#!/usr/bin/env bash
set -euo pipefail
# POS: docker ps — Enhanced container overview (health, IPs, ports, uptime)
source "$(dirname "$0")/../lib/common.sh" 2>/dev/null || source "$(dirname "$0")/common.sh"

usage() {
    cat <<EOF
Usage: pos docker ps

Display enhanced Docker container overview with health status,
uptime, IPs, and port mappings.
EOF
    exit 0
}

command -v docker &>/dev/null || err "docker not found — install it with: sudo apt install docker.io"

case "${1:-}" in
    -h|--help) usage ;;
esac

if ! container_ids=$(docker ps -q 2>/dev/null) || [[ -z "$container_ids" ]]; then
    echo "No running containers."
    exit 0
fi

healthy_count=0
unhealthy_count=0
running_count=0
total_count=0

printf "%-28s %-35s %-22s %-10s %-35s %-20s %s\n" \
    "NAME" "IMAGE" "STATUS(HEALTH)" "UPTIME" "IPS" "PORTS" "CONTAINER ID"

for cid in $container_ids; do
    total_count=$((total_count + 1))

    info=$(docker inspect "$cid" 2>/dev/null) || continue

    name=$(echo "$info" | python3 -c "import sys,json; print(json.load(sys.stdin)[0]['Name'].lstrip('/'))" 2>/dev/null)
    image=$(echo "$info" | python3 -c "import sys,json; print(json.load(sys.stdin)[0]['Config']['Image'])" 2>/dev/null)
    status=$(echo "$info" | python3 -c "import sys,json; print(json.load(sys.stdin)[0]['State']['Status'])" 2>/dev/null)
    health=$(echo "$info" | python3 -c "
import sys,json
d=json.load(sys.stdin)[0]
h=d.get('State',{}).get('Health',{})
print(h.get('Status','') if h else '')
" 2>/dev/null || true)
    started_at=$(echo "$info" | python3 -c "import sys,json; print(json.load(sys.stdin)[0]['State']['StartedAt'])" 2>/dev/null)
    ip_data=$(echo "$info" | python3 -c "
import sys,json
d=json.load(sys.stdin)[0]
nets=d.get('NetworkSettings',{}).get('Networks',{})
out=' '.join(f'{k}:{v.get(\"IPAddress\",\"\")}' for k,v in nets.items() if v.get('IPAddress'))
print(out or '-')
" 2>/dev/null)
    port_data=$(echo "$info" | python3 -c "
import sys,json
d=json.load(sys.stdin)[0]
ports=d.get('NetworkSettings',{}).get('Ports',{}) or {}
parts=[]
for container_port, bindings in ports.items():
    if bindings:
        for b in bindings:
            hp=b.get('HostPort','')
            hi=b.get('HostIp','')
            if hi and hp:
                parts.append(f'{hi}:{hp}->{container_port}')
            elif hp:
                parts.append(f'{hp}->{container_port}')
            else:
                parts.append(container_port)
    else:
        parts.append(container_port)
print(', '.join(parts) if parts else '-')
" 2>/dev/null)

    [ "${#image}" -gt 35 ] && image="${image:0:32}..."

    if [ "$status" = "running" ]; then
        running_count=$((running_count + 1))
    fi

    if [ -n "$health" ]; then
        case "$health" in
            healthy)   healthy_count=$((healthy_count + 1)); status_display="${GREEN}${status} (${health})${RESET}" ;;
            unhealthy) unhealthy_count=$((unhealthy_count + 1)); status_display="${RED}${status} (${health})${RESET}" ;;
            *)         status_display="${YELLOW}${status} (${health})${RESET}" ;;
        esac
    else
        status_display="${YELLOW}${status}${RESET}"
    fi

    uptime="-"
    if start_ts=$(date -d "$started_at" +%s 2>/dev/null); then
        now_ts=$(date +%s)
        diff=$((now_ts - start_ts))
        days=$((diff / 86400))
        hours=$(((diff % 86400) / 3600))
        mins=$(((diff % 3600) / 60))
        if [ "$days" -gt 0 ]; then
            uptime="${days}d ${hours}h"
        elif [ "$hours" -gt 0 ]; then
            uptime="${hours}h ${mins}m"
        else
            uptime="${mins}m"
        fi
    fi

    printf "%-28s %-35s %-22b %-10s %-35s %-20s %s\n" \
        "$name" "$image" "$status_display" "$uptime" "$ip_data" "$port_data" "$cid"
done

echo
printf '%*s\n' 120 '' | tr ' ' '-'

echo "Containers : $total_count"
echo "Healthy    : $healthy_count"
echo "Unhealthy  : $unhealthy_count"
echo "Running    : $running_count"

if [ "$unhealthy_count" -gt 0 ]; then
    echo
    echo "${RED}Warning: unhealthy containers detected${RESET}"
fi