from django.contrib import admin
from django.http import HttpResponse
from django.db.models import Q
from django.contrib import messages
from django.utils.safestring import mark_safe

from jobs.models import Resume
from interview import candidate_field as cf
from .tasks import send_dingtalk_message
from .dingtalk import send

import logging
import csv
from datetime import datetime

from interview.models import Candidate

logger = logging.getLogger(__name__)

exportable_fields = ('username', 'city', 'phone', 'bachelor_school', 'master_school', 'degree', 'first_result', 'first_interviewer_user',
                     'second_result', 'second_interviewer_user', 'hr_result', 'hr_score', 'hr_remark', 'hr_interviewer_user')


# 通知一面面试官面试
def notify_interviewer(modeladmin, request, queryset):
    candidates = ""
    interviewers = ""
    for obj in queryset:
        candidates = obj.username + ";" + candidates
        interviewers = obj.first_interviewer_user.username + ";" + interviewers
    # 这里的消息发送到钉钉， 或者通过 Celery 异步发送到钉钉
    #send ("候选人 %s 进入面试环节，亲爱的面试官，请准备好面试： %s" % (candidates, interviewers) )
    send_dingtalk_message.delay("候选人 %s 进入面试环节，亲爱的面试官，请准备好面试： %s" % (candidates, interviewers) )
    messages.add_message(request, messages.INFO, '已经成功发送面试通知')


notify_interviewer.short_description = u'通知一面面试官'


# define export action
def export_model_as_csv(modeladmin, request, queryset):
    response = HttpResponse(content_type='text/csv')
    field_list = exportable_fields
    response['Content-Disposition'] = 'attachment; filename=%s-list-%s.csv' % (
        'recruitment-candidates',
        datetime.now().strftime('%Y-%m-%d-%H-%M-%S'),
    )

    # 写入表头
    writer = csv.writer(response)
    writer.writerow(
        [queryset.model._meta.get_field(f).verbose_name.title() for f in field_list],
    )

    for obj in queryset:
        ## 单行 的记录（各个字段的值）， 根据字段对象，从当前实例 (obj) 中获取字段值
        csv_line_values = []
        for field in field_list:
            field_object = queryset.model._meta.get_field(field)
            field_value = field_object.value_from_object(obj)
            csv_line_values.append(field_value)
        writer.writerow(csv_line_values)
    logger.error(" %s has exported %s candidate records" % (request.user.username, len(queryset)))

    return response


export_model_as_csv.short_description = u'导出为CSV文件'

export_model_as_csv.allowed_permissions = ('export',)

# 候选人管理类
class CandidateAdmin(admin.ModelAdmin):
    exclude = ('creator', 'created_date', 'modified_date')

    actions = (export_model_as_csv, notify_interviewer, )

    # 当前用户是否有导出权限：
    def has_export_permission(self, request):
        opts = self.opts
        return request.user.has_perm('%s.%s' % (opts.app_label, "export"))

    list_display = (
        'username', 'city', 'bachelor_school','get_resume', 'first_score', 'first_result', 'first_interviewer_user', 'second_score',
        'second_result', 'second_interviewer_user', 'hr_score', 'hr_result', 'hr_interviewer_user',)

    # 右侧筛选条件
    list_filter = ('city','first_result','second_result','hr_result','first_interviewer_user','second_interviewer_user','hr_interviewer_user')

    # 查询字段
    search_fields = ('username', 'phone', 'email', 'bachelor_school')

    ### 列表页排序字段
    ordering = ('hr_result','second_result','first_result',)

    def get_resume(self, obj):
        if not obj.phone:
            return ""
        resumes = Resume.objects.filter(phone=obj.phone)
        if resumes and len(resumes) > 0:
            return mark_safe(u'<a href="/resume/%s" target="_blank">%s</a' % (resumes[0].id, "查看简历"))
        return ""

    get_resume.short_description = '查看简历'
    get_resume.allow_tags = True

    # 一面面试官仅填写一面反馈， 二面面试官可以填写二面反馈
    def get_fieldsets(self, request, obj=None):
        group_names = self.get_group_names(request.user)

        if 'interviewer' in group_names and obj.first_interviewer_user == request.user:
            return cf.default_fieldsets_first
        if 'interviewer' in group_names and obj.second_interviewer_user == request.user:
            return cf.default_fieldsets_second
        return cf.default_fieldsets

    # 对于非管理员，非HR，获取自己是一面面试官或者二面面试官的候选人集合:s
    def get_queryset(self, request):  # show data only owned by the user
        qs = super(CandidateAdmin, self).get_queryset(request)

        group_names = self.get_group_names(request.user)
        if request.user.is_superuser or 'hr' in group_names:
            return qs
        return Candidate.objects.filter(Q(first_interviewer_user=request.user) | Q(second_interviewer_user=request.user))

    # list_editable = ('first_interviewer_user','second_interviewer_user',)

    def get_list_editable(self, request):
        group_names = self.get_group_names(request.user)

        if request.user.is_superuser or 'hr' in group_names:
            return ('first_interviewer_user','second_interviewer_user',)
        return ()

    def get_changelist_instance(self, request):
        """
        override admin method and list_editable property value
        with values returned by our custom method implementation.
        """
        self.list_editable = self.get_list_editable(request)
        return super(CandidateAdmin, self).get_changelist_instance(request)

    def get_group_names(self, user):
        group_names = []
        for g in user.groups.all():
            group_names.append(g.name)
        return group_names

    def get_readonly_fields(self, request, obj):
        group_names = self.get_group_names(request.user)

        if 'interviewer' in group_names:
            logger.info("interviewer is in user's group for %s" % request.user.username)
            return ('first_interviewer_user','second_interviewer_user',)
        return ()

    def save_model(self, request, obj, form, change):
        obj.last_editor = request.user.username
        if not obj.creator:
            obj.creator = request.user.username
        obj.modified_date = datetime.now()
        obj.save()


admin.site.register(Candidate, CandidateAdmin)