package phone

import "testing"

func TestToLocal(t *testing.T) {
	tests := []struct {
		name    string
		input   string
		want    string
		wantErr bool
	}{
		{"e164 with plus", "+639171234567", "09171234567", false},
		{"e164 without plus", "639171234567", "09171234567", false},
		{"already local", "09171234567", "09171234567", false},
		{"missing leading zero", "9171234567", "09171234567", false},
		{"non-PH number", "+1234567890", "", true},
		{"empty", "", "", true},
		{"with spaces", "+63 917 123 4567", "09171234567", false},
		{"with dashes", "0917-123-4567", "09171234567", false},
		{"too short", "0917", "", true},
		{"too long", "091712345678", "", true},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, err := ToLocal(tt.input)
			if (err != nil) != tt.wantErr {
				t.Errorf("ToLocal(%q) error = %v, wantErr %v", tt.input, err, tt.wantErr)
				return
			}
			if got != tt.want {
				t.Errorf("ToLocal(%q) = %q, want %q", tt.input, got, tt.want)
			}
		})
	}
}

func TestToE164(t *testing.T) {
	tests := []struct {
		name    string
		input   string
		want    string
		wantErr bool
	}{
		{"standard local", "09171234567", "+639171234567", false},
		{"missing leading zero", "9171234567", "+639171234567", false},
		{"already e164", "+639171234567", "+639171234567", false},
		{"e164 without plus", "639171234567", "+639171234567", false},
		{"with spaces", "0917 123 4567", "+639171234567", false},
		{"with dashes", "0917-123-4567", "+639171234567", false},
		{"empty", "", "", true},
		{"too short", "0917", "", true},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, err := ToE164(tt.input)
			if (err != nil) != tt.wantErr {
				t.Errorf("ToE164(%q) error = %v, wantErr %v", tt.input, err, tt.wantErr)
				return
			}
			if got != tt.want {
				t.Errorf("ToE164(%q) = %q, want %q", tt.input, got, tt.want)
			}
		})
	}
}