package postgres

import "strings"

// TSQueryFromSearch generates a TS query from a typical search string.
func TSQueryFromSearch(search string) string {
	if strings.HasPrefix(search, "tsq:") {
		return search[4:]
	}

	tokens := strings.Split(search, " ")
	inQuotes := false
	result := ""

	for i, token := range tokens {
		clearQuotes := false
		startQuotes := false

		if strings.HasPrefix(token, "\"") {
			if len(token) > 1 {
				token = token[1:]
			}
			startQuotes = true
		}
		if strings.HasSuffix(token, "\"") {
			token = token[:len(token)-1]
			startQuotes = false
			clearQuotes = true
		}

		token := strings.Trim(token, ",.;:()\"")
		if len(token) > 0 {
			if startQuotes {
				if i > 0 {
					result += " & "
				}

				result += "("
			} else if inQuotes {
				result += "<->"
			} else if i != 0 {
				result += " & "
			}

			result += token
		}

		if startQuotes {
			inQuotes = true
		}
		if clearQuotes {
			inQuotes = false
			result += ")"
		}
	}

	if inQuotes {
		return result
	}

	return strings.TrimLeft(result, " ")
}