package admin

import (
	"strconv"
	"time"

	"github.com/go-playground/validator/v10"
	"github.com/gofiber/fiber/v2"
	"go.uber.org/zap"

	"github.com/break/junhong_cmp_fiber/internal/model"
	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	rechargeOrderSvc "github.com/break/junhong_cmp_fiber/internal/service/recharge_order"
	"github.com/break/junhong_cmp_fiber/internal/store/postgres"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/response"
)

// AdminRechargeOrderHandler 后台充值订单 Handler
type AdminRechargeOrderHandler struct {
	service   *rechargeOrderSvc.Service
	validator *validator.Validate
	logger    *zap.Logger
}

// NewAdminRechargeOrderHandler 创建后台充值订单 Handler
func NewAdminRechargeOrderHandler(service *rechargeOrderSvc.Service, validator *validator.Validate, logger *zap.Logger) *AdminRechargeOrderHandler {
	return &AdminRechargeOrderHandler{service: service, validator: validator, logger: logger}
}

// List 后台充值订单列表
// GET /api/admin/recharge-orders
func (h *AdminRechargeOrderHandler) List(c *fiber.Ctx) error {
	var req dto.AdminRechargeOrderListRequest
	if err := c.QueryParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}

	if req.Page < 1 {
		req.Page = 1
	}
	if req.PageSize < 1 {
		req.PageSize = constants.DefaultPageSize
	}
	if req.PageSize > constants.MaxPageSize {
		req.PageSize = constants.MaxPageSize
	}

	params := &postgres.ListRechargeOrderParams{
		Page:     req.Page,
		PageSize: req.PageSize,
		Status:   req.Status,
	}
	if req.ResourceType != "" && req.ResourceID != nil {
		params.ResourceType = &req.ResourceType
		params.ResourceID = req.ResourceID
	}
	if req.StartTime != "" {
		t, err := time.Parse(time.RFC3339, req.StartTime)
		if err == nil {
			params.StartTime = t
		}
	}
	if req.EndTime != "" {
		t, err := time.Parse(time.RFC3339, req.EndTime)
		if err == nil {
			params.EndTime = t
		}
	}

	orders, total, err := h.service.AdminList(c.UserContext(), params)
	if err != nil {
		return err
	}

	items := make([]dto.AdminRechargeOrderListItem, 0, len(orders))
	for _, order := range orders {
		if order == nil {
			continue
		}
		items = append(items, dto.AdminRechargeOrderListItem{
			ID:                 order.ID,
			RechargeOrderNo:    order.RechargeOrderNo,
			UserID:             order.UserID,
			ResourceType:       order.ResourceType,
			ResourceID:         order.ResourceID,
			Amount:             order.Amount,
			Status:             order.Status,
			StatusName:         getAdminRechargeOrderStatusName(order.Status),
			AutoPurchaseStatus: order.AutoPurchaseStatus,
			RejectionReason:    order.RejectionReason,
			CreatedAt:          order.CreatedAt.Format(time.RFC3339),
		})
	}

	return response.SuccessWithPagination(c, items, total, req.Page, req.PageSize)
}

// Get 后台充值订单详情
// GET /api/admin/recharge-orders/:id
func (h *AdminRechargeOrderHandler) Get(c *fiber.Ctx) error {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的订单 ID")
	}

	order, payments, err := h.service.AdminGet(c.UserContext(), uint(id))
	if err != nil {
		return err
	}

	var paymentDetails []dto.AdminRechargeOrderPaymentDetail
	for _, p := range payments {
		if p == nil {
			continue
		}
		paymentDetails = append(paymentDetails, dto.AdminRechargeOrderPaymentDetail{
			PaymentID:         p.ID,
			PaymentNo:         p.PaymentNo,
			PaymentMethod:     p.PaymentMethod,
			Amount:            p.Amount,
			Status:            p.Status,
			StatusName:        getAdminPaymentStatusName(p.Status),
			ThirdPartyTradeNo: p.ThirdPartyTradeNo,
			PaidAt:            formatAdminTimePtr(p.PaidAt),
			CreatedAt:         p.CreatedAt.Format(time.RFC3339),
		})
	}

	detail := &dto.AdminRechargeOrderDetail{
		ID:                 order.ID,
		RechargeOrderNo:    order.RechargeOrderNo,
		UserID:             order.UserID,
		AssetWalletID:      order.AssetWalletID,
		ResourceType:       order.ResourceType,
		ResourceID:         order.ResourceID,
		Amount:             order.Amount,
		Status:             order.Status,
		StatusName:         getAdminRechargeOrderStatusName(order.Status),
		AutoPurchaseStatus: order.AutoPurchaseStatus,
		LinkedPackageIDs:   order.LinkedPackageIDs,
		RejectionReason:    order.RejectionReason,
		CreatedAt:          order.CreatedAt.Format(time.RFC3339),
		PaidAt:             formatAdminTimePtr(order.PaidAt),
		Payments:           paymentDetails,
	}

	return response.Success(c, detail)
}

// Reject 驳回充值订单
// POST /api/admin/recharge-orders/:id/reject
func (h *AdminRechargeOrderHandler) Reject(c *fiber.Ctx) error {
	id, err := strconv.ParseUint(c.Params("id"), 10, 64)
	if err != nil {
		return errors.New(errors.CodeInvalidParam, "无效的订单 ID")
	}

	var req dto.AdminRechargeOrderRejectRequest
	if err := c.BodyParser(&req); err != nil {
		return errors.New(errors.CodeInvalidParam, "请求参数解析失败")
	}
	if err := h.validator.Struct(&req); err != nil {
		return errors.New(errors.CodeInvalidParam)
	}

	if err := h.service.Reject(c.UserContext(), uint(id), req.RejectionReason); err != nil {
		return err
	}

	return response.Success(c, nil)
}

func getAdminRechargeOrderStatusName(status int) string {
	switch status {
	case model.RechargeOrderStatusPending:
		return "待支付"
	case model.RechargeOrderStatusPaid:
		return "已支付"
	case model.RechargeOrderStatusClosed:
		return "已关闭"
	case model.RechargeOrderStatusRefunded:
		return "已退款"
	case model.RechargeOrderStatusRejected:
		return "已驳回"
	default:
		return "未知"
	}
}

func getAdminPaymentStatusName(status int) string {
	switch status {
	case model.PaymentRecordStatusPending:
		return "待支付"
	case model.PaymentRecordStatusPaid:
		return "已支付"
	case model.PaymentRecordStatusFailed:
		return "已失败"
	case model.PaymentRecordStatusRefunded:
		return "已退款"
	default:
		return "未知"
	}
}

func formatAdminTimePtr(t *time.Time) string {
	if t == nil {
		return ""
	}
	return t.Format(time.RFC3339)
}