import XCTest
@testable import iosApp
import ComposeApp

@MainActor
final class DocumentViewModelTests: XCTestCase {
    var sut: DocumentViewModel!

    override func setUp() {
        super.setUp()
        sut = DocumentViewModel()
    }

    override func tearDown() {
        sut = nil
        super.tearDown()
    }

    // MARK: - Initialization Tests

    func testInitialState() {
        // Then
        XCTAssertFalse(sut.isLoading)
        XCTAssertNil(sut.errorMessage)
        XCTAssertTrue(sut.documents.isEmpty)
    }

    // MARK: - Document Loading Tests

    func testLoadDocumentsWithFilters() {
        // When
        sut.loadDocuments(
            residenceId: 1,
            documentType: "warranty",
            isActive: true
        )

        // Then - Should start loading or complete
        XCTAssertTrue(sut.isLoading || sut.errorMessage != nil || !sut.documents.isEmpty || (!sut.isLoading && sut.documents.isEmpty))
    }

    func testLoadDocumentsWithoutFilters() {
        // When
        sut.loadDocuments()

        // Then - Should not crash
        XCTAssertNotNil(sut)
    }

    // MARK: - Document Creation Tests

    func testCreateDocumentWithRequiredFields() {
        // Given
        let expectation = XCTestExpectation(description: "Create document callback")
        var resultSuccess: Bool?
        var resultError: String?

        // When
        sut.createDocument(
            title: "Test Document",
            documentType: "warranty",
            residenceId: 1
        ) { success, error in
            resultSuccess = success
            resultError = error
            expectation.fulfill()
        }

        // Then
        wait(for: [expectation], timeout: 5.0)
        XCTAssertNotNil(resultSuccess)
    }

    func testCreateDocumentWithWarrantyFields() {
        // Given
        let expectation = XCTestExpectation(description: "Create warranty callback")

        // When
        sut.createDocument(
            title: "Test Warranty",
            documentType: "warranty",
            residenceId: 1,
            itemName: "HVAC System",
            provider: "ACME Corp"
        ) { success, error in
            expectation.fulfill()
        }

        // Then
        wait(for: [expectation], timeout: 5.0)
        XCTAssertNotNil(sut)
    }

    // MARK: - Document Update Tests

    func testUpdateDocumentWithValidId() {
        // Given
        let expectation = XCTestExpectation(description: "Update document callback")

        // When
        sut.updateDocument(
            id: 1,
            title: "Updated Title"
        ) { success, error in
            expectation.fulfill()
        }

        // Then
        wait(for: [expectation], timeout: 5.0)
        XCTAssertNotNil(sut)
    }

    // MARK: - Document Deletion Tests

    func testDeleteDocumentWithValidId() {
        // When
        sut.deleteDocument(id: 1)

        // Then - Should not crash
        XCTAssertNotNil(sut)
    }

    // MARK: - State Management Tests

    func testMultipleOperationsDontCrash() {
        // When
        sut.loadDocuments()
        sut.loadDocuments(documentType: "warranty")
        sut.deleteDocument(id: 1)

        // Then - Should not crash
        XCTAssertNotNil(sut)
    }
}