from utils.constants import ContestRuleType  # noqa
from django.db import models
from django.utils.timezone import now
from utils.models import JSONField

from utils.constants import ContestStatus, ContestType
from account.models import User, AdminType
from utils.models import RichTextField


class Contest(models.Model):
    title = models.CharField(max_length=40)
    description = RichTextField()
    # show real time rank or cached rank
    real_time_rank = models.BooleanField()
    password = models.CharField(max_length=30, blank=True, null=True)
    # enum of ContestRuleType
    rule_type = models.CharField(max_length=36)
    start_time = models.DateTimeField()
    end_time = models.DateTimeField()
    create_time = models.DateTimeField(auto_now_add=True)
    last_update_time = models.DateTimeField(auto_now=True)
    created_by = models.ForeignKey(User)
    # 是否可见 false的话相当于删除
    visible = models.BooleanField(default=True)

    @property
    def status(self):
        if self.start_time > now():
            # 没有开始 返回1
            return ContestStatus.CONTEST_NOT_START
        elif self.end_time < now():
            # 已经结束 返回-1
            return ContestStatus.CONTEST_ENDED
        else:
            # 正在进行 返回0
            return ContestStatus.CONTEST_UNDERWAY

    @property
    def contest_type(self):
        if self.password:
            return ContestType.PASSWORD_PROTECTED_CONTEST
        return ContestType.PUBLIC_CONTEST

    def is_contest_admin(self, user):
        return user.is_authenticated() and (self.created_by == user or user.admin_type == AdminType.SUPER_ADMIN)

    # 是否有权查看problem 的一些统计信息 诸如submission_number, accepted_number 等
    def problem_details_permission(self, user):
        return self.rule_type == ContestRuleType.ACM or \
               self.status == ContestStatus.CONTEST_ENDED or \
               self.is_contest_admin(user) or \
               self.real_time_rank

    class Meta:
        db_table = "contest"
        ordering = ("-start_time",)


class AbstractContestRank(models.Model):
    user = models.ForeignKey(User)
    contest = models.ForeignKey(Contest)
    submission_number = models.IntegerField(default=0)

    class Meta:
        abstract = True


class ACMContestRank(AbstractContestRank):
    accepted_number = models.IntegerField(default=0)
    # total_time is only for ACM contest total_time =  ac time + none-ac times * 20 * 60
    total_time = models.IntegerField(default=0)
    # {23: {"is_ac": True, "ac_time": 8999, "error_number": 2, "is_first_ac": True}}
    # key is problem id
    submission_info = JSONField(default=dict)

    class Meta:
        db_table = "acm_contest_rank"


class OIContestRank(AbstractContestRank):
    total_score = models.IntegerField(default=0)
    # {23: 333}}
    # key is problem id, value is current score
    submission_info = JSONField(default=dict)

    class Meta:
        db_table = "oi_contest_rank"


class ContestAnnouncement(models.Model):
    contest = models.ForeignKey(Contest)
    title = models.CharField(max_length=128)
    content = RichTextField()
    created_by = models.ForeignKey(User)
    create_time = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = "contest_announcement"
        ordering = ("-create_time",)