using SVSim.BattleNode.Bridge;

namespace SVSim.EmulatedEntrypoint.Matching;

/// <summary>
/// Phase 3 hardcoded fixture: one stub bot per class (1..8). <c>ai_id</c>
/// values 4001..4008 are placeholders per the existing
/// <c>docs/api-spec/endpoints/post-login/rank-battle/ai-start.md</c> TODO —
/// no live capture exists to validate the real prod catalog.
/// </summary>
public sealed class BotRoster : IBotRoster
{
    // Cosmetic ids (sleeve / emblem / degree / field) intentionally use safe
    // default values that match the master tables shipped in the project.
    // The client-side AI catalog reads ai_id but renders cosmetics from the
    // sleeveId/emblemId/etc returned here.
    private static readonly IReadOnlyList<AIBotProfile> Roster = new[]
    {
        new AIBotProfile(AiId: 4001, CountryCode: "NONE", UserName: "Forestcraft AI",
            SleeveId: 1001, EmblemId: 1, DegreeId: 1, FieldId: 1, IsOfficial: 0,
            ClassId: 1, CharaId: 1, Rank: 10, BattlePoint: 0, IsMasterRank: 0, MasterPoint: 0),
        new AIBotProfile(AiId: 4002, CountryCode: "NONE", UserName: "Swordcraft AI",
            SleeveId: 1001, EmblemId: 1, DegreeId: 1, FieldId: 1, IsOfficial: 0,
            ClassId: 2, CharaId: 2, Rank: 10, BattlePoint: 0, IsMasterRank: 0, MasterPoint: 0),
        new AIBotProfile(AiId: 4003, CountryCode: "NONE", UserName: "Runecraft AI",
            SleeveId: 1001, EmblemId: 1, DegreeId: 1, FieldId: 1, IsOfficial: 0,
            ClassId: 3, CharaId: 3, Rank: 10, BattlePoint: 0, IsMasterRank: 0, MasterPoint: 0),
        new AIBotProfile(AiId: 4004, CountryCode: "NONE", UserName: "Dragoncraft AI",
            SleeveId: 1001, EmblemId: 1, DegreeId: 1, FieldId: 1, IsOfficial: 0,
            ClassId: 4, CharaId: 4, Rank: 10, BattlePoint: 0, IsMasterRank: 0, MasterPoint: 0),
        new AIBotProfile(AiId: 4005, CountryCode: "NONE", UserName: "Shadowcraft AI",
            SleeveId: 1001, EmblemId: 1, DegreeId: 1, FieldId: 1, IsOfficial: 0,
            ClassId: 5, CharaId: 5, Rank: 10, BattlePoint: 0, IsMasterRank: 0, MasterPoint: 0),
        new AIBotProfile(AiId: 4006, CountryCode: "NONE", UserName: "Bloodcraft AI",
            SleeveId: 1001, EmblemId: 1, DegreeId: 1, FieldId: 1, IsOfficial: 0,
            ClassId: 6, CharaId: 6, Rank: 10, BattlePoint: 0, IsMasterRank: 0, MasterPoint: 0),
        new AIBotProfile(AiId: 4007, CountryCode: "NONE", UserName: "Havencraft AI",
            SleeveId: 1001, EmblemId: 1, DegreeId: 1, FieldId: 1, IsOfficial: 0,
            ClassId: 7, CharaId: 7, Rank: 10, BattlePoint: 0, IsMasterRank: 0, MasterPoint: 0),
        new AIBotProfile(AiId: 4008, CountryCode: "NONE", UserName: "Portalcraft AI",
            SleeveId: 1001, EmblemId: 1, DegreeId: 1, FieldId: 1, IsOfficial: 0,
            ClassId: 8, CharaId: 8, Rank: 10, BattlePoint: 0, IsMasterRank: 0, MasterPoint: 0),
    };

    public AIBotProfile Pick(MatchContext selfCtx)
    {
        // Deterministic: hash the ctx and pick from the roster. Same ctx →
        // same bot so a mid-flight retry of /ai_<fmt>/start returns the same
        // opponent (no fresh roster pick on each call).
        var hash = StringComparer.Ordinal.GetHashCode(selfCtx.UserName)
            ^ StringComparer.Ordinal.GetHashCode(selfCtx.ClassId);
        var index = (int)((uint)hash % Roster.Count);
        return Roster[index];
    }
}