# imports
import gradio as gr
from crewai import Agent, Task, Crew
from crewai_tools import ScrapeWebsiteTool
import os
import queue
import threading
import asyncio
from typing import List, Dict, Generator

# Message Queue System to manage flow of message
class SupportMessageQueue:
    def __init__(self):
        self.message_queue = queue.Queue()
        self.last_agent = None

    def add_message(self, message: Dict):
        print(f"Adding message to queue: {message}")
        self.message_queue.put(message)

    def get_messages(self) -> List[Dict]:
        messages = []
        while not self.message_queue.empty():
            messages.append(self.message_queue.get())
        return messages

# main class
class SupportCrew:
    def __init__(self, api_key: str = None):
        self.api_key = api_key
        self.message_queue = SupportMessageQueue()
        self.support_agent = None
        self.qa_agent = None
        self.current_agent = None
        self.scrape_tool = None

    # agent initialization with role, goal, and backstory
    def initialize_agents(self, website_url: str):
        if not self.api_key:
            raise ValueError("OpenAI API key is required")

        os.environ["OPENAI_API_KEY"] = self.api_key
        self.scrape_tool = ScrapeWebsiteTool(website_url=website_url)

        self.support_agent = Agent(
            role="Senior Support Representative",
            goal="Be the most friendly and helpful support representative in your team",
            backstory=(
                "You work at crewAI and are now working on providing support to customers. "
                "You need to make sure that you provide the best support! "
                "Make sure to provide full complete answers, and make no assumptions."
            ),
            allow_delegation=False,
            verbose=True
        )

        self.qa_agent = Agent(
            role="Support Quality Assurance Specialist",
            goal="Get recognition for providing the best support quality assurance in your team",
            backstory=(
                "You work at crewAI and are now working with your team on customer requests "
                "ensuring that the support representative is providing the best support possible. "
                "You need to make sure that the support representative is providing full "
                "complete answers, and make no assumptions."
            ),
            verbose=True
        )

    # task creation with description and expected output format and tools
    def create_tasks(self, inquiry: str) -> List[Task]:
        inquiry_resolution = Task(
            description=(
                f"A customer just reached out with a super important ask:\n{inquiry}\n\n"
                "Make sure to use everything you know to provide the best support possible. "
                "You must strive to provide a complete and accurate response to the customer's inquiry."
            ),
            expected_output=(
                "A detailed, informative response to the customer's inquiry that addresses "
                "all aspects of their question.\n"
                "The response should include references to everything you used to find the answer, "
                "including external data or solutions. Ensure the answer is complete, "
                "leaving no questions unanswered, and maintain a helpful and friendly tone throughout."
            ),
            tools=[self.scrape_tool],
            agent=self.support_agent
        )

        quality_assurance_review = Task(
            description=(
                "Review the response drafted by the Senior Support Representative for the customer's inquiry. "
                "Ensure that the answer is comprehensive, accurate, and adheres to the "
                "high-quality standards expected for customer support.\n"
                "Verify that all parts of the customer's inquiry have been addressed "
                "thoroughly, with a helpful and friendly tone.\n"
                "Check for references and sources used to find the information, "
                "ensuring the response is well-supported and leaves no questions unanswered."
            ),
            expected_output=(
                "A final, detailed, and informative response ready to be sent to the customer.\n"
                "This response should fully address the customer's inquiry, incorporating all "
                "relevant feedback and improvements.\n"
                "Don't be too formal, maintain a professional and friendly tone throughout."
            ),
            agent=self.qa_agent
        )

        return [inquiry_resolution, quality_assurance_review]

    # main processing function
    async def process_support(self, inquiry: str, website_url: str) -> Generator[List[Dict], None, None]:
        def add_agent_messages(agent_name: str, tasks: str, emoji: str = "🤖"):
            self.message_queue.add_message({
                "role": "assistant",
                "content": agent_name,
                "metadata": {"title": f"{emoji} {agent_name}"}
            })
            
            self.message_queue.add_message({
                "role": "assistant",
                "content": tasks,
                "metadata": {"title": f"📋 Task for {agent_name}"}
            })

        # Manages transition between agents
        def setup_next_agent(current_agent: str) -> None:
            if current_agent == "Senior Support Representative":
                self.current_agent = "Support Quality Assurance Specialist"
                add_agent_messages(
                    "Support Quality Assurance Specialist",
                    "Review and improve the support representative's response"
                )

        def task_callback(task_output) -> None:
            print(f"Task callback received: {task_output}")
            
            raw_output = task_output.raw
            if "## Final Answer:" in raw_output:
                content = raw_output.split("## Final Answer:")[1].strip()
            else:
                content = raw_output.strip()
            
            if self.current_agent == "Support Quality Assurance Specialist":
                self.message_queue.add_message({
                    "role": "assistant",
                    "content": "Final response is ready!",
                    "metadata": {"title": "✅ Final Response"}
                })
                
                formatted_content = content
                formatted_content = formatted_content.replace("\n#", "\n\n#")
                formatted_content = formatted_content.replace("\n-", "\n\n-")
                formatted_content = formatted_content.replace("\n*", "\n\n*")
                formatted_content = formatted_content.replace("\n1.", "\n\n1.")
                formatted_content = formatted_content.replace("\n\n\n", "\n\n")
                
                self.message_queue.add_message({
                    "role": "assistant",
                    "content": formatted_content
                })
            else:
                self.message_queue.add_message({
                    "role": "assistant",
                    "content": content,
                    "metadata": {"title": f"✨ Output from {self.current_agent}"}
                })
                setup_next_agent(self.current_agent)

        try:
            self.initialize_agents(website_url)
            self.current_agent = "Senior Support Representative"

            yield [{
                "role": "assistant",
                "content": "Starting to process your inquiry...",
                "metadata": {"title": "🚀 Process Started"}
            }]

            add_agent_messages(
                "Senior Support Representative",
                "Analyze customer inquiry and provide comprehensive support"
            )

            crew = Crew(
                agents=[self.support_agent, self.qa_agent],
                tasks=self.create_tasks(inquiry),
                verbose=True,
                task_callback=task_callback
            )

            def run_crew():
                try:
                    crew.kickoff()
                except Exception as e:
                    print(f"Error in crew execution: {str(e)}")
                    self.message_queue.add_message({
                        "role": "assistant",
                        "content": f"An error occurred: {str(e)}",
                        "metadata": {"title": "❌ Error"}
                    })

            thread = threading.Thread(target=run_crew)
            thread.start()

            while thread.is_alive() or not self.message_queue.message_queue.empty():
                messages = self.message_queue.get_messages()
                if messages:
                    print(f"Yielding messages: {messages}")
                    yield messages
                await asyncio.sleep(0.1)

        except Exception as e:
            print(f"Error in process_support: {str(e)}")
            yield [{
                "role": "assistant",
                "content": f"An error occurred: {str(e)}",
                "metadata": {"title": "❌ Error"}
            }]

def create_demo():
    support_crew = None

    with gr.Blocks(theme=gr.themes.Ocean()) as demo:
        gr.Markdown("# 🎯 AI Customer Support Crew")
        gr.Markdown("This is a friendly, high-performing multi-agent application built with Gradio and CrewAI. Enter a webpage URL and your questions from that webpage.")
        openai_api_key = gr.Textbox(
            label='OpenAI API Key',
            type='password',
            placeholder='Type your OpenAI API Key and press Enter to access the app...',
            interactive=True
        )

        chatbot = gr.Chatbot(
            label="Support Process",
            height=700,
            type="messages",
            show_label=True,
            visible=False,
            avatar_images=(None, "https://avatars.githubusercontent.com/u/170677839?v=4"),
            render_markdown=True
        )

        with gr.Row(equal_height=True):
            inquiry = gr.Textbox(
                label="Your Inquiry",
                placeholder="Enter your question...",
                scale=4,
                visible=False
            )
            website_url = gr.Textbox(
                label="Documentation URL",
                placeholder="Enter documentation URL to search...",
                scale=4,
                visible=False
            )
            btn = gr.Button("Get Support", variant="primary", scale=1, visible=False)

        async def process_input(inquiry_text, website_url_text, history, api_key):
            nonlocal support_crew
            if not api_key:
                history = history or []
                history.append({
                    "role": "assistant",
                    "content": "Please provide an OpenAI API key.",
                    "metadata": {"title": "❌ Error"}
                })
                yield history
                return

            if support_crew is None:
                support_crew = SupportCrew(api_key=api_key)

            history = history or []
            history.append({
                "role": "user", 
                "content": f"Question: {inquiry_text}\nDocumentation: {website_url_text}"
            })
            yield history

            try:
                async for messages in support_crew.process_support(inquiry_text, website_url_text):
                    history.extend(messages)
                    yield history
            except Exception as e:
                history.append({
                    "role": "assistant",
                    "content": f"An error occurred: {str(e)}",
                    "metadata": {"title": "❌ Error"}
                })
                yield history

        def show_interface():
            return {
                openai_api_key: gr.Textbox(visible=False),
                chatbot: gr.Chatbot(visible=True),
                inquiry: gr.Textbox(visible=True),
                website_url: gr.Textbox(visible=True),
                btn: gr.Button(visible=True)
            }

        openai_api_key.submit(show_interface, None, [openai_api_key, chatbot, inquiry, website_url, btn])
        btn.click(process_input, [inquiry, website_url, chatbot, openai_api_key], [chatbot])
        inquiry.submit(process_input, [inquiry, website_url, chatbot, openai_api_key], [chatbot])

    return demo

if __name__ == "__main__":
    demo = create_demo()
    demo.queue()
    demo.launch(debug=True)