"""
OPC Agents Router
"""

from fastapi import APIRouter, Depends, HTTPException, Request
from pydantic import BaseModel

from db import opc_db
from rbac import User, require_admin

router = APIRouter()


class AgentUpdate(BaseModel):
    name: str | None = None
    description: str | None = None
    system_prompt: str | None = None
    enabled: bool | None = None


class ExecutionApproval(BaseModel):
    approved: bool
    feedback: str | None = None


@router.get("/agents")
async def list_agents(
    request: Request,
    enabled_only: bool = True,
):
    """List all agents"""
    user: User = request.state.user
    agents = await opc_db.get_agents(enabled_only=enabled_only)
    return {"items": agents}


@router.get("/agents/{agent_id}")
async def get_agent(
    agent_id: str,
    request: Request,
):
    """Get agent details"""
    user: User = request.state.user
    agent = await opc_db.get_agent(agent_id)
    if not agent:
        raise HTTPException(status_code=404, detail="Agent not found")
    return agent


@router.put("/agents/{agent_id}", dependencies=[Depends(require_admin())])
async def update_agent(
    agent_id: str,
    updates: AgentUpdate,
    request: Request,
):
    """Update agent configuration (admin only)"""
    user: User = request.state.user
    try:
        agent = await opc_db.update_agent_config(
            agent_id=agent_id,
            name=updates.name,
            description=updates.description,
            system_prompt=updates.system_prompt,
            enabled=updates.enabled,
        )
        return agent
    except ValueError as e:
        raise HTTPException(status_code=404, detail=str(e))


@router.post("/agents/{agent_id}/execute")
async def trigger_agent(
    agent_id: str,
    task_id: int,
    request: Request,
):
    """Manually trigger agent execution"""
    user: User = request.state.user
    execution = await opc_db.create_agent_execution(task_id=task_id, agent_id=agent_id, actor=user.username)
    return execution


@router.get("/executions")
async def list_executions(
    request: Request,
    task_id: int | None = None,
    agent_id: str | None = None,
    status: str | None = None,
    limit: int = 50,
):
    """List agent executions"""
    user: User = request.state.user
    executions = await opc_db.get_agent_executions(task_id=task_id, agent_id=agent_id, status=status, limit=limit)
    return {"items": executions}


@router.get("/executions/{execution_id}")
async def get_execution(
    execution_id: int,
    request: Request,
):
    """Get execution details"""
    user: User = request.state.user
    execution = await opc_db.get_agent_execution(execution_id)
    if not execution:
        raise HTTPException(status_code=404, detail="Execution not found")
    return execution


@router.post("/executions/{execution_id}/approve")
async def approve_execution(
    execution_id: int,
    approval: ExecutionApproval,
    request: Request,
):
    """Approve or reject agent execution (for CxO level actions)"""
    user: User = request.state.user
    try:
        execution = await opc_db.approve_agent_execution(
            execution_id=execution_id, approved=approval.approved, approved_by=user.username, feedback=approval.feedback
        )
        return execution
    except ValueError as e:
        raise HTTPException(status_code=404, detail=str(e))