"""
Cloudflare Integration API Router

Provides scaffolded endpoints for managing Cloudflare resources including zones,
DNS records, Workers, and webhooks. These endpoints currently return placeholder
responses to validate client integrations and will be wired to the real
Cloudflare API in a future iteration.
"""

from datetime import datetime
from typing import Dict, List, Optional
import os

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

from app.auth import get_current_user
from app.models import User

router = APIRouter(prefix="/api/cloudflare", tags=["cloudflare"])

CLOUDFLARE_API_URL = "https://api.cloudflare.com/client/v4"
CLOUDFLARE_API_TOKEN = os.getenv("CLOUDFLARE_API_TOKEN")
CLOUDFLARE_ACCOUNT_ID = os.getenv("CLOUDFLARE_ACCOUNT_ID")


class CloudflareZone(BaseModel):
    """Cloudflare zone model"""

    id: str
    name: str
    status: str = "active"
    plan: str = "pro"
    created_at: datetime


class DNSRecordCreate(BaseModel):
    """DNS record creation payload"""

    type: str = "A"
    name: str
    content: str
    ttl: int = 3600
    proxied: bool = True


class WorkerDeployment(BaseModel):
    """Worker deployment payload"""

    name: str
    script: str
    env_vars: Optional[Dict[str, str]] = None


class WebhookRegistration(BaseModel):
    """Webhook registration payload"""

    name: str
    destination_url: str
    events: List[str]


def _ensure_configured() -> None:
    """Validate Cloudflare environment configuration is present"""

    if not CLOUDFLARE_API_TOKEN:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Cloudflare API token not configured",
        )

    if not CLOUDFLARE_ACCOUNT_ID:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Cloudflare account ID not configured",
        )


@router.get("/zones", response_model=List[CloudflareZone])
async def list_zones(current_user: User = Depends(get_current_user)) -> List[CloudflareZone]:
    """Return placeholder zones to validate client integration flows"""

    _ensure_configured()

    now = datetime.utcnow()
    return [
        CloudflareZone(
            id="placeholder-zone-1",
            name="example.com",
            created_at=now,
        ),
        CloudflareZone(
            id="placeholder-zone-2",
            name="blackroad.dev",
            created_at=now,
            plan="enterprise",
        ),
    ]


@router.post("/zones", status_code=status.HTTP_202_ACCEPTED)
async def create_zone(
    zone: CloudflareZone, current_user: User = Depends(get_current_user)
) -> Dict[str, str]:
    """Accept zone details and return a scaffolded provisioning response"""

    _ensure_configured()

    return {
        "message": "Zone provisioning queued (placeholder)",
        "zone_name": zone.name,
        "zone_id": zone.id,
        "api_base": CLOUDFLARE_API_URL,
    }


@router.get("/zones/{zone_id}/dns")
async def list_dns_records(
    zone_id: str, current_user: User = Depends(get_current_user)
) -> Dict[str, List[Dict[str, str]]]:
    """Return placeholder DNS records for a zone"""

    _ensure_configured()

    return {
        "zone_id": zone_id,
        "records": [
            {
                "id": "placeholder-dns-1",
                "type": "A",
                "name": "@",
                "content": "203.0.113.10",
                "proxied": True,
            },
            {
                "id": "placeholder-dns-2",
                "type": "CNAME",
                "name": "www",
                "content": "example.com",
                "proxied": False,
            },
        ],
    }


@router.post("/zones/{zone_id}/dns", status_code=status.HTTP_202_ACCEPTED)
async def create_dns_record(
    zone_id: str,
    record: DNSRecordCreate,
    current_user: User = Depends(get_current_user),
) -> Dict[str, str]:
    """Return placeholder acknowledgement for DNS record creation"""

    _ensure_configured()

    return {
        "message": "DNS record creation queued (placeholder)",
        "zone_id": zone_id,
        "record_type": record.type,
        "record_name": record.name,
    }


@router.get("/workers")
async def list_workers(current_user: User = Depends(get_current_user)) -> Dict[str, List[Dict[str, str]]]:
    """Return placeholder Workers bound to the account"""

    _ensure_configured()

    return {
        "account_id": CLOUDFLARE_ACCOUNT_ID,
        "workers": [
            {
                "name": "edge-cache",
                "status": "deployed",
                "last_published": datetime.utcnow().isoformat(),
            },
            {
                "name": "image-resize",
                "status": "draft",
                "last_published": None,
            },
        ],
    }


@router.post("/workers/deploy", status_code=status.HTTP_202_ACCEPTED)
async def deploy_worker(
    deployment: WorkerDeployment, current_user: User = Depends(get_current_user)
) -> Dict[str, str]:
    """Return placeholder acknowledgement for Worker deployment"""

    _ensure_configured()

    return {
        "message": "Worker deployment queued (placeholder)",
        "worker_name": deployment.name,
        "script_preview": deployment.script[:50],
    }


@router.post("/webhooks", status_code=status.HTTP_202_ACCEPTED)
async def register_webhook(
    webhook: WebhookRegistration, current_user: User = Depends(get_current_user)
) -> Dict[str, str]:
    """Return placeholder webhook registration response"""

    _ensure_configured()

    return {
        "message": "Webhook registration accepted (placeholder)",
        "webhook_name": webhook.name,
        "destination": webhook.destination_url,
        "events": ",".join(webhook.events),
    }