package coin

import (
	"math"
	"testing"
)

func TestFormatCompactUSD(t *testing.T) {
	tests := []struct {
		in   float64
		want string
	}{
		{0, "0.00"},
		{999.99, "999.99"},
		{999.994, "999.99"},
		{999.999, "1k"},
		{1_000, "1k"},
		{25_350, "25.35k"},
		{25_351, "25.351k"},
		{999_499, "999.499k"},
		{999_999.4, "999.999k"},
		{999_999.5, "1M"},
		{1_000_000, "1M"},
		{1_234_000, "1.234M"},
		{126_000_000, "126M"},
		{999_999_999.5, "1B"},
		{1_250_000_000, "1.25B"},
		{999_999_999_999.5, "1T"},
		{1_000_000_000_000, "1T"},
		{-25_350, "-25.35k"},
		{-999.999, "-1k"},
		{-1_250_000_000, "-1.25B"},
		{math.NaN(), "invalid USD"},
		{math.Inf(1), "invalid USD"},
	}
	for _, test := range tests {
		if got := formatCompactUSD(test.in); got != test.want {
			t.Errorf("formatCompactUSD(%v): got %q, want %q", test.in, got, test.want)
		}
	}
}

func TestFormatPortfolioPositionPnLUSDSplitsAmountAndPercentage(t *testing.T) {
	tests := []struct {
		current  float64
		invested float64
		amount   string
		percent  string
	}{
		{1_250_000, 1_000_000, "+250k", "+25.00%"},
		{750_000, 1_000_000, "-250k", "-25.00%"},
	}
	for _, test := range tests {
		amount, percent := formatPortfolioPositionPnLUSD(test.current, test.invested)
		if amount != test.amount || percent != test.percent {
			t.Errorf("formatPortfolioPositionPnLUSD(%v, %v): got (%q, %q), want (%q, %q)", test.current, test.invested, amount, percent, test.amount, test.percent)
		}
	}
}

func TestExportedUSDFormattersRemainFullPrecision(t *testing.T) {
	if got, want := FormatUSD(1_234_567.89), "$1,234,567.89"; got != want {
		t.Fatalf("FormatUSD: got %q, want %q", got, want)
	}
	if got, want := FormatPnLUSD(1_250_000, 1_000_000), "+$250,000.00 (+25.00%)"; got != want {
		t.Fatalf("FormatPnLUSD: got %q, want %q", got, want)
	}
}