package fs

import (
	"net"
	"strings"
	"time"
)

// Global
var (
	// Config is the global config
	Config = NewConfig()

	// Read a value from the config file
	//
	// This is a function pointer to decouple the config
	// implementation from the fs
	ConfigFileGet = func(section, key string) (string, bool) { return "", false }

	// Set a value into the config file
	//
	// This is a function pointer to decouple the config
	// implementation from the fs
	ConfigFileSet = func(section, key, value string) {
		Errorf(nil, "No config handler to set %q = %q in section %q of the config file", key, value, section)
	}

	// CountError counts an error.  If any errors have been
	// counted then it will exit with a non zero error code.
	//
	// This is a function pointer to decouple the config
	// implementation from the fs
	CountError = func(err error) {}

	// ConfigProvider is the config key used for provider options
	ConfigProvider = "provider"
)

// ConfigInfo is filesystem config options
type ConfigInfo struct {
	LogLevel              LogLevel
	StatsLogLevel         LogLevel
	DryRun                bool
	CheckSum              bool
	SizeOnly              bool
	IgnoreTimes           bool
	IgnoreExisting        bool
	IgnoreErrors          bool
	ModifyWindow          time.Duration
	Checkers              int
	Transfers             int
	ConnectTimeout        time.Duration // Connect timeout
	Timeout               time.Duration // Data channel timeout
	Dump                  DumpFlags
	InsecureSkipVerify    bool // Skip server certificate verification
	DeleteMode            DeleteMode
	MaxDelete             int64
	TrackRenames          bool // Track file renames.
	LowLevelRetries       int
	UpdateOlder           bool // Skip files that are newer on the destination
	NoGzip                bool // Disable compression
	MaxDepth              int
	IgnoreSize            bool
	IgnoreChecksum        bool
	NoTraverse            bool
	NoUpdateModTime       bool
	DataRateUnit          string
	BackupDir             string
	Suffix                string
	UseListR              bool
	BufferSize            SizeSuffix
	BwLimit               BwTimetable
	TPSLimit              float64
	TPSLimitBurst         int
	BindAddr              net.IP
	DisableFeatures       []string
	UserAgent             string
	Immutable             bool
	AutoConfirm           bool
	StreamingUploadCutoff SizeSuffix
	StatsFileNameLength   int
	AskPassword           bool
	UseServerModTime      bool
	MaxTransfer           SizeSuffix
	MaxBacklog            int
	StatsOneLine          bool
	Progress              bool
}

// NewConfig creates a new config with everything set to the default
// value.  These are the ultimate defaults and are overriden by the
// config module.
func NewConfig() *ConfigInfo {
	c := new(ConfigInfo)

	// Set any values which aren't the zero for the type
	c.LogLevel = LogLevelNotice
	c.StatsLogLevel = LogLevelInfo
	c.ModifyWindow = time.Nanosecond
	c.Checkers = 8
	c.Transfers = 4
	c.ConnectTimeout = 60 * time.Second
	c.Timeout = 5 * 60 * time.Second
	c.DeleteMode = DeleteModeDefault
	c.MaxDelete = -1
	c.LowLevelRetries = 10
	c.MaxDepth = -1
	c.DataRateUnit = "bytes"
	c.BufferSize = SizeSuffix(16 << 20)
	c.UserAgent = "rclone/" + Version
	c.StreamingUploadCutoff = SizeSuffix(100 * 1024)
	c.StatsFileNameLength = 40
	c.AskPassword = true
	c.TPSLimitBurst = 1
	c.MaxTransfer = -1
	c.MaxBacklog = 10000

	return c
}

// ConfigToEnv converts an config section and name, eg ("myremote",
// "ignore-size") into an environment name
// "RCLONE_CONFIG_MYREMOTE_IGNORE_SIZE"
func ConfigToEnv(section, name string) string {
	return "RCLONE_CONFIG_" + strings.ToUpper(strings.Replace(section+"_"+name, "-", "_", -1))
}

// OptionToEnv converts an option name, eg "ignore-size" into an
// environment name "RCLONE_IGNORE_SIZE"
func OptionToEnv(name string) string {
	return "RCLONE_" + strings.ToUpper(strings.Replace(name, "-", "_", -1))
}