import XCTest
@testable import TabataGo

final class TabataGoTests: XCTestCase {

    func testStreakComputationConsecutiveDays() {
        // Consecutive 3 days should yield streak of 3
        let calendar = Calendar.current
        let today = calendar.startOfDay(for: Date())
        let sessions: [Date] = [
            today,
            calendar.date(byAdding: .day, value: -1, to: today)!,
            calendar.date(byAdding: .day, value: -2, to: today)!,
        ]
        // Validate unique day count
        XCTAssertEqual(sessions.count, 3)
    }

    func testWorkoutSessionCompletionRate() {
        let session = WorkoutSession(
            programId: "test",
            programTitle: "Test",
            bodyZone: "full",
            level: "Beginner",
            startedAt: Date(),
            completedAt: Date(),
            durationSeconds: 1440,
            caloriesBurned: 180,
            roundsCompleted: 8,
            totalRounds: 8
        )
        XCTAssertEqual(session.completionRate, 1.0)
    }

    func testWorkoutSessionPartialCompletionRate() {
        let session = WorkoutSession(
            programId: "test",
            programTitle: "Test",
            bodyZone: "full",
            level: "Beginner",
            startedAt: Date(),
            completedAt: Date(),
            durationSeconds: 720,
            caloriesBurned: 90,
            roundsCompleted: 4,
            totalRounds: 8
        )
        XCTAssertEqual(session.completionRate, 0.5)
    }

    func testSubscriptionPlanIsPremium() {
        XCTAssertFalse(SubscriptionPlan.free.isPremium)
        XCTAssertTrue(SubscriptionPlan.premiumMonthly.isPremium)
        XCTAssertTrue(SubscriptionPlan.premiumYearly.isPremium)
    }

    func testTimerPhaseColors() {
        // Phase colors should differ
        XCTAssertNotEqual(Theme.phaseColor(.work), Theme.phaseColor(.rest))
        XCTAssertNotEqual(Theme.phaseColor(.work), Theme.phaseColor(.complete))
    }
}