/**
 * Agent Store - Manages clones/agents, usage statistics, and plugin status
 *
 * Extracted from gatewayStore.ts for Phase 11 Store Refactoring.
 * This store focuses on agent/clone CRUD operations and related metadata.
 */
import { create } from 'zustand';
import type { GatewayClient } from '../lib/gateway-client';

// === Types ===

export interface Clone {
  id: string;
  name: string;
  role?: string;
  nickname?: string;
  scenarios?: string[];
  model?: string;
  workspaceDir?: string;
  workspaceResolvedPath?: string;
  restrictFiles?: boolean;
  privacyOptIn?: boolean;
  userName?: string;
  userRole?: string;
  createdAt: string;
  bootstrapReady?: boolean;
  bootstrapFiles?: Array<{ name: string; path: string; exists: boolean }>;
  updatedAt?: string;
}

export interface UsageStats {
  totalSessions: number;
  totalMessages: number;
  totalTokens: number;
  byModel: Record<string, { messages: number; inputTokens: number; outputTokens: number }>;
}

export interface PluginStatus {
  id: string;
  name?: string;
  status: 'active' | 'inactive' | 'error' | 'loading';
  version?: string;
  description?: string;
}

export interface CloneCreateOptions {
  name: string;
  role?: string;
  nickname?: string;
  scenarios?: string[];
  model?: string;
  workspaceDir?: string;
  restrictFiles?: boolean;
  privacyOptIn?: boolean;
  userName?: string;
  userRole?: string;
}

// === Store State ===

interface AgentStateSlice {
  clones: Clone[];
  usageStats: UsageStats | null;
  pluginStatus: PluginStatus[];
  isLoading: boolean;
  error: string | null;
}

// === Store Actions ===

interface AgentActionsSlice {
  loadClones: () => Promise<void>;
  createClone: (opts: CloneCreateOptions) => Promise<Clone | undefined>;
  updateClone: (id: string, updates: Partial<Clone>) => Promise<Clone | undefined>;
  deleteClone: (id: string) => Promise<void>;
  loadUsageStats: () => Promise<void>;
  loadPluginStatus: () => Promise<void>;
  setError: (error: string | null) => void;
  clearError: () => void;
}

// === Store Interface ===

export type AgentStore = AgentStateSlice & AgentActionsSlice;

// === Client Injection ===

// For coordinator to inject client - avoids direct import coupling
let _client: GatewayClient | null = null;

/**
 * Sets the gateway client for the agent store.
 * Called by the coordinator during initialization.
 */
export const setAgentStoreClient = (client: unknown): void => {
  _client = client as GatewayClient;
};

/**
 * Gets the gateway client.
 * Returns null if not set (coordinator must initialize first).
 */
const getClient = (): GatewayClient | null => _client;

// === Store Implementation ===

export const useAgentStore = create<AgentStore>((set, get) => ({
  // Initial state
  clones: [],
  usageStats: null,
  pluginStatus: [],
  isLoading: false,
  error: null,

  // Actions
  loadClones: async () => {
    const client = getClient();
    if (!client) {
      console.warn('[AgentStore] Client not initialized, skipping loadClones');
      return;
    }

    try {
      set({ isLoading: true, error: null });
      const result = await client.listClones();
      const clones = result?.clones || result?.agents || [];
      set({ clones, isLoading: false });

      // Set default agent ID if we have agents and none is set
      if (clones.length > 0 && clones[0].id) {
        const currentDefault = client.getDefaultAgentId();
        // Only set if the default doesn't exist in the list
        const defaultExists = clones.some((c: Clone) => c.id === currentDefault);
        if (!defaultExists) {
          client.setDefaultAgentId(clones[0].id);
        }
      }
    } catch (err: unknown) {
      const errorMessage = err instanceof Error ? err.message : String(err);
      set({ error: errorMessage, isLoading: false });
      // Don't throw - clone loading is non-critical
    }
  },

  createClone: async (opts: CloneCreateOptions) => {
    const client = getClient();
    if (!client) {
      console.warn('[AgentStore] Client not initialized');
      return undefined;
    }

    try {
      set({ isLoading: true, error: null });
      const result = await client.createClone(opts);
      await get().loadClones(); // Refresh the list
      return result?.clone;
    } catch (err: unknown) {
      const errorMessage = err instanceof Error ? err.message : String(err);
      set({ error: errorMessage, isLoading: false });
      return undefined;
    }
  },

  updateClone: async (id: string, updates: Partial<Clone>) => {
    const client = getClient();
    if (!client) {
      console.warn('[AgentStore] Client not initialized');
      return undefined;
    }

    try {
      set({ isLoading: true, error: null });
      const result = await client.updateClone(id, updates);
      await get().loadClones(); // Refresh the list
      return result?.clone;
    } catch (err: unknown) {
      const errorMessage = err instanceof Error ? err.message : String(err);
      set({ error: errorMessage, isLoading: false });
      return undefined;
    }
  },

  deleteClone: async (id: string) => {
    const client = getClient();
    if (!client) {
      console.warn('[AgentStore] Client not initialized');
      return;
    }

    try {
      set({ isLoading: true, error: null });
      await client.deleteClone(id);
      await get().loadClones(); // Refresh the list
    } catch (err: unknown) {
      const errorMessage = err instanceof Error ? err.message : String(err);
      set({ error: errorMessage, isLoading: false });
    }
  },

  loadUsageStats: async () => {
    const client = getClient();
    if (!client) {
      console.warn('[AgentStore] Client not initialized, skipping loadUsageStats');
      return;
    }

    try {
      const stats = await client.getUsageStats();
      set({ usageStats: stats });
    } catch {
      // Usage stats are non-critical, ignore errors silently
    }
  },

  loadPluginStatus: async () => {
    const client = getClient();
    if (!client) {
      console.warn('[AgentStore] Client not initialized, skipping loadPluginStatus');
      return;
    }

    try {
      const result = await client.getPluginStatus();
      set({ pluginStatus: result?.plugins || [] });
    } catch {
      // Plugin status is non-critical, ignore errors silently
    }
  },

  setError: (error: string | null) => {
    set({ error });
  },

  clearError: () => {
    set({ error: null });
  },
}));

// === Selectors ===

/**
 * Get a clone by ID
 */
export const selectCloneById = (id: string) => (state: AgentStore): Clone | undefined =>
  state.clones.find((clone) => clone.id === id);

/**
 * Get all active plugins
 */
export const selectActivePlugins = (state: AgentStore): PluginStatus[] =>
  state.pluginStatus.filter((plugin) => plugin.status === 'active');

/**
 * Check if any operation is in progress
 */
export const selectIsLoading = (state: AgentStore): boolean => state.isLoading;