"""
This file contains the automatic admin site definitions for the downloads models.
"""
import datetime
import os.path

from django.contrib import admin

from downloads.models import PendingDownload
from downloads.models import Download
from downloads.models import Category
from downloads.models import AllowedExtension
from downloads.models import VoteRecord
# TODO: In Django 1.5 this will be available in django.utils.text:
from django.template.defaultfilters import slugify


def rename_download(dl):
    """Rename the download's file to a slugified version of the title."""

    head, tail = os.path.split(dl.file.name)
    ext = os.path.splitext(tail)[1]
    slug_name = slugify(dl.title) + ext
    new_name = os.path.join(head, slug_name)

    head, tail = os.path.split(dl.file.path)
    new_path = os.path.join(head, slug_name)

    os.rename(dl.file.path, new_path)
    dl.file.name = new_name


class CategoryAdmin(admin.ModelAdmin):
    list_display = ('title', 'slug', 'description', 'count')
    prepopulated_fields = {'slug': ('title', )}
    readonly_fields = ('count', )


class PendingDownloadAdmin(admin.ModelAdmin):
    exclude = ('html', )
    list_display = ('title', 'user', 'category', 'date_added', 'ip_address', 'size')
    ordering = ('date_added', )
    raw_id_fields = ('user', )
    readonly_fields = ('update_date', )

    actions = ('approve_downloads', )

    def approve_downloads(self, request, qs):
        for pending_dl in qs:
            # make a new Download from the existing PendingDownload
            dl = Download(
                    title=pending_dl.title,
                    category=pending_dl.category,
                    description=pending_dl.description,
                    html=pending_dl.html,
                    file=pending_dl.file,
                    user=pending_dl.user,
                    date_added=datetime.datetime.now(),
                    ip_address=pending_dl.ip_address,
                    hits=0,
                    average_score=0.0,
                    total_votes=0,
                    is_public=True)
            rename_download(dl)
            dl.save()

            # If we don't do this, the actual file will be deleted when
            # the pending download is deleted.
            pending_dl.file = None
            pending_dl.delete()

    approve_downloads.short_description = "Approve selected downloads"


class DownloadAdmin(admin.ModelAdmin):
    exclude = ('html', )
    list_display = ('title', 'user', 'category', 'date_added', 'ip_address',
               'hits', 'average_score', 'size', 'is_public')
    list_filter = ('date_added', 'is_public', 'category')
    list_editable = ('is_public', )
    date_hierarchy = 'date_added'
    ordering = ('-date_added', )
    search_fields = ('title', 'description', 'user__username')
    raw_id_fields = ('user', )
    readonly_fields = ('update_date', )
    save_on_top = True


class VoteRecordAdmin(admin.ModelAdmin):
    list_display = ('user', 'download', 'vote_date')
    list_filter = ('user', 'download')
    date_hierarchy = 'vote_date'


admin.site.register(PendingDownload, PendingDownloadAdmin)
admin.site.register(Download, DownloadAdmin)
admin.site.register(Category, CategoryAdmin)
admin.site.register(AllowedExtension)
admin.site.register(VoteRecord, VoteRecordAdmin)