import collect

class reporter(object):
    """ base class for reporters

        reporting in a test-driven manner, walking through the module
        trees, sorted on containment and name
    """
    # the event handlers, override these in subclasses
    def module(self, typedesc):
        msg = 'module %s' % (typedesc.name,)
        print '=' * len(msg)
        print msg
        print '=' * len(msg)
        print
        if typedesc.doc:
            print typedesc.doc
            print

    def cls(self, typedesc):
        msg = 'class %s' % (typedesc.basename,)
        print msg
        print '=' * len(msg)
        print
        if typedesc.doc:
            print typedesc.doc
            print

    def method(self, typedesc, info):
        self._callable(typedesc, info)

    def function(self, typedesc, info):
        self._callable(typedesc, info)

    def attribute(self, typedesc):
        msg = 'attribute %s=%r' % (typedesc.basename, typedesc.value)
        if len(msg) > 79:
            msg = '%s...' % (msg[:76],)
        print msg
        print

    # reporter-specific methods
    def _callable(self, typedesc, info):
        msg = '%03d    def %s(%s)' % (
            typedesc.lineno, typedesc.basename, ', '.join(typedesc.args))
        print msg
        print '-' * len(msg)
        print
        if typedesc.doc:
            print typedesc.doc
        #else:
        #    print '<no docstring>'
        print
        if info:
            for cd in info.calldata:
                flines = open(cd.filename).readlines()
                print 'called from %s' % (typedesc.filename.split('/')[-1],)
                print 'with args:', ', '.join([
                    '%s=%r' % (k, v) for (k, v) in cd.args])
                print '::'
                print
                print ' %03d %s' % (cd.lineno, flines[cd.lineno - 1][:-1])
                print

def report(coll, tracer, reporter):
    raw = coll.collect()
    tree = coll.get_tree(raw)
    for item in tree:
        if isinstance(item, collect.Module):
            reporter.module(item)
        elif isinstance(item, collect.Class):
            reporter.cls(item)
        elif isinstance(item, collect.Method):
            reporter.method(item, tracer.get((item.filename, item.lineno)))
        elif isinstance(item, collect.Function):
            reporter.function(item, tracer.get((item.filename, item.lineno)))
        elif isinstance(item, collect.Attribute):
            reporter.attribute(item)