from DataBase import *
from LocalLibraryIndexer import update_local_library
from LinkerPatternGenerator import run_pattern_generators
from LocalPLaylistGenerator import generate_playlists

from SpotifyWebAPI import fetch_data, update_access_token
import cmd

local_library_path = "/home/auser/Music/"
rel_autogen_dir = "0autogen"

playlists = get_data('playlistTracks')
top_artists = get_data('top_artists')
top_tracks = get_data('top_tracks')
user_tracks = get_data('tracks')
link_pattern = get_data('link_pattern_spotify')
local_library = get_data("local_library")
user_tracks_by_id = {track['track']['id']: track['track'] for track in user_tracks}


def get_playlist_names(pl):
    return [name for name, items in pl.items()]


def print_playlist_tracks(pl_id: int):
    pls = list(playlists)
    name = pls[pl_id]
    pl = playlists[name]
    print(name)
    for track in pl:
        track_data = track['track']
        track_name = track_data['name']
        artists = get_artists_str(track_data['artists'])
        print(f"   '{track_name}' - '{artists}' ")


def print_top_artists():
    for artist in top_artists:
        name = artist['name']
        print(f"   '{name}'")


def print_top_tracks():
    for track in top_tracks:
        track_name = track['name']
        artists = get_artists_str(track['artists'])
        print(f"   '{track_name}' - '{artists}' ")


def print_stats():
    print(f" tracks - {len(user_tracks)}")
    print(f" playlists - {len(playlists)}")

    for name, tracks in playlists.items():
        print(f"    '{name}' - {len(tracks)}")

    print(f" top tracks - {len(top_tracks)}")
    print(f" top artists - {len(top_artists)}")


def print_tracks():
    track_idx = 0
    for trackItem in user_tracks:
        track = trackItem['track']
        print(f"    {track_idx}:  '{track['name']}' by '{get_artists_str(track['artists'])}'")
        track_idx += 1


def sort_remote_tracks_by_popularity(track_ids):
    out = []
    for top_track in top_tracks:
        if top_track['id'] in track_ids:
            out.append(top_track['id'])
    return out


def print_link_stats(link_pattern):
    resolved_reversed = {}
    resolved = []
    unresolved_local = []
    unresolved_remote = []

    for local_id, links in link_pattern.items():
        if len(links['items']):
            resolved.append(local_id)
            resolved_reversed[links['items'][0]] = local_id
        else:
            unresolved_local.append(local_id)

    for track in user_tracks:
        track_id = track['track']['id']
        if track_id not in resolved_reversed:
            unresolved_remote.append(track_id)

    print(f"Local Tracks: {len(local_library)}")
    print(f"Remote Tracks: {len(user_tracks)}")

    unresolved_remote = sort_remote_tracks_by_popularity(unresolved_remote)
    unresolved_remote = unresolved_remote[0:min(len(unresolved_remote), 100)]

    print(f"\nUnresolved tracks from the remote: {len(unresolved_remote)}")
    index = 0
    for remote_id in unresolved_remote:
        remote_track = user_tracks_by_id[remote_id]
        print(f"   {index}: '{remote_track['name']}' by '{get_artists_str(remote_track['artists'])}'")
        index += 1

    print(f"\nResolved tracks: {len(resolved)}")
    index = 0
    for link in resolved:
        remote_id = link_pattern[link]['items'][0]
        local_track = local_library[link]
        remote_track = user_tracks_by_id[remote_id]

        print(f"    {index}: '{local_track['name']}' by '{local_track['artist']}'", end='  ----> ')
        print(f"'{remote_track['name']}' by '{get_artists_str(remote_track['artists'])}'")
        index += 1


class Interpreter(cmd.Cmd):
    intro = "Welcome to the interactive command loop. Type help or ? to list commands.\n"
    prompt = "(spotify) "

    def do_list_stat_vs_types(self, arg):
        """prints available linking patterns"""
        print(f"0 - fuzzy tags")
        print(f"1 - spotify")
        print(f"2 - fuzzy")

    def do_stat_local_library_vs_spotify(self, arg):
        """compares local library and remote with the link pattern generated by the generate_pattern_command"""
        print_link_stats(link_pattern)

    def do_playlists(self, arg):
        """prints user playlists"""
        pl_id = 0
        for pl in get_playlist_names(playlists):
            print(f"{pl_id} - {pl}")
            pl_id += 1

    def do_playlist_tracks(self, arg):
        """prints playlist [name]"""
        try:
            pl_id = int(arg.split()[0])
            print_playlist_tracks(pl_id)
        except IndexError:
            print("Invalid input")

    def do_top_artists(self, arg):
        """Top artists"""
        print_top_artists()

    def do_top_tracks(self, arg):
        """Top tracks"""
        print_top_tracks()

    def do_stat(self, arg):
        """Print stats"""
        print_stats()

    def do_tracks(self, arg):
        """Print tracks"""
        print_tracks()

    def do_generate_local_playlists(self, arg):
        """generates local playlists based on the vs comparison type"""
        generate_playlists(local_library, local_library_path, playlists, link_pattern, local_library_path + rel_autogen_dir)


    def do_index_local_library(self, arg):
        """find local tracks and fetches the data from them for further analysis"""
        global local_library
        update_local_library(local_library_path)
        local_library = get_data("local_library")

    def do_generate_vs_stat(self, arg):
        """compares local and remote library and generates the vs stats"""

        global link_pattern
        run_pattern_generators()
        link_pattern = get_data('link_pattern_spotify')

    def do_fetch(self, arg):
        """Fetch all spotify data"""
        try:
            update_access_token()
            fetch_data()

            global playlists, top_artists, top_tracks, user_tracks

            playlists = get_data('playlistTracks')
            top_artists = get_data('top_artists')
            top_tracks = get_data('top_tracks')
            user_tracks = get_data('tracks')

        except ValueError:
            print("Can not fetch the data.")

    def do_generate_todo(self, arg):
        """generates todos for the pirates"""
        print("sorry not implemented yet.")

    def do_run_all_default(self, arg):
        """runs general flow"""

        local_lib_path = "/home/auser/Music/"
        print("Fetching spotify data...")
        self.do_fetch([])

        print("Fetching local data...")
        self.do_index_local_library(f"{local_lib_path}/organized")

        print("Generating vs patterns...")
        self.do_generate_vs_stat("0")

        print("Generating todos...")
        self.do_generate_todo(f"{local_lib_path}")

        print("Generating local playlists...")
        self.do_generate_local_playlists(f"{local_lib_path}")

        return True

    def do_exit(self, arg):
        """Exit the command loop: exit"""
        print("Goodbye!")
        return True


if __name__ == '__main__':
    try:
        Interpreter().cmdloop()
    except KeyboardInterrupt as kb:
        print("process terminated")