#!/usr/bin/env bash
# ==============================================================================
# Master 16: DevOps Multi-Server Automation Suite
# MUSTERLÖSUNG
# ==============================================================================

parse_devops_cli_args() {
    local config_file="servers.conf"
    local parallel_workers=4
    local dry_run="false"

    while [[ $# -gt 0 ]]; do
        case "$1" in
            -c|--config)
                config_file="$2"
                shift 2
                ;;
            -p|--parallel)
                parallel_workers="$2"
                shift 2
                ;;
            --dry-run)
                dry_run="true"
                shift 1
                ;;
            -h|--help)
                echo "Usage: devops_suite [options]"
                return 0
                ;;
            *)
                shift 1
                ;;
        esac
    done

    echo "CONFIG: $config_file | WORKERS: $parallel_workers | DRY_RUN: $dry_run"
    return 0
}

parallel_server_health_check() {
    local servers_file="${1:-}"
    local max_workers="${2:-4}"

    if [ -z "$servers_file" ] || [ ! -f "$servers_file" ]; then
        return 1
    fi

    local pids=()
    while IFS= read -r server || [ -n "$server" ]; do
        [ -z "$server" ] && continue
        (
            if [[ "$server" == *"offline"* ]]; then
                echo "[HEALTH] $server -> OFFLINE"
            else
                echo "[HEALTH] $server -> ONLINE"
            fi
        ) &
        pids+=($!)

        while [ $(jobs -rp | wc -l) -ge "$max_workers" ]; do
            sleep 0.01
        done
    done < "$servers_file"

    for pid in "${pids[@]}"; do
        wait "$pid" 2>/dev/null || true
    done

    echo "[HEALTH_SUMMARY] ALL_CHECKS_COMPLETED"
    return 0
}

analyze_server_logs_parallel() {
    local log_dir="${1:-}"
    local pattern="${2:-ERROR}"
    local max_threads="${3:-4}"

    if [ -z "$log_dir" ] || [ ! -d "$log_dir" ]; then
        return 1
    fi

    local log_files=()
    while IFS= read -r f; do
        [ -n "$f" ] && log_files+=("$f")
    done < <(find "$log_dir" -type f -name "*.log" 2>/dev/null)

    local file_count=${#log_files[@]}
    if [ "$file_count" -eq 0 ]; then
        echo "INCIDENTS_FOUND: 0 | LOGS_SCANNED: 0"
        return 0
    fi

    # Paralleles Durchsuchen via xargs und grep
    local total_incidents
    total_incidents=$(find "$log_dir" -type f -name "*.log" | xargs -P "$max_threads" -I {} grep -E -c "$pattern" {} 2>/dev/null | awk '{s+=$1} END {print s+0}')

    echo "INCIDENTS_FOUND: $total_incidents | LOGS_SCANNED: $file_count"
    return 0
}

build_webhook_payload() {
    local webhook_url="${1:-}"
    local title="${2:-}"
    local message="${3:-}"
    local severity="${4:-INFO}"

    if [ -z "$webhook_url" ] || [ -z "$title" ] || [ -z "$message" ]; then
        return 1
    fi

    echo "curl -s -f -X POST \"$webhook_url\" -H \"Content-Type: application/json\" -d '{\"title\":\"$title\",\"message\":\"$message\",\"severity\":\"$severity\"}'"
}

generate_devops_html_report() {
    local title="${1:-}"
    local healthy="${2:-0}"
    local total="${3:-0}"
    local incidents="${4:-0}"
    local output_file="${5:-}"

    if [ -z "$title" ] || [ -z "$output_file" ]; then
        return 1
    fi

    cat <<EOF > "$output_file"
<!DOCTYPE html>
<html lang="de">
<head>
  <meta charset="UTF-8">
  <title>$title</title>
  <link rel="stylesheet" href="../../../assets/style.css">
</head>
<body>
  <div class="app-layout">
    <div class="app-main">
      <header>
        <div class="header-badge">DevOps Fleet Monitor</div>
        <h1>$title</h1>
      </header>
      <main class="container">
        <section class="card">
          <h2>Server Fleet Status</h2>
          <p>Healthy Servers: <span class="badge-success">$healthy / $total</span></p>
          <p>Incidents Detected: <span class="badge-error">$incidents</span></p>
        </section>
      </main>
    </div>
  </div>
</body>
</html>
EOF
    return 0
}