import ConjureKit
import Foundation
import Testing

@Test @MainActor
func suggestionsPreferFrequencyThenRecencyAndKeepUnusedAppsAlphabetical() {
    let suite = "ConjureHistoryTests.\(UUID().uuidString)"
    let defaults = UserDefaults(suiteName: suite)!
    defer { defaults.removePersistentDomain(forName: suite) }
    var instant = Date(timeIntervalSinceReferenceDate: 1_000)
    let history = LaunchHistory(defaults: defaults, now: { instant })
    let apps = ["Unused Zebra", "Recent", "Frequent", "Unused Alpha", "Older"].map(historyApplication)
    #expect(history.suggestions(in: apps).map(\.name) == [
        "Frequent", "Older", "Recent", "Unused Alpha", "Unused Zebra",
    ])

    history.recordLaunch(of: apps[4])
    instant += 10
    history.recordLaunch(of: apps[2])
    history.recordLaunch(of: apps[2])
    instant += 10
    history.recordLaunch(of: apps[1])
    #expect(history.suggestions(in: apps).map(\.name) == [
        "Frequent", "Recent", "Older", "Unused Alpha", "Unused Zebra",
    ])
}

@Test @MainActor
func suggestionsRetainUsageAcrossHistoryInstancesAndDoNotReintroduceMissingApps() {
    let suite = "ConjureHistoryTests.\(UUID().uuidString)"
    let defaults = UserDefaults(suiteName: suite)!
    defer { defaults.removePersistentDomain(forName: suite) }
    let instant = Date(timeIntervalSinceReferenceDate: 2_000)
    let alpha = historyApplication("Alpha")
    let zebra = historyApplication("Zebra")
    let removed = historyApplication("Removed")
    let history = LaunchHistory(defaults: defaults, now: { instant })
    history.recordLaunch(of: zebra)
    history.recordLaunch(of: removed)
    history.recordLaunch(of: removed)

    let reloaded = LaunchHistory(defaults: UserDefaults(suiteName: suite)!, now: { instant })
    #expect(reloaded.suggestions(in: [alpha, zebra]).map(\.name) == ["Zebra", "Alpha"])
    reloaded.recordLaunch(of: alpha)
    #expect(reloaded.suggestions(in: [zebra, alpha]).map(\.name) == ["Alpha", "Zebra"])
}

@Test @MainActor
func usageTracksApplicationIdentityRatherThanDisplayNameAndKeepsTiesDeterministic() {
    let suite = "ConjureHistoryTests.\(UUID().uuidString)"
    let defaults = UserDefaults(suiteName: suite)!
    defer { defaults.removePersistentDomain(forName: suite) }
    let instant = Date(timeIntervalSinceReferenceDate: 3_000)
    let history = LaunchHistory(defaults: defaults, now: { instant })
    let first = Application(url: URL(fileURLWithPath: "/First/Editor.app"), name: "Editor")
    let second = Application(url: URL(fileURLWithPath: "/Second/Editor.app"), name: "Editor")
    #expect(history.suggestions(in: [second, first]).map(\.url) == [first.url, second.url])
    history.recordLaunch(of: second)
    #expect(history.suggestions(in: [first, second]).map(\.url) == [second.url, first.url])

    let renamed = Application(url: second.url, name: "Renamed Editor")
    #expect(history.suggestions(in: [first, renamed]).map(\.url) == [second.url, first.url])
    history.recordLaunch(of: first)
    #expect(history.suggestions(in: [second, first]).map(\.url) == [first.url, second.url])
}

@Test @MainActor
func applicationIdentityIgnoresDirectoryURLFormattingInLaunchHistory() {
    let suite = "ConjureHistoryTests.\(UUID().uuidString)"
    let defaults = UserDefaults(suiteName: suite)!
    defer { defaults.removePersistentDomain(forName: suite) }
    let instant = Date(timeIntervalSinceReferenceDate: 4_000)
    let history = LaunchHistory(defaults: defaults, now: { instant })
    let path = "/Applications/HistoryTests/Editor.app"
    let plain = Application(url: URL(fileURLWithPath: path, isDirectory: false), name: "Editor")
    let directory = Application(url: URL(fileURLWithPath: path, isDirectory: true), name: "Editor")
    #expect(plain.id == directory.id)
    history.recordLaunch(of: directory)
    #expect(history.suggestions(in: [historyApplication("Alpha"), plain]).first?.id == plain.id)
}

private func historyApplication(_ name: String) -> Application {
    Application(url: URL(fileURLWithPath: "/Applications/HistoryTests/\(name).app"), name: name)
}