import XCTest
@testable import Ten31Transcripts

final class SessionNamingTests: XCTestCase {

    // MARK: sanitize

    func testSanitizeTrimsAndKeepsSpaces() {
        XCTAssertEqual(SessionNaming.sanitize("  Weekly Sync  "), "Weekly Sync")
    }

    func testSanitizeReplacesPathSeparators() {
        XCTAssertEqual(SessionNaming.sanitize("9/10 standup"), "9-10 standup")
        XCTAssertEqual(SessionNaming.sanitize("a:b\\c"), "a-b-c")
    }

    func testSanitizeCollapsesWhitespaceRuns() {
        XCTAssertEqual(SessionNaming.sanitize("board    1:1"), "board 1-1")
    }

    func testSanitizeStripsLeadingDots() {
        XCTAssertEqual(SessionNaming.sanitize("...hidden"), "hidden")
        XCTAssertEqual(SessionNaming.sanitize(".."), "")
    }

    func testSanitizeEmptyForBlankOrWhitespace() {
        XCTAssertEqual(SessionNaming.sanitize(""), "")
        XCTAssertEqual(SessionNaming.sanitize("   \n\t "), "")
    }

    func testSanitizeCapsLength() {
        let long = String(repeating: "x", count: 200)
        XCTAssertEqual(SessionNaming.sanitize(long).count, 60)
    }

    func testSanitizeStripsControlCharacters() {
        XCTAssertEqual(SessionNaming.sanitize("a\u{0000}b\u{001F}c"), "abc")
    }

    // MARK: datePrefix

    func testDatePrefixFromAutoName() {
        XCTAssertEqual(SessionNaming.datePrefix(ofSessionNamed: "2026-06-17T09-59-48_signal"), "2026-06-17")
    }

    func testDatePrefixFromRenamedName() {
        XCTAssertEqual(SessionNaming.datePrefix(ofSessionNamed: "2026-06-17_Weekly sync_signal"), "2026-06-17")
    }

    // MARK: renamedLeaf

    func testRenamedLeafBasic() {
        XCTAssertEqual(
            SessionNaming.renamedLeaf(date: "2026-06-17", app: "signal", meetingName: "Weekly sync"),
            "2026-06-17_Weekly sync_signal")
    }

    func testRenamedLeafAppStaysLastSegment() {
        // The meeting name may contain underscores; the app must remain parseable as
        // the final "_"-segment (what SessionController.appLabel reads).
        let leaf = SessionNaming.renamedLeaf(date: "2026-06-17", app: "meet", meetingName: "q3_planning")
        XCTAssertEqual(leaf, "2026-06-17_q3_planning_meet")
        XCTAssertEqual(leaf?.split(separator: "_").last.map(String.init), "meet")
    }

    func testRenamedLeafNilForBlankName() {
        XCTAssertNil(SessionNaming.renamedLeaf(date: "2026-06-17", app: "signal", meetingName: "   "))
    }

    func testRenamedLeafCounterDisambiguatesNameSegment() {
        // A collision suffixes the NAME, not the whole leaf, so "_app" stays last.
        let leaf = SessionNaming.renamedLeaf(date: "2026-06-17", app: "signal", meetingName: "sync", counter: 1)
        XCTAssertEqual(leaf, "2026-06-17_sync-2_signal")
        XCTAssertEqual(leaf?.split(separator: "_").last.map(String.init), "signal")
    }

    func testRenamedLeafAppStaysLastAtMaxCollisionDepth() {
        // The 100-collision cap is counter 0…99; the app must still parse out last.
        let leaf = SessionNaming.renamedLeaf(date: "2026-06-17", app: "signal", meetingName: "q3_sync", counter: 99)
        XCTAssertEqual(leaf, "2026-06-17_q3_sync-100_signal")
        XCTAssertEqual(leaf?.split(separator: "_").last.map(String.init), "signal")
    }

    // MARK: recapTitle

    func testRecapTitleAutoNamePreservesLegacyFormat() {
        XCTAssertEqual(
            SessionNaming.recapTitle(app: "meet", sessionId: "2026-06-06T11-43-02_meet"),
            "Google Meet call — 2026-06-06 11:43")
    }

    func testRecapTitleNamedSession() {
        XCTAssertEqual(
            SessionNaming.recapTitle(app: "meet", sessionId: "2026-06-06_Weekly sync_meet"),
            "Weekly sync — Google Meet (2026-06-06)")
    }

    func testRecapTitleNamePreservesUnderscores() {
        // A meeting name with underscores must survive the split/join round-trip.
        XCTAssertEqual(
            SessionNaming.recapTitle(app: "meet", sessionId: "2026-06-06_q3_planning_meet"),
            "q3_planning — Google Meet (2026-06-06)")
    }

    func testRecapTitleUnknownAppCapitalizes() {
        XCTAssertEqual(
            SessionNaming.recapTitle(app: "manual", sessionId: "2026-06-06T11-43-02_manual"),
            "Manual call — 2026-06-06 11:43")
    }
}