import XCTest
@testable import IYmtg_App_iOS // Ensure this matches your Target name

final class IYmtgTests: XCTestCase {

    // MARK: - Card Model Tests
    
    func testSavedCardInitialization() {
        let uuid = UUID()
        let metadata = CardMetadata(
            id: uuid,
            name: "Black Lotus",
            setCode: "LEA",
            collectorNumber: "232",
            hasFoilPrinting: false,
            hasSerializedPrinting: false,
            priceScanned: 10000.0,
            rarity: "rare",
            colorIdentity: ["U"],
            isSerialized: false
        )
        
        let savedCard = SavedCard(from: metadata, imageName: "test_image.jpg", collection: "My Binder", location: "Page 1")
        
        XCTAssertEqual(savedCard.name, "Black Lotus")
        XCTAssertEqual(savedCard.setCode, "LEA")
        XCTAssertEqual(savedCard.collectorNumber, "232")
        XCTAssertEqual(savedCard.scryfallID, "LEA-232")
        XCTAssertEqual(savedCard.collectionName, "My Binder")
        XCTAssertEqual(savedCard.storageLocation, "Page 1")
        XCTAssertEqual(savedCard.currentValuation, 10000.0)
        XCTAssertEqual(savedCard.condition, "Near Mint (NM)") // Default
        XCTAssertEqual(savedCard.foilType, "None") // Default
    }

    // MARK: - Condition Engine Tests
    
    func testConditionGradingLogic() {
        // Mock Damage Observations
        let criticalDamage = DamageObservation(type: "Rips", rect: .zero, confidence: 0.9)
        let minorDamage1 = DamageObservation(type: "EdgeWear", rect: .zero, confidence: 0.8)
        let minorDamage2 = DamageObservation(type: "Scratch", rect: .zero, confidence: 0.8)
        let minorDamage3 = DamageObservation(type: "Dent", rect: .zero, confidence: 0.8)
        
        // 1. Excellent (1-2 minor damages)
        XCTAssertEqual(ConditionEngine.overallGrade(damages: [minorDamage1]), "Excellent (EX)")
        XCTAssertEqual(ConditionEngine.overallGrade(damages: [minorDamage1, minorDamage2]), "Excellent (EX)")
        
        // 2. Played (>2 minor damages)
        XCTAssertEqual(ConditionEngine.overallGrade(damages: [minorDamage1, minorDamage2, minorDamage3]), "Played (PL)")
        
        // 3. Damaged (Any critical damage)
        XCTAssertEqual(ConditionEngine.overallGrade(damages: [criticalDamage]), "Damaged")
        XCTAssertEqual(ConditionEngine.overallGrade(damages: [minorDamage1, criticalDamage]), "Damaged")
        
        // 4. Ungraded (Empty list + No Model loaded in Test Env)
        // Note: If model were loaded, this would return "Near Mint (NM)"
        XCTAssertEqual(ConditionEngine.overallGrade(damages: []), "Ungraded")
    }

    // MARK: - Export Engine Tests
    
    func testCSVExportGeneration() {
        let card1 = SavedCard(
            from: CardMetadata(id: UUID(), name: "Card A", setCode: "SET", collectorNumber: "1", hasFoilPrinting: false, hasSerializedPrinting: false, priceScanned: 10.0),
            imageName: "img1.jpg", collection: "Col", location: "Loc"
        )
        var card2 = SavedCard(
            from: CardMetadata(id: UUID(), name: "Card B", setCode: "SET", collectorNumber: "2", hasFoilPrinting: true, hasSerializedPrinting: true, priceScanned: 20.0),
            imageName: "img2.jpg", collection: "Col", location: "Loc"
        )
        card2.isSerialized = true
        
        let csv = ExportEngine.generateString(cards: [card1, card2], format: .csv)
        let lines = csv.components(separatedBy: "\n")
        
        // Header + 2 cards + empty newline at end
        XCTAssertTrue(lines[0].contains("Count,Name,Set,Number,Condition,Foil,Price,Serialized"))
        
        // Check Card 1
        XCTAssertTrue(lines[1].contains("\"Card A\",SET,1"))
        XCTAssertTrue(lines[1].contains(",No"))
        
        // Check Card 2
        XCTAssertTrue(lines[2].contains("\"Card B\",SET,2"))
        XCTAssertTrue(lines[2].contains(",Yes"))
    }
    
    func testArenaExportGeneration() {
        let card = SavedCard(
            from: CardMetadata(id: UUID(), name: "Lightning Bolt", setCode: "LEA", collectorNumber: "161", hasFoilPrinting: false, hasSerializedPrinting: false),
            imageName: "img.jpg", collection: "Binder", location: "Box"
        )
        
        let arena = ExportEngine.generateString(cards: [card], format: .arena)
        XCTAssertEqual(arena, "1 Lightning Bolt (LEA) 161")
    }
    
    func testMTGOExportGeneration() {
        let card = SavedCard(
            from: CardMetadata(id: UUID(), name: "Lightning Bolt", setCode: "LEA", collectorNumber: "161", hasFoilPrinting: false, hasSerializedPrinting: false),
            imageName: "img.jpg", collection: "Binder", location: "Box"
        )
        
        let mtgo = ExportEngine.generateString(cards: [card], format: .mtgo)
        XCTAssertEqual(mtgo, "1 Lightning Bolt")
    }

    // MARK: - ViewModel Logic Tests
    // CollectionViewModel owns filtering and portfolio logic; tests target it directly.

    @MainActor
    func testViewModelFiltering() {
        let vm = CollectionViewModel()

        let card1 = SavedCard(from: CardMetadata(id: UUID(), name: "Alpha", setCode: "A", collectorNumber: "1", hasFoilPrinting: false, hasSerializedPrinting: false, priceScanned: 100), imageName: "1", collection: "Master Collection", location: "Box")
        let card2 = SavedCard(from: CardMetadata(id: UUID(), name: "Beta", setCode: "B", collectorNumber: "2", hasFoilPrinting: false, hasSerializedPrinting: false, priceScanned: 200), imageName: "2", collection: "Master Collection", location: "Box")

        // Inject test data after the async SwiftData init load has completed.
        let expectation = XCTestExpectation(description: "Filter updates")
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
            vm.scannedList = [card1, card2]
            vm.librarySearchText = "Alpha"

            DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
                XCTAssertEqual(vm.filteredList.count, 1)
                XCTAssertEqual(vm.filteredList.first?.name, "Alpha")
                expectation.fulfill()
            }
        }

        wait(for: [expectation], timeout: 2.0)
    }

    @MainActor
    func testPortfolioCalculation() {
        let vm = CollectionViewModel()
        let card1 = SavedCard(from: CardMetadata(id: UUID(), name: "A", setCode: "A", collectorNumber: "1", hasFoilPrinting: false, hasSerializedPrinting: false, priceScanned: 50.0), imageName: "1", collection: "Master Collection", location: "Box")
        let card2 = SavedCard(from: CardMetadata(id: UUID(), name: "B", setCode: "B", collectorNumber: "2", hasFoilPrinting: false, hasSerializedPrinting: false, priceScanned: 150.0), imageName: "2", collection: "Master Collection", location: "Box")

        let expectation = XCTestExpectation(description: "Stats update")
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
            vm.scannedList = [card1, card2]

            DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
                XCTAssertEqual(vm.portfolioValue, 200.0)
                expectation.fulfill()
            }
        }
        wait(for: [expectation], timeout: 2.0)
    }
}