package approval

import (
	"time"

	"server/models"

	"github.com/beego/beego/v2/client/orm"
)

// InstanceStatusOf 读取实例当前状态（单据提交后用于判断流程是否已直接结束）。
func InstanceStatusOf(instID uint64) int8 {
	var inst models.ApprovalInstance
	if err := models.Orm.QueryTable(new(models.ApprovalInstance)).
		Filter("id", instID).One(&inst, "status"); err != nil {
		return models.ApprovalInstanceRunning
	}
	return inst.Status
}

// InstanceBrief 单据详情页展示的审批进度摘要：当前节点、待办人、时间线。
func InstanceBrief(instID uint64) map[string]interface{} {
	if instID == 0 {
		return nil
	}
	var inst models.ApprovalInstance
	if err := models.Orm.QueryTable(new(models.ApprovalInstance)).
		Filter("id", instID).One(&inst); err != nil {
		return nil
	}
	tasks := make([]map[string]interface{}, 0)
	var rows []models.ApprovalTask
	_, _ = models.Orm.QueryTable(new(models.ApprovalTask)).
		Filter("instance_id", instID).OrderBy("sort", "id").All(&rows)
	for _, t := range rows {
		tasks = append(tasks, map[string]interface{}{
			"task_id": t.ID, "node_key": t.NodeKey, "node_name": t.NodeName,
			"approver_id": t.ApproverID, "approver_name": t.ApproverName,
			"status": t.Status, "status_label": approvalTaskLabel(t.Status),
			"comment": t.Comment, "action": t.Action,
			"create_time": t.CreateTime, "finish_time": t.FinishTime,
		})
	}
	return map[string]interface{}{
		"instance_id":  inst.ID,
		"flow_id":      inst.FlowID,
		"flow_name":    flowNameOf(inst.FlowID),
		"biz_type":     inst.BizType,
		"status":       inst.Status,
		"status_label": approvalInstanceLabel(inst.Status),
		"current_node": inst.CurrentNode,
		"submit_name":  inst.SubmitUserName,
		"submit_time":  inst.CreateTime,
		"finish_time":  inst.FinishTime,
		"tasks":        tasks,
	}
}

// flowNameOf 流程名称（流程被删除时回落为占位文案，不影响单据查看）
func flowNameOf(flowID uint64) string {
	if flowID == 0 {
		return ""
	}
	var f models.TenantApprovalFlow
	if err := models.Orm.QueryTable(new(models.TenantApprovalFlow)).
		Filter("id", flowID).One(&f, "flow_name"); err == nil {
		return f.FlowName
	}
	return "已删除的审批流"
}

func approvalTaskLabel(status int8) string {
	switch status {
	case models.ApprovalTaskApproved:
		return "已通过"
	case models.ApprovalTaskRejected:
		return "已驳回"
	case models.ApprovalTaskSkipped:
		return "已跳过"
	case models.ApprovalTaskNotified:
		return "已通知"
	default:
		return "待审批"
	}
}

func approvalInstanceLabel(status int8) string {
	switch status {
	case models.ApprovalInstanceApproved:
		return "已通过"
	case models.ApprovalInstanceRejected:
		return "已驳回"
	case models.ApprovalInstanceWithdrawn:
		return "已撤回"
	default:
		return "审批中"
	}
}

// CancelInstance 业务单据作废时同步终结在途实例，避免审批中心留下无效待办。
// 不做成「驳回」是因为驳回会让单据回到已驳回态；这里直接按撤回处理，
// 调用方已负责把业务单据置为终态。
func CancelInstance(instID uint64, reason string) {
	if instID == 0 {
		return
	}
	var inst models.ApprovalInstance
	if err := models.Orm.QueryTable(new(models.ApprovalInstance)).
		Filter("id", instID).One(&inst, "id", "status"); err != nil {
		return
	}
	if inst.Status != models.ApprovalInstanceRunning {
		return
	}
	now := time.Now()
	_, _ = models.Orm.QueryTable(new(models.ApprovalInstance)).Filter("id", instID).
		Update(orm.Params{"status": models.ApprovalInstanceWithdrawn, "finish_time": now, "update_time": now})
	_, _ = models.Orm.QueryTable(new(models.ApprovalTask)).
		Filter("instance_id", instID).Filter("status", models.ApprovalTaskPending).
		Update(orm.Params{"status": models.ApprovalTaskSkipped, "comment": reason, "update_time": now})
}