package egoscale

import (
	"context"
	"fmt"

	"github.com/jinzhu/copier"
)

// Get fetches the resource
func (temp *Template) Get(ctx context.Context, client *Client) error {

	req, err := temp.ListRequest()
	if err != nil {
		return err
	}

	templates := []Template{}
	var listError error
	client.Paginate(req, func(i interface{}, err error) bool {
		if err != nil {
			listError = err
			return false
		}
		templates = append(templates, *i.(*Template))
		return true
	})
	if listError != nil {
		return listError
	}

	count := len(templates)
	if count == 0 {
		return &ErrorResponse{
			ErrorCode: ParamError,
			ErrorText: fmt.Sprintf("Template not found."),
		}
	} else if count > 1 {
		return fmt.Errorf("More than one Template was found")
	}

	return copier.Copy(temp, templates[0])
}

// ListRequest builds the ListTemplates request
func (temp *Template) ListRequest() (ListCommand, error) {
	req := &ListTemplates{
		Name:       temp.Name,
		Account:    temp.Account,
		DomainID:   temp.DomainID,
		ID:         temp.ID,
		ZoneID:     temp.ZoneID,
		Hypervisor: temp.Hypervisor,
		//TODO Tags
	}
	if temp.IsFeatured {
		req.TemplateFilter = "featured"
	}
	if temp.Removed != "" {
		*req.ShowRemoved = true
	}

	return req, nil
}

func (*ListTemplates) each(resp interface{}, callback IterateItemFunc) {
	temps, ok := resp.(*ListTemplatesResponse)
	if !ok {
		callback(nil, fmt.Errorf("ListTemplatesResponse expected, got %t", resp))
		return
	}

	for i := range temps.Template {
		if !callback(&temps.Template[i], nil) {
			break
		}
	}
}

// SetPage sets the current page
func (ls *ListTemplates) SetPage(page int) {
	ls.Page = page
}

// SetPageSize sets the page size
func (ls *ListTemplates) SetPageSize(pageSize int) {
	ls.PageSize = pageSize
}

// ResourceType returns the type of the resource
func (*Template) ResourceType() string {
	return "Template"
}

func (*ListTemplates) name() string {
	return "listTemplates"
}

func (*ListTemplates) response() interface{} {
	return new(ListTemplatesResponse)
}

func (*CreateTemplate) name() string {
	return "createTemplate"
}

func (*CreateTemplate) asyncResponse() interface{} {
	return new(CreateTemplateResponse)
}

func (*PrepareTemplate) name() string {
	return "prepareTemplate"
}

func (*PrepareTemplate) asyncResponse() interface{} {
	return new(PrepareTemplateResponse)
}

func (*CopyTemplate) name() string {
	return "copyTemplate"
}

func (*CopyTemplate) asyncResponse() interface{} {
	return new(CopyTemplateResponse)
}

func (*UpdateTemplate) name() string {
	return "updateTemplate"
}

func (*UpdateTemplate) asyncResponse() interface{} {
	return new(UpdateTemplateResponse)
}

func (*DeleteTemplate) name() string {
	return "deleteTemplate"
}

func (*DeleteTemplate) asyncResponse() interface{} {
	return new(booleanResponse)
}

func (*RegisterTemplate) name() string {
	return "registerTemplate"
}

func (*RegisterTemplate) response() interface{} {
	return new(RegisterTemplateResponse)
}