import { VideoEmotion, purchase } from "../../schema/schema";
import { Dialog } from "./DialogData";
import { ConfigManager } from "../manager/ConfigManager";
import { DataId, DataManager } from "./DataManager";
import { GirlData } from "./GirlData";

/**
 * 单个角色的聊天数据结构
 */
export interface RoleChatData {
  categoryId: string;
  girlId: number;
  dialogs: Dialog[];
  currentEmotion: VideoEmotion;
  lastActiveTime: Date;
}

/**
 * 聊天数据模型类 (多角色管理器)
 *
 * 负责管理多个角色的聊天相关数据，包括：
 * - 多个角色的数据和配置
 * - 各角色独立的对话历史记录
 * - 各角色独立的情绪状态
 * - 视频配置管理
 * - 角色切换和数据持久化
 *
 * 这是MVP架构中的Model层，专注于多角色数据管理和业务逻辑
 */
export class ChatModel {
  // 存储所有角色的数据
  private rolesData: Map<number, RoleChatData> = new Map();

  // 当前活跃的角色ID
  private currentGirlId: number | null = null;

  // 最大缓存角色数量（内存管理）
  private maxCachedRoles: number = 10;

  /**
   * 初始化或切换到指定角色
   * @param girlId 角色ID
   * @returns 是否成功
   */
  public initializeRole(categoryId: string, girlId: number): boolean {
    if (girlId <= 0) {
      console.error("ChatModel: Invalid roleId provided");
      return false;
    }

    // 如果角色数据已存在，直接切换
    if (this.rolesData.has(girlId)) {
      this.currentGirlId = girlId;
      this.updateLastActiveTime(girlId);
      console.log(`ChatModel: Switched to existing role ${girlId}`);
      return true;
    }

    // 创建新的角色数据
    const newRoleData = this.createRoleData(categoryId, girlId);
    if (newRoleData) {
      // 内存管理：如果超过最大缓存数量，清理最久未使用的角色
      this.manageMemory();

      this.rolesData.set(girlId, newRoleData);
      this.currentGirlId = girlId;
      console.log(`ChatModel: Initialized new role ${girlId}`);
      return true;
    }

    return false;
  }

  /**
   * 检查是否有指定角色的数据
   * @param roleId 角色ID
   */
  public hasRoleData(roleId: number): boolean {
    return this.rolesData.has(roleId);
  }

  /**
   * 切换到指定角色（不存在则初始化）
   * @param roleId 角色ID
   * @returns 是否成功
   */
  public switchToRole(categoryId: string, roleId: number): boolean {
    return this.initializeRole(categoryId, roleId);
  }

  /**
   * 创建新的角色数据
   * @param girlId 角色ID
   * @returns 角色数据对象
   */
  private createRoleData(
    categoryId: string,
    girlId: number
  ): RoleChatData | null {
    try {
      // 加载角色基础数据

      const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);
      const chatTotalCount = girlData.getChatTotalCount(categoryId, girlId);

      //const roleData = ConfigManager.tables.TbGirls.get(roleId);
      //const roleDetail = ConfigManager.tables.TbGirlsDetail.get(roleId);

      if (!girlData) {
        console.error(`ChatModel: Role data not found for roleId ${girlId}`);
        return null;
      }

      //Todo:未接入后端数据 待补充
      // 创建角色数据对象
      const newRoleData: RoleChatData = {
        girlId: girlId,
        categoryId: categoryId,
        dialogs: [],
        currentEmotion: VideoEmotion.calm_down,
        lastActiveTime: new Date(),
      };

      return newRoleData;
    } catch (error) {
      console.error(
        `ChatModel: Failed to create role data for ${girlId}:`,
        error
      );
      return null;
    }
  }

  /**
   * 内存管理：清理最久未使用的角色数据
   */
  private manageMemory(): void {
    if (this.rolesData.size < this.maxCachedRoles) {
      return;
    }

    // 找出最久未使用的角色
    let oldestRoleId: number | null = null;
    let oldestTime: Date = new Date();

    for (const [roleId, roleData] of this.rolesData.entries()) {
      if (roleData.lastActiveTime < oldestTime) {
        oldestTime = roleData.lastActiveTime;
        oldestRoleId = roleId;
      }
    }

    if (oldestRoleId !== null) {
      this.rolesData.delete(oldestRoleId);
      console.log(`ChatModel: Cleaned up unused role ${oldestRoleId} data`);
    }
  }

  /**
   * 更新角色最后活跃时间
   * @param roleId 角色ID
   */
  private updateLastActiveTime(roleId: number): void {
    const roleData = this.rolesData.get(roleId);
    if (roleData) {
      roleData.lastActiveTime = new Date();
    }
  }

  /**
   * 获取当前活跃角色ID
   */
  public getCurrentRoleId(): number | null {
    return this.currentGirlId;
  }

  /**
   * 获取当前角色数据
   */
  public getCurrentRoleData(): RoleChatData | null {
    if (!this.currentGirlId) {
      return null;
    }
    return this.rolesData.get(this.currentGirlId) || null;
  }

  /**
   * 获取对话记录
   * @param roleId 角色ID，不传则使用当前角色
   */
  public getDialogs(roleId?: number): Dialog[] {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      return [];
    }

    const roleData = this.rolesData.get(targetRoleId);
    return roleData ? [...roleData.dialogs] : []; // 返回副本避免外部修改
  }

  /**
   * 添加对话记录
   * @param isPlayer 是否为玩家消息
   * @param content 消息内容
   * @param roleId 角色ID，不传则使用当前角色
   */
  public addDialog(isPlayer: boolean, content: string, roleId?: number): void {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      console.warn("ChatModel: Cannot add dialog - no active role");
      return;
    }

    if (!content || content.trim() === "") {
      console.warn("ChatModel: Cannot add empty dialog content");
      return;
    }

    const roleData = this.rolesData.get(targetRoleId);
    if (!roleData) {
      console.warn(`ChatModel: Role data not found for roleId ${targetRoleId}`);
      return;
    }

    const dialog: Dialog = {
      isPlayer: isPlayer,
      content: content.trim(),
    };

    roleData.dialogs.push(dialog);
    this.updateLastActiveTime(targetRoleId);
    console.log(
      `ChatModel: Dialog added for role ${targetRoleId} (isPlayer: ${isPlayer}, content length: ${content.length})`
    );
  }

  /**
   * 清空对话记录
   * @param roleId 角色ID，不传则使用当前角色
   */
  public clearDialogs(roleId?: number): void {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      console.warn("ChatModel: Cannot clear dialogs - no active role");
      return;
    }

    const roleData = this.rolesData.get(targetRoleId);
    if (roleData) {
      roleData.dialogs = [];
      this.updateLastActiveTime(targetRoleId);
      console.log(`ChatModel: Dialogs cleared for role ${targetRoleId}`);
    }
  }

  /**
   * 获取当前情绪状态
   * @param roleId 角色ID，不传则使用当前角色
   */
  public getCurrentEmotion(roleId?: number): VideoEmotion {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      return VideoEmotion.calm_down;
    }

    const roleData = this.rolesData.get(targetRoleId);
    return roleData ? roleData.currentEmotion : VideoEmotion.calm_down;
  }

  /**
   * 设置当前情绪状态
   * @param emotion 新的情绪状态
   * @param roleId 角色ID，不传则使用当前角色
   */
  public setCurrentEmotion(emotion: VideoEmotion, roleId?: number): void {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      console.warn("ChatModel: Cannot set emotion - no active role");
      return;
    }

    const roleData = this.rolesData.get(targetRoleId);
    if (!roleData) {
      console.warn(`ChatModel: Role data not found for roleId ${targetRoleId}`);
      return;
    }

    if (roleData.currentEmotion !== emotion) {
      const oldEmotion = roleData.currentEmotion;
      roleData.currentEmotion = emotion;
      this.updateLastActiveTime(targetRoleId);
      console.log(
        `ChatModel: Role ${targetRoleId} emotion changed from ${VideoEmotion[oldEmotion]} to ${VideoEmotion[emotion]}`
      );
    }
  }

  /**
   * 根据情绪获取对应的视频（如果有多个视频，随机返回一个）
   * @param emotion 目标情绪
   * @param roleId 角色ID，不传则使用当前角色
   * @returns 匹配的视频url
   */
  public getVideoByEmotion(emotion: VideoEmotion, roleId?: number): string {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      return null;
    }

    const roleData = this.rolesData.get(targetRoleId);
    if (!roleData) {
      return null;
    }
    const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);
    const allvideoIDs = girlData.getAllDisplayGrilVideoId(
      roleData.categoryId,
      roleData.girlId
    );
    let targetIds: number[] = [];
    for (let i = 0; i < allvideoIDs.length; i++) {
      const element = allvideoIDs[i];
      if (
        girlData.getGrilVideoEmotion(
          roleData.categoryId,
          roleData.girlId,
          element
        ) === emotion
      ) {
        targetIds.push(allvideoIDs[i]);
      }
    }

    if (targetIds.length === 0) {
      return null;
    }

    // 如果只有一个匹配的视频，直接返回
    if (targetIds.length === 1) {
      return girlData.getGrilVideoPath(
        roleData.categoryId,
        roleData.girlId,
        targetIds[0]
      );
    }

    // 如果有多个匹配的视频，随机选择一个
    const randomIndex = Math.floor(Math.random() * targetIds.length);
    return girlData.getGrilVideoPath(
      roleData.categoryId,
      roleData.girlId,
      targetIds[randomIndex]
    );
  }

  /**
   * 获取默认视频（第一个视频或平静状态视频）
   * @param girlId 角色ID，不传则使用当前角色
   */
  public getDefaultVideo(): string {
    const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);
    const roleData = this.rolesData.get(this.currentGirlId);

    const allvideoIDs = girlData.getAllDisplayGrilVideoId(
      roleData.categoryId,
      roleData.girlId
    );
    let targetId: number = -1;
    for (let i = 0; i < allvideoIDs.length; i++) {
      const element = allvideoIDs[i];
      if (
        girlData.getGrilVideoEmotion(
          roleData.categoryId,
          roleData.girlId,
          element
        ) === VideoEmotion.calm_down
      ) {
        targetId = element;
      }
    }
    if (targetId == -1) {
      return null;
    } else {
      return girlData.getGrilVideoPath(
        roleData.categoryId,
        roleData.girlId,
        targetId
      );
    }
  }

  /**
   * 获取对话数量
   * @param roleId 角色ID，不传则使用当前角色
   */
  public getDialogCount(roleId?: number): number {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      return 0;
    }

    const roleData = this.rolesData.get(targetRoleId);
    return roleData ? roleData.dialogs.length : 0;
  }

  /**
   * 获取最后一条对话
   * @param roleId 角色ID，不传则使用当前角色
   */
  public getLastDialog(roleId?: number): Dialog | null {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      return null;
    }

    const roleData = this.rolesData.get(targetRoleId);
    if (!roleData || roleData.dialogs.length === 0) {
      return null;
    }

    return roleData.dialogs[roleData.dialogs.length - 1];
  }

  /**
   * 重置所有数据到初始状态
   */
  public reset(): void {
    this.rolesData.clear();
    this.currentGirlId = null;
    console.log(
      "ChatModel: All role data cleared and model reset to initial state"
    );
  }

  /**
   * 重置指定角色的数据
   * @param roleId 角色ID
   */
  public resetRole(roleId: number): void {
    if (this.rolesData.has(roleId)) {
      this.rolesData.delete(roleId);

      // 如果删除的是当前角色，清空当前角色ID
      if (this.currentGirlId === roleId) {
        this.currentGirlId = null;
      }

      console.log(`ChatModel: Role ${roleId} data cleared`);
    }
  }

  /**
   * 验证当前模型状态
   * @param roleId 角色ID，不传则使用当前角色
   */
  public validate(roleId?: number): boolean {
    const targetRoleId = roleId || this.currentGirlId;
    if (!targetRoleId) {
      console.error("ChatModel: No active role");
      return false;
    }

    const roleData = this.rolesData.get(targetRoleId);
    if (!roleData) {
      console.error(`ChatModel: Role data not found for ${targetRoleId}`);
      return false;
    }
    return true;
  }

  /**
   * 获取所有角色数据摘要
   */
  public getAllRolesData(): Map<number, RoleChatData> {
    return new Map(this.rolesData);
  }

  /**
   * 获取缓存的角色数量
   */
  public getCachedRoleCount(): number {
    return this.rolesData.size;
  }

  /**
   * 获取所有角色ID列表
   */
  public getAllRoleIds(): number[] {
    return Array.from(this.rolesData.keys());
  }

  /**
   * 清除指定角色的数据（外部调用接口）
   * @param roleId 角色ID
   */
  public clearRoleData(roleId: number): void {
    this.resetRole(roleId);
  }

  /**
   * 设置最大缓存角色数量
   * @param maxCount 最大缓存数量
   */
  public setMaxCachedRoles(maxCount: number): void {
    if (maxCount > 0) {
      this.maxCachedRoles = maxCount;
      console.log(`ChatModel: Max cached roles set to ${maxCount}`);

      // 如果当前缓存超过新限制，清理多余的
      this.manageMemory();
    }
  }

  /**
   * 获取默认聊天次数限制
   * TODO: 以后从后端获取，目前默认返回10
   * @returns 默认聊天次数限制
   */
  private getDefaultChatLimit(): number {
    return 1;
  }

  /**
   * 检查角色是否还有剩余聊天次数
   * @param roleId 角色ID，不传则使用当前角色
   * @returns 是否可以继续聊天
   */
  public canChat(roleId?: number): boolean {
    const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);
    const roleData = this.rolesData.get(this.currentGirlId);

    return (
      girlData.getChatRemainCount(roleData.categoryId, roleData.girlId) > 0
    );
  }
}