var (
	// See issue #8979 for context.
	// Hugo has always used config.toml etc. as the default config file name.
	// But hugo.toml is a more descriptive name, but we need to check for both.
	DefaultConfigNames = []string{"hugo", "config"}

	DefaultConfigNamesSet = make(map[string]bool)

	ValidConfigFileExtensions = []string{"toml", "yaml", "yml", "json"}
)

type AllProvider interface {
	Language() *langs.Language
	Languages() langs.Languages
	LanguagesDefaultFirst() langs.Languages
	LanguagePrefix() string
	BaseURL() urls.BaseURL
	BaseURLLiveReload() urls.BaseURL
	PathParser() *paths.PathParser
	Environment() string
	IsMultihost() bool
	IsMultilingual() bool
	NoBuildLock() bool
	BaseConfig() BaseConfig
	Dirs() CommonDirs
	Quiet() bool
	DirsBase() CommonDirs
	ContentTypes() ContentTypesProvider
	GetConfigSection(string) any
	GetConfig() any
	CanonifyURLs() bool
	DisablePathToLower() bool
	RemovePathAccents() bool
	IsUglyURLs(section string) bool
	DefaultContentLanguage() string
	DefaultContentLanguageInSubdir() bool
	IsLangDisabled(string) bool
	SummaryLength() int
	Pagination() Pagination
	BuildExpired() bool
	BuildFuture() bool
	BuildDrafts() bool
	Running() bool
	Watching() bool
	NewIdentityManager(name string, opts ...identity.ManagerOption) identity.Manager
	FastRenderMode() bool
	PrintUnusedTemplates() bool
	EnableMissingTranslationPlaceholders() bool
	TemplateMetrics() bool
	TemplateMetricsHints() bool
	PrintI18nWarnings() bool
	CreateTitle(s string) string
	IgnoreFile(s string) bool
	NewContentEditor() string
	Timeout() time.Duration
	StaticDirs() []string
	IgnoredLogs() map[string]bool
	WorkingDir() string
	EnableEmoji() bool
}

type BaseConfig struct {
	WorkingDir string
	CacheDir   string
	ThemesDir  string
	PublishDir string
}

type BuildConfig struct {
	// When to use the resource file cache.
	// One of never, fallback, always. Default is fallback
	UseResourceCacheWhen string

	// When enabled, will collect and write a hugo_stats.json with some build
	// related aggregated data (e.g. CSS class names).
	// Note that this was a bool <= v0.115.0.
	BuildStats BuildStats

	// Can be used to toggle off writing of the IntelliSense /assets/jsconfig.js
	// file.
	NoJSConfigInAssets bool

	// Can used to control how the resource cache gets evicted on rebuilds.
	CacheBusters []CacheBuster
}

type BuildStats struct {
	Enable         bool
	DisableTags    bool
	DisableClasses bool
	DisableIDs     bool
}

type CacheBuster struct {
	// Trigger for files matching this regexp.
	Source string

	// Cache bust targets matching this regexp.
	// This regexp can contain group matches (e.g. $1) from the source regexp.
	Target string
	// contains filtered or unexported fields
}

type CommonDirs struct {
	// The directory where Hugo will look for themes.
	ThemesDir string

	// Where to put the generated files.
	PublishDir string

	// The directory to put the generated resources files. This directory should in most situations be considered temporary
	// and not be committed to version control. But there may be cached content in here that you want to keep,
	// e.g. resources/_gen/images for performance reasons or CSS built from SASS when your CI server doesn't have the full setup.
	ResourceDir string

	// The project root directory.
	WorkingDir string

	// The root directory for all cache files.
	CacheDir string

	// The content source directory.
	// Deprecated: Use module mounts.
	ContentDir string
	// Deprecated: Use module mounts.
	// The data source directory.
	DataDir string
	// Deprecated: Use module mounts.
	// The layout source directory.
	LayoutDir string
	// Deprecated: Use module mounts.
	// The i18n source directory.
	I18nDir string
	// Deprecated: Use module mounts.
	// The archetypes source directory.
	ArcheTypeDir string
	// Deprecated: Use module mounts.
	// The assets source directory.
	AssetDir string
}

type ConfigNamespace[S, C any] struct {
	// SourceStructure represents the source configuration with any defaults applied.
	// This is used for documentation and printing of the configuration setup to the user.
	SourceStructure any

	// SourceHash is a hash of the source configuration before any defaults gets applied.
	SourceHash string

	// Config is the final configuration as used by Hugo.
	Config C
}

type ContentTypesProvider interface {
	IsContentSuffix(suffix string) bool
	IsContentFile(filename string) bool
	IsIndexContentFile(filename string) bool
	IsHTMLSuffix(suffix string) bool
}

type Headers struct {
	For    string
	Values map[string]any
}

type LoadConfigResult struct {
	Cfg         Provider
	ConfigFiles []string
	BaseConfig  BaseConfig
}

type PageConfig struct {
	// Sort order for Page.Next and Page.Prev. Default "desc" (the default page sort order in Hugo).
	NextPrevSortOrder string

	// Sort order for Page.NextInSection and Page.PrevInSection. Default "desc".
	NextPrevInSectionSortOrder string
}

type Pagination struct {
	//  Default number of elements per pager in pagination.
	PagerSize int

	// The path element used during pagination.
	Path string

	// Whether to disable generation of alias for the first pagination page.
	DisableAliases bool
}

type Provider interface {
	GetString(key string) string
	GetInt(key string) int
	GetBool(key string) bool
	GetParams(key string) maps.Params
	GetStringMap(key string) map[string]any
	GetStringMapString(key string) map[string]string
	GetStringSlice(key string) []string
	Get(key string) any
	Set(key string, value any)
	Keys() []string
	Merge(key string, value any)
	SetDefaults(params maps.Params)
	SetDefaultMergeStrategy()
	WalkParams(walkFn func(params ...maps.KeyParams) bool)
	IsSet(key string) bool
}

type Redirect struct {
	// From is the Glob pattern to match.
	// One of From or FromRe must be set.
	From string

	// FromRe is the regexp to match.
	// This regexp can contain group matches (e.g. $1) that can be used in the To field.
	// One of From or FromRe must be set.
	FromRe string

	// To is the target URL.
	To string

	// Headers to match for the redirect.
	// This maps the HTTP header name to a Glob pattern with values to match.
	// If the map is empty, the redirect will always be triggered.
	FromHeaders map[string]string

	// HTTP status code to use for the redirect.
	// A status code of 200 will trigger a URL rewrite.
	Status int

	// Forcode redirect, even if original request path exists.
	Force bool
}

type Server struct {
	Headers   []Headers
	Redirects []Redirect
	// contains filtered or unexported fields
}

type SitemapConfig struct {
	// The page change frequency.
	ChangeFreq string
	// The priority of the page.
	Priority float64
	// The sitemap filename.
	Filename string
	// Whether to disable page inclusion.
	Disable bool
}