#!/usr/bin/env python

import os
from pathlib import Path
import re
import sys

import click

from ordigi import constants, log, LOG
from ordigi.collection import Collection
from ordigi.geolocation import GeoLocation

_logger_options = [
    click.option(
        '--verbose',
        '-v',
        default='WARNING',
        help='True if you want to see details of file processing',
    ),
]

_input_options = [
    click.option(
        '--interactive', '-i', default=False, is_flag=True, help="Interactive mode"
    ),
]

_dry_run_options = [
    click.option(
        '--dry-run',
        default=False,
        is_flag=True,
        help='Dry run only, no change made to the filesystem.',
    )
]

_filter_options = [
    click.option(
        '--exclude',
        '-E',
        default=None,
        multiple=True,
        help='Directories or files to exclude.',
    ),
    click.option(
        '--ext',
        '-e',
        default=None,
        multiple=True,
        help="""Use filename
            extension to filter files for sorting. If value is '*', use
            common media file extension for filtering. Ignored files remain in
            the same directory structure""",
    ),
    click.option(
        '--ignore-tags',
        '-I',
        default=None,
        multiple=True,
        help='Specific tags or group that will be ignored when\
                  searching for file data. Example \'File:FileModifyDate\' or \'Filename\'',
    ),
    click.option('--glob', '-g', default='**/*', help='Glob file selection'),
]


_sort_options = [
    click.option(
        '--album-from-folder',
        default=False,
        is_flag=True,
        help="Use images' folders as their album names.",
    ),
    click.option(
        '--path-format',
        '-p',
        default=constants.DEFAULT_PATH_FORMAT,
        help='Custom featured path format',
    ),
    click.option(
        '--remove-duplicates',
        '-R',
        default=False,
        is_flag=True,
        help='True to remove files that are exactly the same in name\
                          and a file hash',
    ),
    click.option(
        '--use-date-filename',
        '-f',
        default=False,
        is_flag=True,
        help="Use filename date for media original date.",
    ),
    click.option(
       '--use-file-dates',
        '-F',
        default=False,
        is_flag=True,
        help="Use file date created or modified for media original date.",
    ),
]

def print_help(command):
    click.echo(command.get_help(click.Context(command)))


def add_options(options):
    def _add_options(func):
        for option in reversed(options):
            func = option(func)
        return func

    return _add_options


def _get_paths(paths, root):
    root = Path(root).expanduser().absolute()
    if not paths:
        paths = {root}
    else:
        paths = set()
        for path in paths:
            paths.add(Path(path).expanduser().absolute())

    return paths, root


@click.command('check')
@add_options(_logger_options)
@click.argument('path', required=True, nargs=1, type=click.Path())
def _check(**kwargs):
    """
    Check media collection.
    """
    root = Path(kwargs['path']).expanduser().absolute()

    log_level = log.get_level(kwargs['verbose'])
    log.console(LOG, level=log_level)

    collection = Collection(root)
    result = collection.check_db()
    if result:
        summary = collection.check_files()
        if log_level < 30:
            summary.print()
        if summary.errors:
            sys.exit(1)
    else:
        LOG.logger.error('Db data is not accurate run `ordigi update`')
        sys.exit(1)


@click.command('clean')
@add_options(_logger_options)
@add_options(_dry_run_options)
@add_options(_filter_options)
@click.option(
    '--dedup-regex',
    '-d',
    default=None,
    multiple=True,
    help='Regex to match duplicate strings parts',
)
@click.option(
    '--delete-excluded', '-d', default=False, is_flag=True, help='Remove excluded files'
)
@click.option(
    '--folders', '-f', default=False, is_flag=True, help='Remove empty folders'
)
@click.option(
    '--path-string', '-p', default=False, is_flag=True, help='Deduplicate path string'
)
@click.option(
    '--remove-duplicates',
    '-R',
    default=False,
    is_flag=True,
    help='True to remove files that are exactly the same in name and a file hash',
)
@click.argument('subdirs', required=False, nargs=-1, type=click.Path())
@click.argument('collection', required=True, nargs=1, type=click.Path())
def _clean(**kwargs):
    """Remove empty folders"""

    dry_run = kwargs['dry_run']
    folders = kwargs['folders']
    log_level = log.get_level(kwargs['verbose'])
    log.console(LOG, level=log_level)

    subdirs = kwargs['subdirs']
    root = kwargs['collection']
    paths, root = _get_paths(subdirs, root)

    collection = Collection(
        root,
        dry_run=dry_run,
        exclude=kwargs['exclude'],
        extensions=kwargs['ext'],
        glob=kwargs['glob'],
    )

    # TODO
    # summary = collection.sort_files(
    #     paths, remove_duplicates=kwargs['remove_duplicates']
    # )

    if kwargs['path_string']:
        dedup_regex = set(kwargs['dedup_regex'])
        collection.dedup_path(
            paths, dedup_regex, kwargs['remove_duplicates']
        )

    for path in paths:
        if folders:
            collection.remove_empty_folders(path)

        if kwargs['delete_excluded']:
            collection.remove_excluded_files()

    summary = collection.summary

    if log_level < 30:
        summary.print()

    if summary.errors:
        sys.exit(1)


@click.command('compare')
@add_options(_logger_options)
@add_options(_dry_run_options)
@add_options(_filter_options)
@click.option('--find-duplicates', '-f', default=False, is_flag=True)
@click.option('--remove-duplicates', '-r', default=False, is_flag=True)
@click.option(
    '--similar-to',
    '-s',
    default=False,
    help='Similar to given image',
)
@click.option(
    '--similarity',
    '-S',
    default=80,
    help='Similarity level for images',
)
@click.argument('subdirs', required=False, nargs=-1, type=click.Path())
@click.argument('collection', required=True, nargs=1, type=click.Path())
def _compare(**kwargs):
    """
    Sort similar images in directories
    """

    dry_run = kwargs['dry_run']
    subdirs = kwargs['subdirs']
    root = kwargs['collection']

    log_level = log.get_level(kwargs['verbose'])
    log.console(LOG, level=log_level)
    paths, root = _get_paths(subdirs, root)

    collection = Collection(
        root,
        exclude=kwargs['exclude'],
        extensions=kwargs['ext'],
        glob=kwargs['glob'],
        dry_run=dry_run,
    )

    for path in paths:
        collection.sort_similar_images(path, kwargs['similarity'])

    summary = collection.summary

    if log_level < 30:
        summary.print()

    if summary.errors:
        sys.exit(1)


@click.command('init')
@add_options(_logger_options)
@click.argument('path', required=True, nargs=1, type=click.Path())
def _init(**kwargs):
    """
    Init media collection database.
    """
    root = Path(kwargs['path']).expanduser().absolute()
    log_level = log.get_level(kwargs['verbose'])
    log.console(LOG, level=log_level)

    collection = Collection(root)

    # TODO retrieve collection.opt
    geocoder='Nominatim'
    prefer_english_names=False
    timeout=1
    loc = GeoLocation(geocoder, prefer_english_names, timeout)

    summary = collection.init(loc)

    if log_level < 30:
        summary.print()


@click.command('import')
@add_options(_logger_options)
@add_options(_input_options)
@add_options(_dry_run_options)
@add_options(_filter_options)
@add_options(_sort_options)
@click.option(
    '--copy',
    '-c',
    default=False,
    is_flag=True,
    help='True if you want files to be copied over from src_dir to\
              dest_dir rather than moved',
)
@click.argument('src', required=False, nargs=-1, type=click.Path())
@click.argument('dest', required=True, nargs=1, type=click.Path())
def _import(**kwargs):
    """Sort files or directories by reading their EXIF and organizing them
    according to ordigi.conf preferences.
    """
    log_level = log.get_level(kwargs['verbose'])
    log.console(LOG, level=log_level)

    src_paths, root = _get_paths(kwargs['src'], kwargs['dest'])

    if kwargs['copy']:
        import_mode = 'copy'
    else:
        import_mode = 'move'

    collection = Collection(
        root,
        kwargs['album_from_folder'],
        False,
        kwargs['dry_run'],
        kwargs['exclude'],
        kwargs['ext'],
        kwargs['glob'],
        kwargs['interactive'],
        kwargs['ignore_tags'],
        kwargs['use_date_filename'],
        kwargs['use_file_dates'],
    )

    # TODO retrieve collection.opt
    # Use loc function
    geocoder='Nominatim'
    prefer_english_names=False
    timeout=1
    loc = GeoLocation(geocoder, prefer_english_names, timeout)

    summary = collection.sort_files(
        src_paths, kwargs['path_format'], loc, import_mode, kwargs['remove_duplicates']
    )

    if log_level < 30:
        summary.print()

    if summary.errors:
        sys.exit(1)

@click.command('sort')
@add_options(_logger_options)
@add_options(_input_options)
@add_options(_dry_run_options)
@add_options(_filter_options)
@add_options(_sort_options)
@click.option('--clean', '-C', default=False, is_flag=True, help='Clean empty folders')
@click.option(
    '--reset-cache',
    '-r',
    default=False,
    is_flag=True,
    help='Regenerate the hash.json and location.json database ',
)
@click.argument('subdirs', required=False, nargs=-1, type=click.Path())
@click.argument('dest', required=True, nargs=1, type=click.Path())
def _sort(**kwargs):
    """Sort files or directories by reading their EXIF and organizing them
    according to ordigi.conf preferences.
    """
    log_level = log.get_level(kwargs['verbose'])
    log.console(LOG, level=log_level)

    paths, root = _get_paths(kwargs['subdirs'], kwargs['dest'])

    cache = not kwargs['reset_cache']

    collection = Collection(
        root,
        kwargs['album_from_folder'],
        cache,
        kwargs['dry_run'],
        kwargs['exclude'],
        kwargs['ext'],
        kwargs['glob'],
        kwargs['interactive'],
        kwargs['ignore_tags'],
        kwargs['use_date_filename'],
        kwargs['use_file_dates'],
    )

    # TODO retrieve collection.opt
    geocoder='Nominatim'
    prefer_english_names=False
    timeout=1
    loc = GeoLocation(geocoder, prefer_english_names, timeout)

    summary = collection.sort_files(
        paths, kwargs['path_format'], loc, kwargs['remove_duplicates']
    )

    if kwargs['clean']:
        collection.remove_empty_folders(root)

    if log_level < 30:
        summary.print()

    if summary.errors:
        sys.exit(1)


@click.command('update')
@add_options(_logger_options)
@click.argument('path', required=True, nargs=1, type=click.Path())
def _update(**kwargs):
    """
    Update media collection database.
    """
    root = Path(kwargs['path']).expanduser().absolute()
    log_level = log.get_level(kwargs['verbose'])
    log.console(LOG, level=log_level)

    geocoder='Nominatim'
    prefer_english_names=False
    timeout=1
    loc = GeoLocation(geocoder, prefer_english_names, timeout)
    collection = Collection(root)
    summary = collection.update(loc)

    if log_level < 30:
        summary.print()


@click.group()
def main(**kwargs):
    pass


main.add_command(_clean)
main.add_command(_check)
main.add_command(_compare)
main.add_command(_init)
main.add_command(_import)
main.add_command(_sort)
main.add_command(_update)