var ValidSchemaVersions = []string{
    "1.0",
}

type BuildOption struct {
    Name     string   `yaml:"name"`
    Packages []string `yaml:"packages"`
}

type Configuration struct {
    StackConfig StackConfiguration `yaml:"configuration"`
}

type EnvironmentFile struct {
    Environment map[string]string `yaml:"environment"`
}

type Function struct {
    // Name of deployed function
    Name string `yaml:"-"`

    Language string `yaml:"lang"`

    // Handler Local folder to use for function
    Handler string `yaml:"handler"`

    // Image Docker image name
    Image string `yaml:"image"`

    // Docker registry Authorization
    RegistryAuth string `yaml:"registry_auth,omitempty"`

    FProcess string `yaml:"fprocess"`

    Environment map[string]string `yaml:"environment"`

    // Secrets list of secrets to be made available to function
    Secrets []string `yaml:"secrets"`

    SkipBuild bool `yaml:"skip_build"`

    Constraints *[]string `yaml:"constraints"`

    // EnvironmentFile is a list of files to import and override environmental variables.
    // These are overriden in order.
    EnvironmentFile []string `yaml:"environment_file"`

    Labels *map[string]string `yaml:"labels"`

    // Limits for function
    Limits *FunctionResources `yaml:"limits"`

    // Requests of resources requested by function
    Requests *FunctionResources `yaml:"requests"`

    // ReadOnlyRootFilesystem is used to set the container filesystem to read-only
    ReadOnlyRootFilesystem bool `yaml:"readonly_root_filesystem"`

    // BuildOptions to determine native packages
    BuildOptions []string `yaml:"build_options"`

    // Annotations
    Annotations *map[string]string `yaml:"annotations"`

    // Namespace of the function
    Namespace string `yaml:"namespace,omitempty"`
}

type FunctionResources struct {
    Memory string `yaml:"memory"`
    CPU    string `yaml:"cpu"`
}

type LanguageTemplate struct {
    Language     string        `yaml:"language,omitempty"`
    FProcess     string        `yaml:"fprocess,omitempty"`
    BuildOptions []BuildOption `yaml:"build_options,omitempty"`
    // WelcomeMessage is printed to the user after generating a function
    WelcomeMessage string `yaml:"welcome_message,omitempty"`
    // HandlerFolder to copy the function code into
    HandlerFolder string `yaml:"handler_folder,omitempty"`
}

type Provider struct {
    Name       string `yaml:"name"`
    GatewayURL string `yaml:"gateway"`
    Network    string `yaml:"network"`
}

type Services struct {
    Version            string              `yaml:"version,omitempty"`
    Functions          map[string]Function `yaml:"functions,omitempty"`
    Provider           Provider            `yaml:"provider,omitempty"`
    StackConfiguration StackConfiguration  `yaml:"configuration,omitempty"`
}

type StackConfiguration struct {
    TemplateConfigs []TemplateSource `yaml:"templates"`
    // CopyExtraPaths specifies additional paths (relative to the stack file) that will be copied
    // into the functions build context, e.g. specifying `"common"` will look for and copy the
    // "common/" folder of file in the same root as the stack file.  All paths must be contained
    // within the project root defined by the location of the stack file.
    //
    // The yaml uses the shorter name `copy` to make it easier for developers to read and use
    CopyExtraPaths []string `yaml:"copy"`
}

type TemplateSource struct {
    Name   string `yaml:"name"`
    Source string `yaml:"source,omitempty"`
}