from time import sleep

import os

import curses 
from curses import panel
import random
import collections
import operator
import datetime

g_curses_active = False

#
def percentage (a, total):
    x = int ((float(a) / total) * 100)
    return str(x) + "%"

# panel object
class TrexStatusPanel():
    def __init__ (self, h, l, y, x, headline):
        self.h = h
        self.l = l
        self.y = y
        self.x = x
        self.headline = headline

        self.win = curses.newwin(h, l, y, x)
        self.win.erase()
        self.win.box()

        self.win.addstr(1, 2, headline, curses.A_UNDERLINE)
        self.win.refresh()

        panel.new_panel(self.win)
        self.panel = panel.new_panel(self.win)
        self.panel.top()

    def clear (self):
        self.win.erase()
        self.win.box()
        self.win.addstr(1, 2, self.headline, curses.A_UNDERLINE)

    def getwin (self):
        return self.win

def float_to_human_readable (size, suffix = "bps"):
    for unit in ['','K','M','G']:
        if abs(size) < 1024.0:
            return "%3.1f %s%s" % (size, unit, suffix)
        size /= 1024.0
    return "NaN"

# status object
class TrexStatus():
    def __init__ (self, stdscr, rpc_client):
        self.stdscr = stdscr
        self.log = []
        self.rpc_client = rpc_client

        self.get_server_info()

    def get_server_info (self):
        rc, msg = self.rpc_client.get_rpc_server_status()

        if rc:
            self.server_status = msg
        else:
            self.server_status = None

    def add_log_event (self, msg):
        self.log.append("[{0}] {1}".format(str(datetime.datetime.now().time()), msg))

    def add_panel (self, h, l, y, x, headline):
         win = curses.newwin(h, l, y, x)
         win.erase()
         win.box()

         win.addstr(1, 2, headline)
         win.refresh()

         panel.new_panel(win)
         panel1 = panel.new_panel(win)
         panel1.top()

         return win, panel1

    def update_info (self):
        if self.server_status == None:
            return

        self.info_panel.clear()

        self.info_panel.getwin().addstr(3, 2, "{:<30} {:30}".format("Version:", self.server_status["general"]["version"]))
        self.info_panel.getwin().addstr(4, 2, "{:<30} {:30}".format("Build:", 
                                                                    self.server_status["general"]["build_date"] + " @ " + self.server_status["general"]["build_time"] + " by " + self.server_status["general"]["version_user"]))

        self.info_panel.getwin().addstr(5, 2, "{:<30} {:30}".format("Server Uptime:", self.server_status["general"]["uptime"]))
        #self.ft_panel.clear()

        #ft_section_y  = 3
        #self.ft_panel.getwin().addstr(ft_section_y, 2,"General Info:", curses.A_UNDERLINE)

        #self.ft_panel.getwin().addstr(ft_section_y, 2, "{:<30} {:<30,}".format("Total Flows Opened:", ft_stats["total-opened-flows"]))
        #ft_section_y = ft_section_y + 1
        #self.ft_panel.getwin().addstr(ft_section_y, 2, "{:<30} {:<30,}".format("Total Flows Closed:", ft_stats["total-closed-flows"]))
        #ft_section_y = ft_section_y + 1
        #self.ft_panel.getwin().addstr(ft_section_y, 2, "{:<30} {:<30,}".format("Current Active Flows:", ft_stats["active-flows"]))
        #ft_section_y = ft_section_y + 1
        #self.ft_panel.getwin().addstr(ft_section_y, 2, "{:<30} {:<30,}".format("Flow Allocation Errors:", ft_stats["allocation_err"]))

    def update_general (self, gen_stats):

        if not gen_stats:
            return

        transport_info_section_y  = 3
        general_info_section_y    = int(self.cls_panel.h * 0.5)

        self.general_panel.clear()

        # transport layer info
        self.general_panel.getwin().addstr(transport_info_section_y, 2, "{:<30} {:^10} {:^5} {:^10}".format("Total Tx Rate:", 
                                                                                                            float_to_human_readable(gen_stats["total-rx-bps"]),
                                                                                                            "/",
                                                                                                            float_to_human_readable(gen_stats["total-rx-pps"], suffix = "pps")))
        transport_info_section_y += 2


        self.general_panel.getwin().addstr(transport_info_section_y, 2, "{:<30} {:^6.2f} %".format("DP Core Util.:", gen_stats["cpu-util"]));

        transport_info_section_y += 2

        for i in range(1, 3):
            self.general_panel.getwin().addstr(transport_info_section_y, 2, "{:<30} {:^10} {:^5} {:^10}".format("Port {0} Rx:".format(i), 
                                                                                                          float_to_human_readable(gen_stats["port " + str(i)]["total-rx-bps"]),
                                                                                                          "/",
                                                                                                          float_to_human_readable(gen_stats["port " + str(i)]["total-rx-pps"], suffix = "pps")))
            transport_info_section_y += 1


        self.general_panel.getwin().addstr(general_info_section_y, 2,"General Info:", curses.A_UNDERLINE)
        general_info_section_y = general_info_section_y + 2

        self.general_panel.getwin().addstr(general_info_section_y, 2, "{:<30} {:<30}".format("VNBAR Main Process PID:", os.getppid()))
        general_info_section_y = general_info_section_y + 1
        self.general_panel.getwin().addstr(general_info_section_y, 2, "{:<30} {:<30}".format("ZMQ client online at:", vnbar_ipc.VnbarIpc.get_zmq_transport_name()))
        

    # v2
    def update_cls (self, pd_stats):
        if not pd_stats:
            return

        self.cls_panel.clear()

        section_start = 3
        section_size  = (self.cls_panel.h / 2) - 5

        for port_name, pd in sorted(pd_stats.iteritems()):
            if pd == None:
                continue

            # sort by bandwidth
            pd = collections.OrderedDict(sorted(pd.items(), key=operator.itemgetter(1), reverse = True))

            # restart the line index
            line_index = 0

            # headline
            self.cls_panel.getwin().addstr(section_start + line_index, 2, "{0}:".format(port_name), curses.A_BOLD | curses.A_UNDERLINE)
            line_index += 1

            cls_str = "{:^45} {:^20} {:^20} {:^20}".format("Protocol Name", "Byte Count", "Packet Count", "B/W Perc.")
            self.cls_panel.getwin().addstr(section_start + line_index, 2, cls_str)
            line_index += 2

            # protocols
            proto_index = 0
            proto_count = len(pd)

            total_bandwidth = sum([i['bytes'] for i in pd.values()])

            for proto_name, cnts in pd.iteritems():
                proto_str = "{:<45} {:^20,} {:^20,} {:^20}".format(proto_name, cnts['bytes'], cnts['pkts'], percentage(cnts['bytes'], total_bandwidth) )
                proto_index = proto_index + 1

                if line_index > section_size:
                    self.cls_panel.getwin().addstr(section_start + line_index, 2, "<...{0} More...>".format(proto_count - proto_index), (curses.A_DIM if ((line_index % 2) == 0) else curses.A_BOLD))
                    break

                self.cls_panel.getwin().addstr(section_start + line_index, 2, proto_str, (curses.A_DIM if ((line_index % 2) == 0) else curses.A_BOLD))

                line_index += 1

            section_start = section_start + section_size + 3
   

    def update_control (self):
        self.control_panel.clear()

        self.control_panel.getwin().addstr(1, 2, "'f' - freeze, 'c' - clear stats, 'p' - ping server, 'q' - quit")

        index = 3

        cut = len(self.log) - 4
        if cut < 0:
            cut = 0

        for l in self.log[cut:]:
            self.control_panel.getwin().addstr(index, 2, l)
            index += 1

    def run (self):
        try:
            curses.curs_set(0)
        except:
            pass

        curses.use_default_colors()        
        self.stdscr.nodelay(1)
        curses.nonl()
        curses.noecho()

        self.max_y = self.stdscr.getmaxyx()[0]
        self.max_x = self.stdscr.getmaxyx()[1]

        # create cls panel
        self.main_panel = TrexStatusPanel(int(self.max_y * 0.8), self.max_x / 2, 0,0, "Trex Activity:")

        self.general_panel = TrexStatusPanel(int(self.max_y * 0.6), self.max_x / 2, 0, self.max_x /2, "General Statistics:")

        self.info_panel    = TrexStatusPanel(int(self.max_y * 0.2), self.max_x / 2, int(self.max_y * 0.6), self.max_x /2, "Server Info:")

        self.control_panel = TrexStatusPanel(int(self.max_y * 0.2), self.max_x , int(self.max_y * 0.8), 0, "")

        panel.update_panels(); self.stdscr.refresh()

        self.update_active = True
        while (True):
            ch = self.stdscr.getch()

            if (ch != curses.ERR):
                # stop/start status
                if (ch == ord('f')):
                    self.update_active = not self.update_active
                    self.add_log_event("Update continued" if self.update_active else "Update stopped")

                elif (ch == ord('p')):
                    self.add_log_event("Pinging RPC server")
                    rc, msg = self.rpc_client.ping_rpc_server()
                    if rc:
                        self.add_log_event("Server replied")
                    else:
                        self.add_log_event("Failed to get reply")
                    
                # c - clear stats
                elif (ch == ord('c')):
                    self.add_log_event("Statistics cleared")

                elif (ch == ord('q')):
                    break
                else:
                    self.add_log_event("Unknown key pressed {0}".format("'" + chr(ch) + "'" if chr(ch).isalpha() else ""))

            self.update_control()
            self.update_info()

            panel.update_panels(); 
            self.stdscr.refresh()
            sleep(0.2)


def show_trex_status_internal (stdscr, rpc_client):
    trex_status = TrexStatus(stdscr, rpc_client)
    trex_status.run()

def show_trex_status (rpc_client):

    try:
        curses.wrapper(show_trex_status_internal, rpc_client)
    except KeyboardInterrupt:
        curses.endwin()

def cleanup ():
    try:
        curses.endwin()
    except:
        pass