package jackbox

import (
	"regexp"
	"strings"
)

// tickerVoteRe matches a ticker symbol (2-4 uppercase alphanumeric chars)
// immediately followed by ++ or --.
var tickerVoteRe = regexp.MustCompile(`(?i)\b([A-Z0-9]{2,4})(\+\+|--)`)

// DetectVote checks if a message contains a vote and returns the vote type
// and optional ticker symbol.
//
// For "thisgame++" / "thisgame--": returns (true, "up"/"down", "")
// For "QPL3++" / "tmp2--":        returns (true, "up"/"down", "QPL3"/"TMP2")
// For non-vote messages:           returns (false, "", "")
func DetectVote(text string) (isVote bool, voteType string, ticker string) {
	lower := strings.ToLower(text)

	if strings.Contains(lower, "thisgame++") {
		return true, "up", ""
	}

	if strings.Contains(lower, "thisgame--") {
		return true, "down", ""
	}

	if m := tickerVoteRe.FindStringSubmatch(text); m != nil {
		sym := strings.ToUpper(m[1])
		if _, ok := LookupTicker(sym); ok {
			if m[2] == "++" {
				return true, "up", sym
			}
			return true, "down", sym
		}
	}

	return false, "", ""
}

// IsRelayedMessage checks if a message is relayed from another chat
// Returns true if the message has [irc] or [kosmi] prefix
func IsRelayedMessage(text string) bool {
	lower := strings.ToLower(text)
	return strings.HasPrefix(lower, "[irc]") || strings.HasPrefix(lower, "[kosmi]")
}