async def prompt_chain(input_text):
    # Step 1: Extract key information
    extracted = await llm.generate(
        "Extract the main entities and relationships from: " + input_text
    )

    # Step 2: Analyze
    analysis = await llm.generate(
        "Analyze these entities for patterns: " + extracted
    )

    # Step 3: Generate output
    return await llm.generate(
        "Based on this analysis, provide recommendations: " + analysis
    )

async def route_request(user_input):
    # Classify the input
    category = await llm.generate(
        f"Classify this request into one of: [billing, technical, general]\n{user_input}"
    )

    handlers = {
        "billing": handle_billing,
        "technical": handle_technical,
        "general": handle_general,
    }

    return await handlers[category.strip()](user_input)

import asyncio

async def parallel_analysis(document):
    # Run independent analyses in parallel
    results = await asyncio.gather(
        llm.generate(f"Summarize: {document}"),
        llm.generate(f"Extract key facts: {document}"),
        llm.generate(f"Identify sentiment: {document}"),
    )

    summary, facts, sentiment = results
    return {"summary": summary, "facts": facts, "sentiment": sentiment}

class Orchestrator:
    async def run(self, task):
        # Break down the task
        subtasks = await self.plan(task)

        # Delegate to workers
        results = []
        for subtask in subtasks:
            worker_result = await self.delegate(subtask)
            results.append(worker_result)

        # Synthesize results
        return await self.synthesize(results)

    async def plan(self, task):
        response = await llm.generate(
            f"Break this task into subtasks:\n{task}\n\nReturn as JSON array."
        )
        return json.loads(response)

    async def delegate(self, subtask):
        return await llm.generate(f"Complete this subtask:\n{subtask}")

    async def synthesize(self, results):
        return await llm.generate(
            f"Combine these results into a coherent response:\n{results}"
        )

async def generate_with_feedback(task, max_iterations=3):
    response = await llm.generate(f"Complete this task:\n{task}")

    for _ in range(max_iterations):
        evaluation = await llm.generate(
            f"Evaluate this response for quality and correctness:\n{response}\n"
            "If improvements needed, specify them. Otherwise respond 'APPROVED'."
        )

        if "APPROVED" in evaluation:
            return response

        response = await llm.generate(
            f"Improve this response based on feedback:\n"
            f"Original: {response}\nFeedback: {evaluation}"
        )

    return response

class Agent:
    def __init__(self, tools: list, system_prompt: str):
        self.tools = {t.name: t for t in tools}
        self.system_prompt = system_prompt

    async def run(self, task: str, max_steps: int = 10):
        messages = [
            {"role": "system", "content": self.system_prompt},
            {"role": "user", "content": task},
        ]

        for step in range(max_steps):
            response = await llm.generate(messages, tools=self.tools)
            messages.append({"role": "assistant", "content": response})

            if response.tool_calls:
                for call in response.tool_calls:
                    result = await self.execute_tool(call)
                    messages.append({
                        "role": "tool",
                        "tool_call_id": call.id,
                        "content": result
                    })
            else:
                # No tool calls - agent is done
                return response.content

        return "Max steps reached"

    async def execute_tool(self, call):
        tool = self.tools[call.name]
        return await tool.execute(**call.arguments)

class HumanInLoopAgent(Agent):
    def __init__(self, tools, system_prompt, approval_required: list):
        super().__init__(tools, system_prompt)
        self.approval_required = set(approval_required)

    async def execute_tool(self, call):
        if call.name in self.approval_required:
            approved = await self.request_approval(call)
            if not approved:
                return "Action cancelled by user"

        return await super().execute_tool(call)

    async def request_approval(self, call):
        print(f"Agent wants to execute: {call.name}({call.arguments})")
        response = input("Approve? (y/n): ")
        return response.lower() == "y"

REACT_PROMPT = """Answer the question using the available tools.

For each step:
1. Thought: Reason about what to do next
2. Action: Choose a tool and inputs
3. Observation: See the result
4. Repeat until you have the answer

Available tools: {tools}

Question: {question}
"""

async def react_agent(question, tools):
    prompt = REACT_PROMPT.format(
        tools=format_tools(tools),
        question=question
    )

    messages = [{"role": "user", "content": prompt}]

    while True:
        response = await llm.generate(messages)
        messages.append({"role": "assistant", "content": response})

        if "Final Answer:" in response:
            return extract_final_answer(response)

        action = parse_action(response)
        if action:
            observation = await execute_tool(action, tools)
            messages.append({
                "role": "user",
                "content": f"Observation: {observation}"
            })

class Tool:
    def __init__(self, name: str, description: str, parameters: dict, fn):
        self.name = name
        self.description = description
        self.parameters = parameters
        self.fn = fn

    async def execute(self, **kwargs):
        try:
            return await self.fn(**kwargs)
        except Exception as e:
            return f"Error: {str(e)}"

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