import XCTest
@testable import TVAnarchyCore

final class CommandTemplateTests: XCTestCase {
    func testSubstitutionAndOptionalDrop() {
        let t = ["/usr/local/bin/black-tv", "play-show", "{query}", "{season?}", "{episode?}"]
        // optional episode absent → its word is dropped entirely
        let r = CommandTemplate.render(t, ["query": "Psych", "season": "3", "episode": nil])
        XCTAssertEqual(r, "'/usr/local/bin/black-tv' 'play-show' 'Psych' '3'")
    }

    func testAllOptionalsPresent() {
        let t = ["btv", "play-show", "{query}", "{season?}", "{episode?}"]
        XCTAssertEqual(CommandTemplate.render(t, ["query": "X", "season": "1", "episode": "4"]),
                       "'btv' 'play-show' 'X' '1' '4'")
    }

    func testShqEscapesDangerousValues() {
        // apostrophes, spaces, and shell metachars must be neutralized
        let r = CommandTemplate.render(["btv", "play", "{path}"],
                                       ["path": "/m/It's $HOME & co/ep.mkv"])
        // Fully single-quoted (only the apostrophe is broken out & re-escaped), so
        // the remote shell sees one literal word — `$HOME`/`&` can't expand or split.
        XCTAssertEqual(r, "'btv' 'play' '/m/It'\\''s $HOME & co/ep.mkv'")
    }

    func testRequiredMissingBecomesEmptyWord() {
        XCTAssertEqual(CommandTemplate.render(["a", "{x}"], [:]), "'a' ''")
    }

    func testPlaceholderParsing() {
        XCTAssertEqual(CommandTemplate.placeholder("{query}")?.name, "query")
        XCTAssertEqual(CommandTemplate.placeholder("{query}")?.optional, false)
        XCTAssertEqual(CommandTemplate.placeholder("{season?}")?.optional, true)
        XCTAssertNil(CommandTemplate.placeholder("literal"))
        XCTAssertNil(CommandTemplate.placeholder("{}"))
    }
}