import XCTest
@testable import iPodderX

/// The keyboard map. A wrong letter here loses a shortcut silently -- the key does nothing and
/// nothing says why -- so the map is worth checking even though driving the keys is not.
final class KeysTests: XCTestCase {
    func testTheKeysAreThePagesKeys() {
        // Straight from web/src/player.ts: j and n forward, k and p back.
        XCTAssertEqual(Keys.action(for: "j", afterG: false), .nextItem)
        XCTAssertEqual(Keys.action(for: "n", afterG: false), .nextItem)
        XCTAssertEqual(Keys.action(for: "k", afterG: false), .previousItem)
        XCTAssertEqual(Keys.action(for: "p", afterG: false), .previousItem)
        XCTAssertEqual(Keys.action(for: "J", afterG: false), .nextFeed)
        XCTAssertEqual(Keys.action(for: "K", afterG: false), .previousFeed)
        XCTAssertEqual(Keys.action(for: "o", afterG: false), .play)
        XCTAssertEqual(Keys.action(for: "m", afterG: false), .toggleRead)
        XCTAssertEqual(Keys.action(for: "s", afterG: false), .togglePin)
        XCTAssertEqual(Keys.action(for: "v", afterG: false), .openOriginal)
        XCTAssertEqual(Keys.action(for: "A", afterG: false), .readAll)
        XCTAssertEqual(Keys.action(for: "r", afterG: false), .refresh)
        XCTAssertEqual(Keys.action(for: "[", afterG: false), .toggleSidebar)
        XCTAssertEqual(Keys.action(for: "?", afterG: false), .shortcuts)
        XCTAssertEqual(Keys.action(for: " ", afterG: false), .playPause)
        XCTAssertEqual(Keys.action(for: UIKeyCommand.inputLeftArrow, afterG: false), .back15)
        XCTAssertEqual(Keys.action(for: UIKeyCommand.inputRightArrow, afterG: false), .forward30)
    }

    /// The g pairs, and the two letters that mean different things depending on the g.
    func testAPairMeansSomethingElse() {
        XCTAssertEqual(Keys.action(for: "a", afterG: true), .go(.all))
        XCTAssertEqual(Keys.action(for: "d", afterG: true), .go(.directory))
        XCTAssertEqual(Keys.action(for: "l", afterG: true), .go(.listening))

        // p is Previous item on its own and Popular after g; s is Pin, then Settings.
        XCTAssertEqual(Keys.action(for: "p", afterG: false), .previousItem)
        XCTAssertEqual(Keys.action(for: "p", afterG: true), .go(.popular))
        XCTAssertEqual(Keys.action(for: "s", afterG: false), .togglePin)
        XCTAssertEqual(Keys.action(for: "s", afterG: true), .go(.settings))

        XCTAssertEqual(Keys.action(for: "g", afterG: false), .startPair)
        // A letter that is no part of a pair still does its own thing after a g.
        XCTAssertEqual(Keys.action(for: "j", afterG: true), .nextItem)
    }

    func testEveryKeyIsRegisteredAsACommand() {
        let registered = Set(Keys.commands(#selector(getter: UIView.tag)).compactMap(\.input))
        for key in Keys.single.keys {
            XCTAssertTrue(registered.contains(key), "\(key) is mapped but never registered")
        }
        for key in Keys.paired.keys {
            XCTAssertTrue(registered.contains(key), "\(key) is a pair but never registered")
        }
        XCTAssertTrue(registered.contains(" "), "space is not registered")
    }

    /// The window matches the page's: a second key counts for a second and a half after the g.
    func testThePairWindowMatchesThePage() {
        XCTAssertEqual(Keys.pairWindow, 1.5)
    }
}