using NUnit.Framework;
using ProjectM.Client;
using ProjectM.Simulation;

namespace ProjectM.Tests
{
    /// <summary>
    /// Pure-logic coverage for the first-run onboarding step machine (<see cref="OnboardingStepMath"/>) — the
    /// testable core of the client-only <c>OnboardingSystem</c>. No World/ECS needed: each case builds a
    /// <see cref="OnboardingStepMath.Snapshot"/> and asserts the deterministic advance rule, the mask helpers,
    /// the scheme-aware prompts, and the pointer kinds.
    /// </summary>
    public class OnboardingStepTests
    {
        static OnboardingStepMath.Snapshot Empty() => new OnboardingStepMath.Snapshot();

        // ---- mask helpers (resume point + dormant detection) ----

        [Test]
        public void FirstIncomplete_EmptyMask_IsWelcome()
            => Assert.AreEqual(OnboardingStepMath.Welcome, OnboardingStepMath.FirstIncomplete(0));

        [Test]
        public void FirstIncomplete_SkipsCompletedPrefix()
        {
            int mask = (1 << OnboardingStepMath.Welcome) | (1 << OnboardingStepMath.Move) | (1 << OnboardingStepMath.Mine);
            Assert.AreEqual(OnboardingStepMath.Build, OnboardingStepMath.FirstIncomplete(mask));
        }

        [Test]
        public void AllComplete_TrueForFullMaskAndMigrationSentinel()
        {
            Assert.IsFalse(OnboardingStepMath.AllComplete(0));
            int full = (1 << OnboardingStepMath.StepCount) - 1;
            Assert.IsTrue(OnboardingStepMath.AllComplete(full));
            Assert.IsTrue(OnboardingStepMath.AllComplete(int.MaxValue)); // the v1->v2 migration sentinel reads as done
        }

        // ---- per-step completion rules ----

        [Test]
        public void Welcome_AdvancesOnTimer()
        {
            var s = Empty(); s.StepElapsed = OnboardingStepMath.WelcomeSeconds - 0.1f;
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Welcome, s));
            s.StepElapsed = OnboardingStepMath.WelcomeSeconds;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Welcome, s));
        }

        [Test]
        public void Move_AdvancesAfterThreshold()
        {
            var s = Empty(); s.MoveDistance = OnboardingStepMath.MoveThreshold - 0.1f;
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Move, s));
            s.MoveDistance = OnboardingStepMath.MoveThreshold;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Move, s));
        }

        [Test]
        public void Mine_AdvancesOnlyWhenLedgerOreRises()
        {
            var s = Empty(); s.OreBaseline = 50; s.OreNow = 50; // starts at the seeded baseline
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Mine, s));
            s.OreNow = 51;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Mine, s));
        }

        [Test]
        public void Build_AbsoluteTurretCount_AutoSuppressesAtBuiltBase()
        {
            var s = Empty(); s.TurretCount = 0;
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Build, s));
            s.TurretCount = 1; // a join-client landing at an already-built base satisfies it on entry
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Build, s));
        }

        [Test]
        public void Fabricator_SoftBeat_AdvancesOnBuildOrTimeout()
        {
            var none = Empty();
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Fabricator, none));
            var built = Empty(); built.FabricatorCount = 1;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Fabricator, built));
            var timedOut = Empty(); timedOut.StepElapsed = OnboardingStepMath.FabricatorSoftSeconds;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Fabricator, timedOut));
        }

        [Test]
        public void Gate_AdvancesOnExpeditionEntryOrActiveObjective()
        {
            var s = Empty();
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Gate, s));
            var onExp = Empty(); onExp.OnExpedition = true;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Gate, onExp));
            var active = Empty(); active.ObjectiveState = ExpeditionObjectiveState.Active;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Gate, active));
        }

        [Test]
        public void Clear_AdvancesOnClearedObjective()
        {
            var s = Empty(); s.ObjectiveState = ExpeditionObjectiveState.Active;
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Clear, s));
            s.ObjectiveState = ExpeditionObjectiveState.Cleared;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Clear, s));
        }

        [Test]
        public void Return_AdvancesOnLeavingExpedition()
        {
            var s = Empty(); s.OnExpedition = true;
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Return, s));
            s.OnExpedition = false;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Return, s));
        }

        [Test]
        public void Defend_WaitsForSiegeEndButTimesOutWithoutOne()
        {
            var mid = Empty(); mid.SawSiege = true; mid.Phase = CyclePhase.Siege;
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Defend, mid));
            var survived = Empty(); survived.SawSiege = true; survived.Phase = CyclePhase.Calm;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Defend, survived));
            var noSiege = Empty(); noSiege.StepElapsed = OnboardingStepMath.DefendNoSiegeSeconds;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Defend, noSiege));
        }

        [Test]
        public void Done_LingersThenCompletes()
        {
            var s = Empty(); s.StepElapsed = OnboardingStepMath.DoneSeconds - 0.1f;
            Assert.IsFalse(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Done, s));
            s.StepElapsed = OnboardingStepMath.DoneSeconds;
            Assert.IsTrue(OnboardingStepMath.IsSatisfied(OnboardingStepMath.Done, s));
        }

        // ---- prompts (scheme-aware, never empty) ----

        [Test]
        public void Prompts_NonEmptyForEveryStep()
        {
            for (byte i = 0; i < OnboardingStepMath.StepCount; i++)
            {
                Assert.IsNotEmpty(OnboardingStepMath.Prompt(i, false), "kbm step " + i);
                Assert.IsNotEmpty(OnboardingStepMath.Prompt(i, true), "pad step " + i);
            }
        }

        [Test]
        public void Prompts_AreSchemeAware()
        {
            StringAssert.Contains("WASD", OnboardingStepMath.Prompt(OnboardingStepMath.Move, false));
            StringAssert.Contains("Tab", OnboardingStepMath.Prompt(OnboardingStepMath.Build, false));
            StringAssert.Contains("Y", OnboardingStepMath.Prompt(OnboardingStepMath.Build, true));
        }

        // ---- pointer kinds ----

        [Test]
        public void PointerKinds_MatchSpatialStepsOnly()
        {
            Assert.AreEqual(OnboardingStepMath.PointerOreNode, OnboardingStepMath.PointerKind(OnboardingStepMath.Mine));
            Assert.AreEqual(OnboardingStepMath.PointerBaseGate, OnboardingStepMath.PointerKind(OnboardingStepMath.Gate));
            Assert.AreEqual(OnboardingStepMath.PointerExpeditionGate, OnboardingStepMath.PointerKind(OnboardingStepMath.Return));
            Assert.AreEqual(OnboardingStepMath.PointerNone, OnboardingStepMath.PointerKind(OnboardingStepMath.Move));
            Assert.AreEqual(OnboardingStepMath.PointerNone, OnboardingStepMath.PointerKind(OnboardingStepMath.Defend));
        }
    }

    /// <summary>
    /// Public-surface coverage of the onboarding settings fields + their interaction with the dormant check
    /// (the v1->v2 migration itself runs through the private SettingsService.Migrate at load — its EFFECT is
    /// pinned here via the all-done sentinel + Defaults/Clamped, and end-to-end in the Play smoke).
    /// </summary>
    public class OnboardingSettingsTests
    {
        [Test]
        public void Defaults_TutorialOn_MaskEmpty()
        {
            var d = GameSettings.Defaults();
            Assert.AreEqual(1, d.TutorialHints);
            Assert.AreEqual(0, d.OnboardingMask);
            Assert.AreEqual(GameSettings.CurrentVersion, d.Version);
        }

        [Test]
        public void Clamped_NormalizesHints_PreservesMask()
        {
            var s = GameSettings.Defaults();
            s.TutorialHints = 5;       // out of the 0/1 range
            s.OnboardingMask = 0x55;   // an arbitrary bitmask must survive untouched
            var c = s.Clamped();
            Assert.AreEqual(1, c.TutorialHints);
            Assert.AreEqual(0x55, c.OnboardingMask);
        }

        [Test]
        public void Defaults_ForceEachLaunch_Off()
            => Assert.AreEqual(0, GameSettings.Defaults().ForceOnboardingEachLaunch);

        [Test]
        public void Clamped_NormalizesForceEachLaunchToBool()
        {
            var s = GameSettings.Defaults();
            s.ForceOnboardingEachLaunch = 7; // any non-zero collapses to the 0/1 dev flag
            Assert.AreEqual(1, s.Clamped().ForceOnboardingEachLaunch);
            s.ForceOnboardingEachLaunch = 0;
            Assert.AreEqual(0, s.Clamped().ForceOnboardingEachLaunch);
        }
    }
}