using Unity.Entities;
using Unity.NetCode;

namespace ProjectM.Simulation
{
    /// <summary>
    /// END-2 — server-only marker of which run-phase the macro loop is in. Lives on the GLOBAL CycleDirector
    /// entity beside <see cref="CycleState"/>/<see cref="CycleRuntime"/>/<see cref="ThreatState"/>; NOT replicated
    /// (the client never needs to distinguish "the final siege is armed" — the larger wave + telegraph already read
    /// as escalation; the client shows the terminal banner from the replicated <see cref="RunOutcome"/> instead).
    /// SINGLE writer: <c>GoalReachedSystem</c> flips <see cref="RunPhaseId.Normal"/> -&gt;
    /// <see cref="RunPhaseId.FinalDefense"/> exactly once when <see cref="GoalProgress.Charge"/> reaches Target.
    /// Added at spawn by <c>CycleDirectorSpawnSystem</c> (like CycleRuntime/ThreatState), so it is server-world-only
    /// and never on the ghost serializer (no re-hash). A <c>byte</c> (never an enum) so a Bursted reader can't trip
    /// the cross-assembly-enum Burst ICE.
    /// </summary>
    public struct RunPhase : IComponentData
    {
        public byte Value;
    }

    /// <summary>Phase constants for <see cref="RunPhase.Value"/> (bytes — never an enum on a Bursted path).</summary>
    public static class RunPhaseId
    {
        /// <summary>Normal play: scheduled / post-expedition sieges arm; the goal meter climbs +1 per survived siege.</summary>
        public const byte Normal = 0;

        /// <summary>The goal cap was reached: the larger FINAL siege is armed/running. No further sieges arm.</summary>
        public const byte FinalDefense = 1;
    }

    /// <summary>
    /// END-2 — the terminal run outcome: the LATCHING win/lose state, REPLICATED so the client HUD shows the
    /// victory/loss banner by simply observing it (no fragile client-side reconstruction). Rides the GLOBAL
    /// untagged CycleDirector ghost (relevant to every connection in every region — it must NEVER be region-tagged;
    /// the shared-global-state rule), one <c>[GhostField] byte</c> alongside <see cref="CoreIntegrity"/>/
    /// <see cref="GoalProgress"/>. SINGLE writer: <c>CyclePhaseSystem</c> latches <see cref="RunOutcomeId.Victory"/>
    /// (final siege cleared) or <see cref="RunOutcomeId.Loss"/> (Core breached during the final siege). Once it is
    /// non-<see cref="RunOutcomeId.InProgress"/> the run HALTS (GoalReachedSystem + ThreatDirectorSystem stop arming;
    /// CoreRestoreSystem stops regen). Baked onto the prefab so it is part of the ghost (adding this <c>[GhostField]</c>
    /// re-hashes the CycleDirector ghost -&gt; one re-bake); born-correct at spawn (InProgress for a New Game, or the
    /// persisted value on Continue — SaveData v5).
    /// </summary>
    public struct RunOutcome : IComponentData
    {
        [GhostField] public byte Value;
    }

    /// <summary>Outcome constants for <see cref="RunOutcome.Value"/> (bytes — never an enum on a Bursted/serialized path).</summary>
    public static class RunOutcomeId
    {
        /// <summary>The run is live (no terminal result yet).</summary>
        public const byte InProgress = 0;

        /// <summary>The final siege was survived — the Engine holds. Terminal; the run halts.</summary>
        public const byte Victory = 1;

        /// <summary>The Core was breached during the final siege — overrun. Terminal; the run halts.</summary>
        public const byte Loss = 2;
    }
}