use crate::{CacheControl, Error, Result};

/// Query response
#[derive(Debug)]
pub struct Response {
    /// Data of query result
    pub data: serde_json::Value,

    /// Extensions result
    pub extensions: Option<serde_json::Value>,

    /// Cache control value
    pub cache_control: CacheControl,

    /// Error
    pub error: Option<Error>,
}

impl Response {
    /// Returns `true` if the response is ok.
    #[inline]
    pub fn is_ok(&self) -> bool {
        self.error.is_none()
    }

    /// Returns `true` if the response is error.
    #[inline]
    pub fn is_err(&self) -> bool {
        self.error.is_some()
    }

    /// Get self.
    ///
    /// Panics
    ///
    /// It will panic when the response is error.
    #[inline]
    pub fn unwrap(self) -> Self {
        self
    }

    /// Get the error object.
    ///
    /// Panics
    ///
    /// It will panic when the response is ok.
    #[inline]
    pub fn unwrap_err(self) -> Error {
        self.error.unwrap()
    }

    /// Returns the contained error, consuming the self value.
    ///
    /// Panics
    ///
    /// Panics if the response is ok, with a panic message including the passed message.
    #[inline]
    pub fn expect_err(self, msg: &str) -> Error {
        match self.error {
            Some(err) => err,
            None => panic!("{}", msg),
        }
    }

    /// Returns self, consuming the self value.
    ///
    /// Panics
    ///
    /// Panics if the response is errror, with a panic message including the passed message.
    #[inline]
    pub fn expect(self, msg: &str) -> Self {
        match self.error {
            Some(_) => panic!("{}", msg),
            None => self,
        }
    }

    /// Convert response to `Result<Response>`.
    #[inline]
    pub fn into_result(self) -> Result<Self> {
        if self.is_err() {
            Err(self.error.unwrap())
        } else {
            Ok(self)
        }
    }
}

impl From<Error> for Response {
    fn from(err: Error) -> Self {
        Self {
            data: serde_json::Value::Null,
            extensions: None,
            cache_control: CacheControl::default(),
            error: Some(err),
        }
    }
}