#compdef yadm

_yadm-alt() {
    return 0
}

_yadm-bootstrap() {
    return 0
}

_yadm-clone() {
    _arguments \
        '(--bootstrap --no-bootstrap)--bootstrap[force bootstrap, without prompt]' \
        '(--bootstrap --no-bootstrap)--no-bootstrap[prevent bootstrap, without prompt]' \
        '-b[branch name]:' \
        '-f[force overwrite of existing repository]' \
        '-w[work tree path]: :_files -/' \
        '*:'
}

_yadm-config() {
    # TODO: complete config names
}

_yadm-decrypt() {
    _arguments \
        '-l[list files]'
}

_yadm-encrypt() {
    return 0
}

_yadm-enter() {
    _arguments \
        ':command: _command_names -e' \
        '*::arguments: _normal'
}

_yadm-git-crypt() {
    # TODO: complete git-crypt options
}

_yadm-gitconfig() {
    integer ret=1
    _call_function ret _git-config
    return ret
}

_yadm-help() {
    return 0
}

_yadm-init() {
    _arguments \
        '-f[force overwrite of existing repository]' \
        '-w[work tree path]: :_files -/'
}

_yadm-list() {
    _arguments \
        '-a[list all tracked files]'
}

_yadm-perms() {
    return 0
}

_yadm-transcrypt() {
    integer ret=1
    _call_function ret _transcrypt
    return ret
}

_yadm-upgrade() {
    return 0
}

_yadm-version() {
    return 0
}

_yadm_commands() {
    local -a commands
    commands=(
        alt:'create links for alternates (yadm)'
        bootstrap:'execute bootstrap (yadm)'
        clone:'clone an existing repository (yadm)'
        config:'configure an yadm setting'
        decrypt:'decrypt files (yadm)'
        encrypt:'encrypt files (yadm)'
        enter:'run sub-shell with GIT variables set'
        git-crypt:'run git-crypt commands for the yadm repository'
        gitconfig:'run the git config command'
        help:'display yadm help information'
        init:'initialize an empty yadm repository'
        list:'list files tracked by yadm'
        perms:'fix perms for private files (yadm)'
        transcrypt:'run transcrypt commands for the yadm repository'
        upgrade:'upgrade legacy yadm paths'
        version:'show yadm version'
    )

    zstyle ':completion:*:*:yadm:*' user-commands $commands

    integer ret=1
    _call_function ret _git_commands

    zstyle -d ':completion:*:*:yadm:*' user-commands
    return ret
}

_yadm() {
    local curcontext=$curcontext state line
    declare -A opt_args

    _arguments -C \
      '(-Y --yadm-dir)'{-Y,--yadm-dir}'[override the standard yadm directory]: :_files -/' \
      '--yadm-data[override the standard yadm data directory]: :_files -/' \
      '--yadm-repo[override the standard repo path]: :_files -/' \
      '--yadm-config[override the standard config path]: :_files -/' \
      '--yadm-encrypt[override the standard encrypt path]: :_files -/' \
      '--yadm-archive[override the standard archive path]: :_files -/' \
      '--yadm-bootstrap[override the standard bootstrap path]: :_files' \
      '-d[print debug traces]' \
      '--help[display yadm help information]' \
      '--version[show yadm version]' \
      '(-): :->command' \
      '(-)*:: :->option-or-argument' && return

    local -a repo_args
    (( $+opt_args[--yadm-repo] )) && repo_args+=(--yadm-repo "$opt_args[--yadm-repo]")
    (( $+opt_args[--yadm-data] )) && repo_args+=(--yadm-data "$opt_args[--yadm-data]")
    local -x GIT_DIR="$(_call_program gitdir yadm "${repo_args[@]}" introspect repo)"

    integer ret=1
    case $state in
        (command)
            _yadm_commands && ret=0
            ;;
        (option-or-argument)
            curcontext=${curcontext%:*:*}:yadm-$words[1]:

            if ! _call_function ret _yadm-$words[1]; then
                curcontext=${curcontext%:*:*}:git-$words[1]:
                if ! _call_function ret _git-$words[1]; then
                    if [[ $words[1] = \!* ]]; then
                        words[1]=${words[1]##\!}
                        _normal && ret=0
                    elif zstyle -T :completion:$curcontext: use-fallback; then
                        _default && ret=0
                    else
                        _message "unknown sub-command: $words[1]"
                    fi
                fi
            fi
            ;;
    esac

    return ret
}

(( $+functions[_git_commands] )) || _git
_yadm "$@"