#!/usr/bin/env python3

"""
Copyright 2019 Oliver Smith

This file is part of pmbootstrap.

pmbootstrap 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 3 of the License, or
(at your option) any later version.

pmbootstrap 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 pmbootstrap.  If not, see <http://www.gnu.org/licenses/>.
"""

import glob
import json
import logging
import os
import sys

import pmb.aportgen
import pmb.build
import pmb.build.autodetect
import pmb.config
import pmb.chroot
import pmb.chroot.initfs
import pmb.chroot.other
import pmb.export
import pmb.flasher
import pmb.helpers.logging
import pmb.helpers.pkgrel_bump
import pmb.helpers.pmaports
import pmb.helpers.repo
import pmb.helpers.repo_missing
import pmb.helpers.run
import pmb.install
import pmb.parse
import pmb.qemu


def _parse_flavor(args):
    """
    Verify the flavor argument if specified, or return a default value.
    """
    # Install at least one kernel and get installed flavors
    suffix = "rootfs_" + args.device
    flavors = pmb.chroot.other.kernel_flavors_installed(args, suffix)

    # Parse and verify the flavor argument
    flavor = args.flavor
    if flavor:
        if flavor not in flavors:
            raise RuntimeError("No kernel installed with flavor " + flavor + "!" +
                               " Run 'pmbootstrap flasher list_flavors' to get a list.")
        return flavor
    if not len(flavors):
        raise RuntimeError(
            "No kernel flavors installed in chroot " + suffix + "! Please let"
            " your device package depend on a package starting with 'linux-'.")
    return flavors[0]


def _parse_suffix(args):
    if "rootfs" in args and args.rootfs:
        return "rootfs_" + args.device
    elif args.buildroot:
        if args.buildroot == "device":
            return "buildroot_" + args.deviceinfo["arch"]
        else:
            return "buildroot_" + args.buildroot
    elif args.suffix:
        return args.suffix
    else:
        return "native"


def aportgen(args):
    for package in args.packages:
        logging.info("Generate aport: " + package)
        pmb.aportgen.generate(args, package)


def build(args):
    # Strict mode: zap everything
    if args.strict:
        pmb.chroot.zap(args, False)

    if args.envkernel:
        pmb.build.envkernel.package_kernel(args)
        return

    # Set src and force
    src = os.path.realpath(os.path.expanduser(args.src[0])) if args.src else None
    force = True if src else args.force
    if src and not os.path.exists(src):
        raise RuntimeError("Invalid path specified for --src: " + src)

    # Build all packages
    for package in args.packages:
        arch_package = args.arch or pmb.build.autodetect.arch(args, package)
        if not pmb.build.package(args, package, arch_package, force,
                                 args.strict, src=src):
            logging.info("NOTE: Package '" + package + "' is up to date. Use"
                         " 'pmbootstrap build " + package + " --force'"
                         " if needed.")


def build_init(args):
    suffix = _parse_suffix(args)
    pmb.build.init(args, suffix)


def checksum(args):
    for package in args.packages:
        if args.verify:
            pmb.build.checksum.verify(args, package)
        else:
            pmb.build.checksum.update(args, package)


def chroot(args):
    # Suffix
    suffix = _parse_suffix(args)
    if (args.user and suffix != "native" and
            not suffix.startswith("buildroot_")):
        raise RuntimeError("--user is only supported for native or"
                           " buildroot_* chroots.")

    # apk: check minimum version, install packages
    pmb.chroot.apk.check_min_version(args, suffix)
    if args.add:
        pmb.chroot.apk.install(args, args.add.split(","), suffix)

    # Run the command as user/root
    if args.user:
        logging.info("(" + suffix + ") % su pmos -c '" +
                     " ".join(args.command) + "'")
        pmb.chroot.user(args, args.command, suffix, output=args.output)
    else:
        logging.info("(" + suffix + ") % " + " ".join(args.command))
        pmb.chroot.root(args, args.command, suffix, output=args.output)


def config(args):
    keys = pmb.config.config_keys
    if args.name and args.name not in keys:
        logging.info("NOTE: Valid config keys: " + ", ".join(keys))
        raise RuntimeError("Invalid config key: " + args.name)

    cfg = pmb.config.load(args)
    if args.value:
        cfg["pmbootstrap"][args.name] = args.value
        logging.info("Config changed: " + args.name + "='" + args.value + "'")
        pmb.config.save(args, cfg)
    elif args.name:
        value = cfg["pmbootstrap"].get(args.name, "")
        print(value)
    else:
        cfg.write(sys.stdout)

    # Don't write the "Done" message
    pmb.helpers.logging.disable()


def repo_missing(args):
    missing = pmb.helpers.repo_missing.generate(args, args.arch, args.overview,
                                                args.package, args.built)
    print(json.dumps(missing, indent=4))


def index(args):
    pmb.build.index_repo(args)


def initfs(args):
    pmb.chroot.initfs.frontend(args)


def install(args):
    if args.rsync and args.full_disk_encryption:
        raise ValueError("Installation using rsync is not compatible with full"
                         " disk encryption.")
    if args.rsync and not args.sdcard:
        raise ValueError("Installation using rsync only works on sdcard.")

    pmb.install.install(args)


def flasher(args):
    pmb.flasher.frontend(args)


def export(args):
    pmb.export.frontend(args)


def update(args):
    existing_only = not args.non_existing
    if not pmb.helpers.repo.update(args, args.arch, True, existing_only):
        logging.info("No APKINDEX files exist, so none have been updated."
                     " The pmbootstrap command downloads the APKINDEX files on"
                     " demand.")
        logging.info("If you want to force downloading the APKINDEX files for"
                     " all architectures (not recommended), use:"
                     " pmbootstrap update --non-existing")


def newapkbuild(args):
    # Check for SRCURL usage
    is_url = False
    for prefix in ["http://", "https://", "ftp://"]:
        if args.pkgname_pkgver_srcurl.startswith(prefix):
            is_url = True
            break

    # Sanity check: -n is only allowed with SRCURL
    if args.pkgname and not is_url:
        raise RuntimeError("You can only specify a pkgname (-n) when using"
                           " SRCURL as last parameter.")

    # Passthrough: Strings (e.g. -d "my description")
    pass_through = []
    for entry in pmb.config.newapkbuild_arguments_strings:
        value = getattr(args, entry[1])
        if value:
            pass_through += [entry[0], value]

    # Passthrough: Switches (e.g. -C for CMake)
    for entry in (pmb.config.newapkbuild_arguments_switches_pkgtypes +
                  pmb.config.newapkbuild_arguments_switches_other):
        if getattr(args, entry[1]) is True:
            pass_through.append(entry[0])

    # Passthrough: PKGNAME[-PKGVER] | SRCURL
    pass_through.append(args.pkgname_pkgver_srcurl)
    pmb.build.newapkbuild(args, args.folder, pass_through, args.force)


def kconfig(args):
    if args.action_kconfig == "check":
        # Default to all kernel packages
        packages = []
        if args.package == "" or args.package is None:
            for aport in glob.glob(args.aports + "/*/linux-*"):
                packages.append(os.path.basename(aport).split("linux-")[1])
        else:
            packages = [args.package]

        # Iterate over all kernels
        error = False
        skipped = 0
        packages.sort()
        for package in packages:
            if not args.force:
                aport = pmb.helpers.pmaports.find(args, "linux-" + package)
                apkbuild = pmb.parse.apkbuild(args, aport + "/APKBUILD")
                if "!pmb:kconfigcheck" in apkbuild["options"]:
                    skipped += 1
                    continue
            if not pmb.parse.kconfig.check(args, package, details=True):
                error = True

        # At least one failure
        if error:
            raise RuntimeError("kconfig check failed!")
        else:
            if skipped:
                logging.info("NOTE: " + str(skipped) + " kernel(s) was skipped"
                             " (consider 'pmbootstrap kconfig check -f')")
            logging.info("kconfig check succeeded!")
    elif args.action_kconfig == "edit":
        pmb.build.menuconfig(args, args.package)


def apkbuild_parse(args):
    # Default to all packages
    packages = args.packages
    if not packages:
        packages = pmb.helpers.pmaports.get_list(args)

    # Iterate over all packages
    for package in packages:
        print(package + ":")
        aport = pmb.helpers.pmaports.find(args, package)
        path = aport + "/APKBUILD"
        print(json.dumps(pmb.parse.apkbuild(args, path), indent=4,
                         sort_keys=True))


def apkindex_parse(args):
    result = pmb.parse.apkindex.parse(args, args.apkindex_path)
    if args.package:
        if args.package not in result:
            raise RuntimeError("Package not found in the APKINDEX: " +
                               args.package)
        result = result[args.package]
    print(json.dumps(result, indent=4))


def pkgrel_bump(args):
    would_bump = True
    if args.auto:
        would_bump = pmb.helpers.pkgrel_bump.auto(args, args.dry)
    else:
        # Each package must exist
        for package in args.packages:
            pmb.helpers.pmaports.find(args, package)

        # Increase pkgrel
        for package in args.packages:
            pmb.helpers.pkgrel_bump.package(args, package, dry=args.dry)

    if args.dry and would_bump:
        logging.info("Pkgrels of package(s) would have been bumped!")
        sys.exit(1)


def qemu(args):
    pmb.qemu.run(args)


def shutdown(args):
    pmb.chroot.shutdown(args)


def stats(args):
    # Chroot suffix
    suffix = "native"
    if args.arch != args.arch_native:
        suffix = "buildroot_" + args.arch

    # Install ccache and display stats
    pmb.chroot.apk.install(args, ["ccache"], suffix)
    logging.info("(" + suffix + ") % ccache -s")
    pmb.chroot.user(args, ["ccache", "-s"], suffix, output="stdout")


def work_migrate(args):
    # do nothing (pmb/__init__.py already did the migration)
    pmb.helpers.logging.disable()


def log(args):
    if args.clear_log:
        pmb.helpers.run.user(args, ["truncate", "-s", "0", args.log])
    pmb.helpers.run.user(args, ["tail", "-f", args.log, "-n", args.lines],
                         output="tui")


def log_distccd(args):
    logpath = "/home/pmos/distccd.log"
    if args.clear_log:
        pmb.chroot.user(args, ["truncate", "-s", "0", logpath])
    pmb.chroot.user(args, ["tail", "-f", logpath, "-n", args.lines],
                    output="tui")


def zap(args):
    pmb.chroot.zap(args, dry=args.dry, http=args.http,
                   distfiles=args.distfiles, pkgs_local=args.pkgs_local,
                   pkgs_local_mismatch=args.pkgs_local_mismatch,
                   pkgs_online_mismatch=args.pkgs_online_mismatch)

    # Don't write the "Done" message
    pmb.helpers.logging.disable()


def bootimg_analyze(args):
    bootimg = pmb.parse.bootimg(args, args.path)
    tmp_output = "Put these variables in the deviceinfo file of your device:\n"
    for line in pmb.aportgen.device.generate_deviceinfo_fastboot_content(args, bootimg).split("\n"):
        tmp_output += "\n" + line.lstrip()
    logging.info(tmp_output)