package money

import "testing"

func TestParseYuan(t *testing.T) {
	tests := []struct {
		name  string
		value string
		want  int64
	}{
		{"整数", "100", 10000},
		{"一位小数", "12.3", 1230},
		{"两位小数", "12.34", 1234},
		{"前导零", "0.05", 5},
		{"负金额", "-1.20", -120},
		{"正号", "+0.1", 10},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, err := ParseYuan(tt.value)
			if err != nil {
				t.Fatalf("ParseYuan(%q) error: %v", tt.value, err)
			}
			if got != tt.want {
				t.Fatalf("ParseYuan(%q) = %d, want %d", tt.value, got, tt.want)
			}
		})
	}
}

func TestParseYuanRejectsInvalid(t *testing.T) {
	for _, value := range []string{"", "12.345", "abc", "1.2.3", "1.-2"} {
		if _, err := ParseYuan(value); err == nil {
			t.Fatalf("ParseYuan(%q) 应返回错误", value)
		}
	}
}

func TestFormat(t *testing.T) {
	tests := []struct {
		name string
		cent int64
		want string
	}{
		{"两位小数", 1234, "12.34"},
		{"末尾零", 1230, "12.30"},
		{"五分", 5, "0.05"},
		{"整数", 10000, "100.00"},
		{"负数", -120, "-1.20"},
		{"零值", 0, "0.00"},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := Format(tt.cent); got != tt.want {
				t.Fatalf("Format(%d) = %q, want %q", tt.cent, got, tt.want)
			}
		})
	}
}

func TestFormatWithSymbol(t *testing.T) {
	if got := FormatWithSymbol(1234); got != "¥12.34" {
		t.Fatalf("FormatWithSymbol(1234) = %q", got)
	}
}

func TestMinMaxCent(t *testing.T) {
	if got := MinCent(100, 200); got != 100 {
		t.Fatalf("MinCent = %d", got)
	}
	if got := MaxCent(100, 200); got != 200 {
		t.Fatalf("MaxCent = %d", got)
	}
}