from django import forms

from django.contrib import admin

from django.contrib.auth.models import User

# EP
from django.conf import settings

from common.models import *


# EP added
class ReadOnlyModelAdmin(admin.ModelAdmin):
    """ModelAdmin class that prevents modifications through the admin.
    The changelist and the detail view work, but a 403 is returned
    if one actually tries to edit an object.
    Source: https://gist.github.com/aaugustin/1388243
    """

    actions = None

    def get_readonly_fields(self, request, obj=None):
        return self.fields or [f.name for f in self.model._meta.fields]

    def has_add_permission(self, request):
        return False

    # Allow viewing objects but not actually changing them
    def has_change_permission(self, request, obj=None):
        if request.method not in ('GET', 'HEAD'):
            return False
        return super(ReadOnlyModelAdmin, self).has_change_permission(request, obj)

    def has_delete_permission(self, request, obj=None):
        return False


# EP added

# Edit mode
# DEBUG = False
# View only mode
# DEBUG = True

''' Uncomment for production '''

# if settings.DEBUG:
# class PyrosModelAdmin(ReadOnlyModelAdmin):
#     pass
# else:
#     class PyrosModelAdmin(admin.ModelAdmin):
#         pass


class PyrosModelAdmin(admin.ModelAdmin):
    pass

# Many To Many interface adapter


class PyrosUserAndSPInline(admin.TabularInline):
    model = ScientificProgram.pyros_users.through


class SequenceAndScheduleInline(admin.TabularInline):
    model = Schedule.sequences.through


class ScheduleAdmin(admin.ModelAdmin):
    inlines = [
        SequenceAndScheduleInline,
    ]
    exclude = ('sequences',)


# One To Many interface adapters

class SequenceInline(admin.TabularInline):
    model = Sequence
    readonly_fields = ("name",)
    fields = ("name",)
    show_change_link = True


class RequestInline(admin.TabularInline):
    model = Request
    readonly_fields = ("name",)
    fields = ("name",)
    show_change_link = True


class AlbumInline(admin.TabularInline):
    model = Album
    readonly_fields = ("name",)
    fields = ("name",)
    show_change_link = True


class PlanInline(admin.TabularInline):
    model = Plan
    readonly_fields = ("name",)
    fields = ("name",)
    show_change_link = True


class ImageInline(admin.TabularInline):
    model = Image
    readonly_fields = ("name",)
    fields = ("name",)
    show_change_link = True


class DetectorInline(admin.TabularInline):
    model = Detector
    readonly_fields = ("device_name",)
    fields = ("device_name",)
    show_change_link = True


class PyrosUserInline(admin.TabularInline):
    model = PyrosUser
    readonly_fields = ("user_username",)
    fields = ("user_username",)
    show_change_link = True


class FilterInline(admin.TabularInline):
    model = Filter
    readonly_fields = ("device_name",)
    fields = ("device_name",)
    show_change_link = True


class AlertInline(admin.TabularInline):
    model = Alert
    readonly_fields = ("request_name",)
    fields = ("request_name",)
    show_change_link = True


# Admin model classes

class RequestAdmin(PyrosModelAdmin):
    inlines = [
        SequenceInline,
    ]


class SequenceAdmin(PyrosModelAdmin):
    inlines = [
        AlbumInline,
        SequenceAndScheduleInline,  # for M2M interface
    ]


class PyrosUserAdmin(PyrosModelAdmin):
    inlines = [
        RequestInline,
        # A user has many SPs
        PyrosUserAndSPInline,  # for M2M interface
    ]


class StrategyObsAdmin(PyrosModelAdmin):
    inlines = [
        AlertInline,
    ]


class ScientificProgramAdmin(PyrosModelAdmin):
    inlines = [
        RequestInline,
        # A SP has many users:
        PyrosUserAndSPInline,  # for M2M interface
    ]
    exclude = ('pyros_users',)  # for M2M interface


class CountryAdmin(PyrosModelAdmin):
    inlines = [
        PyrosUserInline,
    ]


class UserLevelAdmin(PyrosModelAdmin):
    inlines = [
        PyrosUserInline,
    ]


class FilterAdmin(PyrosModelAdmin):
    inlines = [
        PlanInline,
    ]


class FilterWheelAdmin(PyrosModelAdmin):
    inlines = [
        FilterInline,
    ]


class NrtAnalysisAdmin(PyrosModelAdmin):
    inlines = [
        ImageInline,
    ]


class DetectorAdmin(PyrosModelAdmin):
    inlines = [
        AlbumInline,
    ]


class TelescopeAdmin(PyrosModelAdmin):
    inlines = [
        DetectorInline,
    ]


class PlanAdmin(PyrosModelAdmin):
    inlines = [
        ImageInline,
    ]


# class AlbumAdmin(admin.ModelAdmin):
class AlbumAdmin(PyrosModelAdmin):
    inlines = [
        PlanInline,
    ]


# Link the models to the admin interface

admin.site.register(Album, AlbumAdmin)
admin.site.register(Alert)
admin.site.register(Country, CountryAdmin)
admin.site.register(Detector, DetectorAdmin)
admin.site.register(Device)
admin.site.register(Filter, FilterAdmin)
admin.site.register(FilterWheel, FilterWheelAdmin)
admin.site.register(Image)
admin.site.register(Log)
admin.site.register(NrtAnalysis, NrtAnalysisAdmin)
admin.site.register(Plan, PlanAdmin)
admin.site.register(Request, RequestAdmin)
admin.site.register(Schedule, ScheduleAdmin)
admin.site.register(ScheduleHasSequences)
admin.site.register(ScientificProgram, ScientificProgramAdmin)
admin.site.register(Sequence, SequenceAdmin)
admin.site.register(SiteWatch)
admin.site.register(SiteWatchHistory)
admin.site.register(StrategyObs, StrategyObsAdmin)
admin.site.register(TaskId)
admin.site.register(Telescope, TelescopeAdmin)
admin.site.register(PyrosUser, PyrosUserAdmin)
admin.site.register(UserLevel, UserLevelAdmin)
admin.site.register(Version)
admin.site.register(WeatherWatch)
admin.site.register(WeatherWatchHistory)