import { create } from 'zustand';
import { persist, createJSONStorage } from 'zustand/middleware';
import { setActiveWorkspaceId as setApiClientWorkspaceId } from '@/api/client';

export interface WorkspaceModuleConfig {
  module_key: string;
  is_visible: boolean;
  menu_order: number;
  config: Record<string, any>;
}

export interface WorkspaceWidgetConfig {
  id: string;
  widget_key: string;
  position_x: number;
  position_y: number;
  width: number;
  height: number;
  config: Record<string, any>;
}

export interface WorkspaceInfo {
  id: string;
  name: string;
  icon: string;
  description: string | null;
  is_default: boolean;
  is_active: boolean;
  role?: 'member' | 'manager' | 'admin';
  is_user_default?: boolean;
  modules?: WorkspaceModuleConfig[];
}

export interface WorkspaceContextState {
  workspace_id: string | null;
  name?: string;
  icon?: string;
  role?: string;
  modules: { module_key: string; menu_order: number; config: Record<string, any>; is_visible?: boolean }[];
  widgets: WorkspaceWidgetConfig[];
  error?: string;
}

interface WorkspaceStoreState {
  // Active workspace ID (per-tab via sessionStorage)
  activeWorkspaceId: string | null;
  // Cached context
  context: WorkspaceContextState | null;
  // Available workspaces for the user
  myWorkspaces: WorkspaceInfo[];
  // Loading states
  isLoading: boolean;
  // Actions
  setActiveWorkspace: (id: string | null) => void;
  setContext: (ctx: WorkspaceContextState | null) => void;
  setMyWorkspaces: (workspaces: WorkspaceInfo[]) => void;
  setLoading: (loading: boolean) => void;
  // Helpers
  isModuleVisible: (moduleKey: string, isSystemAdmin?: boolean) => boolean;
  visibleModuleKeys: () => Set<string>;
  getModuleConfig: (moduleKey: string) => Record<string, any>;
  hasWorkspaces: () => boolean;
  // Reset
  reset: () => void;
}

const SESSION_STORAGE_KEY = 'leocrm-active-workspace';

export const useWorkspaceStore = create<WorkspaceStoreState>()(
  persist(
    (set, get) => ({
      activeWorkspaceId: sessionStorage.getItem(SESSION_STORAGE_KEY),
      context: null,
      myWorkspaces: [],
      isLoading: false,

      setActiveWorkspace: (id) => {
        if (id) {
          sessionStorage.setItem(SESSION_STORAGE_KEY, id);
        } else {
          sessionStorage.removeItem(SESSION_STORAGE_KEY);
        }
        setApiClientWorkspaceId(id);
        set({ activeWorkspaceId: id, context: null });
      },

      setContext: (ctx) => set({ context: ctx }),

      setMyWorkspaces: (workspaces) => set({ myWorkspaces: workspaces }),

      setLoading: (loading) => set({ isLoading: loading }),

      isModuleVisible: (moduleKey: string, isSystemAdmin?: boolean) => {
        // System admins see all modules regardless of workspace
        if (isSystemAdmin) return true;
        // While permissions are loading, show nothing (fail-closed)
        if (isSystemAdmin === undefined) return false;
        // If no workspace context, show all (backward compatible)
        const ctx = get().context;
        if (!ctx?.workspace_id || !ctx?.modules?.length) return true;
        return get().visibleModuleKeys().has(moduleKey);
      },

      visibleModuleKeys: () => {
        const ctx = get().context;
        // ARCH-004: respect is_visible=false from workspace module config.
        // Modules without the flag stay visible (backward compatible).
        return new Set(
          (ctx?.modules ?? [])
            .filter(m => m.is_visible !== false)
            .map(m => m.module_key)
        );
      },

      getModuleConfig: (moduleKey: string) => {
        // N3: scope defaults (e.g. default_saved_view_id, default_view) come
        // from the active workspace context; no context = no defaults.
        const ctx = get().context;
        const mod = (ctx?.modules ?? []).find(m => m.module_key === moduleKey);
        return mod?.config ?? {};
      },

      hasWorkspaces: () => get().myWorkspaces.length > 0,

      reset: () => {
        sessionStorage.removeItem(SESSION_STORAGE_KEY);
        set({ activeWorkspaceId: null, context: null, myWorkspaces: [], isLoading: false });
      },
    }),
    {
      name: 'leocrm-workspace-store',
      storage: createJSONStorage(() => sessionStorage),
      partialize: (state) => ({ activeWorkspaceId: state.activeWorkspaceId }),
    }
  )
);