from __future__ import print_function
import P4
import sys

class IntegratedChanges:
    def __init__(self, p4, submitted_change):
        self.p4 = p4
        self.change = submitted_change
        self.integrated_changes = set()
        self.integrated_files = set()

        self.integrated_description = p4.run_describe('-s', submitted_change)[0]['desc']

        filelog = self.p4.run_filelog("@{0},{0}".format(submitted_change))

        for depotFile in filelog:

            for revision in depotFile.revisions:

                for integration in revision.integrations:

                    if integration.how == "copy from":
                        startrev = int(integration.srev) + 1
                        endrev = int(integration.erev) + 1
                        for i in range(startrev, endrev):
                            self.integrated_files.add("{}#{}".format(integration.file, i))
                            integrated_change = self.p4.run_changes("{0}#{1},{1}".format(integration.file, i))[0]
                            self.integrated_changes.add(integrated_change['change'])

        for change in self.integrated_changes:
            desc = p4.run_describe('-s', change)[0]
            use_change = True

            for file, rev in zip(desc['depotFile'], desc['rev']):
                file_rev = "{}#{}".format(file, rev)
                if file_rev not in self.integrated_files:
                    use_change = False

            if use_change:
                self.integrated_description += "\n-------------\nIntegrated change {}: {}".format(change, desc['desc'])

if __name__ == '__main__':
    if len(sys.argv) < 2:
        print("Usage : {} #change".format(sys.argv[0]))
        sys.exit(1)

    change = sys.argv[1]
    p4 = P4.P4()
    with p4.connect():
        integrated_changes = IntegratedChanges(p4, change)
        print(integrated_changes.integrated_description)