# Gather code related to command dealing with configuration.

from __future__ import annotations

import os

from typing import Any, Collection, Dict, Optional

from ..i18n import _

from .. import (

    cmdutil,

    error,

    formatter,

    pycompat,

    requirements,

    ui as uimod,

    util,

)

from . import (

    ConfigLevelT,

    EDIT_LEVELS,

    LEVEL_SHARED,

    NO_REPO_EDIT_LEVELS,

    rcutil,

)

EDIT_FLAG = 'edit'

def find_edit_level(

    ui: uimod.ui,

    repo,

    opts: Dict[str, Any],

) -> Optional[ConfigLevelT]:

    """return the level we should edit, if any.

    Parse the command option to detect when an edit is requested, and if so the

    configuration level we should edit.

    """

    if opts.get(EDIT_FLAG) or any(opts.get(o) for o in EDIT_LEVELS):

        cmdutil.check_at_most_one_arg(opts, *EDIT_LEVELS)

        for level in EDIT_LEVELS:

            if opts.get(level):

                return level

        return EDIT_LEVELS[0]

    return None

def edit_config(ui: uimod.ui, repo, level: ConfigLevelT) -> None:

    """let the user edit configuration file for the given level"""

    # validate input

    if repo is None and level not in NO_REPO_EDIT_LEVELS:

        msg = b"can't use --%s outside a repository" % pycompat.bytestr(level)

        raise error.InputError(_(msg))

    if level == LEVEL_SHARED:

        if not repo.shared():

            msg = _(b"repository is not shared; can't use --shared")

            raise error.InputError(msg)

        if requirements.SHARESAFE_REQUIREMENT not in repo.requirements:

            raise error.InputError(

                _(

                    b"share safe feature not enabled; "

                    b"unable to edit shared source repository config"

                )

            )

    # find rc files paths

    repo_path = None

    if repo is not None:

        repo_path = repo.root

    all_rcs = rcutil.all_rc_components(repo_path)

    rc_by_level = {}

    for lvl, rc_type, values in all_rcs:

        if rc_type != b'path':

            continue

        rc_by_level.setdefault(lvl, []).append(values)

    if level not in rc_by_level:

        msg = 'unknown config level: %s' % level

        raise error.ProgrammingError(msg)

    paths = rc_by_level[level]

    for f in paths:

        if os.path.exists(f):

            break

    else:

        samplehgrc = uimod.samplehgrcs.get(level)

        f = paths[0]

        if samplehgrc is not None:

            util.writefile(f, util.tonativeeol(samplehgrc))

    editor = ui.geteditor()

    ui.system(

        b"%s \"%s\"" % (editor, f),

        onerr=error.InputError,

        errprefix=_(b"edit failed"),

        blockedtag=b'config_edit',

    )

def show_component(ui: uimod.ui, repo) -> None:

    """show the component used to build the config

    XXX this skip over various source and ignore the repository config, so it

    XXX is probably useless old code.

    """

    for _lvl, t, f in rcutil.rccomponents():

        if t == b'path':

            ui.debug(b'read config from: %s\n' % f)

        elif t == b'resource':

            ui.debug(b'read config from: resource:%s.%s\n' % (f[0], f[1]))

        elif t == b'items':

            # Don't print anything for 'items'.

            pass

        else:

            raise error.ProgrammingError(b'unknown rctype: %s' % t)

def show_config(

    ui: uimod.ui,

    repo,

    value_filters: Collection[bytes],

    formatter_options: dict,

    untrusted: bool = False,

    all_known: bool = False,

    show_source: bool = False,

) -> bool:

    """Display config value to the user

    The display is done using a dedicated `formatter` object.

    :value_filters:

        if non-empty filter the display value according to these filters. If

        the filter does not match any value, the function return False. True

        otherwise.

    :formatter_option:

        options passed to the formatter

    :untrusted:

        When set, use untrusted value instead of ignoring them

    :all_known:

        Display all known config item, not just the one with an explicit value.

    :show_source:

        Show where each value has been defined.

    """

    fm = ui.formatter(b'config', formatter_options)

    selsections = selentries = []

    filtered = False

    if value_filters:

        selsections = [v for v in value_filters if b'.' not in v]

        selentries = [v for v in value_filters if b'.' in v]

        filtered = True

    uniquesel = len(selentries) == 1 and not selsections

    selsections = set(selsections)

    selentries = set(selentries)

    matched = False

    entries = ui.walkconfig(untrusted=untrusted, all_known=all_known)

    for section, name, value in entries:

        source = ui.configsource(section, name, untrusted)

        value = pycompat.bytestr(value)

        defaultvalue = ui.configdefault(section, name)

        if fm.isplain():

            source = source or b'none'

            value = value.replace(b'\n', b'\\n')

        entryname = section + b'.' + name

        if filtered and not (section in selsections or entryname in selentries):

            continue

        fm.startitem()

        fm.condwrite(show_source, b'source', b'%s: ', source)

        if uniquesel:

            fm.data(name=entryname)

            fm.write(b'value', b'%s\n', value)

        else:

            fm.write(b'name value', b'%s=%s\n', entryname, value)

        if formatter.isprintable(defaultvalue):

            fm.data(defaultvalue=defaultvalue)

        elif isinstance(defaultvalue, list) and all(

            formatter.isprintable(e) for e in defaultvalue

        ):

            fm.data(defaultvalue=fm.formatlist(defaultvalue, name=b'value'))

        # TODO: no idea how to process unsupported defaultvalue types

        matched = True

    fm.end()

    return matched