import AppKit
import ConjureKit
import Testing
@testable import Conjure

@Test @MainActor func emojiDownNavigationFollowsRenderedColumns() throws {
    _ = NSApplication.shared
    let suite = "EmojiGrid.\(UUID().uuidString)"
    let defaults = UserDefaults(suiteName: suite)!
    let pasteboard = NSPasteboard.withUniqueName()
    defer { defaults.removePersistentDomain(forName: suite); pasteboard.releaseGlobally() }
    let picker = EmojiPickerController(defaults: defaults, pasteboard: pasteboard)
    let window = NSWindow(contentRect: NSRect(x: 0, y: 0, width: 750, height: 400),
                          styleMask: [.borderless], backing: .buffered, defer: false)
    window.contentView = picker.view
    picker.view.layoutSubtreeIfNeeded()
    let scroll = try #require(picker.view.subviews.compactMap { $0 as? NSScrollView }.first)
    let grid = try #require(scroll.documentView as? NSCollectionView)
    let layout = try #require(grid.collectionViewLayout)
    let first = try #require(layout.layoutAttributesForItem(at: IndexPath(item: 0, section: 0)))
    let nextRow = try #require((1..<grid.numberOfItems(inSection: 0)).first { index in
        guard let frame = layout.layoutAttributesForItem(at: IndexPath(item: index, section: 0))?.frame else { return false }
        return frame.minY > first.frame.minY
    })
    #expect(picker.handle(#selector(NSResponder.moveDown(_:))))
    picker.copySelection()
    #expect(pasteboard.string(forType: .string) == EmojiCatalog.all[nextRow].value)
    print("Emoji grid: \(nextRow) columns at 750 points; down navigation follows the rendered row.")
}

@Test @MainActor func emojiNavigationCrossesFavoritesRecentAndCategorySections() throws {
    _ = NSApplication.shared
    let suite = "EmojiSections.\(UUID().uuidString)"
    let defaults = UserDefaults(suiteName: suite)!
    let pasteboard = NSPasteboard.withUniqueName()
    defer { defaults.removePersistentDomain(forName: suite); pasteboard.releaseGlobally() }
    defaults.set(["👩‍💻", "🙏"], forKey: "favoriteEmoji")
    defaults.set(["🚀", "👩‍💻", "😀"], forKey: "recentEmoji")
    let picker = EmojiPickerController(defaults: defaults, pasteboard: pasteboard)
    let window = NSWindow(contentRect: NSRect(x: 0, y: 0, width: 750, height: 400),
                          styleMask: [.borderless], backing: .buffered, defer: false)
    window.contentView = picker.view
    picker.view.layoutSubtreeIfNeeded()
    let scroll = try #require(picker.view.subviews.compactMap { $0 as? NSScrollView }.first)
    let grid = try #require(scroll.documentView as? NSCollectionView)
    #expect(grid.numberOfItems(inSection: 0) == 2)
    #expect(grid.numberOfItems(inSection: 1) == 2)
    #expect((0..<grid.numberOfSections).reduce(0) { $0 + grid.numberOfItems(inSection: $1) } == EmojiCatalog.all.count)
    func expectCopied(_ emoji: String) {
        picker.copySelection()
        #expect(pasteboard.string(forType: .string) == emoji)
    }
    expectCopied("👩‍💻")
    picker.moveSelection(by: 1)
    #expect(picker.handleControlKey("j"))
    expectCopied("😀")
    #expect(picker.handleControlKey("k"))
    expectCopied("🙏")
    picker.moveSelection(by: -1)
    #expect(picker.handleControlKey("j"))
    expectCopied("🚀")
    #expect(picker.handleControlKey("j"))
    expectCopied(try #require(EmojiCatalog.all.first { !["👩‍💻", "🙏", "🚀", "😀"].contains($0.value) }).value)
    #expect(picker.handleControlKey("k"))
    expectCopied("🚀")
}