//go:generate struct-markdown

package ecs

import (
	"fmt"
	"regexp"
	"strings"

	"github.com/hashicorp/packer/helper/config"
	"github.com/hashicorp/packer/template/interpolate"
)

type AlicloudDiskDevice struct {
	// The value of disk name is blank by default. [2,
	// 128] English or Chinese characters, must begin with an
	// uppercase/lowercase letter or Chinese character. Can contain numbers,
	// ., _ and -. The disk name will appear on the console. It cannot
	// begin with http:// or https://.
	DiskName string `mapstructure:"disk_name" required:"false"`
	// Category of the system disk. Optional values
	// are:
	//     -   cloud - general cloud disk
	//     -   cloud_efficiency - efficiency cloud disk
	//     -   cloud_ssd - cloud SSD
	DiskCategory string `mapstructure:"disk_category" required:"false"`
	// Size of the system disk, measured in GiB. Value
	// range: [20, 500]. The specified value must be equal to or greater
	// than max{20, ImageSize}. Default value: max{40, ImageSize}.
	DiskSize int `mapstructure:"disk_size" required:"false"`
	// Snapshots are used to create the data
	// disk After this parameter is specified, Size is ignored. The actual
	// size of the created disk is the size of the specified snapshot.
	SnapshotId string `mapstructure:"disk_snapshot_id" required:"false"`
	// The value of disk description is blank by
	// default. [2, 256] characters. The disk description will appear on the
	// console. It cannot begin with http:// or https://.
	Description string `mapstructure:"disk_description" required:"false"`
	// Whether or not the disk is
	// released along with the instance:
	DeleteWithInstance bool `mapstructure:"disk_delete_with_instance" required:"false"`
	// Device information of the related instance:
	// such as /dev/xvdb It is null unless the Status is In_use.
	Device string `mapstructure:"disk_device" required:"false"`
	// Whether or not to encrypt the data disk.
	// If this option is set to true, the data disk will be encryped and corresponding snapshot in the target image will also be encrypted. By
	// default, if this is an extra data disk, Packer will not encrypt the
	// data disk. Otherwise, Packer will keep the encryption setting to what
	// it was in the source image. Please refer to Introduction of ECS disk encryption
	// for more details.
	Encrypted config.Trilean `mapstructure:"disk_encrypted" required:"false"`
}

type AlicloudDiskDevices struct {
	// Image disk mapping for system
	// disk.
	// -   `disk_category` (string) - Category of the system disk. Optional values
	//     are:
	//         -   `cloud` - general cloud disk
	//         -   `cloud_efficiency` - efficiency cloud disk
	//         -   `cloud_ssd` - cloud SSD
	//
	//         For phased-out instance types and non-I/O optimized instances, the
	//         default value is cloud. Otherwise, the default value is
	//         cloud\_efficiency.
	//
	// -   `disk_description` (string) - The value of disk description is blank by
	//     default. \[2, 256\] characters. The disk description will appear on the
	//     console. It cannot begin with `http://` or `https://`.
	//
	// -   `disk_name` (string) - The value of disk name is blank by default. \[2,
	//     128\] English or Chinese characters, must begin with an
	//     uppercase/lowercase letter or Chinese character. Can contain numbers,
	//     `.`, `_` and `-`. The disk name will appear on the console. It cannot
	//     begin with `http://` or `https://`.
	//
	// -   `disk_size` (number) - Size of the system disk, measured in GiB. Value
	//     range: \[20, 500\]. The specified value must be equal to or greater
	//     than max{20, ImageSize}. Default value: max{40, ImageSize}.
	//
	ECSSystemDiskMapping AlicloudDiskDevice `mapstructure:"system_disk_mapping" required:"false"`
	// Add one or more data
	// disks to the image.
	//
	// -   `disk_category` (string) - Category of the data disk. Optional values
	//     are:
	//     -   `cloud` - general cloud disk
	//     -   `cloud_efficiency` - efficiency cloud disk
	//     -   `cloud_ssd` - cloud SSD
	//
	//     Default value: cloud.
	//
	// -   `disk_delete_with_instance` (boolean) - Whether or not the disk is
	//     released along with the instance:
	//     -   True indicates that when the instance is released, this disk will
	//         be released with it
	//     -   False indicates that when the instance is released, this disk will
	//         be retained.
	// -   `disk_description` (string) - The value of disk description is blank by
	//     default. \[2, 256\] characters. The disk description will appear on the
	//     console. It cannot begin with `http://` or `https://`.
	//
	// -   `disk_device` (string) - Device information of the related instance:
	//     such as `/dev/xvdb` It is null unless the Status is In\_use.
	//
	// -   `disk_name` (string) - The value of disk name is blank by default. \[2,
	//     128\] English or Chinese characters, must begin with an
	//     uppercase/lowercase letter or Chinese character. Can contain numbers,
	//     `.`, `_` and `-`. The disk name will appear on the console. It cannot
	//     begin with `http://` or `https://`.
	//
	// -   `disk_size` (number) - Size of the data disk, in GB, values range:
	//     -   `cloud` - 5 \~ 2000
	//     -   `cloud_efficiency` - 20 \~ 2048
	//     -   `cloud_ssd` - 20 \~ 2048
	//
	//     The value should be equal to or greater than the size of the specific
	//     SnapshotId.
	//
	// -   `disk_snapshot_id` (string) - Snapshots are used to create the data
	//     disk After this parameter is specified, Size is ignored. The actual
	//     size of the created disk is the size of the specified snapshot.
	//
	//     Snapshots from on or before July 15, 2013 cannot be used to create a
	//     disk.
	//
	// -   `disk_encrypted` (boolean) - Whether or not to encrypt the data disk.
	//     If this option is set to true, the data disk will be encryped and corresponding snapshot in the target image will also be encrypted. By
	//     default, if this is an extra data disk, Packer will not encrypt the
	//     data disk. Otherwise, Packer will keep the encryption setting to what
	//     it was in the source image. Please refer to Introduction of [ECS disk encryption](https://www.alibabacloud.com/help/doc-detail/59643.htm)
	//     for more details.
	//
	ECSImagesDiskMappings []AlicloudDiskDevice `mapstructure:"image_disk_mappings" required:"false"`
}

type AlicloudImageConfig struct {
	// The name of the user-defined image, [2, 128]
	// English or Chinese characters. It must begin with an uppercase/lowercase
	// letter or a Chinese character, and may contain numbers, _ or -. It
	// cannot begin with http:// or https://.
	AlicloudImageName string `mapstructure:"image_name" required:"true"`
	// The version number of the image, with a length
	// limit of 1 to 40 English characters.
	AlicloudImageVersion string `mapstructure:"image_version" required:"false"`
	// The description of the image, with a length
	// limit of 0 to 256 characters. Leaving it blank means null, which is the
	// default value. It cannot begin with http:// or https://.
	AlicloudImageDescription string `mapstructure:"image_description" required:"false"`
	// The IDs of to-be-added Aliyun
	// accounts to which the image is shared. The number of accounts is 1 to 10.
	// If number of accounts is greater than 10, this parameter is ignored.
	AlicloudImageShareAccounts   []string `mapstructure:"image_share_account" required:"false"`
	AlicloudImageUNShareAccounts []string `mapstructure:"image_unshare_account"`
	// Copy to the destination regionIds.
	AlicloudImageDestinationRegions []string `mapstructure:"image_copy_regions" required:"false"`
	// The name of the destination image,
	// [2, 128] English or Chinese characters. It must begin with an
	// uppercase/lowercase letter or a Chinese character, and may contain numbers,
	// _ or -. It cannot begin with http:// or https://.
	AlicloudImageDestinationNames []string `mapstructure:"image_copy_names" required:"false"`
	// Whether or not to encrypt the target images,            including those copied if image_copy_regions is specified. If this option
	// is set to true, a temporary image will be created from the provisioned
	// instance in the main region and an encrypted copy will be generated in the
	// same region. By default, Packer will keep the encryption setting to what
	// it was in the source image.
	ImageEncrypted config.Trilean `mapstructure:"image_encrypted" required:"false"`
	// If this value is true, when the target image names including those
	// copied are duplicated with existing images, it will delete the existing
	// images and then create the target images, otherwise, the creation will
	// fail. The default value is false. Check `image_name` and
	// `image_copy_names` options for names of target images. If
	// [-force](https://packer.io/docs/commands/build.html#force) option is
	// provided in `build` command, this option can be omitted and taken as
	// true.
	AlicloudImageForceDelete bool `mapstructure:"image_force_delete" required:"false"`
	// If this value is true, when delete the duplicated existing images, the
	// source snapshots of those images will be delete either. If
	// [-force](https://packer.io/docs/commands/build.html#force) option is
	// provided in `build` command, this option can be omitted and taken as
	// true.
	AlicloudImageForceDeleteSnapshots bool `mapstructure:"image_force_delete_snapshots" required:"false"`
	AlicloudImageForceDeleteInstances bool `mapstructure:"image_force_delete_instances"`
	// If this value is true, the image
	// created will not include any snapshot of data disks. This option would be
	// useful for any circumstance that default data disks with instance types are
	// not concerned. The default value is false.
	AlicloudImageIgnoreDataDisks bool `mapstructure:"image_ignore_data_disks" required:"false"`
	// The region validation can be skipped
	// if this value is true, the default value is false.
	AlicloudImageSkipRegionValidation bool `mapstructure:"skip_region_validation" required:"false"`
	// Tags applied to the destination
	// image and relevant snapshots.
	AlicloudImageTags   map[string]string `mapstructure:"tags" required:"false"`
	AlicloudDiskDevices `mapstructure:",squash"`
}

func (c *AlicloudImageConfig) Prepare(ctx *interpolate.Context) []error {
	var errs []error
	if c.AlicloudImageName == "" {
		errs = append(errs, fmt.Errorf("image_name must be specified"))
	} else if len(c.AlicloudImageName) < 2 || len(c.AlicloudImageName) > 128 {
		errs = append(errs, fmt.Errorf("image_name must less than 128 letters and more than 1 letters"))
	} else if strings.HasPrefix(c.AlicloudImageName, "http://") ||
		strings.HasPrefix(c.AlicloudImageName, "https://") {
		errs = append(errs, fmt.Errorf("image_name can't start with 'http://' or 'https://'"))
	}
	reg := regexp.MustCompile("\\s+")
	if reg.FindString(c.AlicloudImageName) != "" {
		errs = append(errs, fmt.Errorf("image_name can't include spaces"))
	}

	if len(c.AlicloudImageDestinationRegions) > 0 {
		regionSet := make(map[string]struct{})
		regions := make([]string, 0, len(c.AlicloudImageDestinationRegions))

		for _, region := range c.AlicloudImageDestinationRegions {
			// If we already saw the region, then don't look again
			if _, ok := regionSet[region]; ok {
				continue
			}

			// Mark that we saw the region
			regionSet[region] = struct{}{}
			regions = append(regions, region)
		}

		c.AlicloudImageDestinationRegions = regions
	}

	if len(errs) > 0 {
		return errs
	}

	return nil
}