#compdef yaourt yaourt.static=yaourt
# ------------------------------------------------------------------------------
# Description
# -----------
#
#  Completion script for yaourt (https://archlinux.fr/yaourt-en)
#
# ------------------------------------------------------------------------------
# Authors
# -------
#
#  * zsh-users mailing list
#
# ------------------------------------------------------------------------------

# handles --help subcommand
_yaourt_action_help() {
    _arguments -s : \
        "$_yaourt_opts_commands[@]"
}

# handles cases where no subcommand has yet been given
_yaourt_action_none() {
    _arguments -s : \
        "$_yaourt_opts_commands[@]"
}

# handles --query subcommand
_yaourt_action_query() {
    local context state line
    typeset -A opt_args
    
#   _arguments -s : \
#       "$_yaourt_opts_common[@]" \
#       "$_yaourt_opts_query_actions[@]" \
#       "$_yaourt_opts_query_modifiers[@]"
    
    case $state in
        query_file)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_query_modifiers[@]" \
                '*:package file:_files -g "*.pkg.tar*"'
            ;;
        query_group)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_query_modifiers[@]" \
                '*:groups:_yaourt_completions_installed_groups'
            ;;
        query_owner)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_query_modifiers[@]" \
                '*:file:_files'
            ;;
        query_search)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_query_modifiers[@]" \
                '*:search text: '
            ;;
        *)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_query_actions[@]" \
                "$_yaourt_opts_query_modifiers[@]" \
                '*:package:_yaourt_completions_installed_packages'
            ;;
    esac
}

# handles --remove subcommand
_yaourt_action_remove() {
    _arguments -s : \
        "$_yaourt_opts_common[@]" \
        "$_yaourt_opts_remove[@]"
}

# handles --sync subcommand
_yaourt_action_sync() {
    local context state line
    typeset -A opt_args
    
#   _arguments -s : \
#       "$_yaourt_opts_common[@]" \
#       "$_yaourt_opts_sync_actions[@]" #\
#       #"$_yaourt_opts_sync_modifiers[@]"
    
    case $state in
        sync_clean)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_sync_modifiers[@]" \
                '*-c[remove old packages from cache]' \
                ;;
        sync_group)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_sync_modifiers[@]" \
                '*:package group:_yaourt_completions_all_groups'
            ;;
        sync_search)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_sync_modifiers[@]" \
                '*:search text: '
            ;;
        *)
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_sync_modifiers[@]" \
                '*:package:_yaourt_completions_all_packages'
            ;;
    esac
}

# handles --upgrade subcommand
_yaourt_action_upgrade() {
    _arguments -s : \
        "$_yaourt_opts_common[@]" \
        "$_yaourt_opts_pkgfile[@]"
}

# handles --version subcommand
_yaourt_action_version() {
    # no further arguments
    return 0
}

# provides completions for package groups
_yaourt_completions_all_groups() {
    local -a cmd groups
    _yaourt_get_command
    groups=( $(_call_program groups $cmd[@] -Sg) )
    typeset -U groups
    compadd "$@" -a groups
}

# provides completions for packages available from repositories
# these can be specified as either 'package' or 'repository/package'
_yaourt_completions_all_packages() {
    local -a cmd packages repositories packages_long
    _yaourt_get_command

    if compset -P1 '*/*'; then
        packages=( $(_call_program packages $cmd[@] -Sql ${words[CURRENT]%/*}) )
        typeset -U packages
        if [[ -d /var/aur ]]; then
            packages=( $packages $(ls /var/aur) )
        fi
        _wanted repo_packages expl "repository/package" compadd ${(@)packages}
    else
        packages=( $(_call_program packages $cmd[@] -Sql) )
        typeset -U packages
        if [[ -d /var/aur ]]; then
            packages=( $packages $(ls /var/aur) )
        fi
        _wanted packages expl "packages" compadd - "${(@)packages}"

        repositories=(${(o)${${${(M)${(f)"$(</etc/pacman.conf)"}:#\[*}/\[/}/\]/}:#options})
        typeset -U repositories
        _wanted repo_packages expl "repository/package" compadd -S "/" $repositories
    fi
}

# provides completions for package groups
_yaourt_completions_installed_groups() {
    local -a cmd groups
    _yaourt_get_command
    groups=(${(o)${(f)"$(_call_program groups $cmd[@] -Qg)"}% *})
    typeset -U groups
    compadd "$@" -a groups
}

# provides completions for installed packages
_yaourt_completions_installed_packages() {
    local -a cmd packages packages_long
    packages_long=(/var/lib/pacman/local/*(/))
    packages=( ${${packages_long#/var/lib/pacman/local/}%-*-*} )
    compadd "$@" -a packages
}

# provides completions for repository names
_yaourt_completions_repositories() {
    local -a cmd repositories
    repositories=(${(o)${${${(M)${(f)"$(</etc/pacman.conf)"}:#\[*}/\[/}/\]/}:#options})
    # Uniq the array
    typeset -U repositories
    compadd "$@" -a repositories
}

# builds command for invoking pacman in a _call_program command - extracts
# relevant options already specified (config file, etc)
# $cmd must be declared by calling function
_yaourt_get_command() {
    # this is mostly nicked from _perforce
    cmd=$( grep "^PACMAN=" "/etc/yaourtrc" \
           && grep "^PACMAN=" "/etc/yaourtrc" | cut -c8- \
           || echo "pacman" )
    integer i
    for (( i = 2; i < CURRENT - 1; i++ )); do
        if [[ ${words[i]} = "--config" || ${words[i]} = "--root" ]]; then
            cmd+=( ${words[i,i+1]} )
        fi
    done
}

# main dispatcher
_yaourt() {
    typeset -A opt_args

    # options for passing to _arguments: main pacman commands
    typeset -a _yaourt_opts_commands
    _yaourt_opts_commands=(
        '-Q[query the package database]'
        '-R[remove a package from the system]'
        '-S[synchronize packages]'
        '-U[upgrade a package]'
        '-V[display version and exit]'
        '-h[display usage information]'
        '-B[backup pacman database]'
        '-G[get PKGBUILD]'
        '-C[clean backup files]'
        '--stats[package statistics]'
    )

    # options for passing to _arguments: options common to all commands
    typeset -a _yaourt_opts_common
    _yaourt_opts_common=(
        '-b[alternate database location]:database_location:_files -/'
        '-h[display syntax for the given operation]'
        '-r[alternate installation root]:installation root:_files -/'
        '-v[be more verbose]'
        '--cachedir[specify alternate package cache location]:cache_location:_files -/'
        '--config[specify alternate configuration file]:config file:_files'
        '--debug[display debug messages]'
        '--gpgdir[specify alternate GnuPG home directory]:gpg_directory:_files -/'
        '--logfile[specify alternate log file]:config file:_files'
        "--noconfirm[don't ask for confirmation]"
        "--noprogressbar[don't show a progress bar when downloading files]"
        "--noscriptlet[don't execute the install scriptlet if one exists]"
        '--print[only print the targets instead of performing the operation]'
    )

    # options for passing to _arguments: options for --upgrade commands
    typeset -a _yaourt_opts_pkgfile
    _yaourt_opts_pkgfile=(
        '-d[skip dependency checks]'
        '-f[overwrite conflicting files]'
        '*:package file:_files -g "*.pkg.tar*(.)"'
    )

    # options for passing to _arguments: subactions for --query command
    typeset -a _yaourt_opts_query_actions
    _yaourt_opts_query_actions=(
        '-g[view all members of a package group]:*:package groups:->query_group'
        '-o[query the package that owns a file]:file:_files'
        '-p[package file to query]:*:package file:->query_file'
        '-s[search package names and descriptions]:*:search text:->query_search'
    )

    # options for passing to _arguments: options for --query and subcommands
    typeset -a _yaourt_opts_query_modifiers
    _yaourt_opts_query_modifiers=(
        '-c[list package changelog]'
        '-d[list packages installed as dependencies]'
        '-e[list packages explicitly installed]'
        '-i[view package information]'
        '-ii[view package information including backup files]'
        '-k[check package files]'
        '-l[list package contents]'
        '-m[list installed packages not found in sync db(s)]'
        '-t[list packages not required by any package]'
        '-u[list packages that can be upgraded]'
        '--aur[install packages from aur, even if they are in community, or, with the -u option, update packages installed from aur]'
        '--devel[used with -u updates all cvs/svn/git/hg/bzr packages]'
        '--date[list packages sorted in ascending order (oldest first) by installation date]'
    )

    # options for passing to _arguments: options for --remove command
    typeset -a _yaourt_opts_remove
    _yaourt_opts_remove=(
        '-c[remove all dependent packages]'
        '-d[skip dependency checks]'
        "-k[only remove database entry, don't remove files]"
        '-n[remove protected configuration files]'
        '-s[remove dependencies not required by other packages]'
        '*:installed package:_yaourt_completions_installed_packages'
    )

    # options for passing to _arguments: options for --sync command
    typeset -a _yaourt_opts_sync_actions
    _yaourt_opts_sync_actions=(
        '*-c[remove old packages from cache]:*:clean:->sync_clean'
        '*-cc[remove all packages from cache]:*:clean:->sync_clean'
        '-g[view all members of a package group]:*:package group:->sync_group'
        '-s[search package names and descriptions]:*:search text:->sync_search'
    )

    # options for passing to _arguments: options for --sync command
    typeset -a _yaourt_opts_sync_modifiers
    _yaourt_opts_sync_modifiers=(
        '-d[skip dependency checks]'
        '-f[overwrite conflicting files]'
        '-i[view package information]'
        '-l[list all packages in a repository]'
        '-p[print download URIs for each package to be installed]'
        '-u[upgrade all out-of-date packages]'
        '-w[download packages only]'
        '-y[download fresh package databases]'
        '*--ignore[ignore a package upgrade]:package:
            _yaourt_completions_all_packages'
        '*--ignoregroup[ignore a group upgrade]:package group:
            _yaourt_completions_all_groups'
        '--asdeps[install packages as non-explicitly installed]'
        '--asexplicit[install packages as explicitly installed]'
        "--needed[don't reinstall up to date packages]"
        '--devel[used with -u updates all cvs/svn/git/hg/bzr packages]'
    )

    case $words[2] in
        -Q*g*) # ipkg groups
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_query_modifiers[@]" \
                '*:groups:_yaourt_completions_installed_groups'
            ;;
        -Q*o*) # file
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_query_modifiers[@]" \
                '*:package file:_files'
            ;;
        -Q*p*) # file *.pkg.tar*
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_query_modifiers[@]" \
                '*:package file:_files -g "*.pkg.tar*"'
            ;;
        -Q*)  _yaourt_action_query    ;;
        -R*)  _yaourt_action_remove   ;;
        -S*c*) # no completion
            return 0
            ;;
        -S*l*) # repos
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_sync_modifiers[@]" \
                '*:package repo:_yaourt_completions_repositories' \
                ;;
        -S*g*) # pkg groups
            _arguments -s : \
                "$_yaourt_opts_common[@]" \
                "$_yaourt_opts_sync_modifiers[@]" \
                '*:package group:_yaourt_completions_all_groups'
            ;;
        -S*)  _yaourt_action_sync     ;;
        -U*)  _yaourt_action_upgrade  ;;
        -V*)  _yaourt_action_version  ;;
        -h*)  _yaourt_action_help     ;;
        -  )  _yaourt_action_none     ;;
        *  )  return 1                ;;
    esac
}

# run the main dispatcher
_yaourt "$@"