package config

import (
	"net/url"
	"strings"
)

type Config struct {
	Core     CoreConfig     `toml:"core"`
	Web      WebConfig      `toml:"web"`
	Security SecurityConfig `toml:"security"`
}

type WebConfig struct {
	// Domain should be the instance's full domain, including https:// but without the trailing slash.
	Domain string `toml:"domain"`
	// WebFingerDomain should be the instance's WebFinger domain, used for usernames.
	// .well-known/webfinger *must* listen on this domain.
	// It should only be the bare domain, i.e. `mercury.localhost`
	WebFingerDomain string `toml:"webfinger_domain"`

	// Port is the port the server should listen on.
	Port int `toml:"port"`
}

// WebFingerDomains returns the domains valid for WebFinger requests.
// The first one is always the canonical domain.
// This function is guaranteed to return at least one domain.
func (c WebConfig) WebFingerDomains() []string {
	domains := make([]string, 0, 2)

	if c.WebFingerDomain != "" {
		domains = append(domains, c.WebFingerDomain)
	}

	u, err := url.Parse(c.Domain)
	if err != nil {
		return append(domains, strings.TrimPrefix(
			strings.TrimPrefix(c.Domain, "http://"), "https://"))
	}

	return append(domains, u.Host)
}

type CoreConfig struct {
	Postgres  string `toml:"postgres"`
	Dev       bool   `toml:"dev"`
	SecretKey string `toml:"secret_key"`
}

type SecurityConfig struct {
	RestrictAPI     bool `toml:"restrict_api"`
	PublicTimelines bool `toml:"public_timelines"`
}