# shellcheck shell=bash
# Check for bash
[ -z "$BASH_VERSION" ] && return

####################################################################################################

__flatpak_coredumpctl() {
    local cur prev words cword
    _comp_initialize -n = -- "$@" || return

    local IFS=$' \n'
    local subcommands="debug list"

    # taken from coredumpctl's bash completion
    local -a journal_fields=(MESSAGE{,_ID} PRIORITY CODE_{FILE,LINE,FUNC}
                             ERRNO SYSLOG_{FACILITY,IDENTIFIER,PID} COREDUMP_EXE
                             _{P,U,G}ID _COMM _EXE _CMDLINE
                             _AUDIT_{SESSION,LOGINUID}
                             _SYSTEMD_{CGROUP,SESSION,UNIT,OWNER_UID}
                             _SELINUX_CONTEXT _SOURCE_REALTIME_TIMESTAMP
                             _{BOOT,MACHINE}_ID _HOSTNAME _TRANSPORT
                             _KERNEL_{DEVICE,SUBSYSTEM}
                             _UDEV_{SYSNAME,DEVNODE,DEVLINK}
                             __CURSOR __{REALTIME,MONOTONIC}_TIMESTAMP)

    # subcommand completion
    if [[ $cword -eq 1 ]]; then
        readarray -t COMPREPLY < <(compgen -W "${subcommands}" -- "$cur")
        return
    fi

    local subcommand="${words[1]}"

    # coredumpctl matches completion
    local -a journal_field_vals
    if [[ ${words[cword]} == ?*= ]]; then
        # just skip these completions if coredumpctl is missing
        if ! command -v coredumpctl >/dev/null 2>&1; then
            return
        fi
        readarray -t journal_field_vals < <(coredumpctl -F "${cur%=*}" 2>/dev/null)
        readarray -t COMPREPLY < <(compgen -W "${journal_field_vals[*]}" -- "${cur#*=}")
        return
    fi

    # debug subcommand
    if [[ $subcommand == "debug" ]]; then
        case "$prev" in
            -b|--build-directory)
                compopt -o filenames
                readarray -t COMPREPLY < <(compgen -d -- "$cur")
                return
                ;;
            -m|--coredumpctl-matches)
                compopt -o nospace
                readarray -t COMPREPLY < <(compgen -W "${journal_fields[*]}" -S= -- "$cur")
                return
                ;;
        esac

        case "$cur" in
            -*)
                readarray -t COMPREPLY < <(compgen -W "\
                    -b --build-directory \
                    -m --coredumpctl-matches \
                    --extra-flatpak-args \
                    --gdb-arguments \
                " -- "$cur")
                return
                ;;
            *)
                # slightly hacky way of reusing flatpak's own
                # completion helper to complete the app ids
                local -a RES
                readarray -t RES < <(flatpak complete "flatpak run $cur" "$COMP_POINT" "$cur")
                COMPREPLY=()
                local r
                for r in "${RES[@]}"; do
                    [[ $r == __FLATPAK_* ]] && continue
                    COMPREPLY+=("$r")
                done
                return
                ;;
        esac
    fi

    # list subcommand
    if [[ $subcommand == "list" ]]; then
        case "$cur" in
            -*)
                readarray -t COMPREPLY < <(compgen -W "\
                    --show-inaccessible \
                    --reverse -r \
                    --no-pager \
                " -- "$cur")
                return
                ;;
            *)
                compopt -o nospace
                readarray -t COMPREPLY < <(compgen -W "${journal_fields[*]}" -S= -- "$cur")
                return
                ;;
        esac
    fi
}

####################################################################################################

complete -F __flatpak_coredumpctl flatpak-coredumpctl