# coding=utf-8
"""
    @project: maxkb
    @Author：虎
    @file： data_set.py
    @date：2023/9/21 9:35
    @desc: 数据集
"""
import uuid
from enum import Enum

from django.db import models
from django.db.models.signals import pre_delete
from django.dispatch import receiver

from common.db.sql_execute import select_one
from common.mixins.app_model_mixin import AppModelMixin
from setting.models import Model
from users.models import User


class TaskType(Enum):
    # 向量
    EMBEDDING = 1
    # 生成问题
    GENERATE_PROBLEM = 2
    # 同步
    SYNC = 3


class State(Enum):
    # 等待
    PENDING = '0'
    # 执行中
    STARTED = '1'
    # 成功
    SUCCESS = '2'
    # 失败
    FAILURE = '3'
    # 取消任务
    REVOKE = '4'
    # 取消成功
    REVOKED = '5'
    # 忽略
    IGNORED = 'n'


class Status:
    type_cls = TaskType
    state_cls = State

    def __init__(self, status: str = None):
        self.task_status = {}
        status_list = list(status[::-1] if status is not None else '')
        for _type in self.type_cls:
            index = _type.value - 1
            _state = self.state_cls(status_list[index] if len(status_list) > index else 'n')
            self.task_status[_type] = _state

    @staticmethod
    def of(status: str):
        return Status(status)

    def __str__(self):
        result = []
        for _type in sorted(self.type_cls, key=lambda item: item.value, reverse=True):
            result.insert(len(self.type_cls) - _type.value, self.task_status[_type].value)
        return ''.join(result)

    def __setitem__(self, key, value):
        self.task_status[key] = value

    def __getitem__(self, item):
        return self.task_status[item]

    def update_status(self, task_type: TaskType, state: State):
        self.task_status[task_type] = state


class Type(models.TextChoices):
    base = 0, '通用类型'

    web = 1, 'web站点类型'

    lark = 2, '飞书类型'
    yuque = 3, '语雀类型'


class HitHandlingMethod(models.TextChoices):
    optimization = 'optimization', '模型优化'
    directly_return = 'directly_return', '直接返回'


def default_model():
    return uuid.UUID('42f63a3d-427e-11ef-b3ec-a8a1595801ab')


def default_status_meta():
    return {"state_time": {}}


class DataSet(AppModelMixin):
    """
    数据集表
    """
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid1, editable=False, verbose_name="主键id")
    name = models.CharField(max_length=150, verbose_name="数据集名称")
    desc = models.CharField(max_length=256, verbose_name="数据库描述")
    user = models.ForeignKey(User, on_delete=models.DO_NOTHING, verbose_name="所属用户")
    type = models.CharField(verbose_name='类型', max_length=1, choices=Type.choices,
                            default=Type.base)
    embedding_mode = models.ForeignKey(Model, on_delete=models.DO_NOTHING, verbose_name="向量模型",
                                       default=default_model)
    meta = models.JSONField(verbose_name="元数据", default=dict)

    class Meta:
        db_table = "dataset"


class Document(AppModelMixin):
    """
    文档表
    """
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid1, editable=False, verbose_name="主键id")
    dataset = models.ForeignKey(DataSet, on_delete=models.DO_NOTHING)
    name = models.CharField(max_length=150, verbose_name="文档名称")
    char_length = models.IntegerField(verbose_name="文档字符数 冗余字段")
    status = models.CharField(verbose_name='状态', max_length=20, default=Status('').__str__)
    status_meta = models.JSONField(verbose_name="状态统计数据", default=default_status_meta)
    is_active = models.BooleanField(default=True)

    type = models.CharField(verbose_name='类型', max_length=1, choices=Type.choices,
                            default=Type.base)
    hit_handling_method = models.CharField(verbose_name='命中处理方式', max_length=20,
                                           choices=HitHandlingMethod.choices,
                                           default=HitHandlingMethod.optimization)
    directly_return_similarity = models.FloatField(verbose_name='直接回答相似度', default=0.9)

    meta = models.JSONField(verbose_name="元数据", default=dict)

    class Meta:
        db_table = "document"


class Paragraph(AppModelMixin):
    """
    段落表
    """
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid1, editable=False, verbose_name="主键id")
    document = models.ForeignKey(Document, on_delete=models.DO_NOTHING, db_constraint=False)
    dataset = models.ForeignKey(DataSet, on_delete=models.DO_NOTHING)
    content = models.CharField(max_length=102400, verbose_name="段落内容")
    title = models.CharField(max_length=256, verbose_name="标题", default="")
    status = models.CharField(verbose_name='状态', max_length=20, default=Status('').__str__)
    status_meta = models.JSONField(verbose_name="状态数据", default=default_status_meta)
    hit_num = models.IntegerField(verbose_name="命中次数", default=0)
    is_active = models.BooleanField(default=True)

    class Meta:
        db_table = "paragraph"


class Problem(AppModelMixin):
    """
    问题表
    """
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid1, editable=False, verbose_name="主键id")
    dataset = models.ForeignKey(DataSet, on_delete=models.DO_NOTHING, db_constraint=False)
    content = models.CharField(max_length=256, verbose_name="问题内容")
    hit_num = models.IntegerField(verbose_name="命中次数", default=0)

    class Meta:
        db_table = "problem"


class ProblemParagraphMapping(AppModelMixin):
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid1, editable=False, verbose_name="主键id")
    dataset = models.ForeignKey(DataSet, on_delete=models.DO_NOTHING, db_constraint=False)
    document = models.ForeignKey(Document, on_delete=models.DO_NOTHING)
    problem = models.ForeignKey(Problem, on_delete=models.DO_NOTHING, db_constraint=False)
    paragraph = models.ForeignKey(Paragraph, on_delete=models.DO_NOTHING, db_constraint=False)

    class Meta:
        db_table = "problem_paragraph_mapping"


class Image(AppModelMixin):
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid1, editable=False, verbose_name="主键id")
    image = models.BinaryField(verbose_name="图片数据")
    image_name = models.CharField(max_length=256, verbose_name="图片名称", default="")

    class Meta:
        db_table = "image"


class File(AppModelMixin):
    id = models.UUIDField(primary_key=True, max_length=128, default=uuid.uuid1, editable=False, verbose_name="主键id")

    file_name = models.CharField(max_length=256, verbose_name="文件名称", default="")

    loid = models.IntegerField(verbose_name="loid")

    meta = models.JSONField(verbose_name="文件关联数据", default=dict)

    class Meta:
        db_table = "file"

    def save(
            self, bytea=None, force_insert=False, force_update=False, using=None, update_fields=None
    ):
        result = select_one("SELECT lo_from_bytea(%s, %s::bytea) as loid", [0, bytea])
        self.loid = result['loid']
        super().save()

    def get_byte(self):
        result = select_one(f'SELECT lo_get({self.loid}) as "data"', [])
        return result['data']


@receiver(pre_delete, sender=File)
def on_delete_file(sender, instance, **kwargs):
    select_one(f'SELECT lo_unlink({instance.loid})', [])