import { query, type Entity, type World } from "../../src/index";
import {
  ActionCard,
  GameState,
  Player,
  Table,
  Tool,
  WoodenFishMarker,
  getPlayersInSeatOrder,
  getSelectedAction,
  getToolOf,
  type ActionKind,
  type ToolKind,
} from "./components";
import type { RoundProposals } from "./rules";

export const ACTION_LABELS: Record<ActionKind, string> = {
  fetchWater: "挑水",
  exchange: "交换",
  drink: "喝水",
  chant: "念经",
  rest: "休息",
};

export const TOOL_LABELS: Record<ToolKind, string> = {
  woodenFish: "木鱼",
  bucket: "水桶",
  bottle: "净瓶",
  woodenBucket: "木桶",
  bigBowl: "大碗",
  bigBucket: "大桶",
  mouse: "老鼠",
  shoulderPole: "扁担",
  waterJar: "水缸",
  ladle: "水瓢",
};

export interface PlayerSnapshot {
  entity: Entity;
  name: string;
  seat: number;
  water: number;
  action: ActionKind | null;
  tool: ToolKind;
  toolWater: number;
  hasMarker: boolean;
}

export interface GameSnapshot {
  round: number;
  centralWater: number;
  phase: string;
  winner: Entity | 0;
  players: PlayerSnapshot[];
}

export class GameLog {
  private readonly lines: string[] = [];

  add(line = ""): void {
    this.lines.push(line);
  }

  section(title: string): void {
    if (this.lines.length > 0) this.lines.push("");
    this.lines.push(title);
  }

  entries(): readonly string[] {
    return this.lines;
  }

  toString(): string {
    return this.lines.join("\n");
  }
}

export function snapshotGame(world: World): GameSnapshot {
  const table = world.getSingleton(Table);
  const marker = world.getSingleton(WoodenFishMarker).holder;
  const state = world.getSingleton(GameState);

  return {
    round: table.round,
    centralWater: table.centralWater,
    phase: state.phase,
    winner: state.winner,
    players: getPlayersInSeatOrder(world).map((player) => {
      const playerData = world.get(player, Player);
      const toolData = world.get(getToolOf(world, player), Tool);
      return {
        entity: player,
        name: playerData.name,
        seat: playerData.seat,
        water: playerData.water,
        action: getSelectedAction(world, player),
        tool: toolData.kind,
        toolWater: toolData.water,
        hasMarker: player === marker,
      };
    }),
  };
}

export function formatSnapshot(snapshot: GameSnapshot): string[] {
  return [
    `第 ${snapshot.round} 轮 | 中央水=${snapshot.centralWater} | 阶段=${formatPhase(snapshot.phase)}`,
    ...snapshot.players.map(formatPlayerSnapshot),
  ];
}

export function formatPlayerSnapshot(player: PlayerSnapshot): string {
  const marker = player.hasMarker ? " 🪵" : "";
  const action = player.action ? ` | 行动=${ACTION_LABELS[player.action]}` : "";
  return `${player.name}${marker}: 已喝=${player.water}, 道具=${TOOL_LABELS[player.tool]}(${player.toolWater})${action}`;
}

export function formatProposals(proposals: RoundProposals): string {
  const phases: string[] = [];
  if (proposals.chant) phases.push("念经");
  if (proposals.fetchWater) phases.push("挑水");
  if (proposals.exchange) phases.push("交换");
  if (proposals.drink) phases.push("喝水");
  return phases.length > 0 ? phases.join(" → ") : "无行动阶段";
}

export function formatAvailableActions(world: World, player: Entity): string {
  const actions: ActionKind[] = [];
  for (const card of world.query(query(ActionCard))) {
    const data = world.get(card, ActionCard);
    if (data.owner === player && data.zone === "hand") actions.push(data.kind);
  }
  return actions.map((action) => ACTION_LABELS[action]).join("、");
}

export function logSnapshot(log: GameLog, world: World): void {
  for (const line of formatSnapshot(snapshotGame(world))) {
    log.add(line);
  }
}

export function logPhaseDelta(
  log: GameLog,
  label: string,
  before: GameSnapshot,
  after: GameSnapshot,
): void {
  const changes: string[] = [];

  if (before.centralWater !== after.centralWater) {
    changes.push(`中央水 ${before.centralWater}→${after.centralWater}`);
  }

  for (const beforePlayer of before.players) {
    const afterPlayer = after.players.find(
      (p) => p.entity === beforePlayer.entity,
    )!;
    const playerChanges: string[] = [];

    if (beforePlayer.water !== afterPlayer.water) {
      playerChanges.push(`已喝 ${beforePlayer.water}→${afterPlayer.water}`);
    }
    if (
      beforePlayer.tool !== afterPlayer.tool ||
      beforePlayer.toolWater !== afterPlayer.toolWater
    ) {
      playerChanges.push(
        `道具 ${TOOL_LABELS[beforePlayer.tool]}(${beforePlayer.toolWater})→${TOOL_LABELS[afterPlayer.tool]}(${afterPlayer.toolWater})`,
      );
    }
    if (beforePlayer.hasMarker !== afterPlayer.hasMarker) {
      playerChanges.push(
        afterPlayer.hasMarker ? "获得木鱼标记" : "失去木鱼标记",
      );
    }

    if (playerChanges.length > 0) {
      changes.push(`${afterPlayer.name}: ${playerChanges.join("，")}`);
    }
  }

  if (changes.length === 0) {
    log.add(`  ${label}: 无变化`);
  } else {
    log.add(`  ${label}: ${changes.join("；")}`);
  }
}

export function formatPhase(phase: string): string {
  switch (phase) {
    case "setup":
      return "设置";
    case "selecting":
      return "出牌";
    case "resolving":
      return "结算";
    case "gameOver":
      return "游戏结束";
    default:
      return phase;
  }
}

export function winnerName(world: World): string | null {
  const winner = world.getSingleton(GameState).winner;
  if (winner === 0) return null;
  return world.get(winner, Player).name;
}