from django.db import models
from apps.utils.models import CommonBModel, BaseModel, CommonBDModel
from apps.mtm.models import Material


# Create your models here.
class Supplier(CommonBModel):
    """
    供应商
    """
    name = models.CharField('供应商名称', max_length=50)
    contact = models.CharField('联系人', max_length=20)
    contact_phone = models.CharField('联系电话', max_length=11)
    address = models.CharField('地址', max_length=200, default='')


class PuPlan(CommonBModel):
    """
    采购计划
    """
    PUPLAN_CREATE = 10
    PUPLAN_SUBMITED = 20
    PUPLAN_ORDERING = 30
    PUPLAN_ORDERED = 40
    PUPLAN_DONE = 50
    PUPLAN_STATES = (
    (PUPLAN_CREATE, '创建中'),
    (PUPLAN_SUBMITED, '已提交'),
    (PUPLAN_ORDERING, '下单中'),
    (PUPLAN_ORDERED, '下单完成'),
    (PUPLAN_DONE, '已完成'),
    )
    state = models.PositiveSmallIntegerField('状态', choices=PUPLAN_STATES, default=10, help_text=str(PUPLAN_STATES))
    number = models.CharField('编号', max_length=20)
    name = models.CharField('名称', max_length=50, null=True, blank=True)
    submit_time = models.DateTimeField('提交时间', null=True, blank=True)



class PuOrder(CommonBModel):
    """
    采购订单
    """
    PUORDER_CREATE = 10
    PUORDER_SUBMITED = 20
    PUORDER_SHIP = 30
    PUORDER_DONE = 40
    PUORDER_STATES = (
        (PUORDER_CREATE, '创建中'),
        (PUORDER_SUBMITED, '已提交'),
        (PUORDER_SHIP, '到货中'),
        (PUORDER_DONE, '已完成'),
    )
    state = models.PositiveSmallIntegerField('状态', choices=PUORDER_STATES, default=10, help_text=str(PUORDER_STATES))
    number = models.CharField('订单编号', max_length=20, null=True, blank=True)
    supplier = models.ForeignKey(Supplier, verbose_name='供应商', on_delete=models.CASCADE)
    delivery_date = models.DateField('截止到货日期', null=True, blank=True)
    submit_time = models.DateTimeField('提交时间', null=True, blank=True)


class PuOrderItem(BaseModel):
    material = models.ForeignKey(Material, verbose_name='物料', on_delete=models.CASCADE)
    count = models.PositiveIntegerField('所需数量', default=0)
    delivered_count = models.PositiveIntegerField('已到货数量', default=0)
    pu_order = models.ForeignKey(PuOrder, verbose_name='关联采购订单', 
        on_delete=models.CASCADE, null=True, blank=True, related_name='item_puorder')
    


class PuPlanItem(CommonBDModel):
    """
    采购计划明细(因为各部门填写所以需要belong_dept字段)
    """
    material = models.ForeignKey(Material, verbose_name='所需物料', on_delete=models.CASCADE)
    need_count = models.PositiveIntegerField('所属数量')
    need_date = models.DateField('需求日期')
    note = models.TextField('备注', default='')
    pu_plan = models.ForeignKey(PuPlan, verbose_name='采购计划', on_delete=models.CASCADE,
                                null=True, blank=True, related_name='item_puplan')
    pu_order = models.ForeignKey(PuOrder, verbose_name='关联采购订单', 
        on_delete=models.SET_NULL, null=True, blank=True, related_name='puplan_item_puorder')