package analyzer

import (
	"testing"
)

func TestRounded(t *testing.T) {
	type args struct {
		num    Amount
		places int
	}
	tests := []struct {
		name string
		args args
		want Amount
	}{
		{
			name: "zero",
			args: args{num: 0.0, places: 2},
			want: 0.0,
		},
		{
			name: "negative",
			args: args{num: -30.1, places: 2},
			want: -30.1,
		},
		{
			name: "long",
			args: args{num: 500.123456789, places: 3},
			want: 500.123,
		},
		{
			name: "short",
			args: args{num: 500.523456789, places: 1},
			want: 500.5,
		},
		{
			name: "money",
			args: args{num: 3.50, places: 2},
			want: 3.50,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := tt.args.num.Rounded(tt.args.places); got != tt.want {
				t.Errorf("Rounded() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestFormatUSD(t *testing.T) {
	type args struct {
		dollars Amount
	}
	tests := []struct {
		name string
		args args
		want string
	}{
		{
			name: "zero",
			args: args{dollars: 0.0},
			want: "$0.00",
		},
		{
			name: "positive",
			args: args{dollars: 13.35423},
			want: "$13.35",
		},
		{
			name: "negative",
			args: args{dollars: -28.44},
			want: "-$28.44",
		},
		{
			name: "large",
			args: args{dollars: 56000.03},
			want: "$56,000.03",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := tt.args.dollars.FormatUSD(); got != tt.want {
				t.Errorf("FormatUSD() = %q, want %q", got, tt.want)
			}
		})
	}
}

func TestAmountAbsoluteValue(t *testing.T) {
	cases := map[string]struct {
		input Amount
		want  Amount
	}{
		"zero": {
			input: Amount(0.0),
			want:  Amount(0.0),
		},
		"positive unchanged": {
			input: Amount(1.0),
			want:  Amount(1.0),
		},
		"negative unchanged": {
			input: Amount(-0.000001),
			want:  Amount(0.000001),
		},
	}

	for name, td := range cases {
		tt := td // go bug through 1.21+ requires allocating a new variable or setting a go env for experimental features as of go 1.20 (1.21?)
		t.Run(name, func(t *testing.T) {
			got := tt.input.AbsoluteValue()
			if got != tt.want {
				t.Errorf("got \n\t%v, want\n\t%v", got, tt.want)
			}
		})
	}
}