package api

import (
	"context"
	"os"

	"github.com/gin-gonic/gin"
	"go.uber.org/zap"

	"veza-backend-api/internal/handlers"
	"veza-backend-api/internal/services"

	elasticsearch "veza-backend-api/internal/elasticsearch"
)

// setupSearchRoutes configure la route de recherche unifiée GET /search et autocomplete (v0.10.2 F363-F365)
// Uses Elasticsearch when ELASTICSEARCH_URL is set, else falls back to PostgreSQL
func (r *APIRouter) setupSearchRoutes(router *gin.RouterGroup) {
	esCfg := elasticsearch.LoadConfig()
	var searchSvc handlers.SearchServiceInterface
	if esCfg.Enabled {
		esClient, err := elasticsearch.NewClient(esCfg, r.logger)
		if err != nil {
			r.logger.Warn("Elasticsearch unavailable, falling back to PostgreSQL search", zap.Error(err))
			searchSvc = services.NewSearchService(r.db, r.logger)
		} else {
			// Optional: run reindex at startup if ELASTICSEARCH_AUTO_INDEX
			if os.Getenv("ELASTICSEARCH_AUTO_INDEX") == "true" {
				idx := elasticsearch.NewIndexer(esClient, r.db.GormDB, r.logger)
				if err := idx.ReindexAll(context.Background()); err != nil {
					r.logger.Warn("Elasticsearch auto-reindex failed", zap.Error(err))
				}
			}
			searchSvc = elasticsearch.NewSearchService(esClient, r.logger)
		}
	} else {
		searchSvc = services.NewSearchService(r.db, r.logger)
	}
	handlers.NewSearchHandlersWithInterface(searchSvc)
	router.GET("/search", handlers.SearchHandlersInstance.Search)
	router.GET("/search/suggestions", handlers.SearchHandlersInstance.Suggestions)
}