package configloader

import _ "embed"

import (
    "encoding/json"
    "errors"
    "slices"
)

type ParserListItem struct {
    Title string `json:"title"`
    Comment string `json:"comment"`
    Authors []string `json:"authors"`
    Links []string  `json:"links"`
}

// Load parser list from JSON retrieved from musdb's API
// See https://<subdomain>.museum-digital.org/musdb/api/meta/list_import_parsers
// The embed module requires the variable to not be bound to a function.

//go:embed parser_list.json
var rawParserList []byte

// Returns a list of the available parsers.
func ListParsers() []ParserListItem {

    parserListFromApi := []ParserListItem{}
    // parserListFromApi := new(ApiParserListFormat)
    json.Unmarshal(rawParserList, &parserListFromApi)

    return parserListFromApi

}

// Checks if inputParser is in the list of available parsers.
// Returns the parser name or an error.
func ValidateParser(inputParser string) (string, error) {

    parserList := ListParsers()
    parserTitles := []string{}

    for _, p := range(parserList) {
        parserTitles = append(parserTitles, p.Title)
    }

    if slices.Contains(parserTitles, inputParser) {
        return inputParser, nil
    }

    // Accepted invalid modes to clean up:
    // ParserLido > Lido
    // lido > Lido
    cleaned := inputParser[6:]
    if slices.Contains(parserTitles, cleaned) {
        return cleaned, nil
    }

    return "", errors.New("Invalid parser selected")

}