#!/bin/bash
# Vérifie l'état de tous les containers Docker et alerte sur Discord (salon homelab)
# si un container censé tourner (restart policy unless-stopped/always) est arrêté
# de façon anormale (code de sortie non-nul) ou en boucle de redémarrage.

set -uo pipefail

WEBHOOK_URL="https://discord.com/api/webhooks/1466011674371821599/KPvSSS53ot4cjICfDjJcn8s0So-oQaxBui4vpciyIz4e_yL3Fm6-7GQqeTaT3G6TLQmc"

problems=()

while IFS='|' read -r name state status; do
    if [ "$state" = "restarting" ]; then
        problems+=("🔴 **$name** en boucle de redémarrage ($status)")
        continue
    fi

    if [ "$state" = "exited" ] || [ "$state" = "dead" ]; then
        exit_code=$(docker inspect --format '{{.State.ExitCode}}' "$name" 2>/dev/null)
        restart_policy=$(docker inspect --format '{{.HostConfig.RestartPolicy.Name}}' "$name" 2>/dev/null)

        if [ "$exit_code" != "0" ] && { [ "$restart_policy" = "unless-stopped" ] || [ "$restart_policy" = "always" ]; }; then
            problems+=("🔴 **$name** arrêté anormalement (code $exit_code, $status)")
        fi
    fi
done < <(docker ps -a --format '{{.Names}}|{{.State}}|{{.Status}}')

if [ ${#problems[@]} -eq 0 ]; then
    echo "OK - tous les containers vont bien"
    exit 0
fi

message="⚠️ **Alerte containers Docker** (${#problems[@]})\n"
for p in "${problems[@]}"; do
    message+="$p\n"
done

json_payload=$(python3 -c "import json,sys; print(json.dumps({'content': sys.argv[1]}))" "$message")

curl -s -X POST "$WEBHOOK_URL" -H "Content-Type: application/json" -d "$json_payload" > /dev/null

echo "Alerte envoyée : ${#problems[@]} problème(s)"