import Testing
@testable import IPhotoSync
import Foundation

@Suite("IPhotoSyncStats")
struct SyncStatsTests {

    @Test("ETA returns nil when no upload is in progress")
    func etaNilWhenIdle() {
        let stats = IPhotoSyncStats()
        #expect(stats.eta == nil)
    }

    @Test("ETA returns seconds string when remaining < 60")
    func etaSeconds() {
        var stats = IPhotoSyncStats()
        stats.uploadStartTime = Date().addingTimeInterval(-10)
        stats.currentSessionUploaded = 10   // 1/sec
        stats.pendingUpload = 30
        // rate ≈ 1.0/sec → eta ≈ 30s
        guard let eta = stats.eta else {
            Issue.record("Expected non-nil ETA")
            return
        }
        #expect(eta.hasSuffix("s"), "Expected seconds suffix, got '\(eta)'")
    }

    @Test("uploadRateString shows per-minute when rate < 1/sec")
    func ratePerMinute() {
        var stats = IPhotoSyncStats()
        // 1 photo uploaded in 120s → 0.5/sec < 1 → per-minute format
        stats.uploadStartTime = Date().addingTimeInterval(-120)
        stats.currentSessionUploaded = 1
        let s = stats.uploadRateString
        #expect(s.hasSuffix("/min"), "Expected /min suffix, got '\(s)'")
    }

    @Test("uploadRateString shows per-second when rate >= 1/sec")
    func ratePerSecond() {
        var stats = IPhotoSyncStats()
        stats.uploadStartTime = Date().addingTimeInterval(-10)
        stats.currentSessionUploaded = 20  // 2/sec
        let s = stats.uploadRateString
        #expect(s.hasSuffix("/sec"), "Expected /sec suffix, got '\(s)'")
    }
}