#!/usr/bin/env python
# Copyright 2001 by Brad Chapman.  All rights reserved.
# This code is part of the Biopython distribution and governed by its
# license.  Please see the LICENSE file that should have been included
# as part of this package.
"""Test the creation of graphics of distribution information.

Provides tests for the Graphics.Distribution classes which provide the
ability to create graphics to show the distribution of information about
BACs/chromosomes/etc.
"""
# standard library
import os
import random
import unittest

from Bio import MissingExternalDependencyError
try:
    import reportlab as r
    del r
except:
    raise MissingExternalDependencyError(\
        "Install reportlab if you want to use Bio.Graphics.")

# local stuff
from Bio.Graphics.Distribution import BarChartDistribution
from Bio.Graphics.Distribution import LineDistribution
from Bio.Graphics.Distribution import DistributionPage


def random_distribution(min = -5.0, max = 5.0, total_items = 50):
    """Create a series of random distribution information.
    """
    num_items = random.randrange(5, total_items)
    all_info = []
    for item in range(num_items):
        new_item = random.uniform(min, max)
        all_info.append(new_item)

    return all_info

class BarChartTest(unittest.TestCase):
    """Test display of BarChart distributions on a page.
    """
    def setUp(self):
        self.simple_page = os.path.join(os.getcwd(), "Graphics", "simple_bar.pdf")
        self.multi_page = os.path.join(os.getcwd(), "Graphics", "multi_bar.pdf")

        self.num_multi = 5
    
    def test_simple_page(self):
        """Test displaying a page with single distribution.
        """
        dist_info = []
        new_info = random_distribution()
        dist_info.append(new_info)
        distribution = BarChartDistribution(dist_info)

        dist_page = DistributionPage()
        dist_page.distributions.append(distribution)

        dist_page.draw(self.simple_page, "Test Bar Chart")

    def test_multi_page(self):
        """Create a page with multiple distributions on it.
        """
        dist_page = DistributionPage()

        dist_page.number_of_columns = 3
        
        for multi in range(self.num_multi):
            dist_info = []
            new_info = random_distribution()
            dist_info.append(new_info)

            distribution = BarChartDistribution(dist_info)
            distribution.chart_title = "Distribution %s" % (multi + 1)
            dist_page.distributions.append(distribution)

        dist_page.draw(self.multi_page, "Test Multi Bar Chart")

if __name__ == "__main__":
    runner = unittest.TextTestRunner(verbosity = 2)
    unittest.main(testRunner=runner)