package grouphandler

import (
	"strconv"

	"github.com/gin-gonic/gin"

	grouplogic "spark-server/internal/module/group/logic"
	"spark-server/internal/pkg/errs"
	"spark-server/internal/transport/http/respond"
)

func (h *Handler) ListMembers(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, err := pathID(c)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	limit, _ := strconv.Atoi(c.Query("limit"))
	out, err := h.groups.ListMembers(c.Request.Context(), uid, id, limit)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) Invite(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, err := pathID(c)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	var in grouplogic.InviteInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	out, err := h.groups.Invite(c.Request.Context(), uid, id, &in)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) RemoveMember(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, err := pathID(c)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	target, err := pathUID(c)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	if err := h.groups.RemoveMember(c.Request.Context(), uid, id, target); err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, gin.H{})
}

func (h *Handler) UpdateMember(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, err := pathID(c)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	target, err := pathUID(c)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	var in grouplogic.UpdateMemberInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	out, err := h.groups.UpdateMember(c.Request.Context(), uid, id, target, &in)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) Transfer(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, err := pathID(c)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	var in grouplogic.TransferInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	out, err := h.groups.Transfer(c.Request.Context(), uid, id, &in)
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func pathUID(c *gin.Context) (int64, error) {
	id, err := strconv.ParseInt(c.Param("uid"), 10, 64)
	if err != nil || id <= 0 {
		return 0, errs.ErrInvalidArgument
	}
	return id, nil
}