#!/usr/bin/env bash
set -euo pipefail

# =============================================================================
# setup/unraid.sh — Install prerequisites on Unraid (runs via SSH from MacBook)
# =============================================================================

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
# shellcheck source=../lib/common.sh
# shellcheck disable=SC1091
source "${SCRIPT_DIR}/../lib/common.sh"

load_env
require_vars UNRAID_IP UNRAID_SSH_USER UNRAID_GITEA_DATA_PATH

log_info "=== Unraid Setup ==="

# --------------------------------------------------------------------------
# OS check — Unraid must be Linux (Docker, static binaries, x86_64)
# --------------------------------------------------------------------------
log_info "Verifying Unraid OS..."
require_remote_os "UNRAID" "Linux" "Unraid must be a Linux machine — check UNRAID_IP in .env"

# --------------------------------------------------------------------------
# Manifest — track what we install for rollback/cleanup
# --------------------------------------------------------------------------
manifest_init "unraid"

# --------------------------------------------------------------------------
# SSH connectivity
# --------------------------------------------------------------------------
log_info "Testing SSH to Unraid..."
if ! ssh_check UNRAID; then
  log_error "Cannot SSH to Unraid at $UNRAID_IP as $UNRAID_SSH_USER"
  exit 1
fi
log_success "SSH to Unraid OK"

# --------------------------------------------------------------------------
# Docker (pre-installed on Unraid — DO NOT attempt to install)
# --------------------------------------------------------------------------
if ssh_exec UNRAID "docker --version" &>/dev/null; then
  log_success "Docker found on Unraid"
else
  log_error "Docker not found on Unraid."
  log_error "Enable Docker via Unraid's Settings > Docker page."
  log_error "This script does not install Docker on Unraid."
  exit 1
fi

# --------------------------------------------------------------------------
# docker-compose (try plugin first, then standalone)
# --------------------------------------------------------------------------
if ssh_exec UNRAID "docker compose version" &>/dev/null; then
  log_success "docker compose (plugin) found on Unraid"
elif ssh_exec UNRAID "docker-compose --version" &>/dev/null; then
  log_success "docker-compose (standalone) found on Unraid"
else
  log_info "Installing docker-compose standalone binary on Unraid..."
  COMPOSE_VERSION="v2.29.1"
  ssh_exec UNRAID "curl -SL https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-linux-x86_64 -o /usr/local/bin/docker-compose && chmod +x /usr/local/bin/docker-compose"
  manifest_record "unraid" "static_bin" "/usr/local/bin/docker-compose"
  if ssh_exec UNRAID "docker-compose --version" &>/dev/null; then
    log_success "docker-compose installed on Unraid"
  else
    log_error "Failed to install docker-compose on Unraid"
    exit 1
  fi
fi

# --------------------------------------------------------------------------
# jq (install via static binary — Unraid has no package manager)
# --------------------------------------------------------------------------
if ssh_exec UNRAID "jq --version" &>/dev/null; then
  log_success "jq found on Unraid"
else
  log_info "Installing jq static binary on Unraid..."
  JQ_VERSION="1.7.1"
  ssh_exec UNRAID "curl -SL https://github.com/jqlang/jq/releases/download/jq-${JQ_VERSION}/jq-linux-amd64 -o /usr/local/bin/jq && chmod +x /usr/local/bin/jq"
  manifest_record "unraid" "static_bin" "/usr/local/bin/jq"
  if ssh_exec UNRAID "jq --version" &>/dev/null; then
    log_success "jq installed on Unraid"
  else
    log_error "Failed to install jq on Unraid"
    exit 1
  fi
fi

# --------------------------------------------------------------------------
# unzip (needed by backup/restore scripts)
# --------------------------------------------------------------------------
if ssh_exec UNRAID "unzip -v" &>/dev/null; then
  log_success "unzip found on Unraid"
else
  log_info "Installing unzip static binary on Unraid..."
  ssh_exec UNRAID "curl -SL https://busybox.net/downloads/binaries/1.35.0-x86_64-linux-musl/busybox -o /tmp/busybox_unzip && chmod +x /tmp/busybox_unzip && cp /tmp/busybox_unzip /usr/local/bin/unzip && rm /tmp/busybox_unzip"
  manifest_record "unraid" "static_bin" "/usr/local/bin/unzip"
  if ssh_exec UNRAID "unzip -v" &>/dev/null; then
    log_success "unzip installed on Unraid"
  else
    log_warn "Failed to install unzip on Unraid — backup/restore may not work"
  fi
fi

# --------------------------------------------------------------------------
# Minimum version checks for remote tools
# --------------------------------------------------------------------------
log_info "Checking minimum versions on Unraid..."
check_remote_min_version "UNRAID" "docker"         "docker --version"         "20.0"
check_remote_min_version "UNRAID" "docker-compose"  "docker compose version 2>/dev/null || docker-compose --version" "2.0"
check_remote_min_version "UNRAID" "jq"             "jq --version"             "1.6"

# --------------------------------------------------------------------------
# Data path
# --------------------------------------------------------------------------
log_info "Verifying data path: $UNRAID_GITEA_DATA_PATH"
if ssh_exec UNRAID "mkdir -p '$UNRAID_GITEA_DATA_PATH' && touch '$UNRAID_GITEA_DATA_PATH/.write-test' && rm '$UNRAID_GITEA_DATA_PATH/.write-test'"; then
  log_success "Data path exists and is writable"
else
  log_error "Cannot write to $UNRAID_GITEA_DATA_PATH on Unraid"
  exit 1
fi

# --------------------------------------------------------------------------
# Summary
# --------------------------------------------------------------------------
log_success "All Unraid prerequisites satisfied"