import { S3StorageAdapter } from '@/lib/storage/storage.adapter';
import {
    DeleteObjectCommand,
    PutObjectCommand,
    S3Client,
} from '@aws-sdk/client-s3';
import { mockClient } from 'aws-sdk-client-mock';

describe('S3StorageAdapter', () => {
    let s3Mock: ReturnType<typeof mockClient>;
    let mockS3Client: S3Client;
    let adapter: S3StorageAdapter;

    beforeEach(() => {
        s3Mock = mockClient(S3Client);
        mockS3Client = new S3Client({ region: 'us-east-1' });
        adapter = new S3StorageAdapter(
            'test-bucket',
            'us-east-1',
            mockS3Client
        );
    });

    afterEach(() => {
        s3Mock.restore();
    });

    describe('put', () => {
        it('should upload file to S3 with correct parameters', async () => {
            const key = 'test-image.jpg';
            const fileContent = 'test file content';
            const file = Buffer.from(fileContent);

            s3Mock.on(PutObjectCommand).resolves({});

            await adapter.put(key, file, 'image/jpeg');

            expect(s3Mock.call(0).args[0]).toBeInstanceOf(PutObjectCommand);
            const command = s3Mock.call(0).args[0] as PutObjectCommand;
            expect(command.input.Bucket).toBe('test-bucket');
            expect(command.input.Key).toBe(key);
            expect(command.input.ContentType).toBe('image/jpeg');
        });

        it('should return StorageResult with s3 type', async () => {
            const key = 'test-image.jpg';
            const file = Buffer.from('test file content');

            s3Mock.on(PutObjectCommand).resolves({});

            const result = await adapter.put(key, file, 'image/jpeg');

            expect(result).toEqual({
                type: 's3',
                provider: 'aws-s3',
                key,
                publicUrl: `https://test-bucket.s3.us-east-1.amazonaws.com/${key}`,
            });
        });

        it('should return correct public URL with different regions', async () => {
            const adapter2 = new S3StorageAdapter(
                'my-bucket',
                'eu-west-1',
                mockS3Client
            );
            const key = 'my-image.png';
            const file = Buffer.from('test');

            s3Mock.on(PutObjectCommand).resolves({});

            const result = await adapter2.put(key, file, 'image/png');

            expect(result.publicUrl).toBe(
                `https://my-bucket.s3.eu-west-1.amazonaws.com/${key}`
            );
        });

        it('should handle Blob input', async () => {
            const key = 'test-blob.jpg';
            const fileContent = 'blob content';
            const blob = new Blob([fileContent], { type: 'image/jpeg' });

            s3Mock.on(PutObjectCommand).resolves({});

            const result = await adapter.put(key, blob, 'image/jpeg');

            expect(result.type).toBe('s3');
            expect(result.key).toBe(key);
        });

        it('should handle nested keys', async () => {
            const key = 'articles/2026/04/image.jpg';
            const file = Buffer.from('test');

            s3Mock.on(PutObjectCommand).resolves({});

            const result = await adapter.put(key, file, 'image/jpeg');

            expect(result.key).toBe(key);
            expect(result.publicUrl).toBe(
                `https://test-bucket.s3.us-east-1.amazonaws.com/${key}`
            );
        });
    });

    describe('delete', () => {
        it('should delete object from S3 with correct parameters', async () => {
            const key = 'test-image.jpg';

            s3Mock.on(DeleteObjectCommand).resolves({});

            await adapter.delete(key);

            expect(s3Mock.call(0).args[0]).toBeInstanceOf(DeleteObjectCommand);
            const command = s3Mock.call(0).args[0] as DeleteObjectCommand;
            expect(command.input.Bucket).toBe('test-bucket');
            expect(command.input.Key).toBe(key);
        });

        it('should not throw error if deletion fails', async () => {
            const key = 'test-image.jpg';

            s3Mock.on(DeleteObjectCommand).rejects(new Error('S3 error'));

            // Should not throw
            expect(async () => {
                await adapter.delete(key);
            }).not.toThrow();
        });

        it('should handle nested keys', async () => {
            const key = 'articles/2026/04/image.jpg';

            s3Mock.on(DeleteObjectCommand).resolves({});

            await adapter.delete(key);

            const command = s3Mock.call(0).args[0] as DeleteObjectCommand;
            expect(command.input.Key).toBe(key);
        });
    });
});