module AccessbankPdfHelpers

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 114
def error(msg)
  { status: 400, message: msg }
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 39
def get_account_name(pdf_array)

  pdf_array.each do |row|
    row.each_with_index do |cell, index|
      if cell == 'Account Name'
        return row[index + 1]
      end
    end
  end

  return nil
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 53
def get_account_number(pdf_array)

  pdf_array.each do |row|
    row.each do |cell|
      if cell =~ /[0-9]{10}/
        return cell
      end
    end
  end

  return nil
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 67
def get_date_range(pdf_array)
  pdf_array.each_with_index do |row, index|
    if row.count == 1
      if row.first =~ /([0-3][0-9])[\/]([0-1][0-9])[\/]([0-9]{4})/ and pdf_array[index + 1].first =~ /([0-3][0-9])[\/]([0-1][0-9])[\/]([0-9]{4})/
        return { from: row.first, to: pdf_array[index + 1].first }
      end
    end
  end

  return nil
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 16
def get_details(pdf_array)

  details = Hash.new

  details[:bank_name] = 'Access Bank'
  details[:account_number] = get_account_number(pdf_array)
  details[:account_name] =  get_account_name(pdf_array)

  date_range = get_date_range(pdf_array)

  details[:from_date] = string_with_slash_to_date(date_range[:from])
  details[:to_date] = string_with_slash_to_date(date_range[:to])
  details[:transactions] = get_transactions(pdf_array)

  return details
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 80
def get_transactions(pdf_array)
  start_index = get_first_line_of_transactions(pdf_array)
  transactions = []

  opening_balance = pdf_array[1][1]

  pdf_array[start_index..-1].each do |transaction|
    if valid_transaction?(transaction)

      transaction_hash= Hash.new
      transaction_hash[:date] = string_with_dash_to_date(transaction[0])
      transaction_hash[:remarks] = transaction[2]

      if transaction.count == 6 # ref code present
        transaction_hash[:ref] = transaction[3]
        transaction_hash[:amount] = amount_to_f(transaction[4])
        transaction_hash[:balance] = amount_to_f(transaction[5])
        transaction_hash[:type] = transaction_type(transaction_hash[:balance], opening_balance)
      else #no ref code
        transaction_hash[:ref] = ''
        transaction_hash[:amount] = amount_to_f(transaction[3])
        transaction_hash[:balance] = amount_to_f(transaction[4])
        transaction_hash[:type] = transaction_type(transaction_hash[:balance], opening_balance)
      end

      opening_balance = transaction_hash[:balance]
      transactions << transaction_hash
    end
  end

  return transactions
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 34
def has_valid_details?(pdf_array)
  return (get_account_number(pdf_array) and get_account_name(pdf_array) and get_date_range(pdf_array))
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 3
def pdf_to_a(pdf)
  lines = []

  pdf.pages.each do |page|
    remove_line_spacing(page.text).each do |line|
      lines << line.strip.split(/\s\s+/)
    end
  end

  return lines
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 118
def success(data)
  { status: 200, data: data }
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 136
def amount_to_f(amount)
  amount.gsub(/[^\d\.]/, '').to_f
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 141
def get_first_line_of_transactions(pdf_array)
  start = -1

  pdf_array.each_with_index do |row, index|
     start = index + 1 if row[0] == 'Date'
  end

  return start
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 124
def remove_line_spacing(str)
  str.gsub(/^$\n/, '').lines
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 157
def string_with_dash_to_date(date_str)
  Date.strptime(date_str, '%d-%b-%y')
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 162
def string_with_slash_to_date(date_str)
  Date.strptime(date_str, '%d/%m/%Y')
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 129
def transaction_type(current_balance, former_balance)
  former_balance = amount_to_f(former_balance) if former_balance.is_a?(String)

  current_balance - former_balance > 1 ? 'credit' : 'debit'
end

# File lib/ng-bank-parser/parsers/accessbank-pdf-parser/helpers.rb, line 152
def valid_transaction?(line)
  line[0] =~ /([0-3][0-9])[\-]([a-zA-Z]+)[\-](1[0-9])/ #first column matches access bank transaction date pattern
end