// The opponents are not different intelligences — they are different settings of
// the same engine: how strong it plays, how long it thinks, and how often it slips.
export interface Personality {
  id: string;
  face: string;
  name: string;
  blurb: string;
  skill: number; // Stockfish Skill Level, 0–20
  movetime: number; // ms the engine is allowed to think
  think: [number, number]; // min/max delay before the move lands, ms
  blunderChance: number; // chance of playing a random legal move instead
  multipv: number; // how many candidate moves to weigh when softening
  contempt: number; // >0 leans toward keeping tension, <0 toward trades
}

export const PERSONALITIES: Personality[] = [
  {
    id: "beginner",
    face: "🌱",
    name: "The Beginner",
    blurb: "Plays slowly and makes clear mistakes.",
    skill: 0,
    movetime: 120,
    think: [700, 1400],
    blunderChance: 0.28,
    multipv: 4,
    contempt: 0,
  },
  {
    id: "patient",
    face: "🐢",
    name: "The Patient",
    blurb: "Defensive, avoids risks, trades when it can.",
    skill: 4,
    movetime: 200,
    think: [800, 1500],
    blunderChance: 0.1,
    multipv: 3,
    contempt: -30,
  },
  {
    id: "trickster",
    face: "🦊",
    name: "The Trickster",
    blurb: "Hunts for forks, traps and quick attacks.",
    skill: 8,
    movetime: 300,
    think: [600, 1200],
    blunderChance: 0.06,
    multipv: 2,
    contempt: 40,
  },
  {
    id: "guardian",
    face: "🛡️",
    name: "The Guardian",
    blurb: "Values safety and a solid structure.",
    skill: 12,
    movetime: 400,
    think: [700, 1300],
    blunderChance: 0.03,
    multipv: 1,
    contempt: -20,
  },
  {
    id: "aggressor",
    face: "🔥",
    name: "The Aggressor",
    blurb: "Attacks early and accepts sacrifices.",
    skill: 15,
    movetime: 500,
    think: [500, 1100],
    blunderChance: 0.02,
    multipv: 1,
    contempt: 80,
  },
  {
    id: "master",
    face: "👁️",
    name: "The Master",
    blurb: "Strong and precise. Shows no mercy.",
    skill: 20,
    movetime: 1000,
    think: [500, 900],
    blunderChance: 0,
    multipv: 1,
    contempt: 0,
  },
];

export function getPersonality(id: string): Personality {
  return PERSONALITIES.find((p) => p.id === id) ?? PERSONALITIES[0];
}