#!/bin/bash
# -----------------------------------------------------------------------------------------------
# --------------------------------- Critical Shares Full Sync ----------------------------------
# -----------------------------------------------------------------------------------------------
# Runs clean nightly sync for Emby and the auth stack (Critical-Data).
# Both require containers stopped for a consistent, safe state sync.
#
# Why this exists as a separate orchestrator from media_shares_sync.sh:
#   media_shares_sync.sh handles media shares — large, runs at 1am, no container stops needed
#   This script handles appdata that needs containers stopped for clean state:
#
#   Emby:
#     Hourly dirty sync runs continuously (containers up, WAL excluded)
#     Nightly clean sync stops Emby → syncs full clean state → restarts Emby
#     Ensures HOST2 has a fully consistent Emby database nightly
#
#   Critical-Data (auth stack):
#     NPM, Authelia, Mariadb-Authelia, Redis-Authelia, LLDAP
#     Containers stopped during sync — databases flush cleanly
#     HOST2 gets a clean auth state nightly
#     Users, groups, proxy rules, SSL certs all consistent
#     Adding a user on HOST1 → propagates to HOST2 overnight automatically
#
# Schedule: 2:30am daily — after media_shares_sync.sh (1am) finishes
# Container stop time is brief — Emby ~30s, auth stack ~15s
# Users experience a short Emby interruption at 2:30am — acceptable tradeoff
#
# For most users: this script ensures failover always has a clean working auth state
# without needing to think about dirty writes or WAL files.
#
# All configuration in Master.conf — rsync profiles handle container stops automatically.
# Supports --dry-run to walk through without stopping containers or syncing.
# -----------------------------------------------------------------------------------------------

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

source "$SCRIPT_DIR/../Master.conf"
source "$SCRIPT_DIR/../common.sh"

RSYNC_SCRIPT="$SCRIPT_DIR/../Rsync/rsync.sh"

parse_args "$@"

# -----------------------------------------------------------------------------------------------
# ━━━ $ICON_GEAR Setup ━━━
# -----------------------------------------------------------------------------------------------
echo ""
echo "━━━ $ICON_GEAR Setup ━━━"

if [[ "$EUID" -ne 0 ]]; then
    error "Must be run as root"
    exit 1
fi

success "Running as root"

acquire_lock

detect_hosts
resolve_remote_ip

# -----------------------------------------------------------------------------------------------
# ━━━ $ICON_SHIELD Pre-flight Checks ━━━
# -----------------------------------------------------------------------------------------------
echo ""
echo "━━━ $ICON_SHIELD Pre-flight Checks ━━━"

check_connectivity
check_remote_rootfs

# -----------------------------------------------------------------------------------------------
# Tracking
# -----------------------------------------------------------------------------------------------
PASS=()
FAIL=()
SHARE_TIMES=()
TOTAL_START=$(date +%s)

SYNC_JOBS=(
    "/mnt/user/Media_Server/Emby"
    "/mnt/user/appdata-Failover/Critical-Data"
)

SHARE_COUNT=${#SYNC_JOBS[@]}

# -----------------------------------------------------------------------------------------------
# ━━━ $ICON_SYNC Nightly Clean Sync ━━━
# -----------------------------------------------------------------------------------------------
echo ""
echo "━━━ $ICON_SYNC Nightly Clean Sync Starting — $(date '+%Y-%m-%d %H:%M:%S') ━━━"
echo "$ICON_SUMMARY Jobs: $SHARE_COUNT"
echo ""
[[ "$DRY_RUN" == true ]] && warn "DRY RUN — containers will not be stopped"

JOB_NUM=0
for JOB in "${SYNC_JOBS[@]}"; do
    ((JOB_NUM++))
    JOB_NAME=$(basename "$JOB")
    echo "━━━ [$JOB_NUM/$SHARE_COUNT] $JOB_NAME ━━━"

    JOB_START=$(date +%s)

    if [[ "$DRY_RUN" == true ]]; then
        bash "$RSYNC_SCRIPT" "$JOB" --dry-run
    else
        bash "$RSYNC_SCRIPT" "$JOB"
    fi

    EXIT_CODE=$?
    JOB_END=$(date +%s)
    JOB_DURATION=$(format_duration $(( JOB_END - JOB_START )))

    if [[ "$EXIT_CODE" -eq 0 ]]; then
        PASS+=("$JOB_NAME")
        success "$JOB_NAME — $ICON_SUCCESS done in $JOB_DURATION"
    else
        FAIL+=("$JOB_NAME")
        error "$JOB_NAME — $ICON_ERROR failed after $JOB_DURATION"
    fi

    echo ""
done

TOTAL_END=$(date +%s)
TOTAL_DURATION=$(format_duration $(( TOTAL_END - TOTAL_START )))

# -----------------------------------------------------------------------------------------------
# ━━━ $ICON_SUMMARY Summary ━━━
# -----------------------------------------------------------------------------------------------
echo "━━━━━ $ICON_SUMMARY NIGHTLY SYNC SUMMARY ━━━━━"
echo "$ICON_TIME Duration:  $TOTAL_DURATION"
echo "$ICON_SUCCESS Passed: ${#PASS[@]}  $ICON_ERROR Failed: ${#FAIL[@]}"
echo ""

if [[ ${#PASS[@]} -gt 0 ]]; then
    for job in "${PASS[@]}"; do echo "  $ICON_SUCCESS $job"; done
fi
if [[ ${#FAIL[@]} -gt 0 ]]; then
    for job in "${FAIL[@]}"; do echo "  $ICON_ERROR $job"; done
fi

echo ""

if [[ "$DRY_RUN" == true ]]; then
    echo "$ICON_WARN Status: DRY RUN — no changes made"
elif [[ ${#FAIL[@]} -eq 0 ]]; then
    echo "$ICON_DONE Status: $ICON_SUCCESS ALL JOBS COMPLETE"
    notify "Nightly sync complete on $(hostname) — Emby + auth stack synced cleanly" "Nightly Sync" "normal"
else
    echo "$ICON_ERROR Status: $ICON_ERROR ${#FAIL[@]} JOB(S) FAILED"
    notify "Nightly sync failed on $(hostname) — failed: ${FAIL[*]}" "Nightly Sync" "warning"
fi
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"