from django.db import models
from django.utils import timezone


# 消耗品类别管理表
class ConsumableGoodsCategory(models.Model):
    category_id = models.AutoField(primary_key=True, verbose_name='类别ID')
    category_name = models.CharField(max_length=255, unique=True, verbose_name='类别名称')
    description = models.TextField(blank=True, verbose_name='描述')

    class Meta:
        verbose_name = '消耗品类别管理'
        verbose_name_plural = '消耗品类别管理'

    def __str__(self):
        return self.category_name


# 消耗品入库管理表
class ConsumableGoodsInboundManagement(models.Model):
    inbound_id = models.AutoField(primary_key=True, verbose_name='入库记录ID')
    inventory = models.ForeignKey('ConsumableGoodsInventory', on_delete=models.CASCADE, verbose_name='库存')
    item_name = models.CharField(max_length=255, verbose_name='物品名称')
    category = models.ForeignKey(ConsumableGoodsCategory, on_delete=models.CASCADE, verbose_name='类别', blank=True, null=True)
    specification = models.CharField(max_length=255, verbose_name='规格', blank=True, null=True)
    unit = models.CharField(max_length=255, verbose_name='单位', blank=True, null=True)
    quantity = models.IntegerField(verbose_name='数量')
    date = models.DateField(verbose_name='日期', blank=True, null=True)
    checker = models.CharField(max_length=255, verbose_name='核对人', blank=True, null=True)
    storage_location = models.CharField(max_length=255, verbose_name='库存地', blank=True, null=True)

    class Meta:
        verbose_name = '消耗品入库管理'
        verbose_name_plural = '消耗品入库管理'

    def __str__(self):
        return f"{self.category} - {self.quantity} {self.unit} - {self.date}"


# 消耗品库存
class ConsumableGoodsInventory(models.Model):
    inventory_id = models.AutoField(primary_key=True, verbose_name='库存ID')
    item_name = models.CharField(max_length=255, verbose_name='物品名称')
    category = models.ForeignKey(ConsumableGoodsCategory, on_delete=models.CASCADE, verbose_name='类别')
    specification = models.CharField(max_length=255, verbose_name='规格', blank=True, null=True)
    unit = models.CharField(max_length=255, verbose_name='单位', blank=True, null=True)
    storage_location = models.CharField(max_length=255, verbose_name='库存地', blank=True, null=True)
    safety_stock = models.IntegerField(verbose_name='安全库存量', blank=True, null=True)
    current_inventory = models.IntegerField(verbose_name='当前库存量', blank=True, null=True, default=0)
    replenishment_alert = models.BooleanField(default=False, verbose_name='补货提醒', blank=True, null=True)

    class Meta:
        verbose_name = '消耗品库存'
        verbose_name_plural = '消耗品库存'

    def __str__(self):
        return f"{self.item_name} - {self.current_inventory} {self.unit} in {self.storage_location}"


# 消耗品出库记录
class ConsumableGoodsOutboundRecords(models.Model):
    outbound_id = models.AutoField(primary_key=True, verbose_name='出库记录ID')
    inventory = models.ForeignKey(ConsumableGoodsInventory, on_delete=models.CASCADE, verbose_name='库存')
    item_name = models.CharField(max_length=255, verbose_name='物品名称')
    category = models.ForeignKey(ConsumableGoodsCategory, on_delete=models.CASCADE, verbose_name='类别', blank=True, null=True)
    specification = models.CharField(max_length=255, verbose_name='规格', blank=True, null=True)
    unit = models.CharField(max_length=255, verbose_name='单位', blank=True, null=True)
    quantity_out = models.IntegerField(verbose_name='出库数量')
    outbound_date = models.DateField(verbose_name='出库日期', blank=True, null=True)
    recipient = models.CharField(max_length=255, verbose_name='领用人', blank=True, null=True)
    purpose = models.CharField(max_length=255, verbose_name='用途', blank=True, null=True)

    class Meta:
        verbose_name = '消耗品出库记录'
        verbose_name_plural = '消耗品出库记录'

    def __str__(self):
        return f"{self.item_name} - {self.quantity_out} {self.unit} - {self.outbound_date}"


# 公司手机号使用登记表
class CompanyMobilePhoneUsageRegistry(models.Model):
    STATUS_CHOICES = [
        ('正常使用', '正常使用'),
        ('注销', '注销'),
        ('过期', '过期')
    ]

    record_id = models.AutoField(primary_key=True, verbose_name='记录ID')
    mobile_number = models.CharField(max_length=20, unique=True, verbose_name='手机号')
    status = models.CharField(max_length=10, choices=STATUS_CHOICES, verbose_name='状态')
    owner = models.CharField(max_length=255, verbose_name='机主')
    current_user = models.CharField(max_length=255, verbose_name='现使用人')
    purpose = models.CharField(max_length=255, verbose_name='用途')

    class Meta:
        verbose_name = '公司手机号使用登记'
        verbose_name_plural = '公司手机号使用登记'

    def __str__(self):
        return f"{self.mobile_number} - {self.current_user}"


# 商务车使用登记表
class BusinessVehicleUsageRegistry(models.Model):
    record_id = models.AutoField(primary_key=True, verbose_name='记录ID')
    license_plate = models.CharField(max_length=20, verbose_name='车牌')
    borrower = models.CharField(max_length=255, verbose_name='借用人')
    checkout_time = models.DateTimeField(verbose_name='借出时间', null=True, blank=True)
    accompanying_personnel = models.CharField(max_length=255, verbose_name='同行人员', null=True, blank=True)
    reason = models.CharField(max_length=255, verbose_name='事由', null=True, blank=True)
    destination = models.CharField(max_length=255, verbose_name='目的地', null=True, blank=True)
    days_of_use = models.IntegerField(verbose_name='用车天数', null=True, blank=True)
    return_time = models.DateTimeField(verbose_name='还车时间', null=True, blank=True)

    class Meta:
        verbose_name = '商务车使用登记'
        verbose_name_plural = '商务车使用登记'

    def __str__(self):
        return f"{self.license_plate} - {self.borrower} - {self.checkout_time}"


# 会员账号登记表
class MembershipAccountsRegistry(models.Model):
    STATUS_CHOICES = [
        ('正常', '正常'),
        ('过期', '过期')
    ]

    record_id = models.AutoField(primary_key=True, verbose_name='记录ID')
    platform_name = models.CharField(max_length=255, verbose_name='平台名称', null=True, blank=True)
    purpose = models.CharField(max_length=255, verbose_name='用途', null=True, blank=True)
    price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='价格（元）', null=True, blank=True)
    unit = models.CharField(max_length=255, verbose_name='计费周期', null=True, blank=True)
    manager = models.CharField(max_length=255, verbose_name='管理人', null=True, blank=True)
    account = models.CharField(max_length=255, verbose_name='账号', null=True, blank=True)
    email = models.EmailField(max_length=255, verbose_name='绑定邮箱', null=True, blank=True)
    phone_number = models.CharField(max_length=20, verbose_name='绑定手机', null=True, blank=True)
    effective_date = models.DateField(verbose_name='会员生效日', null=True, blank=True)
    expiration_date = models.DateField(verbose_name='会员到期日', null=True, blank=True)
    status = models.CharField(max_length=10, choices=STATUS_CHOICES, verbose_name='状态', null=True, blank=True)

    def save(self, *args, **kwargs):
        current_date = timezone.now().date()
        if self.effective_date and self.expiration_date:
            if self.effective_date <= current_date <= self.expiration_date:
                self.status = '正常'
            else:
                self.status = '过期'
        else:
            self.status = '过期'
        super().save(*args, **kwargs)

    @property
    def current_status(self):
        # 根据系统时间与会员到期日自动判断状态
        if self.expiration_date < timezone.now().date():
            return '过期'
        return '正常'

    class Meta:
        verbose_name = '会员账号登记'
        verbose_name_plural = '会员账号登记'

    def __str__(self):
        return f"{self.platform_name} - {self.account}"


# 会员账号变更记录表
class MembershipModificationRecord(models.Model):
    change_record_id = models.AutoField(primary_key=True, verbose_name='变更记录ID')
    account_record = models.ForeignKey('MembershipAccountsRegistry', on_delete=models.CASCADE, verbose_name='会员记录ID')
    modification_date = models.DateField(verbose_name='修改日期')
    modification_reason = models.TextField(verbose_name='修改原因', null=True, blank=True)
    previous_expiration_date = models.DateField(verbose_name='修改前到期日')
    new_expiration_date = models.DateField(verbose_name='修改后到期日')

    class Meta:
        verbose_name = '会员账号变更记录'
        verbose_name_plural = '会员账号变更记录'

    def __str__(self):
        return f"变更记录ID: {self.change_record_id} - 会员记录ID: {self.account_record_id}"


# 储值卡登记表
class StoredValueCardRegistration(models.Model):
    record_id = models.AutoField(primary_key=True, verbose_name='记录编号')
    merchant_name = models.CharField(max_length=255, verbose_name='商家名称')
    merchant_type = models.CharField(max_length=255, verbose_name='商家类型')
    balance = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='余额（元）', default=0)
    usage_records = models.TextField(verbose_name='使用记录')

    class Meta:
        verbose_name = '储值卡登记表'
        verbose_name_plural = '储值卡登记表'
        constraints = [
            models.UniqueConstraint(fields=['merchant_name', 'merchant_type'],
                                    name='unique_merchant_name_merchant_type')
        ]

    def __str__(self):
        return f"{self.merchant_name} - 余额: {self.balance}元"


# 储值卡使用记录表
class StoredValueCardUseRecord(models.Model):
    usage_record_id = models.AutoField(primary_key=True, verbose_name='使用记录ID')
    stored_value_card = models.ForeignKey(StoredValueCardRegistration, on_delete=models.CASCADE, verbose_name='储值卡记录ID')
    transaction_date = models.DateField(verbose_name='交易日期')
    transaction_amount = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='交易金额')
    transaction_type = models.CharField(max_length=10, choices=[('充值', '充值'), ('消费', '消费')],  verbose_name='交易类型')
    current_balance = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='当前余额（元）')
    consumer = models.CharField(max_length=255, blank=True, null=True, verbose_name='消费人')
    primary_department = models.CharField(max_length=255, blank=True, null=True, verbose_name='一级部门')
    purpose = models.CharField(max_length=255, blank=True, null=True, verbose_name='用途')
    created_at = models.DateTimeField(auto_now_add=True, verbose_name='记录创建时间')
    updated_at = models.DateTimeField(auto_now=True, verbose_name='记录更新时间')

    class Meta:
        verbose_name = '储值卡使用记录表'
        verbose_name_plural = '储值卡使用记录表'

    def __str__(self):
        return f"记录ID: {self.usage_record_id}, 储值卡ID: {self.stored_value_card_id}, 交易类型: {self.transaction_type}"