package momenthandler

import (
	"strconv"

	"github.com/gin-gonic/gin"

	momentlogic "spark-server/internal/module/moment/logic"
	"spark-server/internal/pkg/errs"
	"spark-server/internal/pkg/reqctx"
	"spark-server/internal/transport/http/respond"
)

// Handler is the Moments HTTP controller.
type Handler struct {
	moments *momentlogic.Service
}

func New(moments *momentlogic.Service) *Handler {
	return &Handler{moments: moments}
}

func currentUID(c *gin.Context) (int64, bool) {
	rc := reqctx.From(c.Request.Context())
	if rc == nil || rc.UserID <= 0 {
		respond.JSONError(c, errs.ErrUnauthorized)
		return 0, false
	}
	return rc.UserID, true
}

func pathInt(c *gin.Context, name string) (int64, bool) {
	id, err := strconv.ParseInt(c.Param(name), 10, 64)
	if err != nil || id <= 0 {
		respond.JSONError(c, errs.ErrInvalidArgument)
		return 0, false
	}
	return id, true
}

func queryInt(c *gin.Context, name string) int64 {
	n, _ := strconv.ParseInt(c.Query(name), 10, 64)
	return n
}

func (h *Handler) Publish(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	var in momentlogic.PublishInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	out, err := h.moments.Publish(c.Request.Context(), uid, &in)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) Feed(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	out, err := h.moments.Feed(c.Request.Context(), uid, queryInt(c, "cursor"), int(queryInt(c, "limit")))
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) Album(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	owner, ok := pathInt(c, "uid")
	if !ok {
		return
	}
	out, err := h.moments.Album(c.Request.Context(), uid, owner, queryInt(c, "cursor"), int(queryInt(c, "limit")))
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) Get(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, ok := pathInt(c, "id")
	if !ok {
		return
	}
	out, err := h.moments.Get(c.Request.Context(), uid, id)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) Delete(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, ok := pathInt(c, "id")
	if !ok {
		return
	}
	if err := h.moments.Delete(c.Request.Context(), uid, id); err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, gin.H{})
}

func (h *Handler) Like(c *gin.Context) {
	h.mutatePost(c, func(uid, id int64) (*momentlogic.View, error) {
		return h.moments.Like(c.Request.Context(), uid, id)
	})
}

func (h *Handler) Unlike(c *gin.Context) {
	h.mutatePost(c, func(uid, id int64) (*momentlogic.View, error) {
		return h.moments.Unlike(c.Request.Context(), uid, id)
	})
}

func (h *Handler) mutatePost(c *gin.Context, fn func(uid, id int64) (*momentlogic.View, error)) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, ok := pathInt(c, "id")
	if !ok {
		return
	}
	out, err := fn(uid, id)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) CreateComment(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, ok := pathInt(c, "id")
	if !ok {
		return
	}
	var in momentlogic.CommentInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	out, err := h.moments.Comment(c.Request.Context(), uid, id, &in)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) DeleteComment(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, ok := pathInt(c, "id")
	if !ok {
		return
	}
	cid, ok := pathInt(c, "cid")
	if !ok {
		return
	}
	out, err := h.moments.DeleteComment(c.Request.Context(), uid, id, cid)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) ListNotices(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	out, err := h.moments.ListNotices(c.Request.Context(), uid, queryInt(c, "cursor"), int(queryInt(c, "limit")))
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) ReadNotices(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	var in momentlogic.NoticeReadInput
	if c.Request.ContentLength > 0 {
		if err := respond.BindJSON(c, &in); err != nil {
			respond.JSONError(c, err)
			return
		}
	}
	if err := h.moments.ReadNotices(c.Request.Context(), uid, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, gin.H{})
}

func (h *Handler) Unread(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	out, err := h.moments.UnreadFeed(c.Request.Context(), uid)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) Read(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	var in momentlogic.ReadInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	if err := h.moments.MarkFeedRead(c.Request.Context(), uid, in.PostID); err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, gin.H{})
}

func (h *Handler) GetSettings(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	out, err := h.moments.GetSettings(c.Request.Context(), uid)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) PatchSettings(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	var in momentlogic.PatchSettingsInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	out, err := h.moments.PatchSettings(c.Request.Context(), uid, &in)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) PutHide(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	peer, ok := pathInt(c, "uid")
	if !ok {
		return
	}
	var in momentlogic.HideInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	out, err := h.moments.PutHide(c.Request.Context(), uid, peer, &in)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) DeleteHide(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	peer, ok := pathInt(c, "uid")
	if !ok {
		return
	}
	out, err := h.moments.DeleteHide(c.Request.Context(), uid, peer)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}