package state

import (
	"fmt"
	"github.com/roboll/helmfile/tmpl"
	"gopkg.in/yaml.v2"
)

func (r ReleaseSpec) ExecuteTemplateExpressions(renderer *tmpl.FileRenderer) (*ReleaseSpec, error) {
	var result *ReleaseSpec
	var err error

	result, err = r.Clone()
	if err != nil {
		return nil, fmt.Errorf("failed executing template expressions in release \"%s\": %v", r.Name, err)
	}

	{
		ts := result.Chart
		result.Chart, err = renderer.RenderTemplateContentToString([]byte(ts))
		if err != nil {
			return nil, fmt.Errorf("failed executing template expressions in release \"%s\".chart = \"%s\": %v", r.Name, ts, err)
		}
	}

	{
		ts := result.Namespace
		result.Namespace, err = renderer.RenderTemplateContentToString([]byte(ts))
		if err != nil {
			return nil, fmt.Errorf("failed executing template expressions in release \"%s\".namespace = \"%s\": %v", r.Name, ts, err)
		}
	}

	for i, t := range result.Values {
		switch ts := t.(type) {
		case string:
			s, err := renderer.RenderTemplateContentToBuffer([]byte(ts))
			if err != nil {
				return nil, fmt.Errorf("failed executing template expressions in release \"%s\".values[%d] = \"%s\": %v", r.Name, i, ts, err)
			}
			result.Values[i] = s.String()
		}
	}

	for i, ts := range result.Secrets {
		s, err := renderer.RenderTemplateContentToBuffer([]byte(ts))
		if err != nil {
			return nil, fmt.Errorf("failed executing template expressions in release \"%s\".secrets[%d] = \"%s\": %v", r.Name, i, ts, err)
		}
		result.Secrets[i] = s.String()
	}

	return result, nil
}

func (r ReleaseSpec) Clone() (*ReleaseSpec, error) {
	serialized, err := yaml.Marshal(r)
	if err != nil {
		return nil, fmt.Errorf("failed cloning release \"%s\": %v", r.Name, err)
	}

	var deserialized ReleaseSpec

	if err := yaml.Unmarshal(serialized, &deserialized); err != nil {
		return nil, fmt.Errorf("failed cloning release \"%s\": %v", r.Name, err)
	}

	return &deserialized, nil
}