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Extends supabase-kt with a Postgrest Client

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package io.github.jan.supabase.postgrest.query

import io.github.jan.supabase.postgrest.classPropertyNames
import kotlin.jvm.JvmInline

/**
 * Represents a list of columns to select
 * @param value The columns to select, separated by a comma
 */
@JvmInline
value class Columns @PublishedApi internal constructor(val value: String) {

    companion object {

        /**
         * Select all columns
         */
        val ALL = Columns("*")

        /**
         * Select all columns given in the [value] parameter
         * @param value The columns to select, separated by a comma
         */
        fun raw(value: String) = Columns(value.clean())

        /**
         * Select all columns given in the [columns] parameter
         * @param columns The columns to select
         */
        fun list(vararg columns: String) = Columns(columns.joinToString(","))

        /**
         * Select all columns given in the [columns] parameter
         * @param columns The columns to select
         */
        fun list(columns: List) = Columns(columns.joinToString(","))

        /**
         * Select all columns of type [T]'s class properties. Example: If you specify a class 'User' with the fields 'id' and 'name', this will select 'id,name'
         * @param T The type of the columns to select
         */
        inline fun  type() = list(classPropertyNames())

        private fun String.clean(): String {
            var quoted = false
            val regex = Regex("\\s")
            return this.map {
                if (it == '"') {
                    quoted = !quoted
                }
                if (regex.matches(it.toString()) && !quoted) {
                    ""
                } else {
                    it
                }
            }.joinToString("")
        }

    }

}