import Foundation
import Testing
@testable import LocalData

@Suite struct FileStorageHelperTests {
    private let helper = FileStorageHelper.shared

    @Test func documentsDirectoryRoundTrip() async throws {
        let fileName = "test_file_\(UUID().uuidString).data"
        let data = Data("file-content".utf8)
        
        try await helper.write(data, to: .documents, fileName: fileName)
        
        let exists = await helper.exists(in: .documents, fileName: fileName)
        #expect(exists == true)
        
        let retrieved = try await helper.read(from: .documents, fileName: fileName)
        #expect(retrieved == data)
        
        let size = try await helper.size(of: .documents, fileName: fileName)
        #expect(size == Int64(data.count))
        
        let list = try await helper.list(in: .documents)
        #expect(list.contains(fileName))
        
        try await helper.delete(from: .documents, fileName: fileName)
        let afterDelete = await helper.exists(in: .documents, fileName: fileName)
        #expect(afterDelete == false)
    }

    @Test func customDirectoryCreation() async throws {
        let tempDir = FileManager.default.temporaryDirectory.appending(path: UUID().uuidString)
        let fileName = "custom.txt"
        let data = Data("custom".utf8)
        
        try await helper.write(data, to: .custom(tempDir), fileName: fileName)
        
        let retrieved = try await helper.read(from: .custom(tempDir), fileName: fileName)
        #expect(retrieved == data)
        
        // Cleanup
        try? FileManager.default.removeItem(at: tempDir)
    }
    
    @Test func readNonExistentFileReturnsNil() async throws {
        let result = try await helper.read(from: .caches, fileName: "nonexistent_\(UUID().uuidString)")
        #expect(result == nil)
    }
}