/*
 * File: hospitalSlice.ts
 * Description: Redux slice for Hospital state management (non-persisted)
 * Design & Developed by Tech4Biz Solutions
 * Copyright (c) Spurrin Innovations. All rights reserved.
 */

import { createSlice, createAsyncThunk, PayloadAction } from '@reduxjs/toolkit';
import { authAPI } from '../services/authAPI';
import { showError } from '../../../shared/utils/toast';

// ============================================================================
// INTERFACES
// ============================================================================

/**
 * Hospital Interface
 * 
 * Purpose: Defines the structure for hospital data
 */
interface Hospital {
  hospital_id: string | null;
  hospital_name: string | null;
}

/**
 * Hospital State Interface
 * 
 * Purpose: Defines the structure for hospital state
 */
interface HospitalState {
  hospitals: Hospital[] | null;
  loading: boolean;
  error: string | null;
}

// ============================================================================
// ASYNC THUNKS
// ============================================================================

/**
 * Fetch Hospitals Async Thunk
 * 
 * Purpose: Fetch hospital list from API
 * 
 * Features:
 * - API integration with error handling
 * - Loading state management
 * - Toast notifications for errors
 * - Automatic state updates
 */
export const fetchHospitals = createAsyncThunk(
  'hospital/fetchHospitals',
  async (_, { rejectWithValue }) => {
    try {
      const response: any = await authAPI.gethospitals();
      console.log('hospital response', response);
      
      if (response.ok && response.data && response.data.data) {
        return response.data.data;
      } else {
        showError('Error while fetching hospital list');
        return rejectWithValue('Failed to fetch hospitals');
      }
    } catch (error: any) {
      console.log('Hospital fetch error:', error);
      showError('Error while fetching hospital list');
      return rejectWithValue(error.message || 'Network error');
    }
  }
);

// ============================================================================
// INITIAL STATE
// ============================================================================

const initialState: HospitalState = {
  hospitals: [],
  loading: false,
  error: null,
};

// ============================================================================
// HOSPITAL SLICE
// ============================================================================

/**
 * Hospital Slice
 * 
 * Purpose: Manages hospital-related state
 * 
 * Features:
 * - Hospital list management
 * - Loading states for API calls
 * - Error handling and display
 * - Non-persisted state (not stored in AsyncStorage)
 */
const hospitalSlice = createSlice({
  name: 'hospital',
  initialState,
  reducers: {
    /**
     * Set Hospitals Action
     * 
     * Purpose: Manually set hospital list
     */
    setHospitals(state, action: PayloadAction<Hospital[]>) {
      state.hospitals = action.payload;
      state.loading = false;
      state.error = null;
    },

    /**
     * Clear Hospitals Action
     * 
     * Purpose: Clear hospital list and reset state
     */
    clearHospitals(state) {
      state.hospitals = [];
      state.loading = false;
      state.error = null;
    },

    /**
     * Clear Error Action
     * 
     * Purpose: Clear error state
     */
    clearError(state) {
      state.error = null;
    },
  },
  extraReducers: (builder) => {
    builder
      // Fetch Hospitals - Pending
      .addCase(fetchHospitals.pending, (state) => {
        state.loading = true;
        state.error = null;
      })
      // Fetch Hospitals - Fulfilled
      .addCase(fetchHospitals.fulfilled, (state, action) => {
        state.loading = false;
        state.hospitals = action.payload;
        state.error = null;
      })
      // Fetch Hospitals - Rejected
      .addCase(fetchHospitals.rejected, (state, action) => {
        state.loading = false;
        state.error = action.payload as string || 'Failed to fetch hospitals';
      });
  },
});

// ============================================================================
// EXPORTS
// ============================================================================

export const {
  setHospitals,
  clearHospitals,
  clearError,
} = hospitalSlice.actions;

export default hospitalSlice.reducer;

/*
 * End of File: hospitalSlice.ts
 * Design & Developed by Tech4Biz Solutions
 * Copyright (c) Spurrin Innovations. All rights reserved.
 */