#!/usr/bin/env bash
# ==========================================================
# ProxMenux - Global Share Functions (reusable)
# File: scripts/global/share_common.func
# ==========================================================



if [[ -n "${__PROXMENUX_SHARE_COMMON__}" ]]; then
    return 0
fi
__PROXMENUX_SHARE_COMMON__=1


: "${PROXMENUX_DEFAULT_SHARE_GROUP:=sharedfiles}"


: "${PROXMENUX_SHARE_MAP_DB:=/usr/local/share/proxmenux/share-map.db}"


mkdir -p "$(dirname "$PROXMENUX_SHARE_MAP_DB")" 2>/dev/null || true
touch "$PROXMENUX_SHARE_MAP_DB" 2>/dev/null || true


pmx_share_map_get() {

    local key="$1"
    awk -F'=' -v k="$key" '$1==k {print $2}' "$PROXMENUX_SHARE_MAP_DB" 2>/dev/null | tail -n1
}


pmx_share_map_set() {

    local key="$1" val="$2"

    sed -i "\|^${key}=|d" "$PROXMENUX_SHARE_MAP_DB" 2>/dev/null || true
    echo "${key}=${val}" >> "$PROXMENUX_SHARE_MAP_DB"
}





pmx_choose_or_create_group__() {

    local default_group="${1:-$PROXMENUX_DEFAULT_SHARE_GROUP}"
    local choice group_name
    choice=$(whiptail --title "$(translate "Shared Group")" --menu "$(translate "Choose a group policy for this shared directory:")" 18 78 6 \
        "1"  "$(translate "Use sharefiles group default (recommended)")" \
        "2"  "$(translate "Create a new group for isolation")" \
        "3"  "$(translate "Select an existing group")" \
        3>&1 1>&2 2>&3) || { echo ""; return 1; }

    case "$choice" in
        1)

            pmx_ensure_host_group "$default_group" >/dev/null || return 1
            echo "$default_group"
            ;;
        2)
            group_name=$(whiptail --inputbox "$(translate "Enter new group name:")" 10 70 "sharedfiles-project" --title "$(translate "New Group")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
            [[ -z "$group_name" ]] && { msg_error "$(translate "Group name cannot be empty.")"; echo ""; return 1; }
            pmx_ensure_host_group "$group_name" >/dev/null || return 1
            echo "$group_name"
            ;;
        3)

            groups=$(getent group | awk -F: '$3 >= 1000 && $1 != "nogroup" && $1 !~ /^pve/ {print $1 ":" $3}')
            if [[ -z "$groups" ]]; then
                whiptail --title "$(translate "Groups")" --msgbox "$(translate "No user groups found.")" 8 60
                echo ""; return 1
            fi


            menu_args=()
            while IFS=: read -r gname gid; do
                menu_args+=("$gname" "GID=$gid")
            done <<< "$groups"

            group_name=$(whiptail --title "$(translate "Existing Groups")" --menu "$(translate "Select an existing group:")" 20 70 12 \
                "${menu_args[@]}" \
                3>&1 1>&2 2>&3) || { echo ""; return 1; }

            pmx_ensure_host_group "$group_name" >/dev/null || return 1
            echo "$group_name"
            ;;

        *) echo ""; return 1;;
    esac
}







pmx_ensure_host_group__() {

    local group_name="$1"
    local suggested_gid="$2"

    if ! getent group "$group_name" >/dev/null 2>&1; then
        if [[ -n "$suggested_gid" ]]; then

            if getent group "$suggested_gid" >/dev/null 2>&1; then
                msg_error "$(translate "GID already in use:") $suggested_gid"
                return 1
            fi
            groupadd -g "$suggested_gid" "$group_name" >/dev/null 2>&1
        else
            groupadd "$group_name" >/dev/null 2>&1
        fi

        if [[ $? -eq 0 ]]; then
            msg_ok "$(translate "Group created:") $group_name"
        else
            msg_error "$(translate "Failed to create group:") $group_name"
            return 1
        fi
    fi

    local gid
    gid="$(getent group "$group_name" | cut -d: -f3)"
    if [[ -z "$gid" ]]; then
        msg_error "$(translate "Failed to resolve group GID for") $group_name"
        return 1
    fi

    echo "$gid"
    return 0
}














pmx_choose_or_create_group() {
    local default_group="${1:-$PROXMENUX_DEFAULT_SHARE_GROUP}"
    local choice group_name groups menu_args gid_min

    # Detect GID_MIN (fallback 1000)
    gid_min="$(awk '/^\s*GID_MIN\s+[0-9]+/ {print $2}' /etc/login.defs 2>/dev/null | tail -n1)"
    [[ -z "$gid_min" ]] && gid_min=1000

    choice=$(whiptail --title "$(translate "Shared Group")" \
        --menu "$(translate "Choose a group policy for this shared directory:")" 18 78 6 \
        "1"  "$(translate "Use default group:") $default_group $(translate "(recommended)")" \
        "2"  "$(translate "Create a new group for isolation")" \
        "3"  "$(translate "Select an existing group")" \
        3>&1 1>&2 2>&3) || { echo ""; return 1; }

    case "$choice" in
        1)
            # Ensure exists; auto GID >= 101000 if creation is needed
            pmx_ensure_host_group "$default_group" >/dev/null || { echo ""; return 1; }
            echo "$default_group"
            ;;

        2)
            group_name=$(whiptail --inputbox "$(translate "Enter new group name:")" 10 70 "sharedfiles-project" \
                --title "$(translate "New Group")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }

            if [[ -z "$group_name" ]]; then
                msg_error "$(translate "Group name cannot be empty.")"
                echo ""; return 1
            fi
            # POSIX-ish validation: start with letter/_ ; then letters/digits/_/-
            if ! [[ "$group_name" =~ ^[a-zA-Z_][a-zA-Z0-9_-]*$ ]]; then
                msg_error "$(translate "Invalid group name. Use letters, digits, underscore or hyphen, and start with a letter or underscore.")"
                echo ""; return 1
            fi

            pmx_ensure_host_group "$group_name" >/dev/null || { echo ""; return 1; }
            echo "$group_name"
            ;;

        3)
            # Build list of real user groups (>= GID_MIN), exclude nogroup and pve*
            groups=$(getent group | awk -F: -v MIN="$gid_min" '
                $3 >= MIN && $1 != "nogroup" && $1 !~ /^pve/ {print $0}
            ' | sort -t: -k1,1)

            if [[ -z "$groups" ]]; then
                whiptail --title "$(translate "Groups")" --msgbox "$(translate "No user groups found.")" 8 60
                echo ""; return 1
            fi

            menu_args=()
            while IFS=: read -r gname _ gid members; do
                menu_args+=("$gname" "GID=$gid")
            done <<< "$groups"

            group_name=$(whiptail --title "$(translate "Existing Groups")" \
                --menu "$(translate "Select an existing group:")" 20 70 12 \
                "${menu_args[@]}" 3>&1 1>&2 2>&3) || { echo ""; return 1; }

            # Ensure (no-op if exists)
            pmx_ensure_host_group "$group_name" >/dev/null || { echo ""; return 1; }
            echo "$group_name"
            ;;

        *)
            echo ""; return 1
            ;;
    esac
}








pmx_ensure_host_group() {
    local group_name="$1"
    local suggested_gid="${2:-}"
    local base_gid=101000
    local new_gid gid

    # Si ya existe, devuelve su GID
    if getent group "$group_name" >/dev/null 2>&1; then
        gid="$(getent group "$group_name" | cut -d: -f3)"
        echo "$gid"
        return 0
    fi

    if [[ -n "$suggested_gid" ]]; then
        # Verifica que el GID sugerido esté libre
        if getent group "$suggested_gid" >/dev/null 2>&1; then
            msg_error "$(translate "GID already in use:") $suggested_gid"
            echo ""
            return 1
        fi
        if ! groupadd -g "$suggested_gid" "$group_name" >/dev/null 2>&1; then
            msg_error "$(translate "Failed to create group:") $group_name"
            echo ""
            return 1
        fi
        msg_ok "$(translate "Group created:") $group_name"
    else
        # Busca el primer GID libre >= 101000
        new_gid="$base_gid"
        while getent group "$new_gid" >/dev/null 2>&1; do
            new_gid=$((new_gid+1))
        done
        if ! groupadd -g "$new_gid" "$group_name" >/dev/null 2>&1; then
            msg_error "$(translate "Failed to create group:") $group_name"
            echo ""
            return 1
        fi
        msg_ok "$(translate "Group created:") $group_name"
    fi

    gid="$(getent group "$group_name" | cut -d: -f3)"
    if [[ -z "$gid" ]]; then
        msg_error "$(translate "Failed to resolve group GID for") $group_name"
        echo ""
        return 1
    fi

    echo "$gid"
    return 0
}










pmx_prepare_host_shared_dir() {

    local dir="$1" group_name="$2"
    [[ -z "$dir" || -z "$group_name" ]] && { msg_error "$(translate "Internal error: missing arguments in pmx_prepare_host_shared_dir")"; return 1; }

    if [[ ! -d "$dir" ]]; then
        if mkdir -p "$dir" 2>/dev/null; then
            msg_ok "$(translate "Created directory on host:") $dir"
        else
            msg_error "$(translate "Failed to create directory on host:") $dir"
            return 1
        fi
    fi

    chown -R root:"$group_name" "$dir" 2>/dev/null || true
    chmod -R 2775 "$dir" 2>/dev/null || true

    if command -v setfacl >/dev/null 2>&1; then
        setfacl -R -m d:g:"$group_name":rwx -m d:o::rx -m g:"$group_name":rwx "$dir" 2>/dev/null || true
        msg_ok "$(translate "Default ACLs applied for group inheritance.")"
    else
        msg_warn "$(translate "setfacl not found; default ACLs were not applied.")"
    fi
    return 0
}







pmx_select_host_mount_point_() {

    local title="${1:-$(translate "Select Mount Point")}"
    local default_path="${2:-/mnt/shared}"
    local choice folder_name result

    while true; do
        choice=$(whiptail --title "$title" --menu "$(translate "Where do you want the host folder?")" 16 76 4 \
            "mnt"   "$(translate "Create folder in /mnt")" \
            "srv"   "$(translate "Create folder in /srv")" \
            "media" "$(translate "Create folder in /media")" \
            "custom" "$(translate "Enter custom path")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }

        case "$choice" in
            mnt)
                folder_name=$(whiptail --inputbox "$(translate "Enter folder name for /mnt:")" 10 70 "shared" --title "$(translate "Folder Name")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$folder_name" ]] && continue
                echo "/mnt/$folder_name"; return 0;;
            srv)
                folder_name=$(whiptail --inputbox "$(translate "Enter folder name for /srv:")" 10 70 "shared" --title "$(translate "Folder Name")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$folder_name" ]] && continue
                echo "/srv/$folder_name"; return 0;;
            media)
                folder_name=$(whiptail --inputbox "$(translate "Enter folder name for /media:")" 10 70 "shared" --title "$(translate "Folder Name")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$folder_name" ]] && continue
                echo "/media/$folder_name"; return 0;;
            custom)
                result=$(whiptail --inputbox "$(translate "Enter full path:")" 10 80 "$default_path" --title "$(translate "Custom Path")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$result" ]] && continue
                echo "$result"; return 0;;
        esac
    done
}












pmx_select_host_mount_point__() {
    local title="${1:-$(translate "Select Mount Point")}"
    local default_path="${2:-/mnt/shared}"
    local choice folder_name result

    while true; do
        choice=$(whiptail --title "$title" --menu "$(translate "Where do you want the host folder?")" 16 76 4 \
            "mnt"   "$(translate "Create folder in /mnt")" \
            "srv"   "$(translate "Create folder in /srv")" \
            "media" "$(translate "Create folder in /media")" \
            "custom" "$(translate "Enter custom path")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }

        case "$choice" in
            mnt)
                folder_name=$(whiptail --inputbox "$(translate "Enter folder name for /mnt:")" 10 70 "$(basename "$default_path")" --title "$(translate "Folder Name")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$folder_name" ]] && continue
                echo "/mnt/$folder_name"; return 0;;
            srv)
                folder_name=$(whiptail --inputbox "$(translate "Enter folder name for /srv:")" 10 70 "$(basename "$default_path")" --title "$(translate "Folder Name")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$folder_name" ]] && continue
                echo "/srv/$folder_name"; return 0;;
            media)
                folder_name=$(whiptail --inputbox "$(translate "Enter folder name for /media:")" 10 70 "$(basename "$default_path")" --title "$(translate "Folder Name")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$folder_name" ]] && continue
                echo "/media/$folder_name"; return 0;;
            custom)
                result=$(whiptail --inputbox "$(translate "Enter full path:")" 10 80 "$default_path" --title "$(translate "Custom Path")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$result" ]] && continue
                echo "$result"; return 0;;
        esac
    done
}







pmx_select_host_mount_point() {
    local title="${1:-$(translate "Select Mount Point")}"
    local default_path="${2:-/mnt/shared}"
    local context="${3:-local}"   
    local choice folder_name result existing_dirs mount_point

    while true; do
        choice=$(whiptail --title "$title" --menu "$(translate "Where do you want the host folder?")" 16 76 3 \
            "1"  "$(translate "Create new folder in /mnt")" \
            "2" "$(translate "Use existing folder")" \
            "3"  "$(translate "Enter custom path")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }

        case "$choice" in
            1)
                folder_name=$(whiptail --inputbox "$(translate "Enter folder name for /mnt:")" 10 70 "$(basename "$default_path")" --title "$(translate "Folder Name")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$folder_name" ]] && continue
                mount_point="/mnt/$folder_name"
                echo "$mount_point"; return 0
                ;;
            
            2)
                existing_dirs=($(ls -1d /mnt/*/ 2>/dev/null | sed 's:/$::'))
                if [[ ${#existing_dirs[@]} -eq 0 ]]; then
                    whiptail --msgbox "$(translate "No existing folders found in /mnt")" 8 60
                    continue
                fi
                mount_point=$(whiptail --title "$(translate "Select Existing Folder")" \
                    --menu "$(translate "Choose a folder in /mnt:")" 20 70 10 \
                    $(for d in "${existing_dirs[@]}"; do echo "$d" "$(basename "$d")"; done) \
                    3>&1 1>&2 2>&3) || continue

                if [[ "$context" =~ ^(nfs|samba)$ ]] && [[ -n "$(ls -A "$mount_point" 2>/dev/null)" ]]; then
                    whiptail --yesno "$(translate "Warning: The selected folder is not empty. Files may not be accessible once the network share is mounted. Proceed anyway?")" 12 70 || continue
                fi
                echo "$mount_point"; return 0
                ;;
            
            3)
                result=$(whiptail --inputbox "$(translate "Enter full path:")" 10 80 "$default_path" --title "$(translate "Custom Path")" 3>&1 1>&2 2>&3) || { echo ""; return 1; }
                [[ -z "$result" ]] && continue
                echo "$result"; return 0
                ;;
        esac
    done
}







select_host_directory_() {
    local method choice result

    method=$(whiptail --title "$(translate "Select Host Directory")" --menu "$(translate "How do you want to select the host folder to mount?")" 15 70 4 \
        "mnt" "$(translate "Select from /mnt directories")" \
        "srv" "$(translate "Select from /srv directories")" \
        "media" "$(translate "Select from /media directories")" \
        "manual" "$(translate "Enter path manually")" 3>&1 1>&2 2>&3) || return 1

    case "$method" in
        mnt|srv|media)
            local base_path="/$method"
            local host_dirs=("$base_path"/*)
            local options=()
            
            for dir in "${host_dirs[@]}"; do
                if [[ -d "$dir" ]]; then
                    options+=("$dir" "$(basename "$dir")")
                fi
            done
            
            if [[ ${#options[@]} -eq 0 ]]; then
                msg_error "$(translate "No directories found in") $base_path"
                return 1
            fi
            
            result=$(whiptail --title "$(translate "Select Host Folder")" \
                --menu "$(translate "Select the folder to mount:")" 20 80 10 "${options[@]}" 3>&1 1>&2 2>&3)
            ;;
        manual)
            result=$(whiptail --title "$(translate "Enter Path")" \
                --inputbox "$(translate "Enter the full path to the host folder:")" 10 70 "/mnt/" 3>&1 1>&2 2>&3)
            ;;
    esac

    if [[ -z "$result" ]]; then
        return 1
    fi

    if [[ ! -d "$result" ]]; then
        msg_error "$(translate "The selected path is not a valid directory:") $result"
        return 1
    fi

    echo "$result"
}







select_host_directory() {
    local method choice result

    method=$(whiptail --title "$(translate "Select Host Directory")" --menu "$(translate "How do you want to select the host folder to mount?")" 15 70 4 \
        "mnt" "$(translate "Select from /mnt directories")" \
        "manual" "$(translate "Enter path manually")" 3>&1 1>&2 2>&3) || return 1

    case "$method" in
        mnt|srv|media)
            local base_path="/$method"
            local host_dirs=("$base_path"/*)
            local options=()
            
            for dir in "${host_dirs[@]}"; do
                if [[ -d "$dir" ]]; then
                    options+=("$dir" "$(basename "$dir")")
                fi
            done
            
            if [[ ${#options[@]} -eq 0 ]]; then
                msg_error "$(translate "No directories found in") $base_path"
                return 1
            fi
            
            result=$(whiptail --title "$(translate "Select Host Folder")" \
                --menu "$(translate "Select the folder to mount:")" 20 80 10 "${options[@]}" 3>&1 1>&2 2>&3)
            ;;
        manual)
            result=$(whiptail --title "$(translate "Enter Path")" \
                --inputbox "$(translate "Enter the full path to the host folder:")" 10 70 "/mnt/" 3>&1 1>&2 2>&3)
            ;;
    esac

    if [[ -z "$result" ]]; then
        return 1
    fi

    if [[ ! -d "$result" ]]; then
        msg_error "$(translate "The selected path is not a valid directory:") $result"
        return 1
    fi

    echo "$result"
}







select_lxc_container() {
    local ct_list ctid ct_status
    
    ct_list=$(pct list | awk 'NR>1 {print $1, $2, $3}')
    if [[ -z "$ct_list" ]]; then
        dialog --title "$(translate "Error")" \
            --msgbox "$(translate "No LXC containers available")" 8 50
        return 1
    fi

    local options=()
    while read -r id name status; do
        if [[ -n "$id" ]]; then
            options+=("$id" "$name ($status)")
        fi
    done <<< "$ct_list"

    ctid=$(dialog --title "$(translate "Select LXC Container")" \
        --menu "$(translate "Select container:")" 20 70 12 \
        "${options[@]}" 3>&1 1>&2 2>&3)
    
    if [[ -z "$ctid" ]]; then
        return 1
    fi

    echo "$ctid"
    return 0
}