import datetime, os, time
from collections import namedtuple

from ebook_converter.utils import date
from ebook_converter.customize import CatalogPlugin
from ebook_converter.customize.conversion import OptionRecommendation, DummyReporter
from ebook_converter.library import current_library_name
from ebook_converter.library.catalogs import AuthorSortMismatchException, EmptyCatalogException
from ebook_converter.ptempfile import PersistentTemporaryFile
from ebook_converter.utils.localization import langcode_to_name, canonicalize_lang, get_lang


Option = namedtuple('Option', 'option, default, dest, action, help')


class EPUB_MOBI(CatalogPlugin):

    'EPUB catalog generator'

    name = 'Catalog_EPUB_MOBI'
    description = 'AZW3/EPUB/MOBI catalog generator'
    supported_platforms = ['osx', 'linux']
    minimum_calibre_version = (0, 7, 40)
    author = 'Greg Riker'
    version = (1, 0, 0)
    file_types = {'azw3', 'epub', 'mobi'}

    THUMB_SMALLEST = "1.0"
    THUMB_LARGEST = "2.0"

    cli_options = [Option('--catalog-title',  # {{{
                          default='My Books',
                          dest='catalog_title',
                          action=None,
                          help='Title of generated catalog used as title in '
                          'metadata.\n'
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--cross-reference-authors',
                          default=False,
                          dest='cross_reference_authors',
                          action='store_true',
                          help="Create cross-references in Authors section "
                          "for books with multiple authors.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--debug-pipeline',
                          default=None,
                          dest='debug_pipeline',
                          action=None,
                          help="Save the output from different stages of the "
                          "conversion pipeline to the specified directory. "
                          "Useful if you are unsure at which stage of the "
                          "conversion process a bug is occurring.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--exclude-genre',
                          default=r'\[.+\]|^\+$',
                          dest='exclude_genre',
                          action=None,
                          help="Regex describing tags to exclude as genres.\n"
                          "Default: '%default' excludes bracketed tags, e.g. "
                          "'[Project Gutenberg]', and '+', the default tag "
                          "for read books.\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--exclusion-rules',
                          default="(('Catalogs','Tags','Catalog'),)",
                          dest='exclusion_rules',
                          action=None,
                          help="Specifies the rules used to exclude books "
                          "from the generated catalog.\n"
                          "The model for an exclusion rule is either\n"
                          "('<rule name>','Tags','<comma-separated list of "
                          "tags>') or\n"
                          "('<rule name>','<custom column>','<pattern>').\n"
                          "For example:\n"
                          "(('Archived books','#status','Archived'),)\n"
                          "will exclude a book with a value of 'Archived' in "
                          "the custom column 'status'.\n"
                          "When multiple rules are defined, all rules will be "
                          "applied.\n"
                          "Default: \n\"%default\"\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--generate-authors',
                          default=False,
                          dest='generate_authors',
                          action='store_true',
                          help="Include 'Authors' section in catalog.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--generate-descriptions',
                          default=False,
                          dest='generate_descriptions',
                          action='store_true',
                          help="Include 'Descriptions' section in catalog.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--generate-genres',
                          default=False,
                          dest='generate_genres',
                          action='store_true',
                          help="Include 'Genres' section in catalog.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--generate-titles',
                          default=False,
                          dest='generate_titles',
                          action='store_true',
                          help="Include 'Titles' section in catalog.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--generate-series',
                          default=False,
                          dest='generate_series',
                          action='store_true',
                          help="Include 'Series' section in catalog.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--generate-recently-added',
                          default=False,
                          dest='generate_recently_added',
                          action='store_true',
                          help="Include 'Recently Added' section in catalog.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--genre-source-field',
                          default='Tags',
                          dest='genre_source_field',
                          action=None,
                          help="Source field for 'Genres' section.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--header-note-source-field',
                          default='',
                          dest='header_note_source_field',
                          action=None,
                          help="Custom field containing note text to insert "
                          "in Description header.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--merge-comments-rule',
                          default='::',
                          dest='merge_comments_rule',
                          action=None,
                          help="#<custom field>:[before|after]:[True|False] "
                          "specifying:\n"
                          " <custom field> Custom field containing notes to "
                          "merge with Comments\n"
                          " [before|after] Placement of notes with respect "
                          "to Comments\n"
                          " [True|False] - A horizontal rule is inserted "
                          "between notes and Comments\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--output-profile',
                          default=None,
                          dest='output_profile',
                          action=None,
                          help="Specifies the output profile. In some cases, "
                          "an output profile is required to optimize the "
                          "catalog for the device. For example, 'kindle' or "
                          "'kindle_dx' creates a structured Table of Contents "
                          "with Sections and Articles.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--prefix-rules',
                          default="(('Read books','tags','+','\u2713'),"
                          "('Wishlist item','tags','Wishlist','\u00d7'))",
                          dest='prefix_rules',
                          action=None,
                          help="Specifies the rules used to include prefixes "
                          "indicating read books, wishlist items and other "
                          "user-specified prefixes.\n"
                          "The model for a prefix rule is ('<rule name>',"
                          "'<source field>','<pattern>','<prefix>').\n"
                          "When multiple rules are defined, the first "
                          "matching rule will be used.\n"
                          "Default:\n" + '"' + '%default' + '"' + "\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--preset',
                          default=None,
                          dest='preset',
                          action=None,
                          help="Use a named preset created with the GUI "
                          "catalog builder.\n"
                          "A preset specifies all settings for building a "
                          "catalog.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--use-existing-cover',
                          default=False,
                          dest='use_existing_cover',
                          action='store_true',
                          help="Replace existing cover when generating the "
                          "catalog.\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats"),
                   Option('--thumb-width',
                          default='1.0',
                          dest='thumb_width',
                          action=None,
                          help="Size hint (in inches) for book covers in "
                          "catalog.\n"
                          "Range: 1.0 - 2.0\n"
                          "Default: '%default'\n"
                          "Applies to: AZW3, EPUB, MOBI output formats")]
    # }}}

    def run(self, path_to_output, opts, db, notification=DummyReporter()):
        from ebook_converter.library.catalogs.epub_mobi_builder import CatalogBuilder
        from ebook_converter.utils.logging import default_log as log
        from ebook_converter.utils.config import JSONConfig

        # If preset specified from the cli, insert stored options from JSON file
        if hasattr(opts, 'preset') and opts.preset:
            available_presets = JSONConfig("catalog_presets")
            if opts.preset not in available_presets:
                if available_presets:
                    print('Error: Preset "%s" not found.' % opts.preset)
                    print('Stored presets: %s' %
                          ', '.join([p for p in
                                     sorted(available_presets.keys())]))
                else:
                    print('Error: No stored presets.')
                return 1

            # Copy the relevant preset values to the opts object
            for item in available_presets[opts.preset]:
                if item not in ['exclusion_rules_tw', 'format', 'prefix_rules_tw']:
                    setattr(opts, item, available_presets[opts.preset][item])

            # Provide an unconnected device
            opts.connected_device = {
                         'is_device_connected': False,
                         'kind': None,
                         'name': None,
                         'save_template': None,
                         'serial': None,
                         'storage': None,
                        }

            # Convert prefix_rules and exclusion_rules from JSON lists to tuples
            prs = []
            for rule in opts.prefix_rules:
                prs.append(tuple(rule))
            opts.prefix_rules = tuple(prs)

            ers = []
            for rule in opts.exclusion_rules:
                ers.append(tuple(rule))
            opts.exclusion_rules = tuple(ers)

        opts.log = log
        opts.fmt = self.fmt = path_to_output.rpartition('.')[2]

        # Add local options
        opts.creator = '%s, %s %s, %s' % (date.strftime('%A'), date.strftime('%B'), date.strftime('%d').lstrip('0'), date.strftime('%Y'))
        opts.creator_sort_as = '%s %s' % ('calibre', date.strftime('%Y-%m-%d'))
        opts.connected_kindle = False

        # Finalize output_profile
        op = opts.output_profile
        if op is None:
            op = 'default'

        if opts.connected_device['name'] and 'kindle' in opts.connected_device['name'].lower():
            opts.connected_kindle = True
            if opts.connected_device['serial'] and \
               opts.connected_device['serial'][:4] in ['B004', 'B005']:
                op = "kindle_dx"
            else:
                op = "kindle"

        opts.description_clip = 380 if op.endswith('dx') or 'kindle' not in op else 100
        opts.author_clip = 100 if op.endswith('dx') or 'kindle' not in op else 60
        opts.output_profile = op

        opts.basename = "Catalog"
        opts.cli_environment = not hasattr(opts, 'sync')

        # Hard-wired to always sort descriptions by author, with series after non-series
        opts.sort_descriptions_by_author = True

        build_log = []

        build_log.append("%s('%s'): Generating %s %sin %s environment, locale: '%s'" %
            (self.name,
             current_library_name(),
             self.fmt,
             'for %s ' % opts.output_profile if opts.output_profile else '',
             'CLI' if opts.cli_environment else 'GUI',
             langcode_to_name(canonicalize_lang(get_lang()), localize=False))
             )

        # If exclude_genre is blank, assume user wants all tags as genres
        if opts.exclude_genre.strip() == '':
            # opts.exclude_genre = '\[^.\]'
            # build_log.append(" converting empty exclude_genre to '\[^.\]'")
            opts.exclude_genre = 'a^'
            build_log.append(" converting empty exclude_genre to 'a^'")
        if opts.connected_device['is_device_connected'] and \
           opts.connected_device['kind'] == 'device':
            if opts.connected_device['serial']:
                build_log.append(" connected_device: '%s' #%s%s " %
                    (opts.connected_device['name'],
                     opts.connected_device['serial'][0:4],
                     'x' * (len(opts.connected_device['serial']) - 4)))
                for storage in opts.connected_device['storage']:
                    if storage:
                        build_log.append("  mount point: %s" % storage)
            else:
                build_log.append(" connected_device: '%s'" % opts.connected_device['name'])
                try:
                    for storage in opts.connected_device['storage']:
                        if storage:
                            build_log.append("  mount point: %s" % storage)
                except:
                    build_log.append("  (no mount points)")
        else:
            build_log.append(" connected_device: '%s'" % opts.connected_device['name'])

        opts_dict = vars(opts)
        if opts_dict['ids']:
            build_log.append(" book count: %d" % len(opts_dict['ids']))

        sections_list = []
        if opts.generate_authors:
            sections_list.append('Authors')
        if opts.generate_titles:
            sections_list.append('Titles')
        if opts.generate_series:
            sections_list.append('Series')
        if opts.generate_genres:
            sections_list.append('Genres')
        if opts.generate_recently_added:
            sections_list.append('Recently Added')
        if opts.generate_descriptions:
            sections_list.append('Descriptions')

        if not sections_list:
            if opts.cli_environment:
                opts.log.warn('*** No Section switches specified, enabling all Sections ***')
                opts.generate_authors = True
                opts.generate_titles = True
                opts.generate_series = True
                opts.generate_genres = True
                opts.generate_recently_added = True
                opts.generate_descriptions = True
                sections_list = ['Authors', 'Titles', 'Series', 'Genres', 'Recently Added', 'Descriptions']
            else:
                opts.log.warn('\n*** No enabled Sections, terminating catalog generation ***')
                return ["No Included Sections", "No enabled Sections.\nCheck E-book options tab\n'Included sections'\n"]
        if opts.fmt == 'mobi' and sections_list == ['Descriptions']:
            warning = ("\n*** Adding 'By authors' section required for MOBI "
                       "output ***")
            opts.log.warn(warning)
            sections_list.insert(0, 'Authors')
            opts.generate_authors = True

        opts.log(" Sections: %s" % ', '.join(sections_list))
        opts.section_list = sections_list

        # Limit thumb_width to 1.0" - 2.0"
        try:
            if float(opts.thumb_width) < float(self.THUMB_SMALLEST):
                log.warning("coercing thumb_width from '%s' to '%s'" % (opts.thumb_width, self.THUMB_SMALLEST))
                opts.thumb_width = self.THUMB_SMALLEST
            if float(opts.thumb_width) > float(self.THUMB_LARGEST):
                log.warning("coercing thumb_width from '%s' to '%s'" % (opts.thumb_width, self.THUMB_LARGEST))
                opts.thumb_width = self.THUMB_LARGEST
            opts.thumb_width = "%.2f" % float(opts.thumb_width)
        except:
            log.error("coercing thumb_width from '%s' to '%s'" % (opts.thumb_width, self.THUMB_SMALLEST))
            opts.thumb_width = "1.0"

        # eval prefix_rules if passed from command line
        if type(opts.prefix_rules) is not tuple:
            try:
                opts.prefix_rules = eval(opts.prefix_rules)
            except:
                log.error("malformed --prefix-rules: %s" % opts.prefix_rules)
                raise
            for rule in opts.prefix_rules:
                if len(rule) != 4:
                    log.error("incorrect number of args for --prefix-rules: %s" % repr(rule))

        # eval exclusion_rules if passed from command line
        if type(opts.exclusion_rules) is not tuple:
            try:
                opts.exclusion_rules = eval(opts.exclusion_rules)
            except:
                log.error("malformed --exclusion-rules: %s" % opts.exclusion_rules)
                raise
            for rule in opts.exclusion_rules:
                if len(rule) != 3:
                    log.error("incorrect number of args for --exclusion-rules: %s" % repr(rule))

        # Display opts
        keys = sorted(opts_dict.keys())
        build_log.append(" opts:")
        for key in keys:
            if key in ['catalog_title', 'author_clip', 'connected_kindle', 'creator',
                       'cross_reference_authors', 'description_clip', 'exclude_book_marker',
                       'exclude_genre', 'exclude_tags', 'exclusion_rules', 'fmt',
                       'genre_source_field', 'header_note_source_field', 'merge_comments_rule',
                       'output_profile', 'prefix_rules', 'preset', 'read_book_marker',
                       'search_text', 'sort_by', 'sort_descriptions_by_author', 'sync',
                       'thumb_width', 'use_existing_cover', 'wishlist_tag']:
                build_log.append("  %s: %s" % (key, repr(opts_dict[key])))
        if opts.verbose:
            log('\n'.join(line for line in build_log))

        # Capture start_time
        opts.start_time = time.time()

        self.opts = opts

        if opts.verbose:
            log.info(" Begin catalog source generation (%s)" %
                     str(datetime.timedelta(seconds=int(time.time() - opts.start_time))))

        # Launch the Catalog builder
        catalog = CatalogBuilder(db, opts, self, report_progress=notification)

        try:
            catalog.build_sources()
            if opts.verbose:
                log.info(" Completed catalog source generation (%s)\n"  %
                         str(datetime.timedelta(seconds=int(time.time() - opts.start_time))))
        except (AuthorSortMismatchException, EmptyCatalogException) as e:
            log.error(" *** Terminated catalog generation: %s ***" % e)
        except:
            log.error(" unhandled exception in catalog generator")
            raise

        else:
            recommendations = []
            recommendations.append(('remove_fake_margins', False,
                OptionRecommendation.HIGH))
            recommendations.append(('comments', '', OptionRecommendation.HIGH))

            """
            >>> Use to debug generated catalog code before pipeline conversion <<<
            """
            GENERATE_DEBUG_EPUB = False
            if GENERATE_DEBUG_EPUB:
                catalog_debug_path = os.path.join(os.path.expanduser('~'), 'Desktop', 'Catalog debug')
                setattr(opts, 'debug_pipeline', os.path.expanduser(catalog_debug_path))

            dp = getattr(opts, 'debug_pipeline', None)
            if dp is not None:
                recommendations.append(('debug_pipeline', dp,
                    OptionRecommendation.HIGH))

            if opts.output_profile and opts.output_profile.startswith("kindle"):
                recommendations.append(('output_profile', opts.output_profile,
                    OptionRecommendation.HIGH))
                recommendations.append(('book_producer', opts.output_profile,
                    OptionRecommendation.HIGH))
                if opts.fmt == 'mobi':
                    recommendations.append(('no_inline_toc', True,
                        OptionRecommendation.HIGH))
                    recommendations.append(('verbose', 2,
                        OptionRecommendation.HIGH))

            # Use existing cover or generate new cover
            cpath = None
            existing_cover = False
            try:
                search_text = 'title:"%s" author:%s' % (
                        opts.catalog_title.replace('"', '\\"'), 'calibre')
                matches = db.search(search_text, return_matches=True, sort_results=False)
                if matches:
                    cpath = db.cover(matches[0], index_is_id=True, as_path=True)
                    if cpath and os.path.exists(cpath):
                        existing_cover = True
            except:
                pass

            if self.opts.use_existing_cover and not existing_cover:
                log.warning("no existing catalog cover found")

            if self.opts.use_existing_cover and existing_cover:
                recommendations.append(('cover', cpath, OptionRecommendation.HIGH))
                log.info("using existing catalog cover")
            else:
                # TODO(gryf): feature: generating cover with pillow.
                pass
                # from ebook_converter.ebooks.covers import calibre_cover2
                # log.info("replacing catalog cover")
                # new_cover_path = PersistentTemporaryFile(suffix='.jpg')
                # # new_cover = calibre_cover2(opts.catalog_title, 'calibre')
                # new_cover_path.write('')
                # new_cover_path.close()
                # recommendations.append(('cover', new_cover_path.name, OptionRecommendation.HIGH))

            # Run ebook-convert
            from ebook_converter.ebooks.conversion.plumber import Plumber
            plumber = Plumber(os.path.join(catalog.catalog_path, opts.basename + '.opf'),
                            path_to_output, log, report_progress=notification,
                            abort_after_input_dump=False)
            plumber.merge_ui_recommendations(recommendations)
            plumber.run()

            try:
                os.remove(cpath)
            except:
                pass

            if GENERATE_DEBUG_EPUB:
                from ebook_converter.ebooks.epub import initialize_container
                from ebook_converter.ebooks.tweak import zip_rebuilder
                from ebook_converter.utils.zipfile import ZipFile
                input_path = os.path.join(catalog_debug_path, 'input')
                epub_shell = os.path.join(catalog_debug_path, 'epub_shell.zip')
                initialize_container(epub_shell, opf_name='content.opf')
                with ZipFile(epub_shell, 'r') as zf:
                    zf.extractall(path=input_path)
                os.remove(epub_shell)
                zip_rebuilder(input_path, os.path.join(catalog_debug_path, 'input.epub'))

            if opts.verbose:
                log.info(" Catalog creation complete (%s)\n" %
                     str(datetime.timedelta(seconds=int(time.time() - opts.start_time))))

        # returns to gui2.actions.catalog:catalog_generated()
        return catalog.error