package lang_test

import (
	"testing"

	"github.com/juanatsap/cv-site/internal/lang"
)

func TestIsValid(t *testing.T) {
	tests := []struct {
		name     string
		language string
		want     bool
	}{
		{
			name:     "Valid - English",
			language: "en",
			want:     true,
		},
		{
			name:     "Valid - Spanish",
			language: "es",
			want:     true,
		},
		{
			name:     "Invalid - French",
			language: "fr",
			want:     false,
		},
		{
			name:     "Invalid - Empty",
			language: "",
			want:     false,
		},
		{
			name:     "Invalid - Uppercase",
			language: "EN",
			want:     false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := lang.IsValid(tt.language); got != tt.want {
				t.Errorf("IsValid() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestValidate(t *testing.T) {
	tests := []struct {
		name     string
		language string
		wantErr  bool
	}{
		{
			name:     "Valid - English",
			language: "en",
			wantErr:  false,
		},
		{
			name:     "Valid - Spanish",
			language: "es",
			wantErr:  false,
		},
		{
			name:     "Invalid - French",
			language: "fr",
			wantErr:  true,
		},
		{
			name:     "Invalid - Empty",
			language: "",
			wantErr:  true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := lang.Validate(tt.language)
			if (err != nil) != tt.wantErr {
				t.Errorf("Validate() error = %v, wantErr %v", err, tt.wantErr)
			}
			if err != nil && tt.wantErr {
				// Check that error message includes supported languages
				errMsg := err.Error()
				if errMsg == "" {
					t.Error("Validate() error message is empty")
				}
			}
		})
	}
}

func TestAll(t *testing.T) {
	all := lang.All()

	if len(all) != 2 {
		t.Errorf("All() returned %d languages, want 2", len(all))
	}

	// Check that it contains en and es
	hasEN := false
	hasES := false
	for _, l := range all {
		if l == "en" {
			hasEN = true
		}
		if l == "es" {
			hasES = true
		}
	}

	if !hasEN {
		t.Error("All() missing 'en'")
	}
	if !hasES {
		t.Error("All() missing 'es'")
	}
}