package models

// The settings keys of the five priority tiers, in the order PHP checked
// them. A tier rule names one of them.
const (
	PriorityHomepage   = "priority_homepage"
	PriorityServices   = "priority_services"
	PriorityBlog       = "priority_blog"
	PriorityCategories = "priority_categories"
	PriorityLegal      = "priority_legal"
)

// PriorityDefaults are the PHP defaults of the priority settings.
var PriorityDefaults = map[string]string{
	PriorityHomepage:   "1.0",
	PriorityServices:   "0.8",
	PriorityBlog:       "0.6",
	PriorityCategories: "0.4",
	PriorityLegal:      "0.2",
}

// Settings is the sitemap settings singleton (row id 1) on
// golem15_sitemap_settings, the PHP Golem15\Sitemap\Models\Settings that
// WinterCMS kept in system_settings under golem15_sitemap_settings.
// FrontendURL replaces the backend URL in the generated XML;
// FrontendDefaultLocale is the locale whose URLs carry no prefix;
// UpdatesManifestPath names a JSON file of URL path to last-modified date;
// EnablePriorityTiers turns the tier priorities on, and the priority fields
// hold each tier's value as text. A null priority reads as its PHP default.
type Settings struct {
	ID                    uint    `gorm:"column:id;primaryKey"`
	FrontendURL           *string `gorm:"column:frontend_url"`
	FrontendDefaultLocale *string `gorm:"column:frontend_default_locale"`
	UpdatesManifestPath   *string `gorm:"column:updates_manifest_path"`
	EnablePriorityTiers   bool    `gorm:"column:enable_priority_tiers"`
	PriorityHomepage      *string `gorm:"column:priority_homepage"`
	PriorityServices      *string `gorm:"column:priority_services"`
	PriorityBlog          *string `gorm:"column:priority_blog"`
	PriorityCategories    *string `gorm:"column:priority_categories"`
	PriorityLegal         *string `gorm:"column:priority_legal"`
}

func (Settings) TableName() string { return "golem15_sitemap_settings" }

// Fillable lists only the settings columns.
func (Settings) Fillable() []string {
	return []string{
		"frontend_url", "frontend_default_locale", "updates_manifest_path",
		"enable_priority_tiers", PriorityHomepage, PriorityServices,
		PriorityBlog, PriorityCategories, PriorityLegal,
	}
}

// Rules is empty: the PHP settings form validated nothing.
func (Settings) Rules() map[string]string { return map[string]string{} }

// DefaultSettings is the settings PHP read when nothing was saved: tiers on
// with the default priorities.
func DefaultSettings() Settings {
	return Settings{ID: 1, EnablePriorityTiers: true}
}

// Priority returns the value of a priority setting: the stored text, or the
// PHP default when it is null.
func (s Settings) Priority(key string) string {
	var p *string
	switch key {
	case PriorityHomepage:
		p = s.PriorityHomepage
	case PriorityServices:
		p = s.PriorityServices
	case PriorityBlog:
		p = s.PriorityBlog
	case PriorityCategories:
		p = s.PriorityCategories
	case PriorityLegal:
		p = s.PriorityLegal
	}
	if p == nil {
		return PriorityDefaults[key]
	}
	return *p
}

func init() {
	Register(Settings{})
}