# app/routes/vendor_pages.py
"""
Vendor HTML page routes using Jinja2 templates.

These routes serve HTML pages for vendor-facing interfaces.
Follows the same minimal server-side rendering pattern as admin routes.

All routes except /login require vendor authentication.
Authentication failures redirect to /vendor/{vendor_code}/login.

Routes:
- GET /vendor/{vendor_code}/             → Redirect to login or dashboard
- GET /vendor/{vendor_code}/login        → Vendor login page
- GET /vendor/{vendor_code}/onboarding   → Vendor onboarding wizard
- GET /vendor/{vendor_code}/dashboard    → Vendor dashboard (requires onboarding)
- GET /vendor/{vendor_code}/products     → Product management
- GET /vendor/{vendor_code}/orders       → Order management
- GET /vendor/{vendor_code}/customers    → Customer management
- GET /vendor/{vendor_code}/inventory    → Inventory management
- GET /vendor/{vendor_code}/marketplace  → Marketplace imports
- GET /vendor/{vendor_code}/team         → Team management
- GET /vendor/{vendor_code}/settings     → Vendor settings
"""

import logging

from fastapi import APIRouter, Depends, HTTPException, Path, Request
from fastapi.responses import HTMLResponse, RedirectResponse
from sqlalchemy.orm import Session

from app.api.deps import (
    get_current_vendor_from_cookie_or_header,
    get_current_vendor_optional,
    get_db,
)
from app.services.onboarding_service import OnboardingService
from app.services.platform_settings_service import platform_settings_service
from app.templates_config import templates
from models.database.user import User
from models.database.vendor import Vendor

logger = logging.getLogger(__name__)

router = APIRouter()


# ============================================================================
# HELPER: Build Vendor Dashboard Context
# ============================================================================


def get_vendor_context(
    request: Request,
    db: Session,
    current_user: User,
    vendor_code: str,
    **extra_context,
) -> dict:
    """
    Build template context for vendor dashboard pages.

    Resolves locale/currency using the platform settings service with
    vendor override support:
    1. Vendor's storefront_locale (if set)
    2. Platform's default from PlatformSettingsService
    3. Environment variable
    4. Hardcoded fallback

    Args:
        request: FastAPI request object
        db: Database session
        current_user: Authenticated vendor user
        vendor_code: Vendor subdomain/code
        **extra_context: Additional variables for template

    Returns:
        Dictionary with request, user, vendor, resolved locale/currency, and extra context
    """
    # Load vendor from database
    vendor = db.query(Vendor).filter(Vendor.subdomain == vendor_code).first()

    # Get platform defaults
    platform_config = platform_settings_service.get_storefront_config(db)

    # Resolve with vendor override
    storefront_locale = platform_config["locale"]
    storefront_currency = platform_config["currency"]

    if vendor and vendor.storefront_locale:
        storefront_locale = vendor.storefront_locale

    context = {
        "request": request,
        "user": current_user,
        "vendor": vendor,
        "vendor_code": vendor_code,
        "storefront_locale": storefront_locale,
        "storefront_currency": storefront_currency,
        "dashboard_language": vendor.dashboard_language if vendor else "en",
    }

    # Add any extra context
    if extra_context:
        context.update(extra_context)

    logger.debug(
        "[VENDOR_CONTEXT] Context built",
        extra={
            "vendor_id": vendor.id if vendor else None,
            "vendor_code": vendor_code,
            "storefront_locale": storefront_locale,
            "storefront_currency": storefront_currency,
            "extra_keys": list(extra_context.keys()) if extra_context else [],
        },
    )

    return context


# ============================================================================
# PUBLIC ROUTES (No Authentication Required)
# ============================================================================


@router.get("/{vendor_code}", response_class=RedirectResponse, include_in_schema=False)
async def vendor_root_no_slash(vendor_code: str = Path(..., description="Vendor code")):
    """
    Redirect /vendor/{code} (no trailing slash) to login page.
    Handles requests without trailing slash.
    """
    return RedirectResponse(url=f"/vendor/{vendor_code}/login", status_code=302)


@router.get("/{vendor_code}/", response_class=RedirectResponse, include_in_schema=False)
async def vendor_root(
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User | None = Depends(get_current_vendor_optional),
):
    """
    Redirect /vendor/{code}/ based on authentication status.

    - Authenticated vendor users → /vendor/{code}/dashboard
    - Unauthenticated users → /vendor/{code}/login
    """
    if current_user:
        # User is already logged in as vendor, redirect to dashboard
        return RedirectResponse(url=f"/vendor/{vendor_code}/dashboard", status_code=302)

    return RedirectResponse(url=f"/vendor/{vendor_code}/login", status_code=302)


@router.get(
    "/{vendor_code}/login", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_login_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User | None = Depends(get_current_vendor_optional),
):
    """
    Render vendor login page.

    If user is already authenticated as vendor, redirect to dashboard.
    Otherwise, show login form.

    JavaScript will:
    - Load vendor info via API
    - Handle login form submission
    - Redirect to dashboard on success
    """
    if current_user:
        # User is already logged in as vendor, redirect to dashboard
        return RedirectResponse(url=f"/vendor/{vendor_code}/dashboard", status_code=302)

    return templates.TemplateResponse(
        "vendor/login.html",
        {
            "request": request,
            "vendor_code": vendor_code,
        },
    )


# ============================================================================
# AUTHENTICATED ROUTES (Vendor Users Only)
# ============================================================================


@router.get(
    "/{vendor_code}/onboarding", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_onboarding_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render vendor onboarding wizard.

    Mandatory 4-step wizard that must be completed before accessing dashboard:
    1. Company Profile Setup
    2. Letzshop API Configuration
    3. Product & Order Import Configuration
    4. Order Sync (historical import)

    If onboarding is already completed, redirects to dashboard.
    """
    # Check if onboarding is completed
    onboarding_service = OnboardingService(db)
    if onboarding_service.is_completed(current_user.token_vendor_id):
        return RedirectResponse(
            url=f"/vendor/{vendor_code}/dashboard",
            status_code=302,
        )

    return templates.TemplateResponse(
        "vendor/onboarding.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


@router.get(
    "/{vendor_code}/dashboard", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_dashboard_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render vendor dashboard.

    Redirects to onboarding if not completed.

    JavaScript will:
    - Load vendor info via API
    - Load dashboard stats via API
    - Load recent orders via API
    - Handle all interactivity
    """
    # Check if onboarding is completed
    onboarding_service = OnboardingService(db)
    if not onboarding_service.is_completed(current_user.token_vendor_id):
        return RedirectResponse(
            url=f"/vendor/{vendor_code}/onboarding",
            status_code=302,
        )

    return templates.TemplateResponse(
        "vendor/dashboard.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# PRODUCT MANAGEMENT
# ============================================================================


@router.get(
    "/{vendor_code}/products", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_products_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render products management page.
    JavaScript loads product list via API.
    """
    return templates.TemplateResponse(
        "vendor/products.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


@router.get(
    "/{vendor_code}/products/create", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_product_create_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render product creation page.
    JavaScript handles form submission via API.
    """
    return templates.TemplateResponse(
        "vendor/product-create.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# ORDER MANAGEMENT
# ============================================================================


@router.get(
    "/{vendor_code}/orders", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_orders_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render orders management page.
    JavaScript loads order list via API.
    """
    return templates.TemplateResponse(
        "vendor/orders.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


@router.get(
    "/{vendor_code}/orders/{order_id}",
    response_class=HTMLResponse,
    include_in_schema=False,
)
async def vendor_order_detail_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    order_id: int = Path(..., description="Order ID"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render order detail page.

    Shows comprehensive order information including:
    - Order header and status
    - Customer and shipping details
    - Order items with shipment status
    - Invoice creation/viewing
    - Partial shipment controls

    JavaScript loads order details via API.
    """
    return templates.TemplateResponse(
        "vendor/order-detail.html",
        get_vendor_context(request, db, current_user, vendor_code, order_id=order_id),
    )


# ============================================================================
# CUSTOMER MANAGEMENT
# ============================================================================


@router.get(
    "/{vendor_code}/customers", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_customers_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render customers management page.
    JavaScript loads customer list via API.
    """
    return templates.TemplateResponse(
        "vendor/customers.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# MEDIA LIBRARY
# ============================================================================


@router.get(
    "/{vendor_code}/media", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_media_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render media library page.
    JavaScript loads media files via API.
    """
    return templates.TemplateResponse(
        "vendor/media.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# MESSAGING
# ============================================================================


@router.get(
    "/{vendor_code}/messages", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_messages_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render messages page.
    JavaScript loads conversations and messages via API.
    """
    return templates.TemplateResponse(
        "vendor/messages.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


@router.get(
    "/{vendor_code}/messages/{conversation_id}",
    response_class=HTMLResponse,
    include_in_schema=False,
)
async def vendor_message_detail_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    conversation_id: int = Path(..., description="Conversation ID"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render message detail page.
    Shows the full conversation thread.
    """
    return templates.TemplateResponse(
        "vendor/messages.html",
        get_vendor_context(
            request, db, current_user, vendor_code, conversation_id=conversation_id
        ),
    )


# ============================================================================
# INVENTORY MANAGEMENT
# ============================================================================


@router.get(
    "/{vendor_code}/inventory", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_inventory_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render inventory management page.
    JavaScript loads inventory data via API.
    """
    return templates.TemplateResponse(
        "vendor/inventory.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# MARKETPLACE IMPORTS
# ============================================================================


@router.get(
    "/{vendor_code}/marketplace", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_marketplace_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render marketplace import page.
    JavaScript loads import jobs and products via API.
    """
    return templates.TemplateResponse(
        "vendor/marketplace.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# LETZSHOP INTEGRATION
# ============================================================================


@router.get(
    "/{vendor_code}/letzshop", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_letzshop_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render Letzshop integration page.
    JavaScript loads orders, credentials status, and handles fulfillment operations.
    """
    return templates.TemplateResponse(
        "vendor/letzshop.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# INVOICES
# ============================================================================


@router.get(
    "/{vendor_code}/invoices", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_invoices_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render invoices management page.
    JavaScript loads invoices via API.
    """
    return templates.TemplateResponse(
        "vendor/invoices.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# TEAM MANAGEMENT
# ============================================================================


@router.get("/{vendor_code}/team", response_class=HTMLResponse, include_in_schema=False)
async def vendor_team_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render team management page.
    JavaScript loads team members via API.
    """
    return templates.TemplateResponse(
        "vendor/team.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# PROFILE & SETTINGS
# ============================================================================


@router.get(
    "/{vendor_code}/profile", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_profile_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render vendor profile page.
    User can manage their personal profile information.
    """
    return templates.TemplateResponse(
        "vendor/profile.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


@router.get(
    "/{vendor_code}/settings", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_settings_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render vendor settings page.
    JavaScript loads settings via API.
    """
    return templates.TemplateResponse(
        "vendor/settings.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


@router.get(
    "/{vendor_code}/email-templates", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_email_templates_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render vendor email templates customization page.
    Allows vendors to override platform email templates.
    """
    return templates.TemplateResponse(
        "vendor/email-templates.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


@router.get(
    "/{vendor_code}/billing", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_billing_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render billing and subscription management page.
    JavaScript loads subscription status, tiers, and invoices via API.
    """
    return templates.TemplateResponse(
        "vendor/billing.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# NOTIFICATIONS
# ============================================================================


@router.get(
    "/{vendor_code}/notifications", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_notifications_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    current_user: User = Depends(get_current_vendor_from_cookie_or_header),
    db: Session = Depends(get_db),
):
    """
    Render notifications center page.
    JavaScript loads notifications via API.
    """
    return templates.TemplateResponse(
        "vendor/notifications.html",
        get_vendor_context(request, db, current_user, vendor_code),
    )


# ============================================================================
# ANALYTICS
# ============================================================================
# NOTE: Analytics routes moved to self-contained module: app.modules.analytics.routes.pages.vendor
# Routes are registered directly in main.py from the Analytics module
# This includes:
# - /{vendor_code}/analytics (dashboard)


# ============================================================================
# CONTENT PAGES MANAGEMENT & CMS
# ============================================================================
# NOTE: CMS routes moved to self-contained module: app.modules.cms.routes.pages.vendor
# Routes are registered directly in main.py from the CMS module
# This includes:
# - /{vendor_code}/content-pages (list)
# - /{vendor_code}/content-pages/create
# - /{vendor_code}/content-pages/{page_id}/edit
# - /{vendor_code}/{slug} (catch-all CMS page viewer)