#!/bin/bash
# ==============================================================================================
# =========================== Intermediate Sync Maintenance ====================================
# ==============================================================================================
# 4-hour orchestrator — arr library reconciliation, artwork fetching, and optional rsync.
# Schedule: 0 */4 * * * (every 4 hours)
#
# ── EXECUTION ORDER ───────────────────────────────────────────────────────────────────────────
#   1. arr_sync.sh                 — sync Lidarr/Sonarr/Radarr libraries across all nodes
#   2. Rsync window (optional)     — INTERMEDIATE_SYNC_SHARES, if any configured
#   3. INTERMEDIATE_MAINTENANCE_SCRIPTS — artwork fetch and any future 4-hour jobs
#
# ── WHY A SEPARATE ORCHESTRATOR ───────────────────────────────────────────────────────────────
# arr libraries need to converge more frequently than once a day. If a remote node adds
# something at 2am, the next daily window is 23 hours away — remote arrs search for content
# they don't know is already owned. Running every 4 hours closes that gap.
#
# lidarr_missing_art.sh is idempotent — skips existing files, runs fast after initial fill.
# Pairing it here means artwork catches up within 4 hours of a new album landing.
#
# Rsync is optional — INTERMEDIATE_SYNC_SHARES empty by default. Add shares to the config
# if a subset of data needs mid-day propagation (e.g. watch state, metadata). Full media
# share sync stays in the daily window.
#
# ── HOST AWARENESS ────────────────────────────────────────────────────────────────────────────
# detect_hosts() sets MY_ID and aliases HOST*_INTERMEDIATE_SYNC_SHARES → INTERMEDIATE_SYNC_SHARES.
# Each server can have a different set of mid-day shares — configure in host*.conf.
# Each script in INTERMEDIATE_MAINTENANCE_SCRIPTS handles its own host logic.
#
# ── DRIVE TEMP HANDLING ───────────────────────────────────────────────────────────────────────
# Same as daily_sync_maintenance.sh:
#   exit 1 = temp WARN — skip this share, continue to next
#   exit 2 = temp CRITICAL — abort ALL remaining syncs in this window
#
# ── SAFEGUARDS ────────────────────────────────────────────────────────────────────────────────
#   Root check           — scripts called here require root
#   acquire_lock         — prevents concurrent intermediate windows
#   check_connectivity   — verified before any rsync (skipped if no shares)
#   check_remote_rootfs  — aborts rsync if remote rootfs nearly full
#   Non-fatal jobs       — a failed arr_sync warns but does not block rsync or artwork fetch
#   Silent on success    — runs 4x/day, only failures warrant notification
#
# ── CONFIGURATION ─────────────────────────────────────────────────────────────────────────────
#   host*.conf:   HOST*_INTERMEDIATE_SYNC_SHARES — shares synced mid-day (empty = rsync skipped)
#   master.conf:         INTERMEDIATE_RSYNC_ENABLED     — enable/disable rsync section (default: true)
#   master.conf:         INTERMEDIATE_MAINTENANCE_SCRIPTS — jobs run after rsync
#   master.conf:         ARR_SYNC_ENABLED               — toggle inside arr_sync.sh
#
# ── USAGE ─────────────────────────────────────────────────────────────────────────────────────
#   intermediate_sync_maintenance.sh              — normal run
#   intermediate_sync_maintenance.sh --dry-run    — preview without changes
#   intermediate_sync_maintenance.sh --log        — verbose per-job output
#   intermediate_sync_maintenance.sh --status     — show configured shares/jobs and exit
# ==============================================================================================

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

source "$SCRIPT_DIR/../load_config.sh"

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

parse_args "$@"

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

validate_unraid_cmd \
    "/usr/local/emhttp/plugins/dynamix/scripts/notify" \
    "" "" \
    "unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"

acquire_lock

detect_hosts
resolve_remote_ip

[[ "$DRY_RUN" == true ]] && warn "DRY RUN — no changes will be made"

# ── Helper — run a maintenance job, track pass/fail ───────────────────────────────────────────
run_job() {
    local script_entry="$1"
    local extra_dry=""
    [[ "$DRY_RUN" == true ]] && extra_dry="--dry-run"

    read -r -a script_args <<< "$script_entry"
    local script_path="$SCRIPTS_ROOT/${script_args[0]}"
    local script_name
    script_name=$(basename "${script_args[0]}")
    local extra_args=("${script_args[@]:1}")

    if [[ ! -f "$script_path" ]]; then
        error "$script_name — not found at $script_path"
        JOB_FAIL+=("$script_name")
        return 1
    fi

    log "Running: $script_name ${extra_args[*]}"
    # shellcheck disable=SC2086
    if bash "$script_path" "${extra_args[@]}" $extra_dry; then
        log "$script_name — done ✅"
        JOB_PASS+=("$script_name ${extra_args[*]}")
    else
        warn "$script_name — failed (exit $?)"
        JOB_FAIL+=("$script_name ${extra_args[*]}")
    fi
}

# ==============================================================================================
# ━━━ Status ━━━
# ==============================================================================================
if [[ "$SHOW_STATUS" == true ]]; then
    echo ""
    echo "━━━━━ $ICON_SUMMARY INTERMEDIATE SYNC STATUS ━━━━━"
    echo "$ICON_HOST   Identity:        $MY_ID ($LOCAL_SERVER_NAME)"
    echo "$ICON_NET    Remote:          $REMOTE_ID ($REMOTE_SERVER_NAME)"
    echo "$ICON_SYNC   Rsync enabled:   ${RSYNC_ENABLED:-true}"
    echo "$ICON_SYNC   Interm. enabled: ${INTERMEDIATE_RSYNC_ENABLED:-true}"
    echo "$ICON_GEAR   Arr sync:        ${ARR_SYNC_ENABLED:-true}"
    echo ""
    echo "━━━ Intermediate Sync Shares ━━━"
    if [[ ${#INTERMEDIATE_SYNC_SHARES[@]} -eq 0 ]]; then
        echo "  None configured — add to INTERMEDIATE_SYNC_SHARES in master.conf to enable"
    else
        for share in "${INTERMEDIATE_SYNC_SHARES[@]}"; do
            [[ -n "$share" ]] && echo "  $ICON_SYNC $(basename "$share") ($share)"
        done
    fi
    echo ""
    echo "━━━ Intermediate Maintenance Scripts ━━━"
    if [[ ${#INTERMEDIATE_MAINTENANCE_SCRIPTS[@]} -eq 0 ]]; then
        echo "  None configured"
    else
        for entry in "${INTERMEDIATE_MAINTENANCE_SCRIPTS[@]}"; do
            [[ -n "$entry" ]] && echo "  $ICON_GEAR ${entry##*/}"
        done
    fi
    echo "━━━━━━━━━━━━━━━━━━━━━━━"
    exit 0
fi

WINDOW_START=$(date +%s)
JOB_PASS=()
JOB_FAIL=()
PASS=()
FAIL=()
SHARE_TIMES=()

echo ""
echo "━━━ $ICON_GEAR Intermediate Sync — $MY_ID — $(date '+%Y-%m-%d %H:%M:%S') ━━━"

# ==============================================================================================
# ━━━ Arr Sync ━━━
# ==============================================================================================
echo ""
echo "━━━ $ICON_SYNC Arr Sync ━━━"

ARR_SYNC_SCRIPT="$SCRIPTS_ROOT/Media/arr_sync.sh"
if [[ "${ARR_SYNC_ENABLED:-true}" != "true" ]]; then
    echo "ARR_SYNC_ENABLED=false — skipping"
elif [[ ! -f "$ARR_SYNC_SCRIPT" ]]; then
    warn "arr_sync.sh not found at $ARR_SYNC_SCRIPT — skipping"
    JOB_FAIL+=("arr_sync.sh")
else
    _arr_sync_args=()
    [[ "$DRY_RUN" == true ]] && _arr_sync_args+=("--dry-run")
    if bash "$ARR_SYNC_SCRIPT" "${_arr_sync_args[@]}"; then
        echo "Arr sync complete ✅"
        JOB_PASS+=("arr_sync.sh")
    else
        warn "Arr sync completed with errors — continuing"
        JOB_FAIL+=("arr_sync.sh")
    fi
    unset _arr_sync_args
fi

# ==============================================================================================
# ━━━ Rsync (optional) ━━━
# ==============================================================================================
SHARE_COUNT=${#INTERMEDIATE_SYNC_SHARES[@]}

echo ""
echo "━━━ $ICON_SYNC Mid-day Share Sync — $SHARE_COUNT share(s) ━━━"

TOTAL_START=$(date +%s)
SHARE_INDEX=0
ABORT_ALL_SYNCS=false

if [[ "$SHARE_COUNT" -eq 0 ]]; then
    echo "No INTERMEDIATE_SYNC_SHARES configured — skipping"
    echo "Add shares to INTERMEDIATE_SYNC_SHARES in master.conf to enable mid-day sync"
elif ! check_rsync_enabled "INTERMEDIATE"; then
    warn "Intermediate rsync disabled — skipping all $SHARE_COUNT share sync(s)"
else
    check_connectivity
    check_remote_rootfs

    RSYNC_DRY=""
    [[ "$DRY_RUN" == true ]] && RSYNC_DRY="--dry-run"

    for SHARE in "${INTERMEDIATE_SYNC_SHARES[@]}"; do
        (( SHARE_INDEX++ ))
        SHARE_NAME=$(basename "$SHARE")
        SHARE_START=$(date +%s)

        echo ""
        echo "━━━ $ICON_SYNC Share $SHARE_INDEX/$SHARE_COUNT: $SHARE_NAME ━━━"

        if [[ "$ABORT_ALL_SYNCS" == true ]]; then
            warn "$SHARE_NAME — skipped (drive temps CRITICAL earlier in window)"
            FAIL+=("$SHARE_NAME:temp-critical")
            continue
        fi

        bash "$RSYNC_SCRIPT" "$SHARE" $RSYNC_DRY
        RSYNC_EXIT=$?

        SHARE_TIMES+=("$SHARE_NAME:$(( $(date +%s) - SHARE_START ))")

        case "$RSYNC_EXIT" in
            0)
                PASS+=("$SHARE_NAME")
                log "$SHARE_NAME — done ✅"
                ;;
            1)
                FAIL+=("$SHARE_NAME:temp-warn")
                warn "$SHARE_NAME skipped — drive temps too high"
                ;;
            2)
                FAIL+=("$SHARE_NAME:temp-critical")
                ABORT_ALL_SYNCS=true
                error "$SHARE_NAME aborted — drive temps CRITICAL, stopping all remaining syncs"
                notify "Intermediate sync aborted on $(hostname) ($MY_ID) — drive temps CRITICAL during $SHARE_NAME" \
                    "Intermediate Sync" "warning"
                ;;
            *)
                FAIL+=("$SHARE_NAME")
                error "$SHARE_NAME failed (exit $RSYNC_EXIT) — continuing to next share"
                ;;
        esac
    done
fi

TOTAL_END=$(date +%s)

# ==============================================================================================
# ━━━ Maintenance Jobs ━━━
# ==============================================================================================
if [[ ${#INTERMEDIATE_MAINTENANCE_SCRIPTS[@]} -gt 0 ]]; then
    echo ""
    echo "━━━ $ICON_GEAR Maintenance Jobs ━━━"
    for script_entry in "${INTERMEDIATE_MAINTENANCE_SCRIPTS[@]}"; do
        [[ -z "$script_entry" ]] && continue
        echo ""
        run_job "$script_entry"
    done
fi

WINDOW_END=$(date +%s)

# ==============================================================================================
# ━━━ Summary ━━━
# ==============================================================================================
echo ""
echo "━━━━━ $ICON_SUMMARY INTERMEDIATE SYNC SUMMARY ━━━━━"
echo "$ICON_HOST   Identity: $MY_ID ($LOCAL_SERVER_NAME)"
echo "$ICON_TIME   Window:   $(date -d @"$WINDOW_START" '+%Y-%m-%d %H:%M:%S') → $(date -d @"$WINDOW_END" '+%H:%M:%S')"
echo "$ICON_TIME   Duration: $(format_duration $(( WINDOW_END - WINDOW_START )))"
echo ""

if [[ "$SHARE_COUNT" -gt 0 ]]; then
    echo "$ICON_SYNC  Shares ($SHARE_COUNT):"
    for entry in "${SHARE_TIMES[@]}"; do
        sname="${entry%%:*}"
        sdur="${entry##*:}"
        if printf '%s\n' "${FAIL[@]}" | grep -q "^${sname}"; then
            echo "  $ICON_ERROR $sname — $(format_duration "$sdur")"
        else
            echo "  $ICON_DONE  $sname — $(format_duration "$sdur")"
        fi
    done
    echo "  Passed: ${#PASS[@]}/$SHARE_COUNT  Failed: ${#FAIL[@]}/$SHARE_COUNT"
    echo ""
fi

if [[ ${#JOB_PASS[@]} -gt 0 || ${#JOB_FAIL[@]} -gt 0 ]]; then
    echo "$ICON_GEAR  Jobs:"
    for job in "${JOB_PASS[@]}"; do echo "  $ICON_DONE  $job"; done
    for job in "${JOB_FAIL[@]}"; do echo "  $ICON_ERROR $job"; done
    echo ""
fi

TOTAL_FAIL=$(( ${#FAIL[@]} + ${#JOB_FAIL[@]} ))

if [[ "$DRY_RUN" == true ]]; then
    warn "DRY RUN — no changes made"
elif [[ "$TOTAL_FAIL" -eq 0 ]]; then
    echo "$ICON_DONE Status: all complete ✅ — ${#JOB_PASS[@]} job(s) run, ${#PASS[@]}/$SHARE_COUNT share(s) synced"
else
    warn "Status: $TOTAL_FAIL failure(s)"
    notify "Intermediate sync failed on $(hostname) ($MY_ID) — shares: ${#FAIL[@]}/$SHARE_COUNT failed, jobs: ${#JOB_FAIL[@]} failed" \
        "Intermediate Sync" "warning"
fi
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

[[ "$TOTAL_FAIL" -gt 0 ]] && exit 1
exit 0