GITCRUX_ARROW_RIGHT=("" "")
GITCRUX_ARROW_LEFT=("" "")

#                     bg  fg
GITCRUX_COLOR_REMOTE=(220 0)

# Center the given $1 text with spaces to fit a string of length $2.
_gitcrux_centered() {
    local text width padl padr span diff i
    text="$1"
    width="$2"

    if (( ${#text} > width )); then
        return 2
    elif (( ${#text} == width )); then
        gitcrux_centered="$text"
        return 0
    fi

    span=$((width - ${#text}))
    diff=$(( span/2 ))
    padl=""
    padr=""
    for (( i=0; i < diff; i++ )) ; do
        padl+=" "
        padr+=" "
    done

    if (( span % 2 > 0 )); then
        padr+=" "
    fi

    gitcrux_centered="${padl}${text}${padr}"
}

_gitcrux_arrow() {
    local in start end color from to text color_body color_ends

    in="$1"
    start="$2"
    end="$3"
    color="$4"
    from=$(($5 * GITCRUX_COL_WIDTH - GITCRUX_COL_WIDTH/2))
    to=$(($6 * GITCRUX_COL_WIDTH - GITCRUX_COL_WIDTH/2 - 1))
    text="$7"

    local lp_terminal_format
    lp_terminal_format ${color}
    color_body="$lp_terminal_format"
    lp_terminal_format -3 -1
    color_ends="$lp_terminal_format"

    span=$((to-from-${#start}-${#end}))
    if (( from > ${#in} || to > ${#in} )); then
        return 2
    else
        if (( ${#text} > span )); then
            return 3
        fi
    fi

    _gitcrux_centered "$text" $span

    gitcrux_arrow="${in:0:from}${color_ends}${start}${color_body}${gitcrux_centered}${color_ends}${end}${NO_COL}${in:to:${#in}}"
}

_gitcrux_VCS() {
    GITCRUX_COL_WIDTH=11
    GITCRUX_VCS="${n}"

    local head_remote head_stage head_branch

    head_remote="origin" # TODO

    LP_TIME_ANALOG=1
    _lp_analog_time
    head_stage="$lp_analog_time"

    if _lp_vcs_branch; then
        head_branch="$lp_vcs_branch"

        if _lp_vcs_bookmark; then
            head_branch+=": $lp_vcs_bookmark"
        fi
    elif _lp_vcs_bookmark; then
        head_branch="$lp_vcs_bookmark"
    elif _lp_vcs_tag; then
        head_branch="tag: $lp_vcs_tag"
    else
        _lp_vcs_commit_id
        head_branch="${lp_vcs_commit_id:0:7}"
    fi

    _GITCRUX_HEAD_STASH="stash"

    header=""
    line=""
    for col in "${head_remote}" "${_GITCRUX_HEAD_REPO}" "${head_stage}" "${head_branch}" "${_GITCRUX_HEAD_STASH}"; do

        _gitcrux_centered "│" $GITCRUX_COL_WIDTH
        line+="$gitcrux_centered"

        if ((${#col}+1 > GITCRUX_COL_WIDTH)); then
            header+="${col:0:GITCRUX_COL_WIDTH-1}…"
        elif ((${#col}+1 == GITCRUX_COL_WIDTH)); then
            header+="${col}"
        else
            _gitcrux_centered "${col}" $GITCRUX_COL_WIDTH
            header+="$gitcrux_centered"
        fi
    done
    GITCRUX_VCS+="${header}${n}"
    GITCRUX_VCS+="${line}${n}"
    _gitcrux_arrow "$line" ${GITCRUX_ARROW_RIGHT[@]} "0 220 1" 1 4 "pull"
    GITCRUX_VCS+="${gitcrux_arrow}${n}"

}


# This function is called when the prompt is activated,
# either at the very beginning of the shell session,
# either when the user call `lp_theme`.
_lp_gitcrux_theme_activate() {
    _lp_default_theme_activate
}

# This function is called everytime the user change their directory.
# It should set up any data that does not change when the user stays in the same directory.
_lp_gitcrux_theme_directory() {
    _lp_default_theme_directory

    _GITCRUX_HEAD_REPO="${PWD##*/}"
}

# This function is called every time the prompt is displayed,
# that is, between commands.
_lp_gitcrux_theme_prompt() {
    _lp_default_theme_prompt_data
    local n=$'\n'
    if [[ -z "${LP_PS1-}" ]]; then
        # Add user-defined prefix, battery, load, temperature, wifi and jobs.
        PS1="${LP_PS1_PREFIX}${LP_BATT}${LP_LOAD}${LP_TEMP}${LP_WIFI}${LP_JOBS}"
        # Add multiplexer brackets, user, host, permissions colon, working directory, dirstack, proxy, watched environment variables and nested shell level.
        PS1+="${LP_BRACKET_OPEN}${LP_USER}${LP_HOST}${LP_PERM}${LP_PWD}${LP_DIRSTACK}${LP_BRACKET_CLOSE}${LP_PROXY}${LP_ENVVARS}${LP_SHLVL}"

        # Add the list of development environments/config/etc.
        PS1+="${LP_DEV_ENV}"

        # Add last runtime, return code & meaning.
        PS1+="${LP_RUNTIME}${LP_ERR}${LP_ERR_MEANING}"

        # Add VCS infos
        # If root, the info has not been collected unless LP_ENABLE_VCS_ROOT
        # is set.
        if [[ -n ${LP_VCS-} ]]; then
            _gitcrux_VCS
            PS1+="${n}${GITCRUX_VCS}"
        fi

        # prompt mark and user-defined postfix
        PS1+="${n}${LP_MARK_PREFIX}${LP_COLOR_MARK}${LP_MARK}${LP_PS1_POSTFIX}"

        # Get the core sections without prompt escapes and make them into a title.
        _lp_formatted_title "${LP_PS1_PREFIX}${LP_BRACKET_OPEN}${LP_USER}${LP_HOST}${LP_MARK_PERM}${lp_path-}${LP_BRACKET_CLOSE}${LP_MARK_PREFIX}${LP_MARK}${LP_PS1_POSTFIX}"
    else
        PS1=$LP_PS1
    fi
}