package squarehandler

import (
	"strconv"

	"github.com/gin-gonic/gin"

	"spark-server/internal/module/square/entity"
	squarelogic "spark-server/internal/module/square/logic"
	"spark-server/internal/pkg/errs"
	"spark-server/internal/pkg/reqctx"
	"spark-server/internal/transport/http/respond"
)

// Handler is the square HTTP controller for one plaza channel.
type Handler struct {
	square  *squarelogic.Service
	channel entity.Channel
}

func New(square *squarelogic.Service, channel entity.Channel) *Handler {
	if channel == "" {
		channel = entity.ChannelSquare
	}
	return &Handler{square: square, channel: channel}
}

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 queryFloat(c *gin.Context, name string) float64 {
	n, _ := strconv.ParseFloat(c.Query(name), 64)
	return n
}

func (h *Handler) Categories(c *gin.Context) {
	respond.JSON(c, gin.H{"items": h.square.Categories()})
}

func (h *Handler) Feed(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	cat, ok := entity.ParseCategory(c.Query("category"))
	if !ok {
		respond.JSONError(c, errs.ErrInvalidArgument)
		return
	}
	if cat == "" {
		cat = entity.CategoryRecommend
	}
	out, err := h.square.Feed(c.Request.Context(), uid, h.channel, squarelogic.FeedQuery{
		Cursor: queryInt(c, "cursor"), Limit: int(queryInt(c, "limit")),
		Category: cat, Lat: queryFloat(c, "lat"), Lng: queryFloat(c, "lng"),
	})
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

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

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

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

func (h *Handler) Unlike(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	id, ok := pathInt(c, "id")
	if !ok {
		return
	}
	out, err := h.square.Unlike(c.Request.Context(), uid, id, h.channel)
	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 squarelogic.CommentInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	out, err := h.square.Comment(c.Request.Context(), uid, id, h.channel, &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
	}
	postID, ok := pathInt(c, "id")
	if !ok {
		return
	}
	cid, ok := pathInt(c, "cid")
	if !ok {
		return
	}
	out, err := h.square.DeleteComment(c.Request.Context(), uid, postID, cid, h.channel)
	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.square.ListNotices(c.Request.Context(), uid, h.channel, queryInt(c, "cursor"), int(queryInt(c, "limit")))
	if err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, out)
}

func (h *Handler) NoticeUnread(c *gin.Context) {
	uid, ok := currentUID(c)
	if !ok {
		return
	}
	out, err := h.square.NoticeUnread(c.Request.Context(), uid, h.channel)
	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 squarelogic.NoticeReadInput
	if err := respond.BindJSON(c, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	if err := h.square.ReadNotices(c.Request.Context(), uid, h.channel, &in); err != nil {
		respond.JSONError(c, err)
		return
	}
	respond.JSON(c, gin.H{})
}