/*
 * File: predictionsSlice.ts
 * Description: Redux slice for managing AI predictions state
 * Design & Developed by Tech4Biz Solutions
 * Copyright (c) Spurrin Innovations. All rights reserved.
 */

import { createSlice, createAsyncThunk, PayloadAction } from '@reduxjs/toolkit';
import { predictionsAPI } from '../services/predictionsAPI';
import type { PredictionsResponse, PredictionData, PredictionTabType } from '../types/predictions';

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

/**
 * Fetch All Predictions Async Thunk
 * 
 * Purpose: Fetch all predictions and handle filtering on frontend
 */
export const fetchAllPredictions = createAsyncThunk(
  'predictions/fetchAll',
  async (token: string, { rejectWithValue }) => {
    try {
      const response :any = await predictionsAPI.fetchAllPredictions(token);
      console.log('dashboard predction data response', response);
      if (response.ok && response.data && response.data.data) {
        return response.data.data as PredictionData[];
      } else {
        return rejectWithValue(response.problem || 'Failed to fetch predictions');
      }
    } catch (error) {
      return rejectWithValue('Network error occurred while fetching predictions');
    }
  }
);

// ============================================================================
// STATE INTERFACE
// ============================================================================

interface PredictionsState {
  // Data
  allPredictions: PredictionData[];
  predictionsWithFeedback: PredictionData[];
  predictionsWithoutFeedback: PredictionData[];
  
  // Loading states
  isLoading: boolean;
  
  // Error states
  error: string | null;
  
  // UI state
  activeTab: PredictionTabType;
  searchQuery: string;
}

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

const initialState: PredictionsState = {
  // Data
  allPredictions: [],
  predictionsWithFeedback: [],
  predictionsWithoutFeedback: [],
  
  // Loading states
  isLoading: false,
  
  // Error states
  error: null,
  
  // UI state
  activeTab: 'with-feedback',
  searchQuery: '',
};

// ============================================================================
// PREDICTIONS SLICE
// ============================================================================

const predictionsSlice = createSlice({
  name: 'predictions',
  initialState,
  reducers: {
    /**
     * Set Active Tab
     * 
     * Purpose: Switch between feedback tabs
     */
    setActiveTab: (state, action: PayloadAction<PredictionTabType>) => {
      state.activeTab = action.payload;
    },

    /**
     * Set Search Query
     * 
     * Purpose: Update search query for filtering
     */
    setSearchQuery: (state, action: PayloadAction<string>) => {
      state.searchQuery = action.payload;
    },

    /**
     * Clear Errors
     * 
     * Purpose: Clear error states
     */
    clearErrors: (state) => {
      state.error = null;
    },

    /**
     * Clear Search
     * 
     * Purpose: Clear search query
     */
    clearSearch: (state) => {
      state.searchQuery = '';
    },

    /**
     * Filter Predictions
     * 
     * Purpose: Filter predictions based on feedback status
     */
    filterPredictions: (state) => {
      // Filter predictions with feedback
      state.predictionsWithFeedback = state.allPredictions.filter(
        prediction => prediction.has_provided_feedback
      );
      
      // Filter predictions without feedback
      state.predictionsWithoutFeedback = state.allPredictions.filter(
        prediction => !prediction.has_provided_feedback
      );
    },
  },
  extraReducers: (builder) => {
    // ============================================================================
    // FETCH ALL PREDICTIONS
    // ============================================================================
    
    // Pending
    builder.addCase(fetchAllPredictions.pending, (state) => {
      state.isLoading = true;
      state.error = null;
    });

    // Fulfilled
    builder.addCase(fetchAllPredictions.fulfilled, (state, action: PayloadAction<PredictionData[]>) => {
      state.isLoading = false;
      state.allPredictions = action.payload;
      state.error = null;
      
      // Debug logging to see what's happening with feedback filtering
      console.log('🔍 Predictions filtering debug:');
      console.log('Total predictions:', action.payload.length);
      console.log('Predictions with feedback field:', action.payload.filter(p => p.has_provided_feedback).length);
      console.log('Predictions with feedbacks array:', action.payload.filter(p => p.feedbacks && p.feedbacks.length > 0).length);
      console.log('Sample prediction feedback data:', action.payload.slice(0, 2).map(p => ({
        id: p.id,
        has_provided_feedback: p.has_provided_feedback,
        feedbacks_count: p.feedbacks?.length || 0,
        user_feedback_count: p.user_feedback_count
      })));
      
      // Automatically filter predictions after fetching
      // Primary filter: use has_provided_feedback field
      // Fallback filter: check if feedbacks array has items
      state.predictionsWithFeedback = action.payload.filter(
        prediction => prediction.has_provided_feedback || (prediction.feedbacks && prediction.feedbacks.length > 0)
      );
      state.predictionsWithoutFeedback = action.payload.filter(
        prediction => !prediction.has_provided_feedback && (!prediction.feedbacks || prediction.feedbacks.length === 0)
      );
      
      console.log('Filtered results:');
      console.log('With feedback tab:', state.predictionsWithFeedback.length);
      console.log('Without feedback tab:', state.predictionsWithoutFeedback.length);
    });

    // Rejected
    builder.addCase(fetchAllPredictions.rejected, (state, action) => {
      state.isLoading = false;
      state.error = action.error.message || 'Failed to fetch predictions';
    });
  },
});

// ============================================================================
// ACTIONS
// ============================================================================

export const {
  setActiveTab,
  setSearchQuery,
  clearErrors,
  clearSearch,
  filterPredictions,
} = predictionsSlice.actions;

// ============================================================================
// SELECTORS
// ============================================================================

export const selectActiveTab = (state: { predictions: PredictionsState }) => state.predictions.activeTab;
export const selectSearchQuery = (state: { predictions: PredictionsState }) => state.predictions.searchQuery;

export const selectAllPredictions = (state: { predictions: PredictionsState }) => state.predictions.allPredictions;
export const selectPredictionsWithFeedback = (state: { predictions: PredictionsState }) => state.predictions.predictionsWithFeedback;
export const selectPredictionsWithoutFeedback = (state: { predictions: PredictionsState }) => state.predictions.predictionsWithoutFeedback;

export const selectIsLoading = (state: { predictions: PredictionsState }) => state.predictions.isLoading;
export const selectError = (state: { predictions: PredictionsState }) => state.predictions.error;

export const selectCurrentPredictions = (state: { predictions: PredictionsState }) => {
  const { activeTab, predictionsWithFeedback, predictionsWithoutFeedback } = state.predictions;
  return activeTab === 'with-feedback' ? predictionsWithFeedback : predictionsWithoutFeedback;
};

export const selectCurrentLoadingState = (state: { predictions: PredictionsState }) => {
  return state.predictions.isLoading;
};

export const selectCurrentError = (state: { predictions: PredictionsState }) => {
  return state.predictions.error;
};

// ============================================================================
// EXPORT
// ============================================================================

export default predictionsSlice.reducer;

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