package text

import (
	"fmt"
	"runtime"
	"slices"
	"strings"
)

type Key string

const FlashPrefix = "flash."

type entry struct {
	text string
	site string
}

var catalog = map[Key]entry{}

func Register(entries map[Key]string) bool {
	_, file, line, _ := runtime.Caller(1)
	site := fmt.Sprintf("%s:%d", file, line)
	for k, v := range entries {
		if prev, ok := catalog[k]; ok {
			panic(fmt.Sprintf("duplicate catalog key %q registered at %s and %s", k, prev.site, site))
		}
		catalog[k] = entry{text: v, site: site}
	}
	return true
}

func Lookup(k Key) (string, bool) {
	e, ok := catalog[k]
	return e.text, ok
}

func Keys() []Key {
	keys := make([]Key, 0, len(catalog))
	for k := range catalog {
		keys = append(keys, k)
	}
	slices.Sort(keys)
	return keys
}

func (k Key) IsFlash() bool {
	return strings.HasPrefix(string(k), FlashPrefix)
}