#=============================================================================
#
#  Copyright (c) Kitware, Inc.
#  All rights reserved.
#  See LICENSE.txt for details.
#
#  This software is distributed WITHOUT ANY WARRANTY; without even
#  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
#  PURPOSE.  See the above copyright notice for more information.
#
#=============================================================================
import smtk
import smtk.testing
from smtk.simple import *
import sys

def floatColorToHex(fc):
  return '#' + ''.join(['{:02x}'.format(int(x*255.0)) for x in fc])

class TestExodusSession(smtk.testing.TestCase):

  def setUp(self):
    import os
    self.filename = os.path.join(smtk.testing.DATA_DIR, 'exodus', 'disk_out_ref.ex2')

    self.mgr = smtk.model.Manager.create()
    sess = self.mgr.createSession('exodus')
    SetActiveSession(sess)

  def testRead(self):
    ents = Read(self.filename)
    self.model = smtk.model.Model(ents[0])

    #Verify that the model is marked as discrete
    self.assertEqual(
        self.model.geometryStyle(), smtk.model.DISCRETE,
        'Expected discrete model, got {gs}'.format(gs=self.model.geometryStyle()))

    #Verify that the file contains the proper number of groups.
    subgroups = self.model.groups()
    numGroups = len(subgroups)
    self.assertEqual(numGroups, 3, 'Expected 3 groups, found %d' % numGroups)

    numSubGroupsExpected = [1, 7, 3]
    allgroups = []
    for i in range(len(numSubGroupsExpected)):
        numSubGroups = len(subgroups[i].members())
        self.assertEqual(numSubGroupsExpected[i], numSubGroups,
            'Expected {e} groups, found {a}'.format(e=numSubGroupsExpected[i], a=numSubGroups))
        allgroups += subgroups[i].members()

    #Verify that the group names match those from the Exodus file.
    nameset = {
        'Unnamed block ID: 1 Type: HEX8': '#5a5255',
        'Unnamed set ID: 1':              '#ae5a41',
        'Unnamed set ID: 2':              '#559e83',
        'Unnamed set ID: 3':              '#c3cb71',
        'Unnamed set ID: 4':              '#1b85b8',
        'Unnamed set ID: 5':              '#cb2c31',
        'Unnamed set ID: 6':              '#8b1ec4',
        'Unnamed set ID: 7':              '#ff6700'
    }
    self.assertTrue(all([x.name() in nameset for x in allgroups]),
        'Not all group names recognized.')

    # Verify that no groups which are not in the list above are present.
    groupnames = [x.name() for x in allgroups]
    self.assertTrue(all([x in groupnames for x in nameset]),
        'Some expected group names not present.')

    # Count the number of each *type* of group (node, face, volume)
    #print '\n'.join([str((x.name(), x.flagSummary())) for x in allgroups])
    grouptypes = [x.flagSummary() for x in allgroups]
    gtc = {x:grouptypes.count(x) for x in grouptypes}
    expectedgrouptypecounts = {
      'boundary group (0-d entities)': 3,
      'boundary group (0,1,2-d entities)': 7,
      'domain group (3-d entities)': 1
      }
    for entry in gtc.items():
      print '%40s: %d' % entry
    self.assertEqual(gtc, expectedgrouptypecounts,
        'At least one group was of the wrong type.')

    if self.haveVTK() and self.haveVTKExtension():

        # Render groups with colors:
        for grp in allgroups:
            color = self.hex2rgb(nameset[grp.name()])
            SetEntityProperty(grp, 'color', as_float=color)
            # The element block should not be shown as it is coincident with some
            # of the side sets and throws off baseline images. Remove its tessellation.
            if grp.name() ==  'Unnamed block ID: 1 Type: HEX8':
                grp.setTessellation(smtk.model.Tessellation())

        self.startRenderTest()
        mbs, filt, mapper, actor = self.addModelToScene(self.model)

        self.renderer.SetBackground(1,1,1)
        cam = self.renderer.GetActiveCamera()
        cam.SetFocalPoint(0., 0., 0.)
        cam.SetPosition(19,17,-43)
        cam.SetViewUp(-0.891963, -0.122107, -0.435306)
        self.renderer.ResetCamera()
        self.renderWindow.Render()
        import vtk
        #wri = vtk.vtkCompositeDataWriter()
        #wri.SetInputData(mbs.GetOutputDataObject(0))
        #wri.SetFileName('/tmp/foofar.vtk')
        #wri.Write()
        ## wri = vtk.vtkXMLDataSetWriter()
        wri = vtk.vtkXMLMultiBlockDataWriter()
        wri.SetDataModeToAscii()
        wri.SetInputData(mbs.GetOutputDataObject(0))
        wri.SetFileName('/tmp/foofar.vtm')
        wri.Write()
        try:
          self.assertImageMatch(['baselines', 'exodus', 'disk_out_ref.png'])
        finally:
          self.interact()

    else:
        self.assertFalse(
            self.haveVTKExtension(),
            'Could not import vtk. Python path is {pp}'.format(pp=sys.path))

if __name__ == '__main__':
  smtk.testing.process_arguments()
  smtk.testing.main()
