# app/modules/billing/routes/api/vendor_addons.py
"""
Vendor add-on management endpoints.

Provides:
- List available add-ons
- Get vendor's purchased add-ons
- Purchase add-on
- Cancel add-on

All routes require module access control for the 'billing' module.
"""

import logging

from fastapi import APIRouter, Depends, Query
from pydantic import BaseModel
from sqlalchemy.orm import Session

from app.api.deps import get_current_vendor_api, require_module_access
from app.core.config import settings
from app.core.database import get_db
from app.modules.billing.services import billing_service
from app.modules.enums import FrontendType
from models.schema.auth import UserContext

vendor_addons_router = APIRouter(
    prefix="/addons",
    dependencies=[Depends(require_module_access("billing", FrontendType.VENDOR))],
)
logger = logging.getLogger(__name__)


# ============================================================================
# Schemas
# ============================================================================


class AddOnResponse(BaseModel):
    """Add-on product information."""

    id: int
    code: str
    name: str
    description: str | None = None
    category: str
    price_cents: int
    billing_period: str
    quantity_unit: str | None = None
    quantity_value: int | None = None


class VendorAddOnResponse(BaseModel):
    """Vendor's purchased add-on."""

    id: int
    addon_code: str
    addon_name: str
    status: str
    domain_name: str | None = None
    quantity: int
    period_start: str | None = None
    period_end: str | None = None


class AddOnPurchaseRequest(BaseModel):
    """Request to purchase an add-on."""

    addon_code: str
    domain_name: str | None = None  # For domain add-ons
    quantity: int = 1


class AddOnCancelResponse(BaseModel):
    """Response for add-on cancellation."""

    message: str
    addon_code: str


# ============================================================================
# Endpoints
# ============================================================================


@vendor_addons_router.get("", response_model=list[AddOnResponse])
def get_available_addons(
    category: str | None = Query(None, description="Filter by category"),
    current_user: UserContext = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """Get available add-on products."""
    addons = billing_service.get_available_addons(db, category=category)

    return [
        AddOnResponse(
            id=addon.id,
            code=addon.code,
            name=addon.name,
            description=addon.description,
            category=addon.category,
            price_cents=addon.price_cents,
            billing_period=addon.billing_period,
            quantity_unit=addon.quantity_unit,
            quantity_value=addon.quantity_value,
        )
        for addon in addons
    ]


@vendor_addons_router.get("/my-addons", response_model=list[VendorAddOnResponse])
def get_vendor_addons(
    current_user: UserContext = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """Get vendor's purchased add-ons."""
    vendor_id = current_user.token_vendor_id

    vendor_addons = billing_service.get_vendor_addons(db, vendor_id)

    return [
        VendorAddOnResponse(
            id=va.id,
            addon_code=va.addon_product.code,
            addon_name=va.addon_product.name,
            status=va.status,
            domain_name=va.domain_name,
            quantity=va.quantity,
            period_start=va.period_start.isoformat() if va.period_start else None,
            period_end=va.period_end.isoformat() if va.period_end else None,
        )
        for va in vendor_addons
    ]


@vendor_addons_router.post("/purchase")
def purchase_addon(
    request: AddOnPurchaseRequest,
    current_user: UserContext = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """Purchase an add-on product."""
    vendor_id = current_user.token_vendor_id
    vendor = billing_service.get_vendor(db, vendor_id)

    # Build URLs
    base_url = f"https://{settings.platform_domain}"
    success_url = f"{base_url}/vendor/{vendor.vendor_code}/billing?addon_success=true"
    cancel_url = f"{base_url}/vendor/{vendor.vendor_code}/billing?addon_cancelled=true"

    result = billing_service.purchase_addon(
        db=db,
        vendor_id=vendor_id,
        addon_code=request.addon_code,
        domain_name=request.domain_name,
        quantity=request.quantity,
        success_url=success_url,
        cancel_url=cancel_url,
    )
    db.commit()

    return result


@vendor_addons_router.delete("/{addon_id}", response_model=AddOnCancelResponse)
def cancel_addon(
    addon_id: int,
    current_user: UserContext = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """Cancel a purchased add-on."""
    vendor_id = current_user.token_vendor_id

    result = billing_service.cancel_addon(db, vendor_id, addon_id)
    db.commit()

    return AddOnCancelResponse(
        message=result["message"],
        addon_code=result["addon_code"],
    )