from ..dependencies import ma
from ..students.models import Student, Group
from marshmallow import fields, validate, ValidationError
from ..project_supervisor.schemas import ProjectSupervisorSchema


def validate_index(index):
    if len(str(index)) > 6:
        raise ValidationError("Length of index is too long!")
    elif len(str(index)) < 6:
        raise ValidationError("Length of index is too short!")

class GroupSchema(ma.SQLAlchemyAutoSchema):
    project_supervisor = fields.Nested(ProjectSupervisorSchema)
    
    class Meta:
        model = Group


class StudentSchema(ma.SQLAlchemyAutoSchema):
    group = fields.Nested(GroupSchema)

    class Meta:
        model = Student


class StudentsPaginationSchema(ma.Schema):
    students = fields.List(fields.Nested(StudentSchema))
    max_pages = fields.Integer()


class StudentCreateSchema(ma.Schema):
    first_name = fields.Str(validate=validate.Length(min=1, max=255), required=True)
    last_name = fields.Str(validate=validate.Length(min=1, max=255), required=True)
    pesel = fields.Str(validate=validate.Length(min=0, max=11), required=True)
    index = fields.Integer(validate=validate_index, required=True)
    mode = fields.Boolean(required=True)


class StudentEditSchema(ma.Schema):
    first_name = fields.Str(validate=validate.Length(min=1, max=255))
    last_name = fields.Str(validate=validate.Length(min=1, max=255))
    pesel = fields.Str(validate=validate.Length(min=0, max=11))
    index = fields.Integer(validate=validate_index)
    mode = fields.Boolean()


class MessageSchema(ma.Schema):
    message = fields.Str(required=True)


class FileSchema(ma.Schema):
    file = fields.Raw(type='file', required=True)
    mode = fields.Bool(required=True)


class StudentQuerySchema(ma.Schema):
    fullname = fields.Str()
    order_by_first_name = fields.Str()
    order_by_last_name = fields.Str()
    page = fields.Integer()
    per_page = fields.Integer()
    mode = fields.Boolean()


class GroupQuerySchema(ma.Schema):
    name = fields.Str()
    page = fields.Integer()
    per_page = fields.Integer()


class GroupsPaginationSchema(ma.Schema):
    groups = fields.List(fields.Nested(GroupSchema))
    max_pages = fields.Integer()


class GroupCreateSchema(ma.Schema):
    name = fields.Str(validate=validate.Length(min=1, max=255), required=True)
    project_supervisor_id = fields.Integer(validate=validate_index, required=True)
    students = fields.List(fields.Nested(StudentSchema), validate=validate.Length(min=1, max=255), required=True)


class GroupEditSchema(ma.Schema):
    name = fields.Str(validate=validate.Length(min=1, max=255))
    project_supervisor_id = fields.Integer(validate=validate_index)
    students = fields.List(fields.Nested(StudentSchema), validate=validate.Length(min=1, max=255))