package web

import (
	"strings"
	"testing"
)

func TestQRBuildSPD(t *testing.T) {
	const def = "2702008874/2010"

	cases := []struct {
		name    string
		account string
		amount  string
		message string
		want    string
	}{
		{
			name:    "czech account",
			account: "2702008874/2010",
			amount:  "700",
			message: "Test Member: 01/2026",
			want:    "SPD*1.0*ACC:2702008874*BC:2010*AM:700.00*CC:CZK*MSG:Test Member: 01/2026",
		},
		{
			name:    "IBAN account",
			account: "CZ6508000000192000145399",
			amount:  "500",
			message: "hi",
			want:    "SPD*1.0*ACC:CZ6508000000192000145399*AM:500.00*CC:CZK*MSG:hi",
		},
		{
			name:    "invalid account falls back to default",
			account: "NOTANACCOUNT",
			amount:  "100",
			message: "x",
			want:    "SPD*1.0*ACC:2702008874*BC:2010*AM:100.00*CC:CZK*MSG:x",
		},
		{
			name:    "empty account falls back to default",
			account: "",
			amount:  "0",
			message: "",
			want:    "SPD*1.0*ACC:2702008874*BC:2010*AM:0.00*CC:CZK*MSG:",
		},
		{
			name:    "negative amount clamped to 0.00",
			account: def,
			amount:  "-1",
			message: "",
			want:    "SPD*1.0*ACC:2702008874*BC:2010*AM:0.00*CC:CZK*MSG:",
		},
		{
			name:    "amount over 10M clamped to 0.00",
			account: def,
			amount:  "99999999",
			message: "",
			want:    "SPD*1.0*ACC:2702008874*BC:2010*AM:0.00*CC:CZK*MSG:",
		},
		{
			name:    "non-numeric amount becomes 0.00",
			account: def,
			amount:  "abc",
			message: "",
			want:    "SPD*1.0*ACC:2702008874*BC:2010*AM:0.00*CC:CZK*MSG:",
		},
		{
			name:    "asterisks stripped from message",
			account: def,
			amount:  "100",
			message: "pay*now",
			want:    "SPD*1.0*ACC:2702008874*BC:2010*AM:100.00*CC:CZK*MSG:paynow",
		},
		{
			name:    "message truncated to 60 runes",
			account: def,
			amount:  "0",
			message: strings.Repeat("á", 65),
			want:    "SPD*1.0*ACC:2702008874*BC:2010*AM:0.00*CC:CZK*MSG:" + strings.Repeat("á", 60),
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got := BuildSPD(tc.account, tc.amount, tc.message, def)
			if got != tc.want {
				t.Errorf("\ngot:  %s\nwant: %s", got, tc.want)
			}
		})
	}
}