package jsonutil

import "testing"

func TestStringFromAny(t *testing.T) {
	tests := []struct {
		name string
		in   any
		want string
	}{
		{"string", "hi", "hi"},
		{"int", 7, "7"},
		{"int64", int64(8), "8"},
		{"float whole", float64(9), "9"},
		{"float fractional", 44.1, "44.1"},
		{"float no trailing zeroes", float64(100), "100"},
		{"nil", nil, ""},
		{"bool unsupported", true, ""},
		{"map unsupported", map[string]any{}, ""},
	}
	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			if got := StringFromAny(tc.in); got != tc.want {
				t.Fatalf("StringFromAny(%#v) = %q, want %q", tc.in, got, tc.want)
			}
		})
	}
}

func TestIntFromAny(t *testing.T) {
	tests := []struct {
		in   any
		want int
	}{
		{5, 5},
		{int32(6), 6},
		{int64(7), 7},
		{8.9, 8},
		{"10", 10},
		{"  11  ", 11},
		{"not a number", 0},
		{nil, 0},
		{true, 0},
	}
	for _, tc := range tests {
		if got := IntFromAny(tc.in); got != tc.want {
			t.Errorf("IntFromAny(%#v) = %d, want %d", tc.in, got, tc.want)
		}
	}
}

func TestFloatFromAny(t *testing.T) {
	tests := []struct {
		in   any
		want float64
	}{
		{1.5, 1.5},
		{2, 2},
		{int64(3), 3},
		{"4.5", 0}, // strings are deliberately not parsed here
		{nil, 0},
	}
	for _, tc := range tests {
		if got := FloatFromAny(tc.in); got != tc.want {
			t.Errorf("FloatFromAny(%#v) = %v, want %v", tc.in, got, tc.want)
		}
	}
}

func TestBoolFromAny(t *testing.T) {
	tests := []struct {
		in   any
		want bool
	}{
		{true, true},
		{false, false},
		{"true", true},
		{"TRUE", true},
		{" yes ", true},
		{"1", true},
		{"0", false},
		{"no", false},
		{1, true},
		{0, false},
		{int64(2), true},
		{0.0, false},
		{1.5, true},
		{nil, false},
	}
	for _, tc := range tests {
		if got := BoolFromAny(tc.in); got != tc.want {
			t.Errorf("BoolFromAny(%#v) = %v, want %v", tc.in, got, tc.want)
		}
	}
}

func TestFirstNonEmpty(t *testing.T) {
	if got := FirstNonEmpty("", "  ", "found", "later"); got != "found" {
		t.Errorf("got %q", got)
	}
	if got := FirstNonEmpty("  trimmed  "); got != "trimmed" {
		t.Errorf("got %q, want trimmed", got)
	}
	if got := FirstNonEmpty("", "   "); got != "" {
		t.Errorf("got %q, want empty", got)
	}
	if got := FirstNonEmpty(); got != "" {
		t.Errorf("got %q, want empty", got)
	}
}

func TestNestedMap(t *testing.T) {
	m := map[string]any{"album": map[string]any{"title": "X"}, "n": 1}
	if got := NestedMap(m, "album")["title"]; got != "X" {
		t.Errorf("got %v", got)
	}
	if got := NestedMap(m, "missing"); len(got) != 0 {
		t.Errorf("missing key should give empty map, got %v", got)
	}
	if got := NestedMap(m, "n"); len(got) != 0 {
		t.Errorf("non-map value should give empty map, got %v", got)
	}
}

func TestNestedAnyAndString(t *testing.T) {
	m := map[string]any{
		"album": map[string]any{
			"artist": map[string]any{"name": "Nina Simone", "id": float64(42)},
		},
	}
	if got := NestedString(m, "album", "artist", "name"); got != "Nina Simone" {
		t.Errorf("got %q", got)
	}
	if got := NestedString(m, "album", "artist", "id"); got != "42" {
		t.Errorf("numeric id = %q, want 42", got)
	}
	if got := NestedString(m, "album", "nope", "name"); got != "" {
		t.Errorf("missing path = %q, want empty", got)
	}
	if got := NestedAny(m, "album", "artist", "name"); got != "Nina Simone" {
		t.Errorf("got %v", got)
	}
	if got := NestedAny(m); got == nil {
		t.Error("no keys should return the map itself")
	}
	// Traversing through a non-map must not panic.
	if got := NestedAny(m, "album", "artist", "name", "deeper"); got != nil {
		t.Errorf("over-deep path = %v, want nil", got)
	}
}

func TestTitleCase(t *testing.T) {
	tests := []struct{ in, want string }{
		{"qobuz", "Qobuz"},
		{"Tidal", "Tidal"},
		{"", ""},
		{"1st", "1st"},
		{"ä", "ä"}, // only ASCII is uppercased
	}
	for _, tc := range tests {
		if got := TitleCase(tc.in); got != tc.want {
			t.Errorf("TitleCase(%q) = %q, want %q", tc.in, got, tc.want)
		}
	}
}

func TestDisplayArtistNames(t *testing.T) {
	tests := []struct {
		in   []string
		want string
	}{
		{nil, ""},
		{[]string{}, ""},
		{[]string{"A"}, "A"},
		{[]string{"A", "B"}, "A & B"},
		{[]string{"A", "B", "C"}, "A, B & C"},
		{[]string{"A", "B", "C", "D"}, "A, B, C & D"},
	}
	for _, tc := range tests {
		if got := DisplayArtistNames(tc.in); got != tc.want {
			t.Errorf("DisplayArtistNames(%v) = %q, want %q", tc.in, got, tc.want)
		}
	}
}