#! /usr/bin/env python3

"""
GiteaPC is an automated installer/updated for repositories of the Planète Casio
Git forge (https://git.planet-casio.com/). It is mainly used to set up installs
of the add-in development fxSDK.
"""

# Install prefix (inserted at compile-time)
PREFIX = "%PREFIX%"
# Program version (inserted at compile-time)
VERSION = "%VERSION%"

import sys
sys.path.append(PREFIX + "/lib/giteapc")

import giteapc.repo
from giteapc.util import *
from giteapc.config import REPO_FOLDER, PREFIX_FOLDER
import getopt
import sys
import os

# TODO:
# * build, install: test repository update logic
# * install: test dependency logic

usage_string = """
usage: {R}giteapc{_} [{R}list{_}|{R}fetch{_}|{R}show{_}|{R}build{_}|{R}install{_}|{R}uninstall{_}] [{g}{i}ARGS...{_}]

GiteaPC is a tool to automatically clone, install and update repositories from
the Planète Casio Git forge. In the following commands, each {g}{i}REPOSITORY{_}
is either a full name like "Lephenixnoir/sh-elf-gcc", or a short name like
"sh-elf-gcc" when there is no ambiguity.

{R}giteapc list{_} [{R}-r{_}] [{g}{i}PATTERN{_}]
  List all repositories on this computer. With -r, list repositories on the
  forge. A wildcard pattern can be specified to filter the results.
{R}giteapc install{_} [{R}--https{_}|{R}--ssh{_}] [{R}-u{_}] [{R}-y{_}] [{R}-n{_}] {g}{i}REPOSITORY{_}[{R}@{_}{g}{i}VERSION{_}][{R}:{_}{g}{i}CONFIG{_}]{g}{i}...{_}
  Fetch repositories and their dependencies, then build and install them.
  With -u, pulls local repositories (update mode). With -y, do not ask for
  interactive confirmation. With -n, don't build or install (dry run).
{R}giteapc uninstall{_} [{R}-k{_}] {g}{i}REPOSITORY...{_}
  Uninstall the build products of the specified repositories and remove the
  source files. With -k, keep the source files.

Advanced commands:

{R}giteapc fetch{_} [{R}--https{_}|{R}--ssh{_}] [{R}-u{_}] [{R}-f{_}] [{g}{i}REPOSITORY{_}[{R}@{_}{g}{i}VERSION{_}]{g}{i}...{_}]
  Clone, fetch, or pull a repository. If no repository is specified, fetches
  all local repositories. HTTPS or SSH can be selected when cloning (HTTPS by
  default). With -u, pulls after fetching.
{R}giteapc show{_} [{R}-r{_}] [{R}-p{_}] {g}{i}REPOSITORY...{_}
  Show the branches and tags (versions) for the specified local repositories.
  With -r, show information for remote repositories on the forge.
  With -p, just print the path of local repositories (useful in scripts).
{R}giteapc build{_} [{R}-i{_}] [{R}--skip-configure{_}] {g}{i}REPOSITORY{_}[{R}@{_}{g}{i}VERSION{_}][{R}:{_}{g}{i}CONFIG{_}]{g}{i}...{_}
  Configure and build a local repository. A specific configuration can be
  requested. With -i, also install if build is successful. --skip-configure
  builds without configuring (useful for rebuilds).

{W}Important folders{_}

{R}$GITEAPC_HOME{_} or {R}$XDG_DATA_HOME/giteapc{_} or {R}$HOME/.local/share/giteapc{_}
{W}->{_} {b}{}{_}
  Storage for GiteaPC repositories.
{R}$GITEAPC_PREFIX{_} or {R}$HOME/.local{_}
{W}->{_} {b}{}{_}
  Default install prefix.
""".format(REPO_FOLDER, PREFIX_FOLDER, **colors()).strip()

def usage(exitcode=None):
    print(usage_string, file=sys.stderr)
    if exitcode is not None:
        sys.exit(exitcode)

commands = {
    "list": {
        "function": giteapc.repo._list,
        "args": "remote:-r,--remote",
    },
    "fetch": {
        "function": giteapc.repo.fetch,
        "args": "use_ssh:--ssh use_https:--https force:-f,--force "+\
                "update:-u,--update",
    },
    "show": {
        "function": giteapc.repo.show,
        "args": "remote:-r,--remote path:-p,--path-only",
    },
    "build": {
        "function": giteapc.repo.build,
        "args": "install:-i,--install skip_configure:--skip-configure",
    },
    "install": {
        "function": giteapc.repo.install,
        "args": "use_ssh:--ssh use_https:--https update:-u,--update "+\
                "yes:-y,--yes dry_run:-n,--dry-run",
    },
    "uninstall": {
        "function": giteapc.repo.uninstall,
        "args": "keep:-k,--keep",
    },
}

def main(argv, commands):
    # Help, version, and invocations without a proper command name
    if "-h" in argv or "--help" in argv:
        usage(0)
    if "-v" in argv or "--version" in argv:
        print(f"GiteaPC {VERSION}")
        return 0
    if argv == [] or argv[0] not in commands:
        usage(1)

    args = commands[argv[0]].get("args","").split()
    args = [x.split(":",1) for x in args]
    args = [(name,forms.split(",")) for name, forms in args]

    single = ""
    double = []
    for name, forms in args:
        for f in forms:
            if f.startswith("--"):
                double.append(f[2:])
            elif f[0] == "-" and len(f) == 2:
                single += f[1]
            else:
                raise Exception("invalid argument format o(x_x)o")

    # Parse arguments
    try:
        opts, data = getopt.gnu_getopt(argv[1:], single, double)
        opts = { name: True if val == "" else val for (name,val) in opts }
    except getopt.GetoptError as e:
        return fatal(e)

    options = {}
    for (o,val) in opts.items():
        for (name, forms) in args:
            if o in forms:
                options[name] = val

    try:
        return commands[argv[0]]["function"](*data, **options)
    except Error as e:
        return fatal(e)

if __name__ == "__main__":
    sys.exit(main(sys.argv[1:], commands))