# 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}/dashboard    → Vendor dashboard
- 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 fastapi.templating import Jinja2Templates
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.content_page_service import content_page_service
from models.database.user import User

logger = logging.getLogger(__name__)

router = APIRouter()
templates = Jinja2Templates(directory="app/templates")


# ============================================================================
# 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}/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),
):
    """
    Render vendor dashboard.

    JavaScript will:
    - Load vendor info via API
    - Load dashboard stats via API
    - Load recent orders via API
    - Handle all interactivity
    """
    return templates.TemplateResponse(
        "vendor/dashboard.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": 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),
):
    """
    Render products management page.
    JavaScript loads product list via API.
    """
    return templates.TemplateResponse(
        "vendor/products.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": 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),
):
    """
    Render orders management page.
    JavaScript loads order list via API.
    """
    return templates.TemplateResponse(
        "vendor/orders.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": vendor_code,
        },
    )


# ============================================================================
# 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),
):
    """
    Render customers management page.
    JavaScript loads customer list via API.
    """
    return templates.TemplateResponse(
        "vendor/customers.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": vendor_code,
        },
    )


# ============================================================================
# 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),
):
    """
    Render inventory management page.
    JavaScript loads inventory data via API.
    """
    return templates.TemplateResponse(
        "vendor/inventory.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": 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),
):
    """
    Render marketplace import page.
    JavaScript loads import jobs and products via API.
    """
    return templates.TemplateResponse(
        "vendor/marketplace.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": 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),
):
    """
    Render Letzshop integration page.
    JavaScript loads orders, credentials status, and handles fulfillment operations.
    """
    return templates.TemplateResponse(
        "vendor/letzshop.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": 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),
):
    """
    Render team management page.
    JavaScript loads team members via API.
    """
    return templates.TemplateResponse(
        "vendor/team.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": 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),
):
    """
    Render vendor profile page.
    User can manage their personal profile information.
    """
    return templates.TemplateResponse(
        "vendor/profile.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": 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),
):
    """
    Render vendor settings page.
    JavaScript loads settings via API.
    """
    return templates.TemplateResponse(
        "vendor/settings.html",
        {
            "request": request,
            "user": current_user,
            "vendor_code": vendor_code,
        },
    )


# ============================================================================
# DYNAMIC CONTENT PAGES (CMS)
# ============================================================================


@router.get(
    "/{vendor_code}/{slug}", response_class=HTMLResponse, include_in_schema=False
)
async def vendor_content_page(
    request: Request,
    vendor_code: str = Path(..., description="Vendor code"),
    slug: str = Path(..., description="Content page slug"),
    db: Session = Depends(get_db),
):
    """
    Generic content page handler for vendor shop (CMS).

    Handles dynamic content pages like:
    - /vendors/wizamart/about, /vendors/wizamart/faq, /vendors/wizamart/contact, etc.

    Features:
    - Two-tier system: Vendor overrides take priority, fallback to platform defaults
    - Only shows published pages
    - Returns 404 if page not found or unpublished

    NOTE: This is a catch-all route and must be registered LAST to avoid
    shadowing other specific routes.
    """
    logger.debug(
        "[VENDOR_HANDLER] vendor_content_page REACHED",
        extra={
            "path": request.url.path,
            "vendor_code": vendor_code,
            "slug": slug,
            "vendor": getattr(request.state, "vendor", "NOT SET"),
            "context": getattr(request.state, "context_type", "NOT SET"),
        },
    )

    vendor = getattr(request.state, "vendor", None)
    vendor_id = vendor.id if vendor else None

    # Load content page from database (vendor override → platform default)
    page = content_page_service.get_page_for_vendor(
        db, slug=slug, vendor_id=vendor_id, include_unpublished=False
    )

    if not page:
        logger.info(
            f"[VENDOR_HANDLER] Content page not found: {slug}",
            extra={
                "slug": slug,
                "vendor_code": vendor_code,
                "vendor_id": vendor_id,
            },
        )
        raise HTTPException(status_code=404, detail="Page not found")

    logger.info(
        f"[VENDOR_HANDLER] Rendering CMS page: {page.title}",
        extra={
            "slug": slug,
            "page_id": page.id,
            "is_vendor_override": page.vendor_id is not None,
            "vendor_id": vendor_id,
        },
    )

    return templates.TemplateResponse(
        "shop/content-page.html",
        {
            "request": request,
            "page": page,
            "vendor_code": vendor_code,
        },
    )