from __future__ import absolute_import, division, print_function

import os
import glob
import re
import seiscomp.kernel
import seiscomp.config
import seiscomp.system


class Module(seiscomp.kernel.Module):
    def __init__(self, env):
        seiscomp.kernel.Module.__init__(self, env, env.moduleName(__file__))
        self.config_dir = os.path.join(self.env.SEISCOMP_ROOT, "var", "lib")
        self.log_dir = os.path.join(self.env.SEISCOMP_ROOT, "var", "log")

    def _run(self):
        if self.env.syslog:
            daemon_opt = "-s"
        else:
            daemon_opt = "--log-file " + os.path.join(
                self.log_dir, self.name + ".log"
            )

        daemon_opt += " -f " + os.path.join(
            self.config_dir, self.name + ".cfg"
        )

        prog = "run_with_lock"
        params = self.env.lockFile(self.name)

        return self.env.start(
            self.name,
            prog,
            f"{params} {self.env.binaryFile(self.name)} {daemon_opt}",
            True,
        )

    def supportsAliases(self):
        return True

    def updateConfig(self):
        bindings_dir = os.path.join(self.env.SEISCOMP_ROOT, "etc", "key")
        key_dir = os.path.join(bindings_dir, self.name)
        cfg_file = os.path.join(self.config_dir, self.name + ".cfg")
        rx_binding = re.compile(
            r"(?P<module>[A-Za-z0-9_\.-]+)(:(?P<profile>[A-Za-z0-9_-]+))?$"
        )

        files = glob.glob(os.path.join(bindings_dir, "station_*"))
        files.sort()

        try:
            fb = open(cfg_file, "w", encoding="utf-8")
        except BaseException:
            print(f"error: unable to generate configuration file '{cfg_file}'")
            return 1

        cfg = seiscomp.config.Config()

        try:
            # Defaults Global + App Cfg
            cfg.readConfig(
                os.path.join(
                    self.env.SEISCOMP_ROOT, "etc", "defaults", "global.cfg"
                )
            )
            cfg.readConfig(
                os.path.join(
                    self.env.SEISCOMP_ROOT,
                    "etc",
                    "defaults",
                    self.name + ".cfg",
                )
            )

            # Config Global + App Cfg
            cfg.readConfig(
                os.path.join(self.env.SEISCOMP_ROOT, "etc", "global.cfg")
            )
            cfg.readConfig(
                os.path.join(self.env.SEISCOMP_ROOT, "etc", self.name + ".cfg")
            )

            # User Global + App Cfg
            cfg.readConfig(
                os.path.join(os.environ["HOME"], ".seiscomp", "global.cfg")
            )
            cfg.readConfig(
                os.path.join(
                    os.environ["HOME"], ".seiscomp", self.name + ".cfg"
                )
            )
        except BaseException:
            pass

        try:
            print(f"queue_size = {cfg.getInt('queueSize')}", file=fb)
        except BaseException:
            pass

        try:
            print(
                f"backfilling_buffer_size = {cfg.getInt('backFillingBufferSize')}",
                file=fb,
            )
        except BaseException:
            pass

        # has_channel_mappings = False

        try:
            print(
                f"channels = {', '.join(cfg.getStrings('channels'))}",
                file=fb,
            )
        # has_channel_mappings = True
        except BaseException:
            pass

        try:
            default_address = cfg.getString("address")
        except BaseException:
            default_address = None

        try:
            default_sink = cfg.getString("sink")
        except BaseException:
            default_sink = None

        # units = {}

        for f in files:
            try:
                (path, net, sta) = os.path.basename(f).split("_")
                if not path.endswith("station"):
                    print("invalid path", f)

            except ValueError:
                print("invalid path", f)
                continue

            fd = open(f, encoding="utf-8")
            line = fd.readline()
            while line:
                line = line.strip()
                if not line or line[0] == "#":
                    line = fd.readline()
                    continue

                m = rx_binding.match(line)
                if not m:
                    # print("invalid binding in %s: %s" % (f, line))
                    line = fd.readline()
                    continue

                if m.group("module") != self.name:
                    line = fd.readline()
                    continue

                profile = m.group("profile")

                # Setup station net, sta, profile
                if profile:
                    binding_file = f"profile_{profile}"
                else:
                    binding_file = f"station_{net}_{sta}"

                cfg = seiscomp.config.Config()
                cfg.readConfig(os.path.join(key_dir, binding_file))
                # try:
                #     unit = cfg.getString("unit")
                # except:
                #     print("warning: unit is not defined in %s" % (binding_file))
                #     break

                # try:
                #     channels = cfg.getStrings("channels")
                # except:
                #     if not has_channel_mappings:
                #         print("warning: channel mappings are not defined in %s" % (
                #                 binding_file))
                #         break
                #     channels = None

                try:
                    address = cfg.getString("address")
                except BaseException:
                    if default_address is None:
                        print(
                            f"warning: address not defined in {binding_file}"
                        )
                        break
                    address = default_address

                try:
                    sink = cfg.getString("sink")
                except BaseException:
                    if default_sink is None:
                        print(f"warning: sink not defined in {binding_file}")
                        break
                    sink = default_sink

                # if units.has_key(unit):
                #     print("error: unit %s is bound to multiple stations "
                #           "(%s.%s, %s.%s, ...)" % (
                #               unit, units[unit][0], units[unit][1], net, sta))
                #    return 1

                # units[unit] = (net,sta)

                print(f"address {address}", file=fb)
                print(f'  network  = "{net}"', file=fb)
                print(f'  station  = "{sta}"', file=fb)
                # if not channels is None:
                #    print("  channels = %s" % ", ".join(channels), file=fb)
                print(f"  sink     = {sink}", file=fb)

                break

            fd.close()

        fb.close()

        return 0