package handlers

import (
	"encoding/json"
	"fmt"
	"maot-shortner/internal/database"
	"maot-shortner/internal/services"
	"net/http"
)

type Response struct {
	Message string `json:"message"`
}

type LinkHandler struct {
	db          *database.Database
	linkService *services.LinkService
}

func (h *LinkHandler) Handle(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)

	json.NewEncoder(w).Encode(&Response{Message: "Ola"})
}

func NewLinkHandler(db *database.Database) *LinkHandler {
	return &LinkHandler{
		db:          db,
		linkService: services.NewLinkService(db),
	}
}

func (h *LinkHandler) ListLinks(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)

	linkList, err := h.linkService.GetLinks(r.Context())
	if err != nil {
		http.Error(w, fmt.Sprintf("Failed to list links: %v", err), http.StatusInternalServerError)
		return
	}

	json.NewEncoder(w).Encode(linkList)
}

func (h *LinkHandler) CreateLink(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)

	var linkRequest struct {
		URL          string  `json:"url"`
		RedirectCode *string `json:"redirect_code,omitempty"`
	}

	if err := json.NewDecoder(r.Body).Decode(&linkRequest); err != nil {
		http.Error(w, fmt.Sprintf("Failed to decode request body: %v", err), http.StatusBadRequest)
		return
	}

	link, err := h.linkService.CreateLink(r.Context(), linkRequest.URL, linkRequest.RedirectCode)
	if err != nil {
		http.Error(w, fmt.Sprintf("Failed to create link: %v", err), http.StatusInternalServerError)
		return
	}

	json.NewEncoder(w).Encode(link)
}

func (h *LinkHandler) GetUrl(w http.ResponseWriter, r *http.Request) {
	currentCode := r.PathValue("id")

	link, err := h.linkService.GetLink(r.Context(), currentCode)
	if err != nil {
		http.Error(w, fmt.Sprintf("Failed to get link: %v", err), http.StatusInternalServerError)
		return
	}

	http.Redirect(w, r, link.LongURL, http.StatusFound)
}