#!/usr/bin/env bash
set -euo pipefail
IFS=$'\n\t'

log() { echo "[$(date +'%F %T')] $*"; }
die() { log "ERROR: $*"; exit 1; }
need_cmd() { command -v "$1" >/dev/null 2>&1; }

missing=()
if ! need_cmd 7z; then
  missing+=("7z")
fi
if ! need_cmd curl && ! need_cmd wget; then
  missing+=("curl/wget")
fi
if ! need_cmd rsync; then
  missing+=("rsync")
fi
if ! need_cmd jq; then
  missing+=("jq")
fi
if ! need_cmd java; then
  missing+=("java")
fi

if [ "${#missing[@]}" -eq 0 ]; then
  log "All dependencies already satisfied."
  exit 0
fi

log "Missing dependencies detected: ${missing[*]}"

SUDO=""
if [ "$(id -u)" -ne 0 ]; then
  if need_cmd sudo; then
    SUDO="sudo"
  else
    die "Root privileges are required to install dependencies (sudo not found)."
  fi
fi

if need_cmd apt-get; then
  ${SUDO} apt-get update
  ${SUDO} apt-get install -y curl wget jq rsync p7zip-full python3
  log "Installing Java runtime (trying OpenJDK 11, 17, then default-jre)..."
  if ! ${SUDO} apt-get install -y openjdk-11-jre-headless; then
    if ! ${SUDO} apt-get install -y openjdk-17-jre-headless; then
      if ! ${SUDO} apt-get install -y default-jre-headless; then
        ${SUDO} apt-get install -y default-jre
      fi
    fi
  fi
elif need_cmd apt; then
  ${SUDO} apt update
  ${SUDO} apt install -y curl wget jq rsync p7zip-full python3
  log "Installing Java runtime (trying OpenJDK 11, 17, then default-jre)..."
  if ! ${SUDO} apt install -y openjdk-11-jre-headless; then
    if ! ${SUDO} apt install -y openjdk-17-jre-headless; then
      if ! ${SUDO} apt install -y default-jre-headless; then
        ${SUDO} apt install -y default-jre
      fi
    fi
  fi
elif need_cmd dnf; then
  ${SUDO} dnf install -y curl wget jq rsync p7zip p7zip-plugins python3 java-11-openjdk-headless
elif need_cmd yum; then
  ${SUDO} yum install -y curl wget jq rsync p7zip p7zip-plugins python3 java-11-openjdk-headless
elif need_cmd pacman; then
  ${SUDO} pacman -Sy --noconfirm curl wget jq rsync p7zip python jre11-openjdk
elif need_cmd apk; then
  ${SUDO} apk add --no-cache curl wget jq rsync p7zip python3 openjdk11-jre
elif need_cmd zypper; then
  ${SUDO} zypper install -y curl wget jq rsync p7zip python3 java-11-openjdk
else
  die "No supported package manager found. Please install curl/wget, 7z, rsync, jq, and Java manually."
fi

if ! need_cmd 7z || ( ! need_cmd curl && ! need_cmd wget ) || ! need_cmd rsync || ! need_cmd jq || ! need_cmd java; then
  die "Dependencies are still missing after install attempt. Please install manually."
fi

log "Dependencies installed successfully."