import { RejectedActionPayload, ServerErrorResponse } from '@/interface/Shared';
import {
  SalaryAdjustment,
  CreateSalaryAdjustmentPayload,
  UpdateSalaryAdjustmentPayload,
  DeleteSalaryAdjustmentPayload,
} from '@/interface/SalaryAdjustment';
import Helpers from '@/utilities/Helpers';
import { createAsyncThunk, createSlice, Draft, PayloadAction } from '@reduxjs/toolkit';
import { message } from 'antd';
import { SalaryAdjustmentsActions } from './actionTypes';
import { apiDelete, apiGet, apiPost, apiPut } from '@/services/api/api';
import axios, { AxiosResponse } from 'axios';

interface SalaryAdjustmentsState {
  adjustments: SalaryAdjustment[];
  loading: boolean;
  error: string | null;
}

const initialState: SalaryAdjustmentsState = {
  adjustments: [],
  loading: false,
  error: null,
};

export const fetchSalaryAdjustments = createAsyncThunk(
  SalaryAdjustmentsActions.FETCH_ADJUSTMENTS_REQUEST,
  async (params?: { employee_id?: string; status?: string; adjustment_type?: string }) => {
    const queryParams = new URLSearchParams();
    if (params?.employee_id) queryParams.append('employee_id', params.employee_id);
    if (params?.status) queryParams.append('status', params.status);
    if (params?.adjustment_type) queryParams.append('adjustment_type', params.adjustment_type);
    const query = queryParams.toString() ? `?${queryParams.toString()}` : '';
    const response = (await apiGet(
      `/payroll/salary-adjustments${query}`,
    )) as AxiosResponse<SalaryAdjustment[]>;
    return response.data;
  },
);

export const createSalaryAdjustment = createAsyncThunk(
  SalaryAdjustmentsActions.CREATE_ADJUSTMENT_REQUEST,
  async (payload: CreateSalaryAdjustmentPayload, { rejectWithValue }) => {
    try {
      const response = (await apiPost(
        '/payroll/salary-adjustments',
        payload,
      )) as AxiosResponse<{ data: SalaryAdjustment }>;
      return response.data.data;
    } catch (error) {
      if (axios.isAxiosError(error) && error.response) {
        return rejectWithValue(error.response.data as ServerErrorResponse);
      }
      throw error;
    }
  },
);

export const updateSalaryAdjustment = createAsyncThunk(
  SalaryAdjustmentsActions.UPDATE_ADJUSTMENT_REQUEST,
  async (payload: UpdateSalaryAdjustmentPayload, { rejectWithValue }) => {
    try {
      const { id, ...data } = payload;
      const response = (await apiPut(
        `/payroll/salary-adjustments/${id}`,
        data,
      )) as AxiosResponse<{ data: SalaryAdjustment }>;
      return response.data.data;
    } catch (error) {
      if (axios.isAxiosError(error) && error.response) {
        return rejectWithValue(error.response.data as ServerErrorResponse);
      }
      throw error;
    }
  },
);

export const deleteSalaryAdjustment = createAsyncThunk(
  SalaryAdjustmentsActions.DELETE_ADJUSTMENT_REQUEST,
  async (id: string) => {
    const response = (await apiDelete(
      `/payroll/salary-adjustments/${id}`,
    )) as AxiosResponse<DeleteSalaryAdjustmentPayload>;
    const responseData = response.data;
    responseData.id = id;
    return responseData;
  },
);

export const approveSalaryAdjustment = createAsyncThunk(
  SalaryAdjustmentsActions.APPROVE_ADJUSTMENT_REQUEST,
  async (id: string, { rejectWithValue }) => {
    try {
      const response = (await apiPost(
        `/payroll/salary-adjustments/${id}/approve`,
        {},
      )) as AxiosResponse<{ data: SalaryAdjustment }>;
      return response.data.data;
    } catch (error) {
      if (axios.isAxiosError(error) && error.response) {
        return rejectWithValue(error.response.data as ServerErrorResponse);
      }
      throw error;
    }
  },
);

export const SalaryAdjustmentsSlice = createSlice({
  name: 'salaryAdjustments',
  initialState,
  reducers: {},
  extraReducers(builder) {
    builder
      .addCase(fetchSalaryAdjustments.pending, (state: Draft<SalaryAdjustmentsState>) => {
        state.loading = true;
        state.error = null;
      })
      .addCase(
        fetchSalaryAdjustments.fulfilled,
        (state: Draft<SalaryAdjustmentsState>, action: PayloadAction<SalaryAdjustment[]>) => {
          state.adjustments = action.payload;
          state.loading = false;
          state.error = null;
        },
      )
      .addCase(fetchSalaryAdjustments.rejected, (state: Draft<SalaryAdjustmentsState>, action: RejectedActionPayload) => {
        state.loading = false;
        state.error = 'Failed to load salary adjustments';
        message.error(Helpers.handleServerError(action.payload), 8);
      });

    builder
      .addCase(createSalaryAdjustment.pending, (state: Draft<SalaryAdjustmentsState>) => {
        state.loading = true;
        state.error = null;
      })
      .addCase(
        createSalaryAdjustment.fulfilled,
        (state: Draft<SalaryAdjustmentsState>, action: PayloadAction<SalaryAdjustment>) => {
          const normalized = {
            ...action.payload,
            status: action.payload.status ?? 'pending',
          };
          state.adjustments.unshift(normalized);
          state.loading = false;
          state.error = null;
          message.success('Salary adjustment created successfully');
        },
      )
      .addCase(
        createSalaryAdjustment.rejected,
        (state: Draft<SalaryAdjustmentsState>, action: RejectedActionPayload) => {
          state.loading = false;
          state.error = Helpers.handleServerError(action.payload);
          message.error(Helpers.handleServerError(action.payload), 10);
        },
      );

    builder
      .addCase(updateSalaryAdjustment.pending, (state: Draft<SalaryAdjustmentsState>) => {
        state.loading = true;
        state.error = null;
      })
      .addCase(
        updateSalaryAdjustment.fulfilled,
        (state: Draft<SalaryAdjustmentsState>, action: PayloadAction<SalaryAdjustment>) => {
          const index = state.adjustments.findIndex((a) => a.id === action.payload.id);
          if (index !== -1) state.adjustments[index] = action.payload;
          state.loading = false;
          state.error = null;
          message.success('Salary adjustment updated successfully');
        },
      )
      .addCase(
        updateSalaryAdjustment.rejected,
        (state: Draft<SalaryAdjustmentsState>, action: RejectedActionPayload) => {
          state.loading = false;
          state.error = Helpers.handleServerError(action.payload);
          message.error(Helpers.handleServerError(action.payload), 10);
        },
      );

    builder
      .addCase(deleteSalaryAdjustment.pending, (state: Draft<SalaryAdjustmentsState>) => {
        state.loading = true;
      })
      .addCase(
        deleteSalaryAdjustment.fulfilled,
        (
          state: Draft<SalaryAdjustmentsState>,
          action: PayloadAction<DeleteSalaryAdjustmentPayload>,
        ) => {
          state.adjustments = state.adjustments.filter((a) => a.id !== action.payload.id);
          state.loading = false;
          message.success(action.payload.message);
        },
      )
      .addCase(deleteSalaryAdjustment.rejected, (state: Draft<SalaryAdjustmentsState>, action: RejectedActionPayload) => {
        state.loading = false;
        state.error = 'Failed to delete salary adjustment';
        message.error(Helpers.handleServerError(action.payload), 8);
      });

    builder
      .addCase(approveSalaryAdjustment.pending, (state: Draft<SalaryAdjustmentsState>) => {
        state.loading = true;
      })
      .addCase(
        approveSalaryAdjustment.fulfilled,
        (state: Draft<SalaryAdjustmentsState>, action: PayloadAction<SalaryAdjustment>) => {
          const index = state.adjustments.findIndex((a) => a.id === action.payload.id);
          if (index !== -1) state.adjustments[index] = action.payload;
          state.loading = false;
          message.success('Salary adjustment approved successfully');
        },
      )
      .addCase(
        approveSalaryAdjustment.rejected,
        (state: Draft<SalaryAdjustmentsState>, action: RejectedActionPayload) => {
          state.loading = false;
          state.error = Helpers.handleServerError(action.payload);
          message.error(Helpers.handleServerError(action.payload), 10);
        },
      );
  },
});

export default SalaryAdjustmentsSlice;
export type { SalaryAdjustmentsState };