# TestRun.py
#
# Copyright (C) 2011 Carlos Garcia Campos <carlosgc@gnome.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

from backends import get_backend, get_all_backends
from Config import Config
from Utils import get_document_paths_from_dir, get_skipped_tests
from Printer import get_printer
import sys
import os
import errno

from Queue import Queue
from threading import Thread, RLock

class TestRun:

    def __init__(self, docsdir, refsdir, outdir):
        self._docsdir = docsdir
        self._refsdir = refsdir
        self._outdir = outdir
        self._skip = get_skipped_tests(docsdir)
        self.config = Config()
        self.printer = get_printer()

        # Results
        self._n_tests = 0
        self._n_passed = 0
        self._failed = []
        self._crashed = []
        self._failed_status_error = []
        self._stderr = []
        self._skipped = []

        self._queue = Queue()
        self._lock = RLock()

        try:
            os.makedirs(self._outdir);
        except OSError as e:
            if e.errno != errno.EEXIST:
                raise
        except:
            raise

    def test(self, refs_path, doc_path, test_path, backend, n_doc, total_docs):
        # First check whether there are test results for the backend
        ref_has_md5 = backend.has_md5(refs_path)
        ref_is_crashed = backend.is_crashed(refs_path)
        ref_is_failed = backend.is_failed(refs_path)
        if not ref_has_md5 and not ref_is_crashed and not ref_is_failed:
            with self._lock:
                self._skipped.append("%s (%s)" % (doc_path, backend.get_name()))
            self.printer.print_default("Reference files not found, skipping '%s' for %s backend" % (doc_path, backend.get_name()))
            return

        with self._lock:
            self._n_tests += 1

        self.printer.print_test_start("Testing '%s' using %s backend (%d/%d): " % (doc_path, backend.get_name(), n_doc, total_docs))
        test_has_md5 = backend.create_refs(doc_path, test_path)

        if backend.has_stderr(test_path):
            with self._lock:
                self._stderr.append("%s (%s)" % (doc_path, backend.get_name()))

        if ref_has_md5 and test_has_md5:
            if backend.compare_checksums(refs_path, test_path, not self.config.keep_results, self.config.create_diffs, self.config.update_refs):
                # FIXME: remove dir if it's empty?
                self.printer.print_test_result("PASS")
                with self._lock:
                    self._n_passed += 1
            else:
                self.printer.print_test_result_ln("FAIL")
                with self._lock:
                    self._failed.append("%s (%s)" % (doc_path, backend.get_name()))
            return
        elif test_has_md5:
            if ref_is_crashed:
                self.printer.print_test_result_ln("DOES NOT CRASH")
            elif ref_is_failed:
                self.printer.print_test_result_ln("DOES NOT FAIL")
            return

        test_is_crashed = backend.is_crashed(test_path)
        if ref_is_crashed and test_is_crashed:
            self.printer.print_test_result("PASS (Expected crash)")
            with self._lock:
                self._n_passed += 1
            return

        test_is_failed = backend.is_failed(test_path)
        if ref_is_failed and test_is_failed:
            # FIXME: compare status errors
            self.printer.print_test_result("PASS (Expected fail with status error %d)" % (test_is_failed))
            with self._lock:
                self._n_passed += 1
            return

        if test_is_crashed:
            self.printer.print_test_result_ln("CRASH")
            with self._lock:
                self._crashed.append("%s (%s)" % (doc_path, backend.get_name()))
            return

        if test_is_failed:
            self.printer.print_test_result_ln("FAIL (status error %d)" % (test_is_failed))
            with self._lock:
                self._failed_status_error("%s (%s)" % (doc_path, backend.get_name()))
            return

    def run_test(self, filename, n_doc = 1, total_docs = 1):
        if filename in self._skip:
            doc_path = os.path.join(self._docsdir, filename)
            with self._lock:
                self._skipped.append("%s" % (doc_path))
            self.printer.print_default("Skipping test '%s' (%d/%d)" % (doc_path, n_doc, total_docs))
            return

        out_path = os.path.join(self._outdir, filename)
        try:
            os.makedirs(out_path)
        except OSError as e:
            if e.errno != errno.EEXIST:
                raise
        except:
            raise
        doc_path = os.path.join(self._docsdir, filename)
        refs_path = os.path.join(self._refsdir, filename)

        if not os.path.isdir(refs_path):
            with self._lock:
                self._skipped.append("%s" % (doc_path))
            self.printer.print_default("Reference dir not found for %s, skipping (%d/%d)" % (doc_path, n_doc, total_docs))
            return

        if self.config.backends:
            backends = [get_backend(name) for name in self.config.backends]
        else:
            backends = get_all_backends()

        for backend in backends:
            self.test(refs_path, doc_path, out_path, backend, n_doc, total_docs)

    def _worker_thread(self):
        while True:
            doc, n_doc, total_docs = self._queue.get()
            self.run_test(doc, n_doc, total_docs)
            self._queue.task_done()

    def run_tests(self):
        docs, total_docs = get_document_paths_from_dir(self._docsdir)

        self.printer.printout_ln('Process %d is spawning %d worker threads...' % (os.getpid(), self.config.threads))

        for n_thread in range(self.config.threads):
            thread = Thread(target=self._worker_thread)
            thread.daemon = True
            thread.start()

        n_doc = 0
        for doc in docs:
            n_doc += 1
            self._queue.put( (doc, n_doc, total_docs) )

        self._queue.join()

    def summary(self):
        if not self._n_tests:
            self.printer.printout_ln("No tests run")
            return

        self.printer.printout_ln("Total %d tests" % (self._n_tests))
        self.printer.printout_ln("%d tests passed (%.2f%%)" % (self._n_passed, (self._n_passed * 100.) / self._n_tests))
        def report_tests(test_list, test_type):
            n_tests = len(test_list)
            if not n_tests:
                return
            self.printer.printout_ln("%d tests %s (%.2f%%): %s" % (n_tests, test_type, (n_tests * 100.) / self._n_tests, ", ".join(test_list)))

        report_tests(self._failed, "failed")
        report_tests(self._crashed, "crashed")
        report_tests(self._failed_status_error, "failed to run")
        report_tests(self._stderr, "have stderr output")
        report_tests(self._skipped, "skipped")