md", ".txt"]
        extensions_code = [".py", ".js", ".java", ".ts", ".cpp", ".c", ".cs", ".go", ".rb", ".swift", ".php"]

        all_files = []
        for root, _, files in os.walk(tmpdir):
            for file in files:
                ext = os.path.splitext(file)[1].lower()
                if ext in extensions_docs or ext in extensions_code:
                    all_files.append(os.path.join(root, file))

        if not all_files:
            return history, "📄 No documentation or code files found in the generated zip."

        # Read and concatenate content
        docs_and_code_content = ""
        for file_path in all_files:
            try:
                with open(file_path, "r", encoding="utf-8") as f:
                    file_content = f.read()
                rel_path = os.path.relpath(file_path, tmpdir)
                docs_and_code_content += f"\n\n===== File: {rel_path} =====\n\n"
                docs_and_code_content += file_content
            except Exception as e:
                docs_and_code_content += f"\n\n===== Error reading file {file_path}: {str(e)} =====\n\n"

    prompt = (
        f"Here is the content of the project (documentation and code):\n\n{docs_and_code_content}\n\n"
        f"Question: {message}\n\nPlease respond clearly and precisely."
    )

    try:
        response = chat_session.send_message(prompt)
        answer = response.text
    except Exception as e:
        answer = f"❌ Error when calling Gemini: {str(e)}"

    history = history or []
    history.append((message, answer))

    return history, ""