#!/bin/zsh
# List git worktrees with creation timestamps, sorted oldest to newest

wt_path="" branch=""
typeset -a ts_arr wt_arr br_arr

flush() {
    [[ -z $wt_path ]] && return
    local epoch=$(stat -f '%B' "$wt_path" 2>/dev/null)
    ts_arr+=("${epoch:-0}")
    wt_arr+=("$wt_path")
    br_arr+=("${branch:-(detached)}")
    wt_path="" branch=""
}

while IFS= read -r line; do
    case $line in
        worktree\ *)  flush; wt_path=${line#worktree } ;;
        branch\ *)    branch=${line#branch refs/heads/} ;;
        detached)     branch="(detached)" ;;
        "")           flush ;;
    esac
done < <(git worktree list --porcelain)
flush

# Find max branch width for column alignment
integer max_br=0
for br in "${br_arr[@]}"; do
    (( ${#br} > max_br )) && max_br=${#br}
done

# Print first entry (main worktree) always first
printf "%s  %-${max_br}s  %s\n" "$(date -r "${ts_arr[1]}"
+"%Y-%m-%d")" "${br_arr[1]}" "${wt_arr[1]}"

# Collect remaining entries prefixed with epoch for numeric sort
typeset -a rest_lines
for (( i=2; i<=${#ts_arr}; i++ )); do
    rest_lines+=("${ts_arr[$i]}  $(printf "%-${max_br}s  %s"
"${br_arr[$i]}" "${wt_arr[$i]}")")
done

# Sort numerically by epoch, then replace epoch with formatted date
(( ${#rest_lines} > 0 )) && print -l "${(on)rest_lines[@]}" | while
IFS= read -r line; do
    epoch=${line%% *}
    printf "%s  %s\n" "$(date -r "$epoch" +"%Y-%m-%d")" "${line#*  }"
done