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use std::{
    borrow::Cow,
    ops::{Deref, DerefMut},
};

use serde_json::Value;

use crate::{
    registry::{MetaSchema, MetaSchemaRef},
    types::{ParseError, ParseFromJSON, ParseFromParameter, ParseResult, ToJSON, Type},
};

/// A password type.
///
/// NOTE: Its type is `string` and the format is `password`, and it does not
/// protect the data in the memory.
#[derive(Debug, Clone, Eq, PartialEq, Hash)]
pub struct Password(pub String);

impl Deref for Password {
    type Target = String;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl DerefMut for Password {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.0
    }
}

impl AsRef<str> for Password {
    fn as_ref(&self) -> &str {
        &self.0
    }
}

impl Type for Password {
    const IS_REQUIRED: bool = true;

    type RawValueType = Self;

    type RawElementValueType = Self;

    fn name() -> Cow<'static, str> {
        "string(password)".into()
    }

    fn schema_ref() -> MetaSchemaRef {
        MetaSchemaRef::Inline(Box::new(MetaSchema::new_with_format("string", "password")))
    }

    fn as_raw_value(&self) -> Option<&Self::RawValueType> {
        Some(self)
    }

    fn raw_element_iter<'a>(
        &'a self,
    ) -> Box<dyn Iterator<Item = &'a Self::RawElementValueType> + 'a> {
        Box::new(self.as_raw_value().into_iter())
    }
}

impl ParseFromJSON for Password {
    fn parse_from_json(value: Value) -> ParseResult<Self> {
        if let Value::String(value) = value {
            Ok(Self(value))
        } else {
            Err(ParseError::expected_type(value))
        }
    }
}

impl ParseFromParameter for Password {
    fn parse_from_parameter(value: &str) -> ParseResult<Self> {
        Ok(Self(value.to_string()))
    }
}

impl ToJSON for Password {
    fn to_json(&self) -> Value {
        Value::String(self.0.clone())
    }
}