require "spec_helper"
require "monetize"

describe Monetize do

  bar = '{ "priority": 1, "iso_code": "BAR", "iso_numeric": "840", "name": "Dollar with 4 decimal places", "symbol": "$", "subunit": "Cent", "subunit_to_unit": 10000, "symbol_first": true, "html_entity": "$", "decimal_mark": ".", "thousands_separator": "," }'
  eu4 = '{ "priority": 1, "iso_code": "EU4", "iso_numeric": "841", "name": "Euro with 4 decimal places", "symbol": "€", "subunit": "Cent", "subunit_to_unit": 10000, "symbol_first": true, "html_entity": "€", "decimal_mark": ",", "thousands_separator": "." }'

  describe ".parse" do

    it "parses european-formatted inputs under 10EUR" do
      expect(Monetize.parse('EUR 5,95')).to eq Money.new(595, 'EUR')
    end

    it "parses european-formatted inputs with multiple thousands-seperators" do
      expect(Monetize.parse('EUR 1.234.567,89')).to eq Money.new(123456789, 'EUR')
      expect(Monetize.parse('EUR 1.111.234.567,89')).to eq Money.new(111123456789, 'EUR')
    end

    describe 'currency assumption' do
      context 'opted in' do
        before do
          Money.assume_from_symbol = true
        end

        it "parses formatted inputs with the currency passed as a symbol" do
          original_currency = Money.default_currency
          Money.default_currency = "EUR"
          Money.default_currency = original_currency
          expect(Monetize.parse("€5.95")).to eq Money.new(595, 'EUR')
          expect(Monetize.parse(" €5.95 ")).to eq Money.new(595, 'EUR')
          expect(Monetize.parse("£9.99")).to eq Money.new(999, 'GBP')
        end

        it 'should assume default currency if not a recognised symbol' do
          expect(Monetize.parse("L9.99")).to eq Money.new(999, 'USD')
        end
      end
      context 'opted out' do
        before do
          Money.assume_from_symbol = false
        end
        it "parses formatted inputs with the currency passed as a symbol but ignores the symbol" do
          expect(Monetize.parse("$5.95")).to eq Money.new(595, 'USD')
          expect(Monetize.parse("€5.95")).to eq Money.new(595, 'USD')
          expect(Monetize.parse(" €5.95 ")).to eq Money.new(595, 'USD')
          expect(Monetize.parse("£9.99")).to eq Money.new(999, 'USD')

        end
      end
      it 'should opt out by default' do
        expect(Money.assume_from_symbol).to be false
      end
    end

    it "parses USD-formatted inputs under $10" do
      five_ninety_five = Money.new(595, 'USD')

      expect(Monetize.parse(5.95)).to eq five_ninety_five
      expect(Monetize.parse('5.95')).to eq five_ninety_five
      expect(Monetize.parse('$5.95')).to eq five_ninety_five
      expect(Monetize.parse("\n $5.95 \n")).to eq five_ninety_five
      expect(Monetize.parse('$ 5.95')).to eq five_ninety_five
      expect(Monetize.parse('$5.95 ea.')).to eq five_ninety_five
      expect(Monetize.parse('$5.95, each')).to eq five_ninety_five
    end

    it "parses USD-formatted inputs with multiple thousands-seperators" do
      expect(Monetize.parse('1,234,567.89')).to eq Money.new(123456789, 'USD')
      expect(Monetize.parse('1,111,234,567.89')).to eq Money.new(111123456789, 'USD')
    end

    it "does not return a price if there is a price range" do
      expect { Monetize.parse('$5.95-10.95') }.to raise_error ArgumentError
      expect { Monetize.parse('$5.95 - 10.95') }.to raise_error ArgumentError
      expect { Monetize.parse('$5.95 - $10.95') }.to raise_error ArgumentError
    end

    it "does not return a price for completely invalid input" do
      expect(Monetize.parse(nil)).to eq Money.empty
      expect(Monetize.parse('hellothere')).to eq Money.empty
      expect(Monetize.parse('')).to eq Money.empty
    end

    it "handles negative inputs" do
      five_ninety_five = Money.new(-595, 'USD')

      expect(Monetize.parse("$-5.95")).to eq five_ninety_five
      expect(Monetize.parse("-$5.95")).to eq five_ninety_five
      expect(Monetize.parse("$5.95-")).to eq five_ninety_five
    end

    it "raises ArgumentError when unable to detect polarity" do
      expect { Monetize.parse('-$5.95-') }.to raise_error ArgumentError
    end

    it "parses correctly strings with exactly 3 decimal digits" do
      expect(Monetize.parse("6,534", "EUR")).to eq Money.new(653, "EUR")
    end

    context "custom currencies with 4 decimal places" do
      before :each do
        Money::Currency.register(JSON.parse(bar, :symbolize_names => true))
        Money::Currency.register(JSON.parse(eu4, :symbolize_names => true))
      end

      after :each do
        Money::Currency.unregister(JSON.parse(bar, :symbolize_names => true))
        Money::Currency.unregister(JSON.parse(eu4, :symbolize_names => true))
      end

      # String#to_money(Currency) is equivalent to Monetize.parse(String, Currency)
      it "parses strings respecting subunit to unit, decimal and thousands separator" do
        expect("$0.4".to_money("BAR")).to eq Money.new(4000, "BAR")
        expect("€0,4".to_money("EU4")).to eq Money.new(4000, "EU4")

        expect("$0.04".to_money("BAR")).to eq Money.new(400, "BAR")
        expect("€0,04".to_money("EU4")).to eq Money.new(400, "EU4")

        expect("$0.004".to_money("BAR")).to eq Money.new(40, "BAR")
        expect("€0,004".to_money("EU4")).to eq Money.new(40, "EU4")

        expect("$0.0004".to_money("BAR")).to eq Money.new(4, "BAR")
        expect("€0,0004".to_money("EU4")).to eq Money.new(4, "EU4")

        expect("$0.0024".to_money("BAR")).to eq Money.new(24, "BAR")
        expect("€0,0024".to_money("EU4")).to eq Money.new(24, "EU4")

        expect("$0.0324".to_money("BAR")).to eq Money.new(324, "BAR")
        expect("€0,0324".to_money("EU4")).to eq Money.new(324, "EU4")

        expect("$0.5324".to_money("BAR")).to eq Money.new(5324, "BAR")
        expect("€0,5324".to_money("EU4")).to eq Money.new(5324, "EU4")

        expect("$6.5324".to_money("BAR")).to eq Money.new(65324, "BAR")
        expect("€6,5324".to_money("EU4")).to eq Money.new(65324, "EU4")

        expect("$86.5324".to_money("BAR")).to eq Money.new(865324, "BAR")
        expect("€86,5324".to_money("EU4")).to eq Money.new(865324, "EU4")

        expect("$186.5324".to_money("BAR")).to eq Money.new(1865324, "BAR")
        expect("€186,5324".to_money("EU4")).to eq Money.new(1865324, "EU4")

        expect("$3,331.0034".to_money("BAR")).to eq Money.new(33310034, "BAR")
        expect("€3.331,0034".to_money("EU4")).to eq Money.new(33310034, "EU4")

        expect("$8,883,331.0034".to_money("BAR")).to eq Money.new(88833310034, "BAR")
        expect("€8.883.331,0034".to_money("EU4")).to eq Money.new(88833310034, "EU4")
      end
    end
  end

  describe ".from_string" do
    it "converts given amount to cents" do
      expect(Monetize.from_string("1")).to eq Money.new(1_00)
      expect(Monetize.from_string("1")).to eq Money.new(1_00, "USD")
      expect(Monetize.from_string("1", "EUR")).to eq Money.new(1_00, "EUR")
    end

    it "respects :subunit_to_unit currency property" do
      expect(Monetize.from_string("1", "USD")).to eq Money.new(1_00, "USD")
      expect(Monetize.from_string("1", "TND")).to eq Money.new(1_000, "TND")
      expect(Monetize.from_string("1", "CLP")).to eq Money.new(1, "CLP")
    end

    it "accepts a currency options" do
      m = Monetize.from_string("1")
      expect(m.currency).to eq Money.default_currency

      m = Monetize.from_string("1", Money::Currency.wrap("EUR"))
      expect(m.currency).to eq Money::Currency.wrap("EUR")

      m = Monetize.from_string("1", "EUR")
      expect(m.currency).to eq Money::Currency.wrap("EUR")
    end
  end

  describe ".from_fixnum" do
    it "converts given amount to cents" do
      expect(Monetize.from_fixnum(1)).to eq Money.new(1_00)
      expect(Monetize.from_fixnum(1)).to eq Money.new(1_00, "USD")
      expect(Monetize.from_fixnum(1, "EUR")).to eq Money.new(1_00, "EUR")
    end

    it "should respect :subunit_to_unit currency property" do
      expect(Monetize.from_fixnum(1, "USD")).to eq Money.new(1_00, "USD")
      expect(Monetize.from_fixnum(1, "TND")).to eq Money.new(1_000, "TND")
      expect(Monetize.from_fixnum(1, "CLP")).to eq Money.new(1, "CLP")
    end

    it "accepts a currency options" do
      m = Monetize.from_fixnum(1)
      expect(m.currency).to eq Money.default_currency

      m = Monetize.from_fixnum(1, Money::Currency.wrap("EUR"))
      expect(m.currency).to eq Money::Currency.wrap("EUR")

      m = Monetize.from_fixnum(1, "EUR")
      expect(m.currency).to eq Money::Currency.wrap("EUR")
    end
  end

  describe ".from_float" do
    it "converts given amount to cents" do
      expect(Monetize.from_float(1.2)).to eq Money.new(1_20)
      expect(Monetize.from_float(1.2)).to eq Money.new(1_20, "USD")
      expect(Monetize.from_float(1.2, "EUR")).to eq Money.new(1_20, "EUR")
    end

    it "respects :subunit_to_unit currency property" do
      expect(Monetize.from_float(1.2, "USD")).to eq Money.new(1_20, "USD")
      expect(Monetize.from_float(1.2, "TND")).to eq Money.new(1_200, "TND")
      expect(Monetize.from_float(1.2, "CLP")).to eq Money.new(1, "CLP")
    end

    it "accepts a currency options" do
      m = Monetize.from_float(1.2)
      expect(m.currency).to eq Money.default_currency

      m = Monetize.from_float(1.2, Money::Currency.wrap("EUR"))
      expect(m.currency).to eq Money::Currency.wrap("EUR")

      m = Monetize.from_float(1.2, "EUR")
      expect(m.currency).to eq Money::Currency.wrap("EUR")
    end
  end

  describe ".from_bigdecimal" do
    it "converts given amount to cents" do
      expect(Monetize.from_bigdecimal(BigDecimal.new("1"))).to eq Money.new(1_00)
      expect(Monetize.from_bigdecimal(BigDecimal.new("1"))).to eq Money.new(1_00, "USD")
      expect(Monetize.from_bigdecimal(BigDecimal.new("1"), "EUR")).to eq Money.new(1_00, "EUR")
    end

    it "respects :subunit_to_unit currency property" do
      expect(Monetize.from_bigdecimal(BigDecimal.new("1"), "USD")).to eq Money.new(1_00, "USD")
      expect(Monetize.from_bigdecimal(BigDecimal.new("1"), "TND")).to eq Money.new(1_000, "TND")
      expect(Monetize.from_bigdecimal(BigDecimal.new("1"), "CLP")).to eq Money.new(1, "CLP")
    end

    it "accepts a currency options" do
      m = Monetize.from_bigdecimal(BigDecimal.new("1"))
      expect(m.currency).to eq Money.default_currency

      m = Monetize.from_bigdecimal(BigDecimal.new("1"), Money::Currency.wrap("EUR"))
      expect(m.currency).to eq Money::Currency.wrap("EUR")

      m = Monetize.from_bigdecimal(BigDecimal.new("1"), "EUR")
      expect(m.currency).to eq Money::Currency.wrap("EUR")
    end

    context "infinite_precision = true" do
      before do
        Money.infinite_precision = true
      end

      after do
        Money.infinite_precision = false
      end

      it "keeps precision" do
        expect(Monetize.from_bigdecimal(BigDecimal.new("1.23456"))).to eq Money.new(123.456)
        expect(Monetize.from_bigdecimal(BigDecimal.new("-1.23456"))).to eq Money.new(-123.456)
        expect(Monetize.from_bigdecimal(BigDecimal.new("1.23456"))).to eq Money.new(123.456, "USD")
        expect(Monetize.from_bigdecimal(BigDecimal.new("1.23456"), "EUR")).to eq Money.new(123.456, "EUR")
      end
    end
  end

  describe ".from_numeric" do
    it "converts given amount to cents" do
      expect(Monetize.from_numeric(1)).to eq Money.new(1_00)
      expect(Monetize.from_numeric(1.0)).to eq Money.new(1_00)
      expect(Monetize.from_numeric(BigDecimal.new("1"))).to eq Money.new(1_00)
    end

    it "raises ArgumentError with unsupported argument" do
      expect { Monetize.from_numeric("100") }.to raise_error(ArgumentError)
    end

    it "optimizes workload" do
      expect(Monetize).to receive(:from_fixnum).with(1, "USD").and_return(Money.new(1_00, "USD"))
      expect(Monetize.from_numeric(1, "USD")).to eq Money.new(1_00, "USD")
      expect(Monetize).to receive(:from_bigdecimal).with(BigDecimal.new("1.0"), "USD").and_return(Money.new(1_00, "USD"))
      expect(Monetize.from_numeric(1.0, "USD")).to eq Money.new(1_00, "USD")
    end

    it "respects :subunit_to_unit currency property" do
      expect(Monetize.from_numeric(1, "USD")).to eq Money.new(1_00, "USD")
      expect(Monetize.from_numeric(1, "TND")).to eq Money.new(1_000, "TND")
      expect(Monetize.from_numeric(1, "CLP")).to eq Money.new(1, "CLP")
    end

    it "accepts a bank option" do
      expect(Monetize.from_numeric(1)).to eq Money.new(1_00)
      expect(Monetize.from_numeric(1)).to eq Money.new(1_00, "USD")
      expect(Monetize.from_numeric(1, "EUR")).to eq Money.new(1_00, "EUR")
    end

    it "accepts a currency options" do
      m = Monetize.from_numeric(1)
      expect(m.currency).to eq Money.default_currency

      m = Monetize.from_numeric(1, Money::Currency.wrap("EUR"))
      expect(m.currency).to eq Money::Currency.wrap("EUR")

      m = Monetize.from_numeric(1, "EUR")
      expect(m.currency).to eq Money::Currency.wrap("EUR")
    end
  end

  describe ".extract_cents" do
    it "correctly treats pipe marks '|' in input (regression test)" do
      expect(Monetize.extract_cents('100|0')).to eq Monetize.extract_cents('100!0')
    end
  end

  context "given the same inputs to .parse and .from_*" do
    it "gives the same results" do
      expect(4.635.to_money).to eq "4.635".to_money
    end
  end
end