package server

import (
	"encoding/json"
	"net/http"

	"github.com/food-ai/backend/internal/domain/auth"
	"github.com/food-ai/backend/internal/domain/diary"
	"github.com/food-ai/backend/internal/domain/dish"
	"github.com/food-ai/backend/internal/domain/home"
	"github.com/food-ai/backend/internal/domain/language"
	"github.com/food-ai/backend/internal/domain/menu"
	"github.com/food-ai/backend/internal/infra/middleware"
	"github.com/food-ai/backend/internal/domain/product"
	"github.com/food-ai/backend/internal/domain/recipe"
	"github.com/food-ai/backend/internal/domain/recognition"
	"github.com/food-ai/backend/internal/domain/recommendation"
	"github.com/food-ai/backend/internal/domain/savedrecipe"
	"github.com/food-ai/backend/internal/domain/user"
	"github.com/food-ai/backend/internal/domain/userproduct"
	"github.com/go-chi/chi/v5"
	"github.com/jackc/pgx/v5/pgxpool"
)

func NewRouter(
	pool *pgxpool.Pool,
	authHandler *auth.Handler,
	userHandler *user.Handler,
	recommendationHandler *recommendation.Handler,
	savedRecipeHandler *savedrecipe.Handler,
	productHandler *product.Handler,
	userProductHandler *userproduct.Handler,
	recognitionHandler *recognition.Handler,
	menuHandler *menu.Handler,
	diaryHandler *diary.Handler,
	homeHandler *home.Handler,
	dishHandler *dish.Handler,
	recipeHandler *recipe.Handler,
	authMiddleware func(http.Handler) http.Handler,
	allowedOrigins []string,
	unitsListHandler http.HandlerFunc,
	cuisineListHandler http.HandlerFunc,
	tagListHandler http.HandlerFunc,
) *chi.Mux {
	r := chi.NewRouter()

	// Global middleware
	r.Use(middleware.RequestID)
	r.Use(middleware.Logging)
	r.Use(middleware.Recovery)
	r.Use(middleware.CORS(allowedOrigins))
	r.Use(middleware.Language)

	// Public
	r.Get("/health", healthCheck(pool))
	r.Get("/languages", language.List)
	r.Get("/units", unitsListHandler)
	r.Get("/cuisines", cuisineListHandler)
	r.Get("/tags", tagListHandler)
	r.Route("/auth", func(r chi.Router) {
		r.Post("/login", authHandler.Login)
		r.Post("/refresh", authHandler.Refresh)
		r.Post("/logout", authHandler.Logout)
	})

	// Protected
	r.Group(func(r chi.Router) {
		r.Use(authMiddleware)

		r.Get("/products/search", productHandler.Search)
		r.Get("/products/barcode/{barcode}", productHandler.GetByBarcode)

		r.Get("/profile", userHandler.Get)
		r.Put("/profile", userHandler.Update)

		r.Get("/recommendations", recommendationHandler.GetRecommendations)

		r.Route("/saved-recipes", func(r chi.Router) {
			r.Post("/", savedRecipeHandler.Save)
			r.Get("/", savedRecipeHandler.List)
			r.Get("/{id}", savedRecipeHandler.GetByID)
			r.Delete("/{id}", savedRecipeHandler.Delete)
		})

		r.Route("/user-products", func(r chi.Router) {
			r.Get("/", userProductHandler.List)
			r.Post("/", userProductHandler.Create)
			r.Post("/batch", userProductHandler.BatchCreate)
			r.Put("/{id}", userProductHandler.Update)
			r.Delete("/", userProductHandler.DeleteAll)
			r.Delete("/{id}", userProductHandler.Delete)
		})

		r.Route("/dishes", func(r chi.Router) {
			r.Get("/", dishHandler.List)
			r.Get("/search", dishHandler.Search)
			r.Get("/{id}", dishHandler.GetByID)
		})

		r.Get("/recipes/{id}", recipeHandler.GetByID)

		r.Route("/menu", func(r chi.Router) {
			r.Get("/", menuHandler.GetMenu)
			r.Put("/items/{id}", menuHandler.UpdateMenuItem)
			r.Delete("/items/{id}", menuHandler.DeleteMenuItem)
		})

		r.Route("/shopping-list", func(r chi.Router) {
			r.Get("/", menuHandler.GetShoppingList)
			r.Post("/generate", menuHandler.GenerateShoppingList)
			r.Patch("/items/{index}/check", menuHandler.ToggleShoppingItem)
		})

		r.Route("/diary", func(r chi.Router) {
			r.Get("/", diaryHandler.GetByDate)
			r.Get("/recent", diaryHandler.GetRecent)
			r.Post("/", diaryHandler.Create)
			r.Delete("/{id}", diaryHandler.Delete)
		})

		r.Get("/home/summary", homeHandler.GetSummary)

		r.Route("/ai", func(r chi.Router) {
			r.Post("/recognize-receipt", recognitionHandler.RecognizeReceipt)
			r.Post("/recognize-products", recognitionHandler.RecognizeProducts)
			r.Post("/recognize-dish", recognitionHandler.RecognizeDish)
			r.Get("/jobs", recognitionHandler.ListTodayJobs)
			r.Get("/jobs/history", recognitionHandler.ListAllJobs)
			r.Get("/jobs/{id}", recognitionHandler.GetJob)
			r.Get("/jobs/{id}/stream", recognitionHandler.GetJobStream)
			r.Get("/product-jobs", recognitionHandler.ListRecentProductJobs)
			r.Get("/product-jobs/history", recognitionHandler.ListAllProductJobs)
			r.Get("/product-jobs/{id}", recognitionHandler.GetProductJob)
			r.Get("/product-jobs/{id}/stream", recognitionHandler.GetProductJobStream)
			r.Post("/generate-menu", menuHandler.GenerateMenu)
		})
	})

	return r
}

func healthCheck(pool *pgxpool.Pool) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		dbStatus := "connected"
		if err := pool.Ping(r.Context()); err != nil {
			dbStatus = "disconnected"
		}

		w.Header().Set("Content-Type", "application/json")
		_ = json.NewEncoder(w).Encode(map[string]string{
			"status":  "ok",
			"version": "0.1.0",
			"db":      dbStatus,
		})
	}
}