package order

import (
	"context"
	"errors"
	"io"

	"hfb_sys/backend/internal/middleware"
	"hfb_sys/backend/pkg/response"

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

func (h *Handler) AdminList(c *gin.Context) {
	query := parseAdminOrderQuery(c)
	result, err := h.service.ListAdmin(c.Request.Context(), query)
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, result)
}

func (h *Handler) AdminDetail(c *gin.Context) {
	id, ok := parseID(c)
	if !ok {
		return
	}
	item, err := h.service.FindAdmin(c.Request.Context(), id)
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, item)
}

func (h *Handler) AdminLatestByListing(c *gin.Context) {
	id, ok := parseID(c)
	if !ok {
		return
	}
	item, err := h.service.FindLatestAdminByListing(c.Request.Context(), id)
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, item)
}

func (h *Handler) AdminHandoffRecords(c *gin.Context) {
	id, ok := parseID(c)
	if !ok {
		return
	}
	items, err := h.service.HandoffRecordsAdmin(c.Request.Context(), id)
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, gin.H{"items": items})
}

func (h *Handler) AdminClose(c *gin.Context) {
	h.adminAction(c, h.service.AdminClose, gin.H{"closed": true})
}

func (h *Handler) AdminSeal(c *gin.Context) {
	h.adminAction(c, h.service.AdminSeal, gin.H{"sealed": true})
}

func (h *Handler) AdminMarkAbnormal(c *gin.Context) {
	h.adminAction(c, h.service.AdminMarkAbnormal, gin.H{"abnormal": true})
}

func (h *Handler) AdminResetHandoff(c *gin.Context) {
	h.adminAction(c, h.service.AdminResetHandoff, gin.H{"reset": true})
}

func (h *Handler) AdminPlatformHandoff(c *gin.Context) {
	adminID, ok := currentAdminID(c)
	if !ok {
		response.Unauthorized(c, "缺少管理员上下文")
		return
	}
	id, ok := parseID(c)
	if !ok {
		return
	}
	var req PlatformHandoffRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "交接说明和操作原因不能为空")
		return
	}
	record, err := h.service.AdminPlatformHandoff(c.Request.Context(), adminID, id, req, auditMeta(c))
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.Created(c, record)
}

func (h *Handler) AdminForceHandoff(c *gin.Context) {
	adminID, ok := currentAdminID(c)
	if !ok {
		response.Unauthorized(c, "缺少管理员上下文")
		return
	}
	id, ok := parseID(c)
	if !ok {
		return
	}
	var req ForceHandoffRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "操作原因不能为空")
		return
	}
	if err := h.service.AdminForceHandoff(c.Request.Context(), adminID, id, req, auditMeta(c)); err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, gin.H{"received": true})
}

func (h *Handler) AdminPlatformCheckoutConfirm(c *gin.Context) {
	h.adminAction(c, h.service.AdminPlatformCheckoutConfirm, gin.H{"confirmed": true})
}

func (h *Handler) AdminPlatformCheckoutCounter(c *gin.Context) {
	adminID, ok := currentAdminID(c)
	if !ok {
		response.Unauthorized(c, "缺少管理员上下文")
		return
	}
	id, ok := parseID(c)
	if !ok {
		return
	}
	var req CounterCheckoutRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "结账修正原因不能为空")
		return
	}
	checkout, err := h.service.AdminPlatformCheckoutCounter(c.Request.Context(), adminID, id, req, auditMeta(c))
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, checkout)
}

func (h *Handler) AdminPlatformCheckoutDispute(c *gin.Context) {
	h.adminAction(c, h.service.AdminPlatformCheckoutDispute, gin.H{"disputed": true})
}

func (h *Handler) AdminMarkOfflineSettlement(c *gin.Context) {
	adminID, ok := currentAdminID(c)
	if !ok {
		response.Unauthorized(c, "缺少管理员上下文")
		return
	}
	id, ok := parseID(c)
	if !ok {
		return
	}
	var req OfflineSettlementRequest
	if err := c.ShouldBindJSON(&req); err != nil && !errors.Is(err, io.EOF) {
		response.BadRequest(c, "线下结算备注格式不正确")
		return
	}
	if err := h.service.AdminMarkOfflineSettlement(c.Request.Context(), adminID, id, req, auditMeta(c)); err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, gin.H{"settled": true})
}

func (h *Handler) AdminHoldDeposit(c *gin.Context) {
	h.adminAction(c, h.service.AdminHoldDeposit, gin.H{"held": true})
}

func (h *Handler) AdminReleaseDeposit(c *gin.Context) {
	h.adminAction(c, h.service.AdminReleaseDeposit, gin.H{"released": true})
}

func (h *Handler) AdminRefund(c *gin.Context) {
	orderID, ok := parseID(c)
	if !ok {
		return
	}
	item, err := h.service.AdminRefund(c.Request.Context(), orderID)
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, item)
}

func (h *Handler) AdminRefundStatus(c *gin.Context) {
	orderID, ok := parseID(c)
	if !ok {
		return
	}
	item, err := h.service.AdminRefundStatus(c.Request.Context(), orderID)
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, item)
}

func (h *Handler) AdminApproveRefund(c *gin.Context) {
	orderID, ok := parseID(c)
	if !ok {
		return
	}
	if err := h.service.AdminApproveRefund(c.Request.Context(), orderID); err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, gin.H{"approved": true})
}

func (h *Handler) AdminRejectRefund(c *gin.Context) {
	orderID, ok := parseID(c)
	if !ok {
		return
	}
	var req struct {
		Action string `json:"action" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "请指定驳回操作类型")
		return
	}
	if err := h.service.AdminRejectRefund(c.Request.Context(), orderID, req.Action); err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, gin.H{"rejected": true})
}

func (h *Handler) ListPendingRefund(c *gin.Context) {
	items, err := h.service.ListPendingRefund(c.Request.Context())
	if err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, gin.H{"items": items})
}

func (h *Handler) adminAction(c *gin.Context, fn func(context.Context, uint64, uint64, AdminActionRequest, AuditMeta) error, okData gin.H) {
	adminID, ok := currentAdminID(c)
	if !ok {
		response.Unauthorized(c, "缺少管理员上下文")
		return
	}
	id, ok := parseID(c)
	if !ok {
		return
	}
	var req AdminActionRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "操作原因不能为空")
		return
	}
	if err := fn(c.Request.Context(), adminID, id, req, auditMeta(c)); err != nil {
		writeOrderError(c, err)
		return
	}
	response.OK(c, okData)
}

func auditMeta(c *gin.Context) AuditMeta {
	return AuditMeta{
		IP:        c.ClientIP(),
		UserAgent: c.GetHeader("User-Agent"),
		RequestID: middleware.GetRequestID(c),
	}
}