import Foundation
import Testing
@testable import LocalData

// MARK: - Test Keys

private struct TestCatalogKey: StorageKey {
    typealias Value = String
    
    let name: String
    let domain: StorageDomain = .userDefaults(suite: nil)
    let security: SecurityPolicy = .none
    let serializer: Serializer<String> = .json
    let owner: String = "CatalogTests"
    let description: String
    let availability: PlatformAvailability = .all
    let syncPolicy: SyncPolicy = .never
    
    init(name: String, description: String = "Test key") {
        self.name = name
        self.description = description
    }
}

// MARK: - Test Catalogs

private struct ValidCatalog: StorageKeyCatalog {
    static var allKeys: [AnyStorageKey] {
        [
            .key(TestCatalogKey(name: "valid.key1", description: "First test key")),
            .key(TestCatalogKey(name: "valid.key2", description: "Second test key"))
        ]
    }
}

private struct DuplicateNameCatalog: StorageKeyCatalog {
    static var allKeys: [AnyStorageKey] {
        [
            .key(TestCatalogKey(name: "duplicate.name", description: "First instance")),
            .key(TestCatalogKey(name: "duplicate.name", description: "Second instance"))
        ]
    }
}

private struct EmptyCatalog: StorageKeyCatalog {
    static var allKeys: [AnyStorageKey] { [] }
}

// MARK: - Tests

struct StorageCatalogTests {
    
    @Test func auditReportContainsAllKeys() {
        let items = StorageAuditReport.items(for: ValidCatalog.self)
        
        #expect(items.count == 2)
        #expect(items[0].name == "valid.key1")
        #expect(items[1].name == "valid.key2")
    }
    
    @Test func auditReportRendersText() {
        let report = StorageAuditReport.renderText(for: ValidCatalog.self)
        
        #expect(report.contains("valid.key1"))
        #expect(report.contains("valid.key2"))
        #expect(report.contains("First test key"))
        #expect(report.contains("Second test key"))
    }
    
    @Test func descriptorCapturesKeyMetadata() {
        let key = TestCatalogKey(name: "metadata.test", description: "Metadata test key")
        let anyKey = AnyStorageKey.key(key)
        let descriptor = anyKey.descriptor
        
        #expect(descriptor.name == "metadata.test")
        #expect(descriptor.owner == "CatalogTests")
        #expect(descriptor.description == "Metadata test key")
        #expect(descriptor.valueType == "String")
    }
    
    @Test func emptyReportForEmptyCatalog() {
        let items = StorageAuditReport.items(for: EmptyCatalog.self)
        #expect(items.isEmpty)
        
        let report = StorageAuditReport.renderText(for: EmptyCatalog.self)
        #expect(report.isEmpty)
    }
    
    @Test func catalogRegistrationDetectsDuplicates() async {
        // Attempting to register a catalog with duplicate key names should throw
        await #expect(throws: StorageError.self) {
            try await StorageRouter.shared.registerCatalog(DuplicateNameCatalog.self)
        }
    }
}