# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4


from datetime import datetime
import os
import shutil
import time

import ox

from changelog import Changelog
from item.models import File
from user.models import List
from utils import remove_empty_folders
from websocket import trigger_event
import db
import media
import settings
import state

import logging
logger = logging.getLogger(__name__)

extensions = ['epub', 'pdf', 'txt', 'cbr', 'cbz']

def remove_missing():
    dirty = False
    with db.session():
        prefs = settings.preferences
        prefix = os.path.join(os.path.expanduser(prefs['libraryPath']), 'Books' + os.sep)
        if os.path.exists(prefix):
            for f in File.query:
                if not state.tasks.connected:
                    return
                if f.item:
                    path = f.item.get_path()
                    if not os.path.exists(path):
                        dirty = True
                        f.item.remove_file()
                else:
                    state.db.session.delete(f)
                    dirty = True
            if dirty:
                state.db.session.commit()
            for f in File.query:
                if not state.tasks.connected:
                    return
                f.move()
            remove_empty_folders(prefix, True)

def add_file(id, f, prefix, from_=None):
    user = state.user()
    path = f[len(prefix):]
    data = media.metadata(f, from_)
    file = File.get_or_create(id, data, path)
    item = file.item
    item.add_user(user)
    item.added = datetime.utcnow()
    item.load_metadata()
    Changelog.record(user, 'additem', item.id, file.info)
    Changelog.record(user, 'edititem', item.id, item.meta)
    item.update_icons()
    item.modified = datetime.utcnow()
    item.update()
    return file

def run_scan():
    remove_missing()
    prefs = settings.preferences
    prefix = os.path.join(os.path.expanduser(prefs['libraryPath']), 'Books' + os.sep)
    if not prefix[-1] == os.sep:
        prefix += os.sep
    assert isinstance(prefix, str)
    books = []
    for root, folders, files in os.walk(prefix):
        for f in files:
            if not state.tasks.connected:
                return
            #if f.startswith('._') or f == '.DS_Store':
            if f.startswith('.'):
                continue
            f = os.path.join(root, f)
            ext = f.split('.')[-1]
            if ext == 'kepub':
                ext = 'epub'
            if ext in extensions:
                books.append(f)

    position = 0
    added = 0
    for f in ox.sorted_strings(books):
        if not state.tasks.connected:
            return
        position += 1
        with db.session():
            id = media.get_id(f)
            file = File.get(id)
            if not file:
                file = add_file(id, f, prefix, f)
                added += 1
                trigger_event('change', {})

def run_import(options=None):
    options = options or {}

    logger.debug('run_import')
    prefs = settings.preferences
    prefix = os.path.expanduser(options.get('path', prefs['importPath']))
    if os.path.islink(prefix):
        prefix = os.path.realpath(prefix)
    if not prefix[-1] == os.sep:
        prefix += os.sep
    prefix_books = os.path.join(os.path.expanduser(prefs['libraryPath']), 'Books' + os.sep)
    prefix_imported = os.path.join(prefix_books, 'Imported' + os.sep)
    if prefix_books.startswith(prefix) or prefix.startswith(prefix_books):
        error = 'invalid path'
    elif not os.path.exists(prefix):
        error = 'path not found'
    elif not os.path.isdir(prefix):
        error = 'path must be a folder'
    else:
        error = None
    if error:
        trigger_event('activity', {
            'activity': 'import',
            'progress': [0, 0],
            'status': {'code': 404, 'text': error}
        })
        state.activity = {}
        return
    listname = options.get('list')
    if listname:
        listitems = []
    assert isinstance(prefix, str)
    books = []
    count = 0
    for root, folders, files in os.walk(prefix):
        for f in files:
            if not state.tasks.connected:
                return
            #if f.startswith('._') or f == '.DS_Store':
            if f.startswith('.'):
                continue
            f = os.path.join(root, f)
            ext = f.split('.')[-1]
            if ext in extensions:
                books.append(f)
                count += 1
                if state.activity.get('cancel'):
                    state.activity = {}
                    return
                if count % 1000 == 0:
                    state.activity = {
                        'activity': 'import',
                        'path': prefix,
                        'progress': [0, count],
                    }
                    trigger_event('activity', state.activity)
    state.activity = {
        'activity': 'import',
        'path': prefix,
        'progress': [0, len(books)],
    }
    trigger_event('activity', state.activity)
    position = 0
    added = 0
    last = 0
    for f in ox.sorted_strings(books):
        position += 1
        if not os.path.exists(f):
            continue
        with db.session():
            id = media.get_id(f)
            file = File.get(id)
            f_import = f
            if not file:
                f = f.replace(prefix, prefix_imported)
                ox.makedirs(os.path.dirname(f))
                if options.get('mode') == 'move':
                    try:
                        shutil.move(f_import, f)
                    except:
                        shutil.copy2(f_import, f)
                else:
                    shutil.copy2(f_import, f)
                file = add_file(id, f, prefix_books, f_import)
                file.move()
                added += 1
            elif options.get('mode') == 'move':
                os.unlink(f_import)
            if listname:
                listitems.append(file.item.id)
        if time.time() - last > 5:
            last = time.time()
            state.activity = {
                'activity': 'import',
                'progress': [position, len(books)],
                'path': prefix,
                'added': added,
            }
            trigger_event('activity', state.activity)

        if state.activity.get('cancel'):
            state.activity = {}
            return
    with db.session():
        if listname and listitems:
            l = List.get(settings.USER_ID, listname)
            if l:
                l.add_items(listitems)
    trigger_event('activity', {
        'activity': 'import',
        'progress': [position, len(books)],
        'path': prefix,
        'status': {'code': 200, 'text': ''},
        'added': added,
    })
    state.activity = {}
    remove_empty_folders(prefix_books)
    if options.get('mode') == 'move':
        remove_empty_folders(prefix, True)

def import_folder():
    import_path = settings.preferences['importPath']
    logger.debug('scan importPath %s', import_path)
    if os.path.exists(import_path):
        run_import({
            'path': import_path,
            'mode': 'move'
        })
        remove_empty_folders(import_path, True)
    if state.main:
        state.main.call_later(10*60, lambda: state.tasks.queue('scanimport'))