package handler

import (
	"strconv"

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

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

func (h *MerchantHandler) GetWallet(c *gin.Context) {
	wallet, err := h.fulfillmentSvc.GetWallet(middleware.GetMerchantID(c))
	if err != nil {
		response.ServerError(c, err.Error())
		return
	}
	response.OK(c, wallet)
}

func (h *MerchantHandler) ListWalletLedger(c *gin.Context) {
	page, size := pageParams(c)
	referenceNo := c.Query("reference_no")
	entryType := c.Query("type")
	list, total, err := h.fulfillmentSvc.ListWalletLedger(middleware.GetMerchantID(c), page, size, referenceNo, entryType)
	if err != nil {
		response.ServerError(c, err.Error())
		return
	}
	response.Page(c, list, total, page, size)
}

// AdminGetWallet 供平台管理员查看指定商户的钱包。
func (h *MerchantHandler) AdminGetWallet(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	if id == 0 {
		response.BadRequest(c, "商户 ID 无效")
		return
	}
	wallet, err := h.fulfillmentSvc.GetWallet(uint(id))
	if err != nil {
		response.ServerError(c, err.Error())
		return
	}
	response.OK(c, wallet)
}

// AdminListWalletLedger 供平台管理员查看指定商户的积分流水。
func (h *MerchantHandler) AdminListWalletLedger(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	if id == 0 {
		response.BadRequest(c, "商户 ID 无效")
		return
	}
	page, size := pageParams(c)
	list, total, err := h.fulfillmentSvc.ListWalletLedger(uint(id), page, size, c.Query("reference_no"), c.Query("type"))
	if err != nil {
		response.ServerError(c, err.Error())
		return
	}
	response.Page(c, list, total, page, size)
}

type walletAdjustReq struct {
	Amount         int64  `json:"amount" binding:"required"`
	IdempotencyKey string `json:"idempotency_key" binding:"required"`
	Note           string `json:"note"`
}

// AdminAdjustWallet 供平台管理员手动调整指定商户的积分，商户侧无任何调账入口。
func (h *MerchantHandler) AdminAdjustWallet(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	if id == 0 {
		response.BadRequest(c, "商户 ID 无效")
		return
	}
	var req walletAdjustReq
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "参数错误：amount 与 idempotency_key 必填")
		return
	}
	wallet, err := h.fulfillmentSvc.AdjustWallet(service.WalletAdjustInput{
		MerchantID:     uint(id),
		ActorUserID:    middleware.GetUserID(c),
		Amount:         req.Amount,
		IdempotencyKey: req.IdempotencyKey,
		Note:           req.Note,
	})
	if err != nil {
		response.BadRequest(c, err.Error())
		return
	}
	h.rechargeSvc.CheckLowBalanceAndNotify(uint(id))
	response.OK(c, wallet)
}