package router

import (
	"bookhoard/internal/database"
	"bookhoard/internal/handlers"
	"bookhoard/templates"
	"bytes"
	"log"
	"net/http"

	"github.com/labstack/echo/v5"
)

func registerSearchRoutes(cfg *Config) {
	e := cfg.Echo
	// JWT middleware for protected routes
	jwtMiddleware := createJWTMiddleware(cfg)
	protected := e.Group("/api", jwtMiddleware)
	// Search endpoint - returns JSON or HTML based on HX-Request header
	protected.GET("/media-items/search", func(c *echo.Context) error {
		// Check if HTMX request (expects HTML)
		if c.Request().Header.Get("HX-Request") == "true" {
			return handleSearchHTML(c, cfg)
		}

		// Otherwise return JSON (API clients)
		return cfg.MediaHandler.SearchMediaItems(c)
	})
	// Facet-value listings for the filter panel (faceted-navigation
	// Batch C): /api/media-items/facets?facet=X&library_id=...
	protected.GET("/media-items/facets", cfg.MediaHandler.GetFacets)
	// Rule-builder live count (faceted plan Phase 9): the composed
	// tree's true match count (COUNT(*)), rules + library scope.
	protected.GET("/media-items/filter-count", cfg.MediaHandler.FilterCount)
	protected.POST("/sync/books/query", cfg.MatchingHandler.QueryBooks)
}

// handleSearchHTML renders HTML response for HTMX requests
func handleSearchHTML(c *echo.Context, cfg *Config) error {
	user, ok := c.Get("user").(database.Users)
	if !ok {
		return c.String(http.StatusUnauthorized, "Unauthorized")
	}
	// Extract filters via the SHARED parser (handlers.ParseMediaSearchParams)
	// — the HTMX grid partial and the JSON endpoint can never disagree on
	// which facet params exist or how they parse. (This branch previously
	// dropped publisher_filter and narrator_filter entirely — the shared
	// parser fixes that too.)
	params := handlers.ParseMediaSearchParams(c)
	params.UserID = user.ID

	// Filter rule builder: a malformed qf is a 400, never a silently
	// ignored token.
	if params.FilterParseErr != "" {
		return c.HTML(http.StatusBadRequest, `<div style="color: red;">Invalid filter</div>`)
	}
	limit := params.Limit
	offset := params.Offset
	libraryID := c.QueryParam("library_id")

	// Family-lens gate: an explicit library_id outside the requester's
	// visible set is a 403 (same rule as the JSON branch).
	if params.LibraryID.Valid {
		_, ids, err := cfg.LibraryService.VisibleLibrarySet(c.Request().Context(), user.ID)
		if err != nil {
			log.Printf("VisibleLibrarySet failed: %v", err)
			return c.HTML(http.StatusInternalServerError, `<div style="color: red;">Search error</div>`)
		}
		visible := false
		for _, id := range ids {
			if id == params.LibraryID {
				visible = true
				break
			}
		}
		if !visible {
			return c.HTML(http.StatusForbidden, `<div style="color: red;">Library not visible</div>`)
		}
	}

	// Execute search using handler method
	results, totalCount, err := cfg.MediaHandler.ExecuteSearch(c.Request().Context(), params)
	if err != nil {
		log.Printf("Search error: %v", err)
		return c.HTML(http.StatusInternalServerError, `<div style="color: red;">Search error</div>`)
	}
	// Convert to BookInfo
	bookInfoList := handlers.BookCardsFromUnified(results)
	// Stamp active conflict flags so cards route the play action correctly
	bookInfoList = handlers.MarkActiveConflicts(c.Request().Context(), cfg.Queries, user.ID, bookInfoList)
	// Render using BooksGrid template (or BookPickerGrid for collection picker)
	var buf bytes.Buffer
	if c.QueryParam("show_checkbox") == "true" {
		err = templates.BookPickerGrid(bookInfoList).Render(c.Request().Context(), &buf)
	} else {
		err = templates.BooksGrid(bookInfoList, limit, offset, totalCount, libraryID).Render(c.Request().Context(), &buf)
	}
	if err != nil {
		log.Printf("Template render error: %v", err)
		return c.HTML(http.StatusInternalServerError, `<div style="color: red;">Render error</div>`)
	}
	return c.HTML(http.StatusOK, buf.String())
}