package recharge

import (
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/shopspring/decimal"
	"go.uber.org/zap"
	"gorm.io/gorm"

	"openteam/server/internal/pkg/httpx"
	"openteam/server/internal/store"
	"openteam/server/internal/user"
)

// Handler exposes the reserved recharge order endpoints.
type Handler struct {
	db  *gorm.DB
	log *zap.Logger
}

func NewHandler(db *gorm.DB, log *zap.Logger) *Handler {
	return &Handler{db: db, log: log}
}

type CreateInput struct {
	Amount decimal.Decimal `json:"amount" binding:"required"`
	Remark string          `json:"remark"`
}

// Create handles POST /api/v1/recharges — creates a pending manual order.
func (h *Handler) Create(c *gin.Context) {
	u := user.Current(c)
	var in CreateInput
	if !httpx.Bind(c, &in) {
		return
	}
	if in.Amount.LessThanOrEqual(decimal.Zero) {
		httpx.Fail(c, http.StatusBadRequest, "amount must be positive")
		return
	}
	order := &store.RechargeOrder{
		UserID: u.ID,
		Amount: in.Amount,
		Status: "pending",
		Method: "manual",
		Remark: in.Remark,
	}
	if err := h.db.Create(order).Error; err != nil {
		h.log.Warn("create recharge order failed", zap.Error(err))
		httpx.Fail(c, http.StatusInternalServerError, "create order failed")
		return
	}
	httpx.Created(c, orderDTO(order))
}

// List handles GET /api/v1/recharges.
func (h *Handler) List(c *gin.Context) {
	u := user.Current(c)
	var orders []store.RechargeOrder
	if err := h.db.Where("user_id = ?", u.ID).Order("id DESC").Find(&orders).Error; err != nil {
		h.log.Warn("list recharge orders failed", zap.Error(err))
		httpx.Fail(c, http.StatusInternalServerError, "list orders failed")
		return
	}
	out := make([]gin.H, 0, len(orders))
	for i := range orders {
		out = append(out, orderDTO(&orders[i]))
	}
	httpx.OK(c, out)
}

func orderDTO(o *store.RechargeOrder) gin.H {
	return gin.H{
		"id":          o.ID,
		"amount":      o.Amount.String(),
		"status":      o.Status,
		"method":      o.Method,
		"remark":      o.Remark,
		"reviewedBy":  o.ReviewedBy,
		"reviewedAt":  o.ReviewedAt,
		"createdAt":   o.CreatedAt,
	}
}