"""Campaign management module"""
from fastapi import APIRouter
from pydantic import BaseModel
from typing import List, Optional
from datetime import datetime

router = APIRouter(prefix="/campaigns")

class CampaignCreate(BaseModel):
    name: str
    industry: str
    budget: float
    channels: List[str] = ["email"]
    start_date: Optional[str] = None

class CampaignResponse(BaseModel):
    id: int
    name: str
    status: str
    budget: float
    leads_targeted: int
    created_at: str

_campaigns_db = {}
_next_id = 1

@router.post("/", response_model=CampaignResponse)
async def create_campaign(campaign: CampaignCreate):
    global _next_id
    
    # Calculate estimated leads
    leads_targeted = int(campaign.budget * 0.15)
    
    _campaigns_db[_next_id] = {
        "name": campaign.name,
        "industry": campaign.industry,
        "budget": campaign.budget,
        "leads_targeted": leads_targeted,
        "status": "running",
        "created_at": datetime.utcnow().isoformat()
    }
    
    cid = _next_id
    _next_id += 1
    
    return CampaignResponse(
        id=cid,
        name=campaign.name,
        status="running",
        budget=campaign.budget,
        leads_targeted=leads_targeted,
        created_at=datetime.utcnow().isoformat()
    )

@router.get("/", response_model=List[CampaignResponse])
async def list_campaigns():
    return [
        CampaignResponse(
            id=cid,
            name=data["name"],
            status=data["status"],
            budget=data["budget"],
            leads_targeted=data["leads_targeted"],
            created_at=data["created_at"]
        )
        for cid, data in _campaigns_db.items()
    ]