#!/usr/bin/env python
# -*- coding: utf-8 -*-


import os
import sys
import optparse
import logging
import locale
import datetime
import getpass
import socket
import json
import pipes

here = sys.path[0]
if here != '/usr/bin':
    # Git checkout
    sys.path[0] = os.path.dirname(here)

from pungi import get_full_version


# force C locales
locale.setlocale(locale.LC_ALL, "C")


COMPOSE = None


def main():
    global COMPOSE

    parser = optparse.OptionParser()
    parser.add_option(
        "--target-dir",
        metavar="PATH",
        help="a compose is created under this directory",
    )
    parser.add_option(
        "--label",
        help="specify compose label (example: Snapshot-1.0); required for production composes"
    )
    parser.add_option(
        "--no-label",
        action="store_true",
        default=False,
        help="make a production compose without label"
    )
    parser.add_option(
        "--supported",
        action="store_true",
        default=False,
        help="set supported flag on media (automatically on for 'RC-x.y' labels)"
    )
    parser.add_option(
        "--old-composes",
        metavar="PATH",
        dest="old_composes",
        default=[],
        action="append",
        help="Path to directory with old composes. Reuse an existing repodata from the most recent compose.",
    )
    parser.add_option(
        "--compose-dir",
        metavar="PATH",
        help="reuse an existing compose directory (DANGEROUS!)",
    )
    parser.add_option(
        "--debug-mode",
        action="store_true",
        default=False,
        help="run pungi in DEBUG mode (DANGEROUS!)",
    )
    parser.add_option(
        "--config",
        help="Config file"
    )
    parser.add_option(
        "--skip-phase",
        metavar="PHASE",
        action="append",
        default=[],
        help="skip a compose phase",
    )
    parser.add_option(
        "--just-phase",
        metavar="PHASE",
        action="append",
        default=[],
        help="run only a specified compose phase",
    )
    parser.add_option(
        "--nightly",
        action="store_const",
        const="nightly",
        dest="compose_type",
        help="make a nightly compose",
    )
    parser.add_option(
        "--test",
        action="store_const",
        const="test",
        dest="compose_type",
        help="make a test compose",
    )
    parser.add_option(
        "--koji-event",
        metavar="ID",
        type="int",
        help="specify a koji event for populating package set",
    )
    parser.add_option(
        "--version",
        action="store_true",
        help="output version information and exit",
    )
    parser.add_option(
        "--notification-script",
        help="script for sending progress notification messages"
    )

    opts, args = parser.parse_args()

    if opts.version:
        print("pungi %s" % get_full_version())
        sys.exit(0)

    if opts.target_dir and opts.compose_dir:
        parser.error("cannot specify --target-dir and --compose-dir at once")

    if not opts.target_dir and not opts.compose_dir:
        parser.error("please specify a target directory")

    if opts.target_dir and not opts.compose_dir:
        opts.target_dir = os.path.abspath(opts.target_dir)
        if not os.path.isdir(opts.target_dir):
            parser.error("The target directory does not exist or is not a directory: %s" % opts.target_dir)
    else:
        opts.compose_dir = os.path.abspath(opts.compose_dir)
        if not os.path.isdir(opts.compose_dir):
            parser.error("The compose directory does not exist or is not a directory: %s" % opts.compose_dir)

    compose_type = opts.compose_type or "production"
    if compose_type == "production" and not opts.label and not opts.no_label:
        parser.error("must specify label for a production compose")

    if not opts.config:
        parser.error("please specify a config")
    opts.config = os.path.abspath(opts.config)

    import kobo.conf
    import kobo.log
    import productmd.composeinfo

    if opts.label:
        try:
            productmd.composeinfo.verify_label(opts.label)
        except ValueError as ex:
            parser.error(str(ex))

    from pungi.compose import Compose
    import pungi.notifier

    logger = logging.Logger("Pungi")
    kobo.log.add_stderr_logger(logger)

    conf = kobo.conf.PyConfigParser()
    conf.load_from_file(opts.config)

    # check if all requirements are met
    import pungi.checks
    if not pungi.checks.check(conf):
        sys.exit(1)
    pungi.checks.check_umask(logger)
    errors = pungi.checks.validate(conf)
    if errors:
        for error in errors:
            print >>sys.stderr, error
        sys.exit(1)

    if opts.target_dir:
        compose_dir = Compose.get_compose_dir(opts.target_dir, conf, compose_type=compose_type, compose_label=opts.label)
    else:
        compose_dir = opts.compose_dir

    notifier = pungi.notifier.PungiNotifier(opts.notification_script)

    compose = Compose(conf,
                      topdir=compose_dir,
                      debug=opts.debug_mode,
                      skip_phases=opts.skip_phase,
                      just_phases=opts.just_phase,
                      old_composes=opts.old_composes,
                      koji_event=opts.koji_event,
                      supported=opts.supported,
                      logger=logger,
                      notifier=notifier)
    notifier.compose = compose
    COMPOSE = compose
    try:
        run_compose(compose)
    except Exception, ex:
        compose.log_error("Compose run failed: %s" % ex)
        raise


def run_compose(compose):
    import pungi.phases
    import pungi.metadata

    errors = []

    compose.write_status("STARTED")
    compose.log_info("Host: %s" % socket.gethostname())
    compose.log_info("Pungi version: %s" % get_full_version())
    compose.log_info("User name: %s" % getpass.getuser())
    compose.log_info("Working directory: %s" % os.getcwd())
    compose.log_info("Command line: %s" % " ".join([pipes.quote(arg) for arg in sys.argv]))
    compose.log_info("Compose top directory: %s" % compose.topdir)
    compose.read_variants()

    # dump the config file
    date_str = datetime.datetime.strftime(datetime.datetime.now(), "%F_%X").replace(":", "-")
    config_dump = compose.paths.log.log_file("global", "config-dump_%s" % date_str)
    open(config_dump, "w").write(json.dumps(compose.conf, sort_keys=True, indent=4))

    # initialize all phases
    init_phase = pungi.phases.InitPhase(compose)
    pkgset_phase = pungi.phases.PkgsetPhase(compose)
    buildinstall_phase = pungi.phases.BuildinstallPhase(compose)
    gather_phase = pungi.phases.GatherPhase(compose, pkgset_phase)
    extrafiles_phase = pungi.phases.ExtraFilesPhase(compose, pkgset_phase)
    createrepo_phase = pungi.phases.CreaterepoPhase(compose)
    ostree_installer_phase = pungi.phases.OstreeInstallerPhase(compose)
    ostree_phase = pungi.phases.OSTreePhase(compose)
    productimg_phase = pungi.phases.ProductimgPhase(compose, pkgset_phase)
    createiso_phase = pungi.phases.CreateisoPhase(compose)
    liveimages_phase = pungi.phases.LiveImagesPhase(compose)
    livemedia_phase = pungi.phases.LiveMediaPhase(compose)
    image_build_phase = pungi.phases.ImageBuildPhase(compose)
    osbs_phase = pungi.phases.OSBSPhase(compose)
    image_checksum_phase = pungi.phases.ImageChecksumPhase(compose)
    test_phase = pungi.phases.TestPhase(compose)

    # check if all config options are set
    for phase in (init_phase, pkgset_phase, createrepo_phase,
                  buildinstall_phase, productimg_phase, gather_phase,
                  extrafiles_phase, createiso_phase, liveimages_phase,
                  livemedia_phase, image_build_phase, image_checksum_phase,
                  test_phase, ostree_phase, ostree_installer_phase,
                  osbs_phase):
        if phase.skip():
            continue
        try:
            phase.validate()
        except ValueError as ex:
            for i in str(ex).splitlines():
                errors.append("%s: %s" % (phase.name.upper(), i))
    if errors:
        for i in errors:
            compose.log_error(i)
            print(i)
        sys.exit(1)

    # PREP

    # Note: This may be put into a new method of phase classes (e.g. .prep())
    # in same way as .validate() or .run()

    # Prep for liveimages - Obtain a password for signing rpm wrapped images
    if ("signing_key_password_file" in compose.conf
            and "signing_command" in compose.conf
            and "%(signing_key_password)s" in compose.conf["signing_command"]
            and not liveimages_phase.skip()):
        # TODO: Don't require key if signing is turned off
        # Obtain signing key password
        signing_key_password = None

        # Use appropriate method
        if compose.conf["signing_key_password_file"] == "-":
            # Use stdin (by getpass module)
            try:
                signing_key_password = getpass.getpass("Signing key password: ")
            except EOFError:
                compose.log_debug("Ignoring signing key password")
                pass
        else:
            # Use text file with password
            try:
                signing_key_password = open(compose.conf["signing_key_password_file"], "r").readline().rstrip('\n')
            except IOError:
                # Filename is not print intentionally in case someone puts password directly into the option
                err_msg = "Cannot load password from file specified by 'signing_key_password_file' option"
                compose.log_error(err_msg)
                print(err_msg)
                sys.exit(1)

        if signing_key_password:
            # Store the password
            compose.conf["signing_key_password"] = signing_key_password

    # INIT phase
    init_phase.start()
    init_phase.stop()

    # PKGSET phase
    pkgset_phase.start()
    pkgset_phase.stop()

    # BUILDINSTALL phase - start
    buildinstall_phase.start()

    # GATHER phase
    gather_phase.start()
    gather_phase.stop()

    # EXTRA_FILES phase
    extrafiles_phase.start()
    extrafiles_phase.stop()

    # CREATEREPO phase
    createrepo_phase.start()
    createrepo_phase.stop()

    # BUILDINSTALL phase
    # must finish before PRODUCTIMG
    # must finish before CREATEISO
    buildinstall_phase.stop()
    if not buildinstall_phase.skip():
        buildinstall_phase.copy_files()

    ostree_phase.start()
    ostree_phase.stop()

    # PRODUCTIMG phase
    productimg_phase.start()
    productimg_phase.stop()

    # write treeinfo before ISOs are created
    for variant in compose.get_variants():
        for arch in variant.arches + ["src"]:
            pungi.metadata.write_tree_info(compose, arch, variant)

    # write .discinfo and media.repo before ISOs are created
    for variant in compose.get_variants(recursive=True):
        if variant.type == "addon" or variant.is_empty:
            continue
        for arch in variant.arches + ["src"]:
            timestamp = pungi.metadata.write_discinfo(compose, arch, variant)
            pungi.metadata.write_media_repo(compose, arch, variant, timestamp)

    # CREATEISO and LIVEIMAGES phases
    createiso_phase.start()
    liveimages_phase.start()
    image_build_phase.start()
    livemedia_phase.start()
    ostree_installer_phase.start()
    osbs_phase.start()

    createiso_phase.stop()
    liveimages_phase.stop()
    image_build_phase.stop()
    livemedia_phase.stop()
    ostree_installer_phase.stop()
    osbs_phase.stop()

    image_checksum_phase.start()
    image_checksum_phase.stop()

    pungi.metadata.write_compose_info(compose)
    osbs_phase.dump_metadata()

    # TEST phase
    test_phase.start()
    test_phase.stop()

    compose.im.dump(compose.paths.compose.metadata("images.json"))

    # create a latest symlink
    compose_dir = os.path.basename(compose.topdir)
    if len(compose.conf["release_version"].split(".")) == 1:
        symlink_name = "latest-%s-%s" % (compose.conf["release_short"], compose.conf["release_version"])
    else:
        symlink_name = "latest-%s-%s" % (compose.conf["release_short"], ".".join(compose.conf["release_version"].split(".")[:-1]))
    if compose.conf["release_is_layered"]:
        symlink_name += "-%s-%s" % (compose.conf["base_product_short"], compose.conf["base_product_version"])
    symlink = os.path.join(compose.topdir, "..", symlink_name)

    try:
        os.unlink(symlink)
    except OSError as ex:
        if ex.errno != 2:
            raise
    try:
        os.symlink(compose_dir, symlink)
    except Exception as ex:
        compose.log_error("Couldn't create latest symlink: %s" % ex)

    compose.log_info("Compose finished: %s" % compose.topdir)
    compose.write_status("FINISHED")


if __name__ == "__main__":
    try:
        main()
    except (Exception, KeyboardInterrupt) as ex:
        if COMPOSE:
            tb_path = COMPOSE.paths.log.log_file("global", "traceback")
            COMPOSE.log_error("Exception: %s" % ex)
            COMPOSE.log_error("Extended traceback in: %s" % tb_path)
            COMPOSE.log_critical("Compose failed: %s" % COMPOSE.topdir)
            COMPOSE.write_status("DOOMED")
            import kobo.tback
            open(tb_path, "w").write(kobo.tback.Traceback().get_traceback())
        else:
            print("Exception: %s" % ex)
            raise
        sys.stdout.flush()
        sys.stderr.flush()
        sys.exit(1)