kls/kls

#!/usr/bin/env python3
import curses
import subprocess

stdscr = None

def init_screen():
    global stdscr
    stdscr = curses.initscr()
    stdscr.refresh()
    curses.noecho()
    curses.cbreak()
    stdscr.keypad(True)
    curses.curs_set(0)

init_screen()    

class Menu:
    def __init__(self, name, rows, begin_x):
        self.name = name # заголовок окна
        self.rows = rows
        self.begin_x = begin_x
        self.win = curses.newwin(curses.LINES, curses.COLS // 3, 0, begin_x)
        self.win.box()
        self.win.addstr(1, 2, self.name) 
        for index, row in enumerate(self.rows):
            self.win.addstr(index + 3, 2, row)
        self.row = 0


# рисуем первое меню
## готовим контент
bytes_list = subprocess.check_output("kubectl get ns --no-headers -o template='{{range .items}}{{.metadata.name}} {{end}}'", shell=True).split()
namespaces = [bytes_list[i].decode('utf-8') for i in range(len(bytes_list))]
## отрисовываем меню
menu1 = Menu("Namespaces", namespaces, 0)

# рисуем второе меню
## готовим контент
api_resources = ["pods", "services", "deployments", "ingresses"]
## отрисовываем меню
menu2 = Menu("API resources", api_resources, 0 + curses.COLS // 3)

# рисуем третье меню
## готовим контент
bytes_list = subprocess.check_output("kubectl get pods -n kube-system --no-headers -o template='{{range .items}}{{.metadata.name}} {{end}}'", shell=True).split()
pods = [bytes_list[i].decode('utf-8') for i in range(len(bytes_list))]
## отрисовываем меню
menu3 = Menu("Resources", pods, 0 + curses.COLS // 3 * 2)

menus = [menu1, menu2, menu3]

def run_command(command, current_menu, rows=None):
    namespace = menus[0].rows[menus[0].row]
    api_resource = menus[1].rows[menus[1].row]
    resource = menus[2].rows[menus[2].row]
    subprocess.call(eval(command), shell=True)
    init_screen()
    for menu in menus:
        menu.win.clear()
        menu.win.box()
        menu.win.addstr(1, 2, menu.name)
        if rows and menu.name == "Resources":
            menu.rows = rows
            menu.row = 0
        for index, row in enumerate(menu.rows):
            menu.win.addstr(index + 3, 2, row)
        menu.win.addstr(menu.row + 3, 2, menu.rows[menu.row], curses.A_REVERSE | curses.A_ITALIC)
    menus[current_menu].win.addstr(1, 2, menus[current_menu].name, curses.A_REVERSE | curses.A_ITALIC) 


def navigate_horizontally(direction, current_menu):
    increment = {"right": 1, "left": -1}
    menus[current_menu].win.addstr(1, 2, menus[current_menu].name)  # удаляем выделение с текущего меню
    current_menu = (current_menu + increment[direction]) % 3  # переходим к предыдущему/следующему меню
    menus[current_menu].win.addstr(1, 2, menus[current_menu].name, curses.A_REVERSE | curses.A_ITALIC)  # и выделяем его
    return current_menu


def navigate_vertically(direction, current_menu):
    increment = {"down": 1, "up": -1}
    if current_menu == 2 and menus[2].rows[menus[2].row].startswith("No resources"):
        return
    menu = menus[current_menu]
    menu.win.addstr(menu.row + 3, 2, menu.rows[menu.row])  # удаляем выделение с текущей строки
    menu.row = (menu.row + increment[direction]) % len(menu.rows) # переходим к предыдущей/следующей строке
    menu.win.addstr(menu.row + 3, 2, menu.rows[menu.row], curses.A_REVERSE | curses.A_ITALIC) # и выделяем её
    if current_menu != 2: # если изменился выбор нэймспейса или апи ресурса
        namespace = menus[0].rows[menus[0].row]
        api_resource = menus[1].rows[menus[1].row]
        command = "f'kubectl get {api_resource} -n {namespace} --no-headers -o template=\"{{{{range .items}}}}{{{{.metadata.name}}}} {{{{end}}}}\"'"
        bytes_list = subprocess.check_output(eval(command), shell=True).split()
        resources = [bytes_list[i].decode('utf-8') for i in range(len(bytes_list))]
        if not resources:
            resources = [f"No resources found in {namespace} namespace.",]
        run_command(command, current_menu, rows=resources)


def main(stdscr):
    stdscr.refresh()
    running = True
    current_menu = 0
    menus[current_menu].win.addstr(1, 2, menus[current_menu].name, curses.A_REVERSE | curses.A_ITALIC) 
    for menu in menus:
        menu.win.addstr(3, 2, menu.rows[menu.row], curses.A_REVERSE | curses.A_ITALIC)
    while running:
        [menu.win.refresh() for menu in menus]  # refresh all menus
        key_pressed = stdscr.getkey()
        match key_pressed:
            case 'q': 
                running = False
            case 'g': 
                if current_menu == 2 and not menus[2].rows[menus[2].row].startswith("No resources"):
                    run_command("f'kubectl -n {namespace} get {api_resource} {resource} -o yaml | batcat -l yaml --paging always --style numbers'", current_menu)
            case 'd': 
                if current_menu == 2 and not menus[2].rows[menus[2].row].startswith("No resources"):
                    run_command("f'kubectl -n {namespace} describe {api_resource} {resource} | batcat -l yaml --paging always --style numbers'", current_menu)
            case 'l': 
                if current_menu == 2 and not menus[2].rows[menus[2].row].startswith("No resources") and menus[1].rows[menus[1].row] == "pods":
                    run_command("f'kubectl -n {namespace} logs {resource} | batcat -l log --paging always --style numbers'", current_menu)
            case 'e': 
                if current_menu == 2 and not menus[2].rows[menus[2].row].startswith("No resources"):
                    run_command("f'kubectl edit {api_resource} -n {namespace} {resource}'", current_menu)
            case '\t' | "KEY_RIGHT":
                current_menu = navigate_horizontally("right", current_menu)
            case "KEY_BTAB" | "KEY_LEFT":
                current_menu = navigate_horizontally("left", current_menu)
            case "KEY_DOWN":
                navigate_vertically("down", current_menu)
            case "KEY_UP":
                navigate_vertically("up", current_menu)

main(stdscr)

curses.nocbreak()
stdscr.keypad(False)
curses.echo()
curses.endwin()
subprocess.call(["clear"])