package approve_former

import "strings"

const flowTemplate = `apiVersion: argoproj.io/v1alpha1
kind: WorkflowTemplate
metadata:
  name: [[ .name ]]
spec:
  entrypoint: approve-flow
  arguments:
    parameters:
      - name: object
        value: {}

  templates:
    - name: approve-flow
      inputs:
        parameters:
          - name: object
      dag:
        tasks:
          [[- if .childNodesContentLines ]]
          [[- range .childNodesContentLines ]]
          [[ . ]]
          [[- end ]]
          [[- else ]]
          - name: node
            template: approval
          [[- end ]]
          
    - name: approval
      suspend: {}
      inputs:
        parameters:
          - name: approve
            default: '通过'
            enum:
              - '通过'
              - '拒绝'
              - '忽略'
      outputs:
        parameters:
          - name: approve
            valueFrom:
              supplied: {}`

type Flow struct {
	name       string
	childNodes []Node
}

func NewFlow(name string, childNodes ...Node) *Flow {
	return &Flow{
		name:       name,
		childNodes: childNodes,
	}
}

func (flow *Flow) GetDepends() string {
	return ""
}

func (flow *Flow) GetWhen() string {
	return ""
}

func (flow *Flow) AddNodes(childNodes ...Node) *Flow {
	if childNodes == nil || len(childNodes) == 0 {
		flow.childNodes = append(flow.childNodes, childNodes...)
	}

	return flow
}

func (flow *Flow) Render(_ Node) (string, error) {
	childNodesContents := make([]string, 0)
	for i, childNode := range flow.childNodes {
		var childNodeContent string

		if i == 0 {
			content, err := childNode.Render(nil)
			if err != nil {
				return "", err
			}

			childNodeContent = content
		} else {
			content, err := childNode.Render(flow.childNodes[i-1])
			if err != nil {
				return "", err
			}

			childNodeContent = content
		}

		childNodesContents = append(childNodesContents, strings.Split(childNodeContent, "\n")...)
	}

	return render("flow", flowTemplate, map[string]any{
		"name":                   flow.name,
		"childNodesContentLines": childNodesContents,
	})
}