# File: prompts.py

DOCUMENT_OUTLINE_PROMPT_SYSTEM = """You are a document generator. Provide the outline of the document requested in <prompt></prompt> in JSON format.
Include sections and subsections if required. Use the "Content" field to provide a specific prompt or instruction for generating content for that particular section or subsection.
make sure the Sections follow a logical flow and each prompt's content does not overlap with other sections.
OUTPUT IN FOLLOWING JSON FORMAT enclosed in <output> tags
<output>
{
    "Document": {
      "Title": "Document Title",
      "Author": "Author Name",
      "Date": "YYYY-MM-DD",
      "Version": "1.0",

      "Sections": [
        {
          "SectionNumber": "1",
          "Title": "Section Title",
          "Content": "Specific prompt or instruction for generating content for this section",
          "Subsections": [
            {
              "SectionNumber": "1.1",
              "Title": "Subsection Title",
              "Content": "Specific prompt or instruction for generating content for this subsection"
            }
          ]
        }
      ]
    }
  }
</output>"""

DOCUMENT_OUTLINE_PROMPT_USER = """<prompt>{query}</prompt>"""

DOCUMENT_SECTION_PROMPT_SYSTEM = """You are a document generator, You need to output only the content requested in the section in the prompt.
FORMAT YOUR OUTPUT AS MARKDOWN ENCLOSED IN <response></response> tags
<overall_objective>{overall_objective}</overall_objective>
<document_layout>{document_layout}</document_layout>"""

DOCUMENT_SECTION_PROMPT_USER = """<prompt>Output the content for the section "{section_or_subsection_title}" formatted as markdown. Follow this instruction: {content_instruction}</prompt>"""

##########################################

DOCUMENT_TEMPLATE_OUTLINE_PROMPT_SYSTEM = """You are a document template generator. Provide the outline of the document requested in <prompt></prompt> in JSON format.
Include sections and subsections if required. Use the "Content" field to provide a specific prompt or instruction for generating template with placeholder text /example content for that particular section or subsection. Specify in each prompt to output as a template and use placeholder text/ tables as necessory.
make sure the Sections follow a logical flow and each prompt's content does not overlap with other sections.
OUTPUT IN FOLLOWING JSON FORMAT enclosed in <output> tags
<output>
{
    "Document": {
      "Title": "Document Title",
      "Author": "Author Name",
      "Date": "YYYY-MM-DD",
      "Version": "1.0",

      "Sections": [
        {
          "SectionNumber": "1",
          "Title": "Section Title",
          "Content": "Specific prompt or instruction for generating template for this section",
          "Subsections": [
            {
              "SectionNumber": "1.1",
              "Title": "Subsection Title",
              "Content": "Specific prompt or instruction for generating template for this subsection"
            }
          ]
        }
      ]
    }
  }
</output>"""

DOCUMENT_TEMPLATE_PROMPT_USER = """<prompt>{query}</prompt>"""

DOCUMENT_TEMPLATE_SECTION_PROMPT_SYSTEM = """You are a document template generator,You need to output only the content requested in the section in the prompt, Use placeholder text/examples/tables wherever required.
FORMAT YOUR OUTPUT AS A TEMPLATE ENCLOSED IN <response></response> tags
<overall_objective>{overall_objective}</overall_objective>
<document_layout>{document_layout}</document_layout>"""

DOCUMENT_TEMPLATE_SECTION_PROMPT_USER = """<prompt>Output the content for the section "{section_or_subsection_title}" formatted as markdown. Follow this instruction: {content_instruction}</prompt>"""



# File: app.py
import os
import json
import re
import asyncio
import time
from typing import List, Dict, Optional, Any, Callable
from openai import OpenAI
import logging
import functools
from fastapi import APIRouter, HTTPException, Request
from fastapi.responses import StreamingResponse
from pydantic import BaseModel
from fastapi_cache.decorator import cache
import psycopg2
from datetime import datetime


logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)

def log_execution(func: Callable) -> Callable:
    @functools.wraps(func)
    def wrapper(*args: Any, **kwargs: Any) -> Any:
        logger.info(f"Executing {func.__name__}")
        try:
            result = func(*args, **kwargs)
            logger.info(f"{func.__name__} completed successfully")
            return result
        except Exception as e:
            logger.error(f"Error in {func.__name__}: {e}")
            raise
    return wrapper

class DatabaseManager:
    """Manages database operations."""

    def __init__(self):
        self.db_params = {
            "dbname": "postgres",
            "user": os.environ['SUPABASE_USER'],
            "password": os.environ['SUPABASE_PASSWORD'],
            "host": "aws-0-us-west-1.pooler.supabase.com",
            "port": "5432"
        }

    @log_execution
    def update_database(self, user_id: str, user_query: str, response: str) -> None:
        with psycopg2.connect(**self.db_params) as conn:
            with conn.cursor() as cur:
                insert_query = """
                INSERT INTO ai_document_generator (user_id, user_query, response)
                VALUES (%s, %s, %s);
                """
                cur.execute(insert_query, (user_id, user_query, response))

class AIClient:
    def __init__(self):
        self.client = OpenAI(
            base_url="https://openrouter.ai/api/v1",
            api_key="sk-or-v1-"+os.environ['OPENROUTER_API_KEY']
        )
    
    @log_execution
    def generate_response(
        self,
        messages: List[Dict[str, str]],
        model: str = "openai/gpt-4o-mini",
        max_tokens: int = 32000
    ) -> Optional[str]:
        if not messages:
            return None
        response = self.client.chat.completions.create(
            model=model,
            messages=messages,
            max_tokens=max_tokens,
            stream=False
        )
        return response.choices[0].message.content

class DocumentGenerator:
    def __init__(self, ai_client: AIClient):
        self.ai_client = ai_client
        self.document_outline = None
        self.content_messages = []

    @staticmethod
    def extract_between_tags(text: str, tag: str) -> str:
        pattern = f"<{tag}>(.*?)</{tag}>"
        match = re.search(pattern, text, re.DOTALL)
        return match.group(1).strip() if match else ""

    @staticmethod
    def remove_duplicate_title(content: str, title: str, section_number: str) -> str:
        patterns = [
            rf"^#+\s*{re.escape(section_number)}(?:\s+|\s*:\s*|\.\s*){re.escape(title)}",
            rf"^#+\s*{re.escape(title)}",
            rf"^{re.escape(section_number)}(?:\s+|\s*:\s*|\.\s*){re.escape(title)}",
            rf"^{re.escape(title)}",
        ]
        
        for pattern in patterns:
            content = re.sub(pattern, "", content, flags=re.MULTILINE | re.IGNORECASE)
        
        return content.lstrip()

    @log_execution
    def generate_document_outline(self, query: str, template: bool = False, max_retries: int = 3) -> Optional[Dict]:
        messages = [
            {"role": "system", "content": DOCUMENT_OUTLINE_PROMPT_SYSTEM if not template else DOCUMENT_TEMPLATE_OUTLINE_PROMPT_SYSTEM},
            {"role": "user", "content": DOCUMENT_OUTLINE_PROMPT_USER.format(query=query) if not template else DOCUMENT_TEMPLATE_PROMPT_USER.format(query=query)}
        ]
        
        for attempt in range(max_retries):
            outline_response = self.ai_client.generate_response(messages, model="openai/gpt-4o")
            outline_json_text = self.extract_between_tags(outline_response, "output")
            
            try:
                self.document_outline = json.loads(outline_json_text)
                return self.document_outline
            except json.JSONDecodeError as e:
                if attempt < max_retries - 1:
                    logger.warning(f"Failed to parse JSON (attempt {attempt + 1}): {e}")
                    logger.info("Retrying...")
                else:
                    logger.error(f"Failed to parse JSON after {max_retries} attempts: {e}")
                    return None

    @log_execution
    def generate_content(self, title: str, content_instruction: str, section_number: str, template: bool = False) -> str:
        SECTION_PROMPT_USER = DOCUMENT_SECTION_PROMPT_USER if not template else DOCUMENT_TEMPLATE_SECTION_PROMPT_USER
        self.content_messages.append({
            "role": "user",
            "content": SECTION_PROMPT_USER.format(
                section_or_subsection_title=title,
                content_instruction=content_instruction
            )
        })
        section_response = self.ai_client.generate_response(self.content_messages)
        content = self.extract_between_tags(section_response, "response")
        content = self.remove_duplicate_title(content, title, section_number)
        self.content_messages.append({
            "role": "assistant",
            "content": section_response
        })
        return content

class MarkdownConverter:
    @staticmethod
    def slugify(text: str) -> str:
        return re.sub(r'\W+', '-', text.lower())

    @classmethod
    def generate_toc(cls, sections: List[Dict]) -> str:
        toc = "<div style='page-break-before: always;'></div>\n\n"
        toc += "<h2 style='color: #2c3e50; text-align: center;'>Table of Contents</h2>\n\n"
        toc += "<nav style='background-color: #f8f9fa; padding: 20px; border-radius: 5px; line-height: 1.6;'>\n\n"
        for section in sections:
            section_number = section['SectionNumber']
            section_title = section['Title']
            toc += f"<p><a href='#{cls.slugify(section_title)}' style='color: #3498db; text-decoration: none;'>{section_number}. {section_title}</a></p>\n\n"
            
            for subsection in section.get('Subsections', []):
                subsection_number = subsection['SectionNumber']
                subsection_title = subsection['Title']
                toc += f"<p style='margin-left: 20px;'><a href='#{cls.slugify(subsection_title)}' style='color: #2980b9; text-decoration: none;'>{subsection_number} {subsection_title}</a></p>\n\n"
        
        toc += "</nav>\n\n"
        return toc

    @classmethod
    def convert_to_markdown(cls, document: Dict) -> str:
        markdown = "<div style='text-align: center; padding-top: 33vh;'>\n\n"
        markdown += f"<h1 style='color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; display: inline-block;'>{document['Title']}</h1>\n\n"
        markdown += f"<p style='color: #7f8c8d;'><em>By {document['Author']}</em></p>\n\n"
        markdown += f"<p style='color: #95a5a6;'>Version {document['Version']} | {document['Date']}</p>\n\n"
        markdown += "</div>\n\n"
        
        markdown += cls.generate_toc(document['Sections'])
        
        markdown += "<div style='max-width: 800px; margin: 0 auto; font-family: \"Segoe UI\", Arial, sans-serif; line-height: 1.6;'>\n\n"
        
        for section in document['Sections']:
            markdown += "<div style='page-break-before: always;'></div>\n\n"
            section_number = section['SectionNumber']
            section_title = section['Title']
            markdown += f"<h2 id='{cls.slugify(section_title)}' style='color: #2c3e50; border-bottom: 1px solid #bdc3c7; padding-bottom: 5px;'>{section_number}. {section_title}</h2>\n\n"
            markdown += f"<div style='color: #34495e; margin-bottom: 20px;'>\n\n{section['Content']}\n\n</div>\n\n"
            
            for subsection in section.get('Subsections', []):
                subsection_number = subsection['SectionNumber']
                subsection_title = subsection['Title']
                markdown += f"<h3 id='{cls.slugify(subsection_title)}' style='color: #34495e;'>{subsection_number} {subsection_title}</h3>\n\n"
                markdown += f"<div style='color: #34495e; margin-bottom: 20px;'>\n\n{subsection['Content']}\n\n</div>\n\n"
        
        markdown += "</div>"
        return markdown

router = APIRouter()

class DocumentRequest(BaseModel):
    query: str
    template: bool = False

class JsonDocumentResponse(BaseModel):
    json_document: Dict

class MarkdownDocumentRequest(BaseModel):
    json_document: Dict
    query: str
    template: bool = False

MESSAGE_DELIMITER = b"\n---DELIMITER---\n"

def yield_message(message):
    message_json = json.dumps(message, ensure_ascii=False).encode('utf-8')
    return message_json + MESSAGE_DELIMITER

async def generate_document_stream(document_generator: DocumentGenerator, document_outline: Dict, query: str, template: bool = False):
    document_generator.document_outline = document_outline
    db_manager = DatabaseManager()
    overall_objective = query
    document_layout = json.dumps(document_generator.document_outline, indent=2)

    SECTION_PROMPT_SYSTEM = DOCUMENT_SECTION_PROMPT_SYSTEM if not template else DOCUMENT_TEMPLATE_SECTION_PROMPT_SYSTEM
    document_generator.content_messages = [
        {
            "role": "system",
            "content": SECTION_PROMPT_SYSTEM.format(
                overall_objective=overall_objective,
                document_layout=document_layout
            )
        }
    ]

    for section in document_generator.document_outline["Document"].get("Sections", []):
        section_title = section.get("Title", "")
        section_number = section.get("SectionNumber", "")
        content_instruction = section.get("Content", "")
        logging.info(f"Generating content for section: {section_title}")
        content = document_generator.generate_content(section_title, content_instruction, section_number, template)
        section["Content"] = content
        yield yield_message({
            "type": "document_section",
            "content": {
                "section_number": section_number,
                "section_title": section_title,
                "content": content
            }
        })

        for subsection in section.get("Subsections", []):
            subsection_title = subsection.get("Title", "")
            subsection_number = subsection.get("SectionNumber", "")
            subsection_content_instruction = subsection.get("Content", "")
            logging.info(f"Generating content for subsection: {subsection_title}")
            content = document_generator.generate_content(subsection_title, subsection_content_instruction, subsection_number, template)
            subsection["Content"] = content
            yield yield_message({
                "type": "document_section",
                "content": {
                    "section_number": subsection_number,
                    "section_title": subsection_title,
                    "content": content
                }
            })

    markdown_document = MarkdownConverter.convert_to_markdown(document_generator.document_outline["Document"])
    
    yield yield_message({
        "type": "complete_document",
        "content": {
            "markdown": markdown_document,
            "json": document_generator.document_outline
                    },
            });

    db_manager.update_database("elevatics", query, markdown_document)


@cache(expire=600*24*7)
@router.post("/generate-document/json", response_model=JsonDocumentResponse)
async def generate_document_outline_endpoint(request: DocumentRequest):
    ai_client = AIClient()
    document_generator = DocumentGenerator(ai_client)
    
    try:
        json_document = document_generator.generate_document_outline(request.query, request.template)
        
        if json_document is None:
            raise HTTPException(status_code=500, detail="Failed to generate a valid document outline")
        
        return JsonDocumentResponse(json_document=json_document)
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

@router.post("/generate-document/markdown-stream")
async def generate_markdown_document_stream_endpoint(request: MarkdownDocumentRequest):
    ai_client = AIClient()
    document_generator = DocumentGenerator(ai_client)
    
    async def stream_generator():
        try:
            async for chunk in generate_document_stream(document_generator, request.json_document, request.query, request.template):
                yield chunk
        except Exception as e:
            yield yield_message({
                "type": "error",
                "content": str(e)
            })

    return StreamingResponse(stream_generator(), media_type="application/octet-stream")

###########################################
class MarkdownDocumentResponse(BaseModel):
    markdown_document: str

@router.post("/generate-document-test", response_model=MarkdownDocumentResponse)
async def test_generate_document_endpoint(request: DocumentRequest):
    try:
        # Load JSON document from file
        json_path = os.path.join("output/document_generator", "ai-chatbot-prd.json")
        with open(json_path, "r") as json_file:
            json_document = json.load(json_file)

        # Load Markdown document from file
        md_path = os.path.join("output/document_generator", "ai-chatbot-prd.md")
        with open(md_path, "r") as md_file:
            markdown_document = md_file.read()

        return MarkdownDocumentResponse(markdown_document=markdown_document)
    except FileNotFoundError:
        raise HTTPException(status_code=404, detail="Test files not found")
    except json.JSONDecodeError:
        raise HTTPException(status_code=500, detail="Error parsing JSON file")
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

class CacheTestResponse(BaseModel):
    result: str
    execution_time: float

@router.get("/test-cache/{test_id}", response_model=CacheTestResponse)
@cache(expire=60)  # Cache for 1 minute
async def test_cache(test_id: int):
    start_time = time.time()
    
    # Simulate some time-consuming operation
    await asyncio.sleep(2)
    
    result = f"Test result for ID: {test_id}"
    
    end_time = time.time()
    execution_time = end_time - start_time
    
    return CacheTestResponse(
        result=result,
        execution_time=execution_time
    )