package handler

import (
	"strconv"
	"strings"

	"affiliate_dash/internal/pkg/response"
	"affiliate_dash/internal/service"

	"github.com/gin-gonic/gin"
)

// DeliveryHandler 提供用户侧公开发货页面使用的接口。
type DeliveryHandler struct {
	deliverySvc *service.DeliveryService
}

func NewDeliveryHandler(deliverySvc *service.DeliveryService) *DeliveryHandler {
	return &DeliveryHandler{deliverySvc: deliverySvc}
}

func (h *DeliveryHandler) GetOrder(c *gin.Context) {
	order, err := h.deliverySvc.GetOrder(c.Param("order_no"), parseDeliveryAuth(c))
	if err != nil {
		writeDeliveryError(c, err)
		return
	}
	response.OK(c, order)
}

type deliveryBindReq struct {
	GameAccount string `json:"game_account" binding:"required"`
}

func (h *DeliveryHandler) Bind(c *gin.Context) {
	var req deliveryBindReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "请输入玩家编号")
		return
	}
	result, err := h.deliverySvc.Bind(c.Param("order_no"), req.GameAccount, parseDeliveryAuth(c))
	if err != nil {
		writeDeliveryError(c, err)
		return
	}
	response.OK(c, result)
}

type deliverySubmitReq struct {
	GameAccount string `json:"game_account" binding:"required"`
	BindUUID    string `json:"bind_uuid" binding:"required"`
}

func (h *DeliveryHandler) Submit(c *gin.Context) {
	var req deliverySubmitReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "玩家编号和绑定凭证不能为空")
		return
	}
	result, err := h.deliverySvc.Submit(c.Param("order_no"), req.GameAccount, req.BindUUID, parseDeliveryAuth(c))
	if err != nil {
		writeDeliveryError(c, err)
		return
	}
	response.OK(c, result)
}

func parseDeliveryAuth(c *gin.Context) service.DeliveryLinkAuth {
	exp := int64(0)
	if value := strings.TrimSpace(c.Query("exp")); value != "" {
		if parsed, err := strconv.ParseInt(value, 10, 64); err == nil {
			exp = parsed
		}
	}
	return service.DeliveryLinkAuth{
		Exp:  exp,
		Sign: strings.TrimSpace(c.Query("sign")),
	}
}

func writeDeliveryError(c *gin.Context, err error) {
	type statusCoder interface {
		HTTPStatus() int
	}
	if sc, ok := err.(statusCoder); ok {
		status := sc.HTTPStatus()
		response.Fail(c, status, status, strings.TrimSpace(err.Error()))
		return
	}
	msg := strings.TrimSpace(err.Error())
	if msg == "订单不存在" {
		response.NotFound(c, msg)
		return
	}
	if msg == "链接参数缺失" || msg == "发货链接未生成" || msg == "发货链接已失效" || msg == "发货链接已过期" || msg == "发货链接签名无效" {
		response.Forbidden(c, msg)
		return
	}
	response.BadRequest(c, msg)
}