# app/modules/cms/routes/pages/storefront.py
"""
CMS Storefront Page Routes (HTML rendering).

Storefront (customer shop) pages for CMS content:
- Generic content pages (/{slug} catch-all)
- Debug context endpoint
"""

import logging

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

from app.api.deps import get_db
from app.modules.cms.services import content_page_service
from app.modules.core.utils.page_context import get_storefront_context
from app.templates_config import templates

logger = logging.getLogger(__name__)

router = APIRouter()

# Route configuration - high priority so catch-all is registered last
ROUTE_CONFIG = {
    "priority": 100,
}


# ============================================================================
# STOREFRONT HOMEPAGE
# ============================================================================


@router.get("/", response_class=HTMLResponse, include_in_schema=False)
async def storefront_homepage(
    request: Request,
    db: Session = Depends(get_db),
):
    """
    Storefront homepage handler.

    Looks for a CMS page with slug="home" (store override → store default),
    and renders the appropriate landing template. Falls back to the default
    landing template when no CMS homepage exists.
    """
    store = getattr(request.state, "store", None)
    platform = getattr(request.state, "platform", None)
    store_id = store.id if store else None
    if not platform:
        raise HTTPException(status_code=400, detail="Platform context required")

    # Try to load a homepage from CMS (store override → store default)
    page = content_page_service.get_page_for_store(
        db,
        platform_id=platform.id,
        slug="home",
        store_id=store_id,
        include_unpublished=False,
    )

    # Resolve placeholders for store default pages (title + content)
    page_content = None
    page_title = None
    if page:
        page_content = page.content
        page_title = page.title
        if page.is_store_default and store:
            page_content = content_page_service.resolve_placeholders(
                page.content, store
            )
            page_title = content_page_service.resolve_placeholders(
                page.title, store
            )

    context = get_storefront_context(request, db=db, page=page)
    if page_content:
        context["page_content"] = page_content
    if page_title:
        context["page_title"] = page_title

    # Select template based on page.template field (or default)
    template_map = {
        "full": "cms/storefront/landing-full.html",
        "modern": "cms/storefront/landing-modern.html",
        "minimal": "cms/storefront/landing-minimal.html",
    }
    template_name = "cms/storefront/landing-default.html"
    if page and page.template:
        template_name = template_map.get(page.template, template_name)

    return templates.TemplateResponse(template_name, context)


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


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

    Handles dynamic content pages like:
    - /about, /faq, /contact, /shipping, /returns, /privacy, /terms, etc.

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

    This route MUST be defined last in the router to avoid conflicts with
    specific routes (like /products, /cart, /account, etc.)
    """
    logger.debug(
        "[CMS_STOREFRONT] generic_content_page REACHED",
        extra={
            "path": request.url.path,
            "slug": slug,
            "store": getattr(request.state, "store", "NOT SET"),
            "context": getattr(request.state, "context_type", "NOT SET"),
        },
    )

    store = getattr(request.state, "store", None)
    platform = getattr(request.state, "platform", None)
    store_id = store.id if store else None
    if not platform:
        raise HTTPException(status_code=400, detail="Platform context required")
    platform_id = platform.id

    # Load content page from database (store override -> store default)
    page = content_page_service.get_page_for_store(
        db,
        platform_id=platform_id,
        slug=slug,
        store_id=store_id,
        include_unpublished=False,
    )

    if not page:
        logger.warning(
            "[CMS_STOREFRONT] Content page not found",
            extra={
                "slug": slug,
                "store_id": store_id,
                "store_name": store.name if store else None,
            },
        )
        raise HTTPException(status_code=404, detail=f"Page not found: {slug}")

    logger.info(
        "[CMS_STOREFRONT] Content page found",
        extra={
            "slug": slug,
            "page_id": page.id,
            "page_title": page.title,
            "is_store_override": page.store_id is not None,
            "store_id": store_id,
        },
    )

    # Resolve placeholders in store default pages ({{store_name}}, etc.)
    page_content = page.content
    page_title = page.title
    if page.is_store_default and store:
        page_content = content_page_service.resolve_placeholders(page.content, store)
        page_title = content_page_service.resolve_placeholders(page.title, store)

    context = get_storefront_context(request, db=db, page=page)
    context["page_title"] = page_title
    context["page_content"] = page_content

    # Select template based on page.template field
    template_map = {
        "full": "cms/storefront/landing-full.html",
        "modern": "cms/storefront/landing-modern.html",
        "minimal": "cms/storefront/landing-minimal.html",
    }
    template_name = template_map.get(page.template, "cms/storefront/content-page.html")

    return templates.TemplateResponse(
        template_name,
        context,
    )


# ============================================================================
# DEBUG ENDPOINTS - For troubleshooting context issues
# ============================================================================


@router.get("/debug/context", response_class=HTMLResponse, include_in_schema=False)
async def debug_context(request: Request):
    """
    DEBUG ENDPOINT: Display request context.

    Shows what's available in request.state.
    Useful for troubleshooting template variable issues.

    URL: /storefront/debug/context
    """
    import json

    store = getattr(request.state, "store", None)
    theme = getattr(request.state, "theme", None)

    debug_info = {
        "path": request.url.path,
        "host": request.headers.get("host", ""),
        "store": {
            "found": store is not None,
            "id": store.id if store else None,
            "name": store.name if store else None,
            "subdomain": store.subdomain if store else None,
            "is_active": store.is_active if store else None,
        },
        "theme": {
            "found": theme is not None,
            "name": theme.get("theme_name") if theme else None,
        },
        "clean_path": getattr(request.state, "clean_path", "NOT SET"),
        "context_type": str(getattr(request.state, "context_type", "NOT SET")),
    }

    html_content = f"""
    <!DOCTYPE html>
    <html>
    <head>
        <title>Debug Context</title>
        <style>
            body {{ font-family: monospace; margin: 20px; }}
            pre {{ background: #f0f0f0; padding: 20px; border-radius: 5px; }}
            .good {{ color: green; }}
            .bad {{ color: red; }}
        </style>
    </head>
    <body>
        <h1>Request Context Debug</h1>
        <pre>{json.dumps(debug_info, indent=2)}</pre>

        <h2>Status</h2>
        <p class="{"good" if store else "bad"}">
            Store: {"Found" if store else "Not Found"}
        </p>
        <p class="{"good" if theme else "bad"}">
            Theme: {"Found" if theme else "Not Found"}
        </p>
        <p class="{"good" if str(getattr(request.state, "context_type", "NOT SET")) == "storefront" else "bad"}">
            Context Type: {str(getattr(request.state, "context_type", "NOT SET"))}
        </p>
    </body>
    </html>
    """
    return HTMLResponse(content=html_content)