"""Compile a QMK Firmware.

You can compile a keymap already in the repo or using a QMK Configurator export.
"""
from argcomplete.completers import FilesCompleter

from milc import cli

import qmk.path
from qmk.constants import QMK_FIRMWARE
from qmk.decorators import automagic_keyboard, automagic_keymap
from qmk.commands import compile_configurator_json, create_make_command, parse_configurator_json, build_environment
from qmk.keyboard import keyboard_completer, keyboard_folder_or_all, is_all_keyboards
from qmk.keymap import keymap_completer, locate_keymap
from qmk.cli.generate.compilation_database import write_compilation_database


def _is_keymap_target(keyboard, keymap):
    if keymap == 'all':
        return True

    if locate_keymap(keyboard, keymap):
        return True

    return False


@cli.argument('filename', nargs='?', arg_only=True, type=qmk.path.FileType('r'), completer=FilesCompleter('.json'), help='The configurator export to compile')
@cli.argument('-kb', '--keyboard', type=keyboard_folder_or_all, completer=keyboard_completer, help='The keyboard to build a firmware for. Ignored when a configurator export is supplied.')
@cli.argument('-km', '--keymap', completer=keymap_completer, help='The keymap to build a firmware for. Ignored when a configurator export is supplied.')
@cli.argument('-n', '--dry-run', arg_only=True, action='store_true', help="Don't actually build, just show the make command to be run.")
@cli.argument('-j', '--parallel', type=int, default=1, help="Set the number of parallel make jobs; 0 means unlimited.")
@cli.argument('-e', '--env', arg_only=True, action='append', default=[], help="Set a variable to be passed to make. May be passed multiple times.")
@cli.argument('-c', '--clean', arg_only=True, action='store_true', help="Remove object files before compiling.")
@cli.argument('--compiledb', arg_only=True, action='store_true', help="Generates the clang compile_commands.json file during build. Implies --clean.")
@cli.subcommand('Compile a QMK Firmware.')
@automagic_keyboard
@automagic_keymap
def compile(cli):
    """Compile a QMK Firmware.

    If a Configurator export is supplied this command will create a new keymap, overwriting an existing keymap if one exists.

    If a keyboard and keymap are provided this command will build a firmware based on that.
    """
    if is_all_keyboards(cli.args.keyboard):
        from .mass_compile import mass_compile
        cli.args.builds = []
        cli.args.filter = []
        cli.args.no_temp = False
        return mass_compile(cli)

    # Build the environment vars
    envs = build_environment(cli.args.env)

    # Determine the compile command
    commands = []

    current_keyboard = None
    current_keymap = None

    if cli.args.filename:
        # If a configurator JSON was provided generate a keymap and compile it
        user_keymap = parse_configurator_json(cli.args.filename)
        commands = [compile_configurator_json(user_keymap, parallel=cli.config.compile.parallel, clean=cli.args.clean, **envs)]

    elif cli.config.compile.keyboard and cli.config.compile.keymap:
        # Generate the make command for a specific keyboard/keymap.
        if not _is_keymap_target(cli.config.compile.keyboard, cli.config.compile.keymap):
            cli.log.error('Invalid keymap argument.')
            cli.print_help()
            return False

        if cli.args.clean:
            commands.append(create_make_command(cli.config.compile.keyboard, cli.config.compile.keymap, 'clean', **envs))
        commands.append(create_make_command(cli.config.compile.keyboard, cli.config.compile.keymap, parallel=cli.config.compile.parallel, **envs))

        current_keyboard = cli.config.compile.keyboard
        current_keymap = cli.config.compile.keymap

    if not commands:
        cli.log.error('You must supply a configurator export, both `--keyboard` and `--keymap`, or be in a directory for a keyboard or keymap.')
        cli.print_help()
        return False

    if cli.args.compiledb:
        if current_keyboard is None or current_keymap is None:
            cli.log.error('You must supply both `--keyboard` and `--keymap` or be in a directory with a keymap to generate a compile_commands.json file.')
            cli.print_help()
            return False
        write_compilation_database(current_keyboard, current_keymap, QMK_FIRMWARE / 'compile_commands.json')

    cli.log.info('Compiling keymap with {fg_cyan}%s', ' '.join(commands[-1]))
    if not cli.args.dry_run:
        cli.echo('\n')
        for command in commands:
            ret = cli.run(command, capture_output=False)
            if ret.returncode:
                return ret.returncode