import * as isoly from "isoly"
import * as selectively from "selectively"
import * as model from "@payfunc/model-card"

export type Card = Omit<model.Card, "expires"> & { expires: isoly.Date }
export namespace Card {
	export function is(value: any | Card): value is Card {
		return (
			typeof value == "object" &&
			model.Card.Scheme.is(value.scheme) &&
			typeof value.iin == "string" &&
			value.iin.length == 6 &&
			typeof value.last4 == "string" &&
			value.last4.length == 4 &&
			isoly.Date.is(value.expires) &&
			(value.type == undefined || model.Card.Type.is(value.type)) &&
			(value.csc == undefined || ["matched", "mismatched", "present"].includes(value.csc))
		)
	}
	export function isPartial(value: any | Partial<Card>): value is Partial<Card> {
		return (
			typeof value == "object" &&
			(value.scheme == undefined || model.Card.Scheme.is(value.scheme)) &&
			(value.iin == undefined || (typeof value.iin == "string" && value.iin.length == 6)) &&
			(value.last4 == undefined || (typeof value.last4 == "string" && value.last4.length == 4)) &&
			(value.expires == undefined || isoly.Date.is(value.expires)) &&
			(value.type == undefined || model.Card.Type.is(value.type)) &&
			(value.csc == undefined || ["matched", "mismatched", "present"].includes(value.csc))
		)
	}
	export function from(card: model.Card.Creatable | model.Card.Creatable.Safe): Card & { csc?: "present" }
	export function from(card: model.Card): Card
	export function from(card: model.Card.Creatable | model.Card.Creatable.Safe | model.Card): Card {
		return {
			...(model.Card.Creatable.is(card) ? model.Card.from(card) : card),
			expires:
				(2000 + card.expires[1]).toString() +
				"-" +
				card.expires[0].toString().padStart(2, "0") +
				"-" +
				lastDayOfMonth(2000 + card.expires[1], card.expires[0]),
		}
	}
	function lastDayOfMonth(year: number, month: number): "28" | "29" | "30" | "31" {
		let result: "28" | "29" | "30" | "31"
		switch (month) {
			case 1:
			case 3:
			case 5:
			case 7:
			case 8:
			case 10:
			case 12:
			default:
				result = "31"
				break
			case 4:
			case 6:
			case 9:
			case 11:
				result = "30"
				break
			case 2:
				result = year % 4 == 0 ? "29" : "28"
				break
		}
		return result
	}
	export const template = new selectively.Type.Object({
		scheme: new selectively.Type.Union([
			new selectively.Type.String("unknown"),
			new selectively.Type.String("amex"),
			new selectively.Type.String("dankort"),
			new selectively.Type.String("diners"),
			new selectively.Type.String("discover"),
			new selectively.Type.String("electron"),
			new selectively.Type.String("interpayment"),
			new selectively.Type.String("jcb"),
			new selectively.Type.String("maestro"),
			new selectively.Type.String("mastercard"),
			new selectively.Type.String("unionpay"),
			new selectively.Type.String("visa"),
		]),
		iin: new selectively.Type.String(),
		last4: new selectively.Type.String(),
		expires: new selectively.Type.String(),
		type: new selectively.Type.Union([new selectively.Type.String("debit"), new selectively.Type.String("credit")]),
		csc: new selectively.Type.Union([
			new selectively.Type.String("matched"),
			new selectively.Type.String("mismatched"),
			new selectively.Type.String("present"),
		]),
	})
}