package domain

import (
	"encoding/hex"
	"testing"
	"time"
)

func TestSharedLinkBeforeCreate(t *testing.T) {
	t.Run("generates id and token when missing", func(t *testing.T) {
		link := SharedLink{}

		if err := link.BeforeCreate(nil); err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		if link.ID == "" {
			t.Fatalf("expected generated id")
		}
		if len(link.Token) != 64 {
			t.Fatalf("expected 64-character token, got %q", link.Token)
		}
		if _, err := hex.DecodeString(link.Token); err != nil {
			t.Fatalf("expected hex token: %v", err)
		}
	})

	t.Run("preserves existing id and token", func(t *testing.T) {
		link := SharedLink{
			ID:    "existing-id",
			Token: "existing-token",
		}

		if err := link.BeforeCreate(nil); err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		if link.ID != "existing-id" || link.Token != "existing-token" {
			t.Fatalf("expected existing fields to be preserved: %#v", link)
		}
	})
}

func TestSharedLinkIsValid(t *testing.T) {
	future := time.Now().Add(time.Hour)
	past := time.Now().Add(-time.Hour)

	tests := []struct {
		name     string
		link     SharedLink
		expected bool
	}{
		{
			name:     "active link without expiration is valid",
			link:     SharedLink{IsActive: true},
			expected: true,
		},
		{
			name:     "active link with future expiration is valid",
			link:     SharedLink{IsActive: true, ExpiresAt: &future},
			expected: true,
		},
		{
			name:     "inactive link is invalid",
			link:     SharedLink{IsActive: false, ExpiresAt: &future},
			expected: false,
		},
		{
			name:     "expired link is invalid",
			link:     SharedLink{IsActive: true, ExpiresAt: &past},
			expected: false,
		},
	}

	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			if got := tc.link.IsValid(); got != tc.expected {
				t.Fatalf("unexpected validity: got=%v expected=%v", got, tc.expected)
			}
		})
	}
}