#!/usr/bin/env python3
import time
import sys
import random
from glob import glob
from threading import Thread
from typing import Union, List, Mapping
from pygame import mixer

from atmorepl import AtmoReplRunner

VERBOSITY = 0


class SoundCollection:
    def __init__(
        self, name, files: Union[List[str], Mapping[str, List[str]]], volume=0.5
    ):
        self.name = name
        self.topics = files.keys() if hasattr(files, "keys") else []
        if self.topics:
            self.files = files
        else:
            self.files = {"None": files}
        self.flat_files = [f for topic in self.files for f in self.files[topic]]
        self.volume = volume
        self.cur_topic = None
        self.load_all_files()
        self.sound_indices = {name: 0 for name in self.sounds}
        self.flat_sound_index = 0

    def load_all_files(self):
        self.sounds = {}
        if self.topics:
            for t in self.topics:
                self.load_topic_files(t)
        else:
            self.load_topic_files("None")
        self.flat_sounds = [s for topic in self.sounds for s in self.sounds[topic]]
        random.shuffle(self.flat_sounds)

    def load_topic_files(self, topic):
        self.sounds[topic] = []
        for f in self.files[topic]:
            sound = mixer.Sound(f)
            sound.set_volume(self.volume)
            self.sounds[topic].append(sound)
        random.shuffle(self.sounds[topic])

    def next(self):
        if self.cur_topic is None:
            if len(self.flat_sounds) == 0:
                return
            self.flat_sound_index += 1
            if self.flat_sound_index >= len(self.flat_sounds):
                random.shuffle(self.flat_sounds)
                self.flat_sound_index = 0
            return self.flat_sounds[self.flat_sound_index]
        else:
            if len(self.sounds[self.cur_topic]) == 0:
                return
            self.sound_indices[self.cur_topic] += 1
            if self.sound_indices[self.cur_topic] >= len(self.sounds[self.cur_topic]):
                random.shuffle(self.sounds[self.cur_topic])
                self.sound_indices[self.cur_topic] = 0
            return self.sounds[self.cur_topic][self.sound_indices[self.cur_topic]]

    def set_topic(self, topic=None):
        if self.topics:
            self.cur_topic = topic

    def __len__(self):
        if self.cur_topic is None:
            return len(self.flat_sounds)
        else:
            return len(self.sounds[self.cur_topic])


class CampAtmo:
    tracks_per_type = 2
    single_track_types = ["lines"]
    background_track_types = ["background", "buzzwords"]
    lines_delta_sec = (5, 15)
    line_reaction_wait_sec = 0.8

    def __init__(self):
        self.stopped = False
        mixer.init(frequency=22050 * 2)
        self.load_sounds()

    def start(self):
        self.background_thread = Thread(
            None, self.run_forever, "atmo-background", daemon=True
        )
        self.background_thread.start()
        self.lines_thread = Thread(
            None, self.run_lines_forever, "atmo-lines", daemon=True
        )
        self.lines_thread.start()

    def stop():
        self.stopped = True
        self.lines_thread.join(2)
        self.background_thread.join(0.5)

    def load_sounds(self):
        type_names = glob("samples/*/")
        type_files = {}
        for type_dir in type_names:
            type_name = type_dir.split("/")[1]
            flat_files = glob(type_dir + "/*.ogg")
            type_files[type_name] = flat_files
            topic_files = glob(type_dir + "/*/*.ogg")
            if topic_files:
                type_files[type_name] = {}
                for topic_dir in glob(type_dir + "/*/"):
                    topic_name = topic_dir.split("/")[2]
                    type_files[type_name][topic_name] = glob(type_dir + "/*/*.ogg")
        self.types = {}
        i = 0
        mixer.set_num_channels(
            sum(
                [
                    1 if name in self.single_track_types else self.tracks_per_type
                    for name in type_files
                ]
            )
        )
        v(f"{mixer.get_num_channels()} channels set")
        for name in type_files:
            self.types[name] = []
            for k in range(
                1 if name in self.single_track_types else self.tracks_per_type
            ):
                self.types[name].append(mixer.Channel(i))
                i += 1
        self.sounds = {}
        for name, files in type_files.items():
            self.sounds[name] = SoundCollection(
                name, files, volume=0.1 if name in self.background_track_types else 0.9
            )

    def manage_background_queue(self, name, type_channels):
        for c in type_channels:
            if c.get_queue() is not None and len(self.sounds[name]) > 1:
                continue
            v(name)
            c.queue(self.sounds[name].next())
            if c.get_queue() is None and len(self.sounds[name]) > 1:
                c.queue(self.sounds[name].next())

    def run_forever(self):
        while not self.stopped:
            for name, type_channels in self.types.items():
                if (
                    name not in self.background_track_types
                    or len(self.sounds[name]) == 0
                ):
                    continue
                self.manage_background_queue(name, type_channels)
            time.sleep(1)
            self.load_sounds()

    def play_type_sounds(self, type_name) -> int:
        if len(self.sounds[type_name]) == 0:
            return
        max_sound_length = 0
        for channel in self.types[type_name]:
            sound = self.sounds[type_name].next()
            max_sound_length = max(max_sound_length, sound.get_length())
            channel.queue(sound)
        return max_sound_length

    def run_lines_forever(self):
        while not self.stopped:
            time.sleep(random.randrange(*self.lines_delta_sec))
            length_sec = self.play_type_sounds("lines")
            time.sleep(length_sec + self.line_reaction_wait_sec)
            self.play_type_sounds("reactions")


def main():
    atmo = CampAtmo()
    atmoRepl = AtmoReplRunner(atmo, port=7723)
    atmoRepl.start()
    atmo.start()
    try:
        while True:
            time.sleep(100)
    except KeyboardInterrupt:
        print("exiting...")
        atmo.stop()
        sys.exit(0)


def v(*msg):
    if VERBOSITY >= 1:
        print(*msg)


if __name__ == "__main__":
    main()