import 'package:built_collection/built_collection.dart';
import 'package:invoiceninja_flutter/redux/app/app_actions.dart';
import 'package:redux/redux.dart';
import 'package:invoiceninja_flutter/data/models/models.dart';
import 'package:invoiceninja_flutter/redux/company/company_actions.dart';
import 'package:invoiceninja_flutter/redux/ui/entity_ui_state.dart';
import 'package:invoiceninja_flutter/redux/ui/list_ui_state.dart';
import 'package:invoiceninja_flutter/redux/expense/expense_actions.dart';
import 'package:invoiceninja_flutter/redux/expense/expense_state.dart';

EntityUIState expenseUIReducer(ExpenseUIState state, dynamic action) {
  return state.rebuild((b) => b
    ..listUIState.replace(expenseListReducer(state.listUIState, action))
    ..editing.replace(editingReducer(state.editing, action))
    ..selectedId = selectedIdReducer(state.selectedId, action));
}

Reducer<String> selectedIdReducer = combineReducers([
  TypedReducer<String, ViewExpense>((selectedId, action) => action.expenseId),
  TypedReducer<String, AddExpenseSuccess>(
      (selectedId, action) => action.expense.id),
  TypedReducer<String, SelectCompany>(
      (selectedId, action) => action.clearSelection ? '' : selectedId),
  TypedReducer<String, DeleteExpenseSuccess>((selectedId, action) => ''),
  TypedReducer<String, ArchiveExpenseSuccess>((selectedId, action) => ''),
  TypedReducer<String, ClearEntityFilter>((selectedId, action) => ''),
]);

final editingReducer = combineReducers<ExpenseEntity>([
  TypedReducer<ExpenseEntity, SaveExpenseSuccess>(_updateEditing),
  TypedReducer<ExpenseEntity, AddExpenseSuccess>(_updateEditing),
  TypedReducer<ExpenseEntity, RestoreExpenseSuccess>((expenses, action) {
    return action.expenses[0];
  }),
  TypedReducer<ExpenseEntity, ArchiveExpenseSuccess>((expenses, action) {
    return action.expenses[0];
  }),
  TypedReducer<ExpenseEntity, DeleteExpenseSuccess>((expenses, action) {
    return action.expenses[0];
  }),
  TypedReducer<ExpenseEntity, EditExpense>(_updateEditing),
  TypedReducer<ExpenseEntity, UpdateExpense>((expense, action) {
    return action.expense.rebuild((b) => b..isChanged = true);
  }),
  TypedReducer<ExpenseEntity, DiscardChanges>(_clearEditing),
]);

ExpenseEntity _clearEditing(ExpenseEntity expense, dynamic action) {
  return ExpenseEntity();
}

ExpenseEntity _updateEditing(ExpenseEntity expense, dynamic action) {
  return action.expense;
}

final expenseListReducer = combineReducers<ListUIState>([
  TypedReducer<ListUIState, SortExpenses>(_sortExpenses),
  TypedReducer<ListUIState, FilterExpensesByState>(_filterExpensesByState),
  TypedReducer<ListUIState, FilterExpensesByStatus>(_filterExpensesByStatus),
  TypedReducer<ListUIState, FilterExpenses>(_filterExpenses),
  TypedReducer<ListUIState, FilterExpensesByCustom1>(_filterExpensesByCustom1),
  TypedReducer<ListUIState, FilterExpensesByCustom2>(_filterExpensesByCustom2),
  TypedReducer<ListUIState, FilterExpensesByCustom3>(_filterExpensesByCustom3),
  TypedReducer<ListUIState, FilterExpensesByCustom4>(_filterExpensesByCustom4),
  TypedReducer<ListUIState, StartExpenseMultiselect>(_startListMultiselect),
  TypedReducer<ListUIState, AddToExpenseMultiselect>(_addToListMultiselect),
  TypedReducer<ListUIState, RemoveFromExpenseMultiselect>(
      _removeFromListMultiselect),
  TypedReducer<ListUIState, ClearExpenseMultiselect>(_clearListMultiselect),
]);

ListUIState _filterExpensesByCustom1(
    ListUIState expenseListState, FilterExpensesByCustom1 action) {
  if (expenseListState.custom1Filters.contains(action.value)) {
    return expenseListState
        .rebuild((b) => b..custom1Filters.remove(action.value));
  } else {
    return expenseListState.rebuild((b) => b..custom1Filters.add(action.value));
  }
}

ListUIState _filterExpensesByCustom2(
    ListUIState expenseListState, FilterExpensesByCustom2 action) {
  if (expenseListState.custom2Filters.contains(action.value)) {
    return expenseListState
        .rebuild((b) => b..custom2Filters.remove(action.value));
  } else {
    return expenseListState.rebuild((b) => b..custom2Filters.add(action.value));
  }
}

ListUIState _filterExpensesByCustom3(
    ListUIState expenseListState, FilterExpensesByCustom3 action) {
  if (expenseListState.custom3Filters.contains(action.value)) {
    return expenseListState
        .rebuild((b) => b..custom3Filters.remove(action.value));
  } else {
    return expenseListState.rebuild((b) => b..custom3Filters.add(action.value));
  }
}

ListUIState _filterExpensesByCustom4(
    ListUIState expenseListState, FilterExpensesByCustom4 action) {
  if (expenseListState.custom4Filters.contains(action.value)) {
    return expenseListState
        .rebuild((b) => b..custom4Filters.remove(action.value));
  } else {
    return expenseListState.rebuild((b) => b..custom4Filters.add(action.value));
  }
}

ListUIState _filterExpensesByState(
    ListUIState expenseListState, FilterExpensesByState action) {
  if (expenseListState.stateFilters.contains(action.state)) {
    return expenseListState
        .rebuild((b) => b..stateFilters.remove(action.state));
  } else {
    return expenseListState.rebuild((b) => b..stateFilters.add(action.state));
  }
}

ListUIState _filterExpensesByStatus(
    ListUIState expenseListState, FilterExpensesByStatus action) {
  if (expenseListState.statusFilters.contains(action.status)) {
    return expenseListState
        .rebuild((b) => b..statusFilters.remove(action.status));
  } else {
    return expenseListState.rebuild((b) => b..statusFilters.add(action.status));
  }
}

ListUIState _filterExpenses(
    ListUIState expenseListState, FilterExpenses action) {
  return expenseListState.rebuild((b) => b
    ..filter = action.filter
    ..filterClearedAt = action.filter == null
        ? DateTime.now().millisecondsSinceEpoch
        : expenseListState.filterClearedAt);
}

ListUIState _sortExpenses(ListUIState expenseListState, SortExpenses action) {
  return expenseListState.rebuild((b) => b
    ..sortAscending = b.sortField != action.field || !b.sortAscending
    ..sortField = action.field);
}

ListUIState _startListMultiselect(
    ListUIState expenseListState, StartExpenseMultiselect action) {
  return expenseListState.rebuild((b) => b..selectedIds = ListBuilder());
}

ListUIState _addToListMultiselect(
    ListUIState expenseListState, AddToExpenseMultiselect action) {
  return expenseListState.rebuild((b) => b..selectedIds.add(action.entity.id));
}

ListUIState _removeFromListMultiselect(
    ListUIState expenseListState, RemoveFromExpenseMultiselect action) {
  return expenseListState
      .rebuild((b) => b..selectedIds.remove(action.entity.id));
}

ListUIState _clearListMultiselect(
    ListUIState expenseListState, ClearExpenseMultiselect action) {
  return expenseListState.rebuild((b) => b..selectedIds = null);
}

final expensesReducer = combineReducers<ExpenseState>([
  TypedReducer<ExpenseState, SaveExpenseSuccess>(_updateExpense),
  TypedReducer<ExpenseState, AddExpenseSuccess>(_addExpense),
  TypedReducer<ExpenseState, LoadExpensesSuccess>(_setLoadedExpenses),
  TypedReducer<ExpenseState, LoadCompanySuccess>(_setLoadedCompany),
  TypedReducer<ExpenseState, LoadExpenseSuccess>(_setLoadedExpense),
  TypedReducer<ExpenseState, ArchiveExpenseRequest>(_archiveExpenseRequest),
  TypedReducer<ExpenseState, ArchiveExpenseSuccess>(_archiveExpenseSuccess),
  TypedReducer<ExpenseState, ArchiveExpenseFailure>(_archiveExpenseFailure),
  TypedReducer<ExpenseState, DeleteExpenseRequest>(_deleteExpenseRequest),
  TypedReducer<ExpenseState, DeleteExpenseSuccess>(_deleteExpenseSuccess),
  TypedReducer<ExpenseState, DeleteExpenseFailure>(_deleteExpenseFailure),
  TypedReducer<ExpenseState, RestoreExpenseRequest>(_restoreExpenseRequest),
  TypedReducer<ExpenseState, RestoreExpenseSuccess>(_restoreExpenseSuccess),
  TypedReducer<ExpenseState, RestoreExpenseFailure>(_restoreExpenseFailure),
]);

ExpenseState _archiveExpenseRequest(
    ExpenseState expenseState, ArchiveExpenseRequest action) {
  final expenses = action.expenseIds.map((id) => expenseState.map[id]).toList();

  for (int i = 0; i < expenses.length; i++) {
    expenses[i] = expenses[i]
        .rebuild((b) => b..archivedAt = DateTime.now().millisecondsSinceEpoch);
  }
  return expenseState.rebuild((b) {
    for (final expense in expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _archiveExpenseSuccess(
    ExpenseState expenseState, ArchiveExpenseSuccess action) {
  return expenseState.rebuild((b) {
    for (final expense in action.expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _archiveExpenseFailure(
    ExpenseState expenseState, ArchiveExpenseFailure action) {
  return expenseState.rebuild((b) {
    for (final expense in action.expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _deleteExpenseRequest(
    ExpenseState expenseState, DeleteExpenseRequest action) {
  final expenses = action.expenseIds.map((id) => expenseState.map[id]).toList();

  for (int i = 0; i < expenses.length; i++) {
    expenses[i] = expenses[i].rebuild((b) => b
      ..archivedAt = DateTime.now().millisecondsSinceEpoch
      ..isDeleted = true);
  }
  return expenseState.rebuild((b) {
    for (final expense in expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _deleteExpenseSuccess(
    ExpenseState expenseState, DeleteExpenseSuccess action) {
  return expenseState.rebuild((b) {
    for (final expense in action.expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _deleteExpenseFailure(
    ExpenseState expenseState, DeleteExpenseFailure action) {
  return expenseState.rebuild((b) {
    for (final expense in action.expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _restoreExpenseRequest(
    ExpenseState expenseState, RestoreExpenseRequest action) {
  final expenses = action.expenseIds.map((id) => expenseState.map[id]).toList();

  for (int i = 0; i < expenses.length; i++) {
    expenses[i] = expenses[i].rebuild((b) => b
      ..archivedAt = 0
      ..isDeleted = false);
  }
  return expenseState.rebuild((b) {
    for (final expense in expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _restoreExpenseSuccess(
    ExpenseState expenseState, RestoreExpenseSuccess action) {
  return expenseState.rebuild((b) {
    for (final expense in action.expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _restoreExpenseFailure(
    ExpenseState expenseState, RestoreExpenseFailure action) {
  return expenseState.rebuild((b) {
    for (final expense in action.expenses) {
      b.map[expense.id] = expense;
    }
  });
}

ExpenseState _addExpense(ExpenseState expenseState, AddExpenseSuccess action) {
  return expenseState.rebuild((b) => b
    ..map[action.expense.id] = action.expense
    ..list.add(action.expense.id));
}

ExpenseState _updateExpense(
    ExpenseState expenseState, SaveExpenseSuccess action) {
  return expenseState
      .rebuild((b) => b..map[action.expense.id] = action.expense);
}

ExpenseState _setLoadedExpense(
    ExpenseState expenseState, LoadExpenseSuccess action) {
  return expenseState
      .rebuild((b) => b..map[action.expense.id] = action.expense);
}

ExpenseState _setLoadedExpenses(
        ExpenseState expenseState, LoadExpensesSuccess action) =>
    expenseState.loadExpenses(action.expenses);

ExpenseState _setLoadedCompany(
    ExpenseState expenseState, LoadCompanySuccess action) {
  final company = action.userCompany.company;
  return expenseState.loadExpenses(company.expenses);
}