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

########################################
# Usage / 參數
# $1: ENVIRONMENT (test|live)
# $2: FILE_NAME
# $3: MODULE (exec_merge|generate|dbcheck|prebackup|merge|logcheck|waitdone|postbackup|check|update_db_setup|move_old_server_directory|removebackup|after_merge|end_merge|remove_source_wids_on_hosts)
########################################
if [ "$#" -lt 2 ] || [ "$#" -gt 3 ]; then
    echo "Usage: $0 <ENVIRONMENT: test|live> <FILE_NAME> [MODULE]" >&2
    echo "MODULE: exec_merge | generate | dbcheck | prebackup | merge | logcheck | waitdone | postbackup | check | update_db_setup | move_old_server_directory | removebackup | after_merge | end_merge | remove_source_wids_on_hosts" >&2
    exit 1
fi

ENVIRONMENT="$1"
FILE_NAME="$2"
MODULE="${3:-exec_merge}"

case "$ENVIRONMENT" in
    test|live)
        ;;
    *)
        echo "Error: ENVIRONMENT must be 'test' or 'live', got '$ENVIRONMENT'." >&2
        exit 1
        ;;
esac

INPUT_FILE="$HOME/bin/merge_n1/${ENVIRONMENT}/${FILE_NAME}"

if [ ! -f "$INPUT_FILE" ]; then
    echo "Error: input file not found: $INPUT_FILE" >&2
    exit 1
fi

if [ ! -s "$INPUT_FILE" ]; then
    echo "Error: input file is empty: $INPUT_FILE" >&2
    exit 1
fi

########################################
# 記錄開始執行時間
########################################
START_TS=$(date +%s)
START_TIME=$(date '+%Y-%m-%d %H:%M:%S')
echo "== run_merge_n1 start at ${START_TIME} (ENV=${ENVIRONMENT}, FILE_NAME=${FILE_NAME}, MODULE=${MODULE}) =="

########################################
# 資料結構宣告
########################################
declare -A list_worlds      # list_worlds[LID]  = "1101 1107 1108"
declare -A list_setid       # list_setid[LID]   = 11
declare -A set_lists        # set_lists[11]     = "L1 L2"
declare -A set_first_list   # set_first_list[11]= "L1"
declare -a all_lists        # all LID, in file order

########################################
# 讀取檔案，建立結構 & 檢查每行 SET_ID 一致性
########################################
LINE_NO=0

while IFS= read -r line || [ -n "$line" ]; do
    LINE_NO=$((LINE_NO + 1))

    # trim
    line_trimmed="${line#"${line%%[![:space:]]*}"}"
    line_trimmed="${line_trimmed%"${line_trimmed##*[![:space:]]}"}"

    # 跳過空行或註解行
    if [ -z "$line_trimmed" ] || [[ "$line_trimmed" =~ ^# ]]; then
        continue
    fi

    read -r -a WORLDS <<< "$line_trimmed"

    if [ "${#WORLDS[@]}" -lt 1 ]; then
        echo "Error: line $LINE_NO has no WorldID: '$line'" >&2
        exit 1
    fi

    LINE_SET_ID=""

    for wid in "${WORLDS[@]}"; do
        if ! [[ "$wid" =~ ^[0-9]+$ ]]; then
            echo "Error: line $LINE_NO has non-numeric WorldID '$wid'." >&2
            exit 1
        fi

        wid_set_id=$(( wid / 100 ))
        if [ -z "$LINE_SET_ID" ]; then
            LINE_SET_ID="$wid_set_id"
        else
            if (( wid_set_id != LINE_SET_ID )); then
                echo "Error: line $LINE_NO has mixed SET_ID: expected $LINE_SET_ID, got $wid_set_id (WorldID: $wid)." >&2
                exit 1
            fi
        fi
    done

    LID="L${LINE_NO}"
    list_worlds["$LID"]="$line_trimmed"
    list_setid["$LID"]="$LINE_SET_ID"
    all_lists+=( "$LID" )

    if [[ -z "${set_lists[$LINE_SET_ID]+x}" ]]; then
        set_lists["$LINE_SET_ID"]="$LID"
        set_first_list["$LINE_SET_ID"]="$LID"
    else
        set_lists["$LINE_SET_ID"]+=" $LID"
    fi

done < "$INPUT_FILE"

if [ "${#all_lists[@]}" -eq 0 ]; then
    echo "Error: no valid WorldID lists found in file: $INPUT_FILE" >&2
    exit 1
fi

########################################
# SHOW 結構（方便除錯）
########################################
echo "Input file      : $INPUT_FILE"
echo "Environment     : $ENVIRONMENT"
echo "FILE_NAME       : $FILE_NAME"
echo "Lists by SET_ID :"
for set_id in "${!set_lists[@]}"; do
    echo "  SET_ID $set_id => ${set_lists[$set_id]}"
done
echo

########################################
# 全域輔助變數（第一個 List）
########################################
FIRST_LID_GLOBAL="${all_lists[0]}"
FIRST_SETID_GLOBAL="${list_setid[$FIRST_LID_GLOBAL]}"

########################################
# 工具函式：依 SET_ID + ENV 取得 AREA / MACHINE / GENERATOR
########################################
get_area_machine_and_generator() {
    local env="$1"
    local sid="$2"
    local area=""
    local machine=""
    local generator=""

    if (( sid >= 10 && sid < 20 )); then
        area="asia"
    elif (( sid >= 20 && sid < 30 )); then
        area="us"
    elif (( sid >= 30 && sid < 40 )); then
        area="eu"
    else
        echo "Error: unsupported SET_ID '$sid' (only 10~39 supported)." >&2
        return 1
    fi

    if [ "$env" = "live" ]; then
        machine="MS${sid}"
        generator="generate_merge_preparation"
    else
        case "$area" in
            asia) machine="MERGE_ASIA" ;;
            us)   machine="MERGE_US" ;;
            eu)   machine="MERGE_EU" ;;
        esac
        generator="generate_merge_preparation_test"
    fi

    printf '%s %s %s\n' "$area" "$machine" "$generator"
}

WAIT_INTERVAL=60   # waitdone 模組每次檢查間隔秒數

########################################
# 模組：產生合併目錄與檔案
########################################
run_generate() {
    echo ">>> MODULE: generate (create merge directories and files)"
    for set_id in "${!set_lists[@]}"; do
        read AREA MACHINE GENERATOR < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"

        read -r -a LIDS <<< "${set_lists[$set_id]}"

        echo "==== SET_ID ${set_id} / AREA=${AREA} / MACHINE=${MACHINE} / GEN=${GENERATOR} ===="

        for lid in "${LIDS[@]}"; do
            WORLD_ID_LISTS="${list_worlds[$lid]}"
            echo "[${GENERATOR}] $MACHINE $DIRECTORY_NAME :: $WORLD_ID_LISTS"
            ssh "$MACHINE" "\$HOME/bin/${GENERATOR} ${DIRECTORY_NAME} ${WORLD_ID_LISTS}"
        done
    done
    echo
}

########################################
# 模組：檢查 DB 連線
########################################
run_db_connect_verify() {
    echo ">>> MODULE: dbcheck (merge_db_connect_verify)"
    for set_id in "${!set_lists[@]}"; do
        read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"

        read -r -a LIDS <<< "${set_lists[$set_id]}"

        for lid in "${LIDS[@]}"; do
            WORLD_ID_LISTS="${list_worlds[$lid]}"
            WORLD_ID_LISTS_STR=${WORLD_ID_LISTS// /_}
            REMOTE_BASE_DIR="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR}"
            REMOTE_MERGE_INI="${REMOTE_BASE_DIR}/merge_setup.ini"

            echo "[merge_db_connect_verify] $MACHINE $REMOTE_MERGE_INI"
            ssh "$MACHINE" "\$HOME/bin/merge_db_connect_verify \"${REMOTE_MERGE_INI}\""
        done
    done
    echo
}

########################################
# 模組：Pre DB Backup
########################################
run_pre_backup() {
    echo ">>> MODULE: prebackup (Pre DB backup: AccountDB / GameDB / WorldDB)"

    # a. 第一個 List (global) - AccountDB
    local WORLD_ID_LISTS_FIRST_GLOBAL WORLD_ID_LISTS_STR_FIRST_GLOBAL
    read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$FIRST_SETID_GLOBAL")
    DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
    WORLD_ID_LISTS_FIRST_GLOBAL="${list_worlds[$FIRST_LID_GLOBAL]}"
    WORLD_ID_LISTS_STR_FIRST_GLOBAL=${WORLD_ID_LISTS_FIRST_GLOBAL// /_}
    REMOTE_BASE_DIR_FIRST_GLOBAL="\$HOME/servers${FIRST_SETID_GLOBAL}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR_FIRST_GLOBAL}"
    REMOTE_MERGE_INI_FIRST_GLOBAL="${REMOTE_BASE_DIR_FIRST_GLOBAL}/merge_setup.ini"

    echo "[Pre-AccountDB] First global list: $FIRST_LID_GLOBAL ($WORLD_ID_LISTS_FIRST_GLOBAL) on $MACHINE"
    ssh "$MACHINE" "\$HOME/bin/merge_db_backup \"${REMOTE_MERGE_INI_FIRST_GLOBAL}\" _${FILE_NAME}_Pre AccountDB"

    # b. 每個 SetID 下的第一個 List - GameDB
    for set_id in "${!set_first_list[@]}"; do
        local FIRST_LID="${set_first_list[$set_id]}"
        read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
        local WORLD_ID_LISTS_FIRST_SET WORLD_ID_LISTS_STR_FIRST_SET
        WORLD_ID_LISTS_FIRST_SET="${list_worlds[$FIRST_LID]}"
        WORLD_ID_LISTS_STR_FIRST_SET=${WORLD_ID_LISTS_FIRST_SET// /_}
        REMOTE_BASE_DIR_FIRST_SET="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR_FIRST_SET}"
        REMOTE_MERGE_INI_FIRST_SET="${REMOTE_BASE_DIR_FIRST_SET}/merge_setup.ini"

        echo "[Pre-GameDB] SET_ID=${set_id} first list: $FIRST_LID ($WORLD_ID_LISTS_FIRST_SET) on $MACHINE"
        ssh "$MACHINE" "\$HOME/bin/merge_db_backup \"${REMOTE_MERGE_INI_FIRST_SET}\" _${FILE_NAME}_Pre GameDB"
    done

    # c. 每個 List - WorldDB
    for lid in "${all_lists[@]}"; do
        local set_id="${list_setid[$lid]}"
        read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
        local WORLD_ID_LISTS WORLD_ID_LISTS_STR
        WORLD_ID_LISTS="${list_worlds[$lid]}"
        WORLD_ID_LISTS_STR=${WORLD_ID_LISTS// /_}
        REMOTE_BASE_DIR="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR}"
        REMOTE_MERGE_INI="${REMOTE_BASE_DIR}/merge_setup.ini"

        echo "[Pre-WorldDB] LID=${lid}, SET_ID=${set_id} ($WORLD_ID_LISTS) on $MACHINE"
        ssh "$MACHINE" "\$HOME/bin/merge_db_backup \"${REMOTE_MERGE_INI}\" _${FILE_NAME}_Pre WorldDB"
    done
    echo
}

########################################
# 模組：執行合併作業 (merge_exec)
########################################
run_merge_exec() {
    echo ">>> MODULE: merge (run merge_exec)"
    for lid in "${all_lists[@]}"; do
        local set_id="${list_setid[$lid]}"
        read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
        local WORLD_ID_LISTS WORLD_ID_LISTS_STR
        WORLD_ID_LISTS="${list_worlds[$lid]}"
        WORLD_ID_LISTS_STR=${WORLD_ID_LISTS// /_}
        REMOTE_BASE_DIR="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR}"

        echo "[merge_exec] LID=${lid}, SET_ID=${set_id} ($WORLD_ID_LISTS) on $MACHINE"
        ssh "$MACHINE" "cd ${REMOTE_BASE_DIR}; nohup ./merge_exec &"
    done
    echo
}

########################################
# 模組：初次檢查 Server log
########################################
run_log_check() {
    echo ">>> MODULE: logcheck (first grep on Test.log*)"
    echo "==== [LOG CHECK - FIRST GREP] ===="
    for lid in "${all_lists[@]}"; do
        local set_id="${list_setid[$lid]}"
        read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
        local WORLD_ID_LISTS WORLD_ID_LISTS_STR
        WORLD_ID_LISTS="${list_worlds[$lid]}"
        WORLD_ID_LISTS_STR=${WORLD_ID_LISTS// /_}
        REMOTE_BASE_DIR="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR}"

        echo "[log check] LID=${lid}, SET_ID=${set_id} ($WORLD_ID_LISTS) on $MACHINE"
        ssh "$MACHINE" "cd ${REMOTE_BASE_DIR}; grep -E ',WolrdDB|,WorldDB|,GameDB|,AccountDB|,Done| autosend_info| redenvelope_info' Test.log* || echo 'No match in Test.log*'"
    done
    echo
}

########################################
# 模組：等待所有 Lists 出現 ',Done'
########################################
run_wait_done() {
    echo ">>> MODULE: waitdone (wait all lists have ',Done' in Test.log*)"
    echo "==== [WAIT ALL LISTS DONE: grep ',Done' Test.log*] ===="

    while :; do
        all_done=1   # 1 = 全部完成；0 = 尚有未完成

        for lid in "${all_lists[@]}"; do
            local set_id="${list_setid[$lid]}"
            read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
            DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
            local WORLD_ID_LISTS WORLD_ID_LISTS_STR
            WORLD_ID_LISTS="${list_worlds[$lid]}"
            WORLD_ID_LISTS_STR=${WORLD_ID_LISTS// /_}
            REMOTE_BASE_DIR="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR}"

            if ssh "$MACHINE" "cd ${REMOTE_BASE_DIR}; grep -q ',Done' Test.log* 2>/dev/null"; then
                echo "[DONE] LID=${lid}, SET_ID=${set_id} ($WORLD_ID_LISTS) on $MACHINE"
            else
                echo "[WAIT] LID=${lid}, SET_ID=${set_id} ($WORLD_ID_LISTS) on $MACHINE still no ',Done' in Test.log*"
                all_done=0
            fi
        done

        if [ "$all_done" -eq 1 ]; then
            echo "==== ALL LISTS HAVE ',Done' IN Test.log*. ===="
            break
        fi

        echo "==== Not all lists finished. Sleep ${WAIT_INTERVAL} seconds then re-check... ===="
        sleep "$WAIT_INTERVAL"
    done
    echo
}

########################################
# 模組：Post DB Backup
########################################
run_post_backup() {
    echo ">>> MODULE: postbackup (Post DB backup: AccountDB / GameDB / WorldDB)"

    # a. 第一個 List (global) - AccountDB
    echo "==== [POST BACKUP] Global First List (AccountDB) ===="
    read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$FIRST_SETID_GLOBAL")
    DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
    local WORLD_ID_LISTS_FIRST_GLOBAL WORLD_ID_LISTS_STR_FIRST_GLOBAL
    WORLD_ID_LISTS_FIRST_GLOBAL="${list_worlds[$FIRST_LID_GLOBAL]}"
    WORLD_ID_LISTS_STR_FIRST_GLOBAL=${WORLD_ID_LISTS_FIRST_GLOBAL// /_}
    REMOTE_BASE_DIR_FIRST_GLOBAL="\$HOME/servers${FIRST_SETID_GLOBAL}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR_FIRST_GLOBAL}"
    REMOTE_MERGE_INI_FIRST_GLOBAL="${REMOTE_BASE_DIR_FIRST_GLOBAL}/merge_setup.ini"

    echo "[Post-AccountDB] First global list: $FIRST_LID_GLOBAL ($WORLD_ID_LISTS_FIRST_GLOBAL) on $MACHINE"
    ssh "$MACHINE" "\$HOME/bin/merge_db_backup \"${REMOTE_MERGE_INI_FIRST_GLOBAL}\" _${FILE_NAME}_Post AccountDB"

    # b. 每個 SetID 下的第一個 List - GameDB
    echo "==== [POST BACKUP] Per SET_ID First List (GameDB) ===="
    for set_id in "${!set_first_list[@]}"; do
        local FIRST_LID="${set_first_list[$set_id]}"
        read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
        local WORLD_ID_LISTS_FIRST_SET WORLD_ID_LISTS_STR_FIRST_SET
        WORLD_ID_LISTS_FIRST_SET="${list_worlds[$FIRST_LID]}"
        WORLD_ID_LISTS_STR_FIRST_SET=${WORLD_ID_LISTS_FIRST_SET// /_}
        REMOTE_BASE_DIR_FIRST_SET="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR_FIRST_SET}"
        REMOTE_MERGE_INI_FIRST_SET="${REMOTE_BASE_DIR_FIRST_SET}/merge_setup.ini"

        echo "[Post-GameDB] SET_ID=${set_id} first list: $FIRST_LID ($WORLD_ID_LISTS_FIRST_SET) on $MACHINE"
        ssh "$MACHINE" "\$HOME/bin/merge_db_backup \"${REMOTE_MERGE_INI_FIRST_SET}\" _${FILE_NAME}_Post GameDB"
    done

    # c. 每個 List - WorldDB
    echo "==== [POST BACKUP] Each List (WorldDB) ===="
    for lid in "${all_lists[@]}"; do
        local set_id="${list_setid[$lid]}"
        read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
        local WORLD_ID_LISTS WORLD_ID_LISTS_STR
        WORLD_ID_LISTS="${list_worlds[$lid]}"
        WORLD_ID_LISTS_STR=${WORLD_ID_LISTS// /_}
        REMOTE_BASE_DIR="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR}"
        REMOTE_MERGE_INI="${REMOTE_BASE_DIR}/merge_setup.ini"

        echo "[Post-WorldDB] LID=${lid}, SET_ID=${set_id} ($WORLD_ID_LISTS) on $MACHINE"
        ssh "$MACHINE" "\$HOME/bin/merge_db_backup \"${REMOTE_MERGE_INI}\" _${FILE_NAME}_Post WorldDB"
    done
    echo
}

########################################
# 模組：merge_check_v4 Pre / Post 比對
########################################
run_check_diff() {
    echo ">>> MODULE: check (merge_check_v4 compare Pre/Post, with ENVIRONMENT)"

    echo "==== [CHECK PRE vs POST] ===="
    for lid in "${all_lists[@]}"; do
        local set_id="${list_setid[$lid]}"
        read AREA MACHINE _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
        local WORLD_ID_LISTS WORLD_ID_LISTS_STR
        WORLD_ID_LISTS="${list_worlds[$lid]}"
        WORLD_ID_LISTS_STR=${WORLD_ID_LISTS// /_}
        REMOTE_BASE_DIR="\$HOME/servers${set_id}/${DIRECTORY_NAME}/${WORLD_ID_LISTS_STR}"
        REMOTE_MERGE_INI="${REMOTE_BASE_DIR}/merge_setup.ini"

        echo "[merge_check_v4] LID=${lid}, SET_ID=${set_id} ($WORLD_ID_LISTS) on $MACHINE (ENV=${ENVIRONMENT})"
        ssh "$MACHINE" "\$HOME/bin/merge_check_v4 \"${REMOTE_MERGE_INI}\" _${FILE_NAME}_Pre _${FILE_NAME}_Post $ENVIRONMENT"
    done
    echo
}

########################################
# 模組：update_db_setup（local 執行，只有 live 環境允許）
########################################
run_update_db_setup() {
    echo ">>> MODULE: update_db_setup (run update_db_setup_for_merge locally, only ENV=live)"

    if [ "$ENVIRONMENT" != "live" ]; then
        echo "Error: update_db_setup can only be executed in live environment. Current ENV=${ENVIRONMENT}." >&2
        exit 1
    fi

    for lid in "${all_lists[@]}"; do
        local WORLD_ID_LISTS="${list_worlds[$lid]}"
        echo "[update_db_setup_for_merge] LID=${lid} :: ${WORLD_ID_LISTS}"
        "$HOME/bin/update_db_setup_for_merge" $WORLD_ID_LISTS
    done
    echo
}

########################################
# 模組：move_old_server_directory（local 執行，依環境與 AREA 組 DIRECTORY_NAME）
########################################
run_move_old_server_directory() {
    echo ">>> MODULE: move_old_server_directory (run move_source_wids_directory_after_merge locally)"

    for lid in "${all_lists[@]}"; do
        local set_id="${list_setid[$lid]}"

        read AREA _ _ < <(get_area_machine_and_generator "$ENVIRONMENT" "$set_id")
        local DIRECTORY_NAME="merge_${AREA}_${FILE_NAME}_${ENVIRONMENT}"
        local WORLD_ID_LISTS="${list_worlds[$lid]}"

        echo "[move_source_wids_directory_after_merge] LID=${lid}, SET_ID=${set_id}, ENV=${ENVIRONMENT}, DIR=${DIRECTORY_NAME} :: ${WORLD_ID_LISTS}"
        "$HOME/bin/move_source_wids_directory_after_merge" "$ENVIRONMENT" "$DIRECTORY_NAME" $WORLD_ID_LISTS
    done
    echo
}

########################################
# 模組：removebackup（刪除 Pre / Post 備份 DB）
########################################
run_remove_backup() {
    echo ">>> MODULE: removebackup (drop backup databases _${FILE_NAME}_Pre / _${FILE_NAME}_Post)"

    if [ "$ENVIRONMENT" = "test" ]; then
        echo "==== [removebackup] ENV=test, use MERGE_* machines ===="
        for m in MERGE_COMMON MERGE_ASIA MERGE_US MERGE_EU; do
            echo "[removebackup] test env on ${m} for FILE_NAME=${FILE_NAME}"
            ssh "$m" "\$HOME/bin/drop_database_for_current_machine_by_pattern postfix _${FILE_NAME}_Pre; \
\$HOME/bin/drop_database_for_current_machine_by_pattern postfix _${FILE_NAME}_Post"
        done
    else
        echo "==== [removebackup] ENV=live, use sendscript alldb ===="
        echo "[removebackup] live env via sendscript alldb for FILE_NAME=${FILE_NAME}"
        sendscript alldb "\$HOME/bin/drop_database_for_current_machine_by_pattern postfix _${FILE_NAME}_Pre; \
\$HOME/bin/drop_database_for_current_machine_by_pattern postfix _${FILE_NAME}_Post"
    fi

    echo
}

########################################
# 模組：remove_source_wids_on_hosts（只允許 live，呼叫 remove_source_wids_on_hosts_after_merge）
########################################
run_remove_source_wids_on_hosts() {
    echo ">>> MODULE: remove_source_wids_on_hosts (backup hosts and call remove_source_wids_on_hosts_after_merge, ENV=live only)"

    if [ "$ENVIRONMENT" != "live" ]; then
        echo "Error: remove_source_wids_on_hosts can only be executed in live environment. Current ENV=${ENVIRONMENT}." >&2
        exit 1
    fi

    local HOSTS_FILE="$HOME/bin/hosts"
    local HOSTS_BAK="$HOME/bin/hosts.old"

    if [ ! -f "$HOSTS_FILE" ]; then
        echo "Error: hosts file not found: $HOSTS_FILE" >&2
        exit 1
    fi

    echo "Backup hosts: $HOSTS_FILE -> $HOSTS_BAK"
    cp -arf "$HOSTS_FILE" "$HOSTS_BAK"

    echo "Call remove_source_wids_on_hosts_after_merge for each WORLD_ID_LISTS ..."
    for lid in "${all_lists[@]}"; do
        local WORLD_ID_LISTS="${list_worlds[$lid]}"
        echo "[remove_source_wids_on_hosts_after_merge] LID=${lid} :: ${WORLD_ID_LISTS}"
        "$HOME/bin/remove_source_wids_on_hosts_after_merge" $WORLD_ID_LISTS
    done

    echo "Done remove_source_wids_on_hosts."
    echo
}

########################################
# 模組執行入口
########################################
case "$MODULE" in
    exec_merge)
        run_generate
        run_db_connect_verify
        run_pre_backup
        run_merge_exec
        run_log_check
        run_wait_done
        run_post_backup
        run_check_diff
        ;;
    after_merge)
        run_update_db_setup
        run_move_old_server_directory
        run_remove_source_wids_on_hosts
        ;;
    end_merge)
        run_remove_backup
        ;;
    generate)
        run_generate
        ;;
    dbcheck)
        run_db_connect_verify
        ;;
    prebackup)
        run_pre_backup
        ;;
    merge)
        run_merge_exec
        ;;
    logcheck)
        run_log_check
        ;;
    waitdone)
        run_wait_done
        ;;
    postbackup)
        run_post_backup
        ;;
    check)
        run_check_diff
        ;;
    update_db_setup)
        run_update_db_setup
        ;;
    move_old_server_directory)
        run_move_old_server_directory
        ;;
    removebackup)
        run_remove_backup
        ;;
    remove_source_wids_on_hosts)
        run_remove_source_wids_on_hosts
        ;;
    *)
        echo "Error: unknown MODULE '${MODULE}'." >&2
        echo "Supported: exec_merge | generate | dbcheck | prebackup | merge | logcheck | waitdone | postbackup | check | update_db_setup | move_old_server_directory | removebackup | after_merge | end_merge | remove_source_wids_on_hosts" >&2
        exit 1
        ;;
esac

########################################
# 結束時間 & 總耗時
########################################
END_TS=$(date +%s)
END_TIME=$(date '+%Y-%m-%d %H:%M:%S')
ELAPSED=$((END_TS - START_TS))
ELAPSED_H=$((ELAPSED / 3600))
ELAPSED_M=$(((ELAPSED % 3600) / 60))
ELAPSED_S=$((ELAPSED % 60))

echo
echo "== run_merge_n1 finished (MODULE=${MODULE}) =="
echo "Start time : ${START_TIME}"
echo "End time   : ${END_TIME}"
printf 'Elapsed    : %02d 小時 %02d 分 %02d 秒\n' "$ELAPSED_H" "$ELAPSED_M" "$ELAPSED_S"
echo "ENV=${ENVIRONMENT}, FILE_NAME=${FILE_NAME}"

