/*
Copyright 2022 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package civocloud

import (
	"bytes"
	"encoding/json"
	"errors"
	"fmt"
	"strings"
)

// DiskImage represents a DiskImage for launching instances from
type DiskImage struct {
	ID           string `json:"id,omitempty"`
	Name         string `json:"name,omitempty"`
	Version      string `json:"version,omitempty"`
	State        string `json:"state,omitempty"`
	Distribution string `json:"distribution,omitempty"`
	Description  string `json:"description,omitempty"`
	Label        string `json:"label,omitempty"`
}

// ListDiskImages return all disk image in system
func (c *Client) ListDiskImages() ([]DiskImage, error) {
	resp, err := c.SendGetRequest("/v2/disk_images")
	if err != nil {
		return nil, decodeError(err)
	}

	diskImages := make([]DiskImage, 0)
	if err := json.NewDecoder(bytes.NewReader(resp)).Decode(&diskImages); err != nil {
		return nil, err
	}

	filteredDiskImages := make([]DiskImage, 0)
	for _, diskImage := range diskImages {
		if !strings.Contains(diskImage.Name, "k3s") {
			filteredDiskImages = append(filteredDiskImages, diskImage)
		}
	}

	return filteredDiskImages, nil
}

// GetDiskImage get one disk image using the id
func (c *Client) GetDiskImage(id string) (*DiskImage, error) {
	resp, err := c.SendGetRequest(fmt.Sprintf("/v2/disk_images/%s", id))
	if err != nil {
		return nil, decodeError(err)
	}

	diskImage := &DiskImage{}
	if err := json.NewDecoder(bytes.NewReader(resp)).Decode(&diskImage); err != nil {
		return nil, err
	}

	return diskImage, nil
}

// FindDiskImage finds a disk image by either part of the ID or part of the name
func (c *Client) FindDiskImage(search string) (*DiskImage, error) {
	templateList, err := c.ListDiskImages()
	if err != nil {
		return nil, decodeError(err)
	}

	exactMatch := false
	partialMatchesCount := 0
	result := DiskImage{}

	for _, value := range templateList {
		if value.Name == search || value.ID == search {
			exactMatch = true
			result = value
		} else if strings.Contains(value.Name, search) || strings.Contains(value.ID, search) {
			if !exactMatch {
				result = value
				partialMatchesCount++
			}
		}
	}

	if exactMatch || partialMatchesCount == 1 {
		return &result, nil
	} else if partialMatchesCount > 1 {
		err := fmt.Errorf("unable to find %s because there were multiple matches", search)
		return nil, MultipleMatchesError.wrap(err)
	} else {
		err := fmt.Errorf("unable to find %s, zero matches", search)
		return nil, ZeroMatchesError.wrap(err)
	}
}

// GetDiskImageByName finds the DiskImage for an account with the specified code
func (c *Client) GetDiskImageByName(name string) (*DiskImage, error) {
	resp, err := c.ListDiskImages()
	if err != nil {
		return nil, decodeError(err)
	}

	for _, diskimage := range resp {
		if diskimage.Name == name {
			return &diskimage, nil
		}
	}

	return nil, errors.New("diskimage not found")
}