package admin

import (
	"net/http"
	"server/internal/model/common"
	"server/internal/model/request"
	"server/internal/pkg/httputil"
	"server/internal/router"
	"server/internal/service/admin"

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

type PostHandler struct {
	postService *admin.PostService
}

var _ router.Registrar = (*PostHandler)(nil)

func NewPostHandler(postService *admin.PostService) *PostHandler {
	return &PostHandler{postService: postService}
}

func (h *PostHandler) Register(r chi.Router) {
	r.Route("/posts", func(r chi.Router) {
		r.Get("/", h.List)
		r.Get("/{id}", h.GetPostByID)
		r.Post("/", h.Create)
		r.Patch("/{id}", h.Update)
		r.Delete("/{id}", h.Delete)
	})
}

func (h *PostHandler) List(w http.ResponseWriter, r *http.Request) {
	pagination := httputil.Pagination(r)

	result, err := h.postService.List(r.Context(), pagination)
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	resp := common.PageResponse{
		Page:     pagination.Page,
		PageSize: pagination.PageSize,
		List:     result.List,
		Total:    result.Total,
	}

	httputil.OkWithPage(w, &resp)
}

func (h *PostHandler) GetPostByID(w http.ResponseWriter, r *http.Request) {
	id, err := httputil.URLParamInt32(r, "id")
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	post, err := h.postService.FindByID(r.Context(), id)
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w, post)
}

func (h *PostHandler) Create(w http.ResponseWriter, r *http.Request) {
	var req request.CreatePostRequest

	if err := httputil.BindJson(w, r, &req); err != nil {
		httputil.Fail(w, err)
		return
	}

	postID, err := h.postService.Create(r.Context(), req)

	if err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w, map[string]int32{
		"post_id": postID,
	})
}

func (h *PostHandler) Update(w http.ResponseWriter, r *http.Request) {
	id, err := httputil.URLParamInt32(r, "id")
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	var req request.UpdatePostRequest

	if err = httputil.BindJson(w, r, &req); err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = h.postService.Update(r.Context(), id, req); err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w)
}

func (h *PostHandler) Delete(w http.ResponseWriter, r *http.Request) {
	id, err := httputil.URLParamInt32(r, "id")
	if err != nil {
		httputil.Fail(w, err)
		return
	}

	if err = h.postService.Delete(r.Context(), id); err != nil {
		httputil.Fail(w, err)
		return
	}

	httputil.Ok(w)
}