package command

import (
	"io/ioutil"
	"path/filepath"
)

func init() {
	cmdScaffold.Run = runScaffold // break init cycle
}

var cmdScaffold = &Command{
	UsageLine: "scaffold -config=[filer|notification|replication|security|master]",
	Short:     "generate basic configuration files",
	Long: `Generate filer.toml with all possible configurations for you to customize.

  `,
}

var (
	outputPath = cmdScaffold.Flag.String("output", "", "if not empty, save the configuration file to this directory")
	config     = cmdScaffold.Flag.String("config", "filer", "[filer|notification|replication|security|master] the configuration file to generate")
)

func runScaffold(cmd *Command, args []string) bool {

	content := ""
	switch *config {
	case "filer":
		content = FILER_TOML_EXAMPLE
	case "notification":
		content = NOTIFICATION_TOML_EXAMPLE
	case "replication":
		content = REPLICATION_TOML_EXAMPLE
	case "security":
		content = SECURITY_TOML_EXAMPLE
	case "master":
		content = MASTER_TOML_EXAMPLE
	}
	if content == "" {
		println("need a valid -config option")
		return false
	}

	if *outputPath != "" {
		ioutil.WriteFile(filepath.Join(*outputPath, *config+".toml"), []byte(content), 0644)
	} else {
		println(content)
	}
	return true
}

const (
	FILER_TOML_EXAMPLE = `
# A sample TOML config file for SeaweedFS filer store
# Used with "weed filer" or "weed server -filer"
# Put this file to one of the location, with descending priority
#    ./filer.toml
#    $HOME/.seaweedfs/filer.toml
#    /etc/seaweedfs/filer.toml

[memory]
# local in memory, mostly for testing purpose
enabled = false

[leveldb]
# local on disk, mostly for simple single-machine setup, fairly scalable
enabled = false
dir = "."					# directory to store level db files

[leveldb2]
# local on disk, mostly for simple single-machine setup, fairly scalable
# faster than previous leveldb, recommended.
enabled = true
dir = "."					# directory to store level db files

####################################################
# multiple filers on shared storage, fairly scalable
####################################################

[mysql]
# CREATE TABLE IF NOT EXISTS filemeta (
#   dirhash     BIGINT         COMMENT 'first 64 bits of MD5 hash value of directory field',
#   name        VARCHAR(1000)  COMMENT 'directory or file name',
#   directory   TEXT           COMMENT 'full path to parent directory',
#   meta        LONGBLOB,
#   PRIMARY KEY (dirhash, name)
# ) DEFAULT CHARSET=utf8;

enabled = false
hostname = "localhost"
port = 3306
username = "root"
password = ""
database = ""              # create or use an existing database
connection_max_idle = 2
connection_max_open = 100

[postgres]
# CREATE TABLE IF NOT EXISTS filemeta (
#   dirhash     BIGINT,
#   name        VARCHAR(65535),
#   directory   VARCHAR(65535),
#   meta        bytea,
#   PRIMARY KEY (dirhash, name)
# );
enabled = false
hostname = "localhost"
port = 5432
username = "postgres"
password = ""
database = ""              # create or use an existing database
sslmode = "disable"
connection_max_idle = 100
connection_max_open = 100

[cassandra]
# CREATE TABLE filemeta (
#    directory varchar,
#    name varchar,
#    meta blob,
#    PRIMARY KEY (directory, name)
# ) WITH CLUSTERING ORDER BY (name ASC);
enabled = false
keyspace="seaweedfs"
hosts=[
	"localhost:9042",
]

[redis]
enabled = false
address  = "localhost:6379"
password = ""
db = 0

[redis_cluster]
enabled = false
addresses = [
    "localhost:30001",
    "localhost:30002",
    "localhost:30003",
    "localhost:30004",
    "localhost:30005",
    "localhost:30006",
]
password = ""

`

	NOTIFICATION_TOML_EXAMPLE = `
# A sample TOML config file for SeaweedFS filer store
# Used by both "weed filer" or "weed server -filer" and "weed filer.replicate"
# Put this file to one of the location, with descending priority
#    ./notification.toml
#    $HOME/.seaweedfs/notification.toml
#    /etc/seaweedfs/notification.toml

####################################################
# notification
# send and receive filer updates for each file to an external message queue
####################################################
[notification.log]
# this is only for debugging perpose and does not work with "weed filer.replicate"
enabled = false


[notification.kafka]
enabled = false
hosts = [
  "localhost:9092"
]
topic = "seaweedfs_filer"
offsetFile = "./last.offset"
offsetSaveIntervalSeconds = 10


[notification.aws_sqs]
# experimental, let me know if it works
enabled = false
aws_access_key_id     = ""        # if empty, loads from the shared credentials file (~/.aws/credentials).
aws_secret_access_key = ""        # if empty, loads from the shared credentials file (~/.aws/credentials).
region = "us-east-2"
sqs_queue_name = "my_filer_queue" # an existing queue name


[notification.google_pub_sub]
# read credentials doc at https://cloud.google.com/docs/authentication/getting-started
enabled = false
google_application_credentials = "/path/to/x.json" # path to json credential file
project_id = ""                       # an existing project id
topic = "seaweedfs_filer_topic"       # a topic, auto created if does not exists

[notification.gocdk_pub_sub]
# The Go Cloud Development Kit (https://gocloud.dev).
# PubSub API (https://godoc.org/gocloud.dev/pubsub).
# Supports AWS SNS/SQS, Azure Service Bus, Google PubSub, NATS and RabbitMQ.
enabled = false
# This URL will Dial the RabbitMQ server at the URL in the environment
# variable RABBIT_SERVER_URL and open the exchange "myexchange".
# The exchange must have already been created by some other means, like
# the RabbitMQ management plugin.
topic_url = "rabbit://myexchange"
sub_url = "rabbit://myqueue"
`

	REPLICATION_TOML_EXAMPLE = `
# A sample TOML config file for replicating SeaweedFS filer
# Used with "weed filer.replicate"
# Put this file to one of the location, with descending priority
#    ./replication.toml
#    $HOME/.seaweedfs/replication.toml
#    /etc/seaweedfs/replication.toml

[source.filer]
enabled = true
grpcAddress = "localhost:18888"
# all files under this directory tree are replicated.
# this is not a directory on your hard drive, but on your filer.
# i.e., all files with this "prefix" are sent to notification message queue.
directory = "/buckets"    

[sink.filer]
enabled = false
grpcAddress = "localhost:18888"
# all replicated files are under this directory tree
# this is not a directory on your hard drive, but on your filer.     
# i.e., all received files will be "prefixed" to this directory.
directory = "/backup"    
replication = ""
collection = ""
ttlSec = 0

[sink.s3]
# read credentials doc at https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/sessions.html
# default loads credentials from the shared credentials file (~/.aws/credentials). 
enabled = false
aws_access_key_id     = ""     # if empty, loads from the shared credentials file (~/.aws/credentials).
aws_secret_access_key = ""     # if empty, loads from the shared credentials file (~/.aws/credentials).
region = "us-east-2"
bucket = "your_bucket_name"    # an existing bucket
directory = "/"                # destination directory

[sink.google_cloud_storage]
# read credentials doc at https://cloud.google.com/docs/authentication/getting-started
enabled = false
google_application_credentials = "/path/to/x.json" # path to json credential file
bucket = "your_bucket_seaweedfs"    # an existing bucket
directory = "/"                     # destination directory

[sink.azure]
# experimental, let me know if it works
enabled = false
account_name = ""
account_key  = ""
container = "mycontainer"      # an existing container
directory = "/"                # destination directory

[sink.backblaze]
enabled = false
b2_account_id = ""
b2_master_application_key  = ""
bucket = "mybucket"            # an existing bucket
directory = "/"                # destination directory

`

	SECURITY_TOML_EXAMPLE = `
# Put this file to one of the location, with descending priority
#    ./security.toml
#    $HOME/.seaweedfs/security.toml
#    /etc/seaweedfs/security.toml
# this file is read by master, volume server, and filer

# the jwt signing key is read by master and volume server.
# a jwt defaults to expire after 10 seconds.
[jwt.signing]
key = ""
expires_after_seconds = 10           # seconds

# jwt for read is only supported with master+volume setup. Filer does not support this mode.
[jwt.signing.read]
key = ""
expires_after_seconds = 10           # seconds

# all grpc tls authentications are mutual
# the values for the following ca, cert, and key are paths to the PERM files.
# the host name is not checked, so the PERM files can be shared.
[grpc]
ca = ""

[grpc.volume]
cert = ""
key  = ""

[grpc.master]
cert = ""
key  = ""

[grpc.filer]
cert = ""
key  = ""

# use this for any place needs a grpc client
# i.e., "weed backup|benchmark|filer.copy|filer.replicate|mount|s3|upload"
[grpc.client]
cert = ""
key  = ""


# volume server https options
# Note: work in progress!
#     this does not work with other clients, e.g., "weed filer|mount" etc, yet.
[https.client]
enabled = true
[https.volume]
cert = ""
key  = ""


`

	MASTER_TOML_EXAMPLE = `
# Put this file to one of the location, with descending priority
#    ./master.toml
#    $HOME/.seaweedfs/master.toml
#    /etc/seaweedfs/master.toml
# this file is read by master

[master.maintenance]
# periodically run these scripts are the same as running them from 'weed shell'
scripts = """
  ec.encode -fullPercent=95 -quietFor=1h
  ec.rebuild -force
  ec.balance -force
  volume.balance -force
"""
sleep_minutes = 17          # sleep minutes between each script execution

`
)