package approve_former

import (
	"bytes"
	"github.com/pkg/errors"
	"text/template"
)

const workflowTemplateTpl = `
[[- $workflowTemplateName := .real_workflow_name -]]
[[- $rootChildren := .children -]]

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

  templates:
    - name: approve-flow
      inputs:
        parameters:
          - name: object
      dag:
        tasks:
          [[ template "template" $rootChildren ]]
    - name: approval
      suspend: {}
      inputs:
        parameters:
          - name: approve
            default: '通过'
            enum:
              - '通过'
              - '拒绝'
              - '忽略'
      outputs:
        parameters:
          - name: approve
            valueFrom:
              supplied: {}

[[- define "template" -]]
- name: node
  template: approval
[[- end -]]
`

func ParseWorkflowTemplate(name string, templateParams map[string]any) (string, error) {
	tpl := template.New(name)
	tpl.Delims("[[", "]]")

	tpl, err := tpl.Parse(workflowTemplateTpl)
	if err != nil {
		return "", errors.New(err.Error())
	}

	templateParams["real_workflow_name"] = name

	buffer := &bytes.Buffer{}
	err = tpl.Execute(buffer, templateParams)
	if err != nil {
		return "", errors.New(err.Error())
	}

	return buffer.String(), nil
}