// test format
var assert = require('assert'),
    error = require('../../../lib/error/index'),
    math = require('../../../index')(),
    ifElse = math.ifElse;

describe('ifElse', function() {

  it('should evaluate boolean conditions', function() {
    assert.equal(ifElse(true, 1, 0), 1);
    assert.equal(ifElse(false, 1, 0), 0);
  });

  it('should evaluate number conditions', function() {
    assert.equal(ifElse(1, 1, 0), 1);
    assert.equal(ifElse(4, 1, 0), 1);
    assert.equal(ifElse(-1, 1, 0), 1);
    assert.equal(ifElse(0, 1, 0), 0);
  });

  it('should evaluate bignumber conditions', function() {
    assert.equal(ifElse(math.bignumber(1), 1, 0), 1);
    assert.equal(ifElse(math.bignumber(4), 1, 0), 1);
    assert.equal(ifElse(math.bignumber(-1), 1, 0), 1);
    assert.equal(ifElse(math.bignumber(0), 1, 0), 0);
  });

  it('should evaluate complex number conditions', function() {
    assert.equal(ifElse(math.complex(2, 3), 1, 0), 1);
    assert.equal(ifElse(math.complex(2, 0), 1, 0), 1);
    assert.equal(ifElse(math.complex(0, 3), 1, 0), 1);
    assert.equal(ifElse(math.complex(0, 0), 1, 0), 0);
  });

  it('should evaluate string conditions', function() {
    assert.equal(ifElse('hello', 1, 0), 1);
    assert.equal(ifElse('', 1, 0), 0);
  });

  it('should evaluate unit conditions', function() {
    assert.equal(ifElse(math.unit('5cm'), 1, 0), 1);
    assert.equal(ifElse(math.unit('0 inch'), 1, 0), 0);
  });

  it('should evaluate null conditions', function() {
    assert.equal(ifElse(null, 1, 0), 0);
  });

  it('should evaluate undefined conditions', function() {
    assert.equal(ifElse(undefined, 1, 0), 0);
  });

  it('should evaluate array conditions', function() {
    assert.deepEqual(ifElse([1, 0, 1], 1, 0), [1, 0, 1]);
    assert.deepEqual(ifElse([[1, 0], [0, 0]], 1, 0), [[1, 0], [0, 0]]);

    assert.deepEqual(ifElse([[1, 1], [1, 1]], [[1,2],[3,4]], [[5,6],[7,8]]), [[1,2],[3,4]]);
    assert.deepEqual(ifElse([[1, 0], [0, 1]], 123, [[5,6],[7,8]]), [[123,6],[7,123]]);
    assert.deepEqual(ifElse([[1, 0], [0, 1]], [[1,2],[3,4]], 123), [[1,123],[123,4]]);
    assert.deepEqual(ifElse([[0, 0], [0, 0]], [[1,2],[3,4]], [[5,6],[7,8]]), [[5,6],[7,8]]);
  });

  it('should evaluate matrix conditions', function() {
    assert.deepEqual(ifElse(math.matrix([1, 0, 1]), 1, 0), math.matrix([1, 0, 1]));
    assert.deepEqual(ifElse(math.matrix([[1, 0], [0, 0]]), 1, 0),
        math.matrix([[1, 0], [0, 0]]));

    assert.deepEqual(ifElse(math.matrix([[1, 1], [1, 1]]), math.matrix([[1,2],[3,4]]), math.matrix([[5,6],[7,8]])),
        math.matrix([[1,2],[3,4]]));
    assert.deepEqual(ifElse(math.matrix([[1, 0], [0, 1]]), 123, [[5,6],[7,8]]),
        math.matrix([[123,6],[7,123]]));
    assert.deepEqual(ifElse(math.matrix([[1, 0], [0, 1]]), math.matrix([[1,2],[3,4]]), 123),
        math.matrix([[1,123],[123,4]]));
    assert.deepEqual(ifElse(math.matrix([[0, 0], [0, 0]]), math.matrix([[1,2],[3,4]]), math.matrix([[5,6],[7,8]])),
        math.matrix([[5,6],[7,8]]));
  });

  it('should throw an error when matrix dimensions mismatch', function() {
    assert.throws(function () {
      ifElse(math.matrix([[1, 1], [1, 1]]), math.matrix([[1,2,3],[4,5,6]]), 1);
    });
    assert.throws(function () {
      ifElse(math.matrix([[1, 1], [1, 1]]), 1, math.matrix([[1,2,3],[4,5,6]]));
    });
    assert.throws(function () {
      ifElse(math.matrix([[1, 1], [1, 1]]), 1, math.matrix([1,2]));
    });
  });

  it('should throw an error if called with invalid number of arguments', function() {
    assert.throws(function() { ifElse(true); });
    assert.throws(function() { ifElse(true, true); });
    assert.throws(function() { ifElse(true, true, true, true); });
  });

  it('should throw an error if called with invalid type of arguments', function() {
    assert.throws(function() { ifElse(new Date(), 1, 0); }, math.type.UnsupportedTypeError);
    assert.throws(function() { ifElse(/regexp/, 1, 0); }, math.type.UnsupportedTypeError);
  });

});