from django.db import models
from utils.models import CoreModel,BaseModel,table_prefix
from mysystem.models import Users

class LYWorkflow(CoreModel):
    """
    工作流模型
    """
    # id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=50, verbose_name="模型名称")
    nodeConfig = models.JSONField(verbose_name="节点配置",null=True,blank=True,default=dict)
    formJson = models.JSONField(verbose_name="表单设计",null=True,blank=True,default=dict)
    other_config = models.JSONField(verbose_name="其他配置",null=True,blank=True,default=dict)
    remark = models.CharField(max_length=100, verbose_name="流程说明", null=True, blank=True)
    version = models.CharField(max_length=50,verbose_name="版本",default="1.0")
    sort = models.IntegerField(default=1,verbose_name="排序")
    status = models.SmallIntegerField(default=0,verbose_name="流程状态") #0，不可用 1，可用
    is_delete = models.BooleanField(default=False, verbose_name="是否删除")#0不删除，1删除

    class Meta:
        db_table = table_prefix + "lyworkflow"
        verbose_name = '工作流模型'
        verbose_name_plural = verbose_name
        ordering = ('-create_datetime',)

WF_STATUS_CHOICES = (
    (0, "处理中"),
    (1, "审批通过"),
    (2, "审批拒绝"),
    (3, "撤销审批"),
    (4, "超时结束"),
    (5, "强制终止"),
    (6, "已完成"),
)

class LYWorkflowInstance(CoreModel):
    """
    工作流实例
    """
    # id = models.BigAutoField(primary_key=True,verbose_name="ID")
    workflow = models.ForeignKey(LYWorkflow,related_name="lyworkflowins", verbose_name='工作流',on_delete=models.SET_NULL,db_constraint=False, blank=True, null=True)# 关联的工作流
    current_step_name = models.CharField(verbose_name='当前所在节点名称', max_length=50)
    current_step_key = models.CharField(verbose_name='当前所在节点key', max_length=50)
    value = models.JSONField(verbose_name="数据",null=True,blank=True,default=dict)
    state = models.SmallIntegerField(choices=WF_STATUS_CHOICES,default=0,verbose_name="状态")
    expire_at = models.DateTimeField(null=True, blank=True,verbose_name="期望结束时间")#过期时间
    end_at = models.DateTimeField(null=True, blank=True,verbose_name="结束时间")
    
    class Meta:
        db_table = 'lywf_instance'
        verbose_name = '工作流实例'
        verbose_name_plural = verbose_name

TASK_TYPE_CHOICES = (
    (0, "发起"),
    (1, "审批"),
)

TASK_STATUS_CHOICES = (
    (0, "发起"),
    (1, "审批中"),
    (2, "已完成"),
    (3, "已撤回"),
    (4, "已超时"),
    (5, "已终止"),
    (6, "已退回"),
)
     
class LYWorkflowTask(CoreModel):
    """
    工作流任务
    """
    # id = models.BigAutoField(primary_key=True,verbose_name="ID")
    name = models.CharField(max_length=50, verbose_name="任务名称")
    instance = models.ForeignKey(LYWorkflowInstance,related_name="lyworkflowtask", verbose_name='工作流实例',on_delete=models.CASCADE,db_constraint=False, blank=True, null=True)# 关联的工作流实例
    current_step_name = models.CharField(verbose_name='当前所在节点名称', max_length=50)
    current_step_key = models.CharField(verbose_name='当前所在节点key', max_length=50)
    value = models.JSONField(verbose_name="数据",null=True,blank=True,default=dict)
    task_type = models.SmallIntegerField(choices=TASK_TYPE_CHOICES,default=0,verbose_name="任务类型")
    state = models.SmallIntegerField(choices=TASK_STATUS_CHOICES,default=0,verbose_name="状态")
    expire_at = models.DateTimeField(null=True, blank=True,verbose_name="期望结束时间")#过期时间
    end_at = models.DateTimeField(null=True, blank=True,verbose_name="结束时间")
    
    class Meta:
        db_table = 'lywf_task'
        verbose_name = '工作流任务'
        verbose_name_plural = verbose_name

ACTOR_TYPE_CHOICES = (
    (0, "用户"),
    (1, "角色"),
    (2, "部门"),
)
      
class LYWorkflowTaskActor(BaseModel):
    """
    工作流-任务参与者
    """
    # id = models.BigAutoField(primary_key=True,verbose_name="ID")
    actor = models.ForeignKey(Users,null=True,blank=True,verbose_name='参与者', on_delete=models.CASCADE, db_constraint=False)
    name = models.CharField(max_length=50, verbose_name="任务名称")
    instance = models.ForeignKey(LYWorkflowInstance, verbose_name='工作流实例',on_delete=models.CASCADE,db_constraint=False, blank=True, null=True)# 关联的工作流实例
    task = models.ForeignKey(LYWorkflowTask, verbose_name='工作流任务',on_delete=models.CASCADE,db_constraint=False, blank=True, null=True)
    actor_type = models.SmallIntegerField(choices=ACTOR_TYPE_CHOICES,default=0,verbose_name="参与者类型")
    
    class Meta:
        db_table = 'lywf_task_actor'
        verbose_name = '工作流任务参与者'
        verbose_name_plural = verbose_name