package story

import (
	"RenewCMS/api/pkg/access"
	"RenewCMS/api/pkg/apperr"
	"RenewCMS/api/pkg/articleerr"
	"RenewCMS/internal/infrastructure/useCases"
	"encoding/json"
	"log"
	"net/http"
	"strconv"

	"github.com/go-chi/chi/v5"
)

type Handler struct {
	MoveUseCase   *useCases.MoveStoryUseCase
	DeleteUseCase *useCases.DeleteStoryUseCase
}

func NewHandler(move *useCases.MoveStoryUseCase, delete *useCases.DeleteStoryUseCase) *Handler {
	return &Handler{MoveUseCase: move, DeleteUseCase: delete}
}

func parseStoryID(r *http.Request) (uint32, error) {
	id, err := strconv.ParseUint(chi.URLParam(r, "story_id"), 10, 32)
	return uint32(id), err
}

type moveRequest struct {
	Site *string `json:"site"`
}

type moveResponse struct {
	StoryID    uint32   `json:"story_id"`
	Site       string   `json:"site"`
	SiteID     uint32   `json:"site_id"`
	ArticleIDs []uint32 `json:"article_ids"`
}

func (h *Handler) Move(w http.ResponseWriter, r *http.Request) {
	id, err := parseStoryID(r)
	if err != nil {
		http.Error(w, apperr.IdUint32ErrorMessage, http.StatusBadRequest)
		return
	}
	var request moveRequest
	if err := json.NewDecoder(r.Body).Decode(&request); err != nil || request.Site == nil || *request.Site == "" {
		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
		return
	}
	result, err := h.MoveUseCase.MoveStory(r.Context(), useCases.MoveStoryCommand{StoryID: id, SiteKey: *request.Site, Caller: access.CallerOf(r)})
	if err != nil {
		writeError(w, err, apperr.MoveStoryFailedErrorMessage)
		return
	}
	body, err := json.Marshal(moveResponse{StoryID: result.StoryID, Site: result.Site.Key, SiteID: result.Site.ID, ArticleIDs: result.ArticleIDs})
	if err != nil {
		http.Error(w, "Failed to encode response", http.StatusInternalServerError)
		return
	}
	if _, err := w.Write(body); err != nil {
		log.Printf("Failed to write response: %v", err)
	}
}

func (h *Handler) Delete(w http.ResponseWriter, r *http.Request) {
	id, err := parseStoryID(r)
	if err != nil {
		http.Error(w, apperr.IdUint32ErrorMessage, http.StatusBadRequest)
		return
	}
	if err := h.DeleteUseCase.DeleteStory(r.Context(), useCases.DeleteStoryCommand{StoryID: id, Caller: access.CallerOf(r)}); err != nil {
		writeError(w, err, apperr.DeleteArticleFailedErrorMessage)
		return
	}
	w.WriteHeader(http.StatusNoContent)
}

func writeError(w http.ResponseWriter, err error, failure string) {
	if access.WriteIfMissingPermission(w, err) {
		return
	}
	if articleerr.Write(w, err) {
		return
	}
	http.Error(w, failure, http.StatusInternalServerError)
}