use crate::JValue;
use thiserror::Error as ThisError;
#[derive(Debug, Clone, ThisError)]
pub enum LambdaError {
#[error("lambda is applied to a stream that have only '{stream_size}' elements, but '{idx}' requested")]
CanonStreamNotHaveEnoughValues { stream_size: usize, idx: usize },
#[error("lambda is applied to an empty stream")]
EmptyStream,
#[error("field accessor (with field name = '{field_name}') can't be applied to a stream")]
FieldAccessorAppliedToStream { field_name: String },
#[error("value '{value}' is not an array-type to match array accessor with idx = '{idx}'")]
ArrayAccessorNotMatchValue { value: JValue, idx: u32 },
#[error("value '{value}' does not contain element for idx = '{idx}'")]
ValueNotContainSuchArrayIdx { value: JValue, idx: u32 },
#[error("value '{value}' does not contain element with field name = '{field_name}'")]
ValueNotContainSuchField { value: JValue, field_name: String },
#[error("value '{value}' is not an map-type to match field accessor with field_name = '{field_name}'")]
FieldAccessorNotMatchValue { value: JValue, field_name: String },
#[error("index accessor `{accessor} can't be converted to u32`")]
IndexAccessNotU32 { accessor: serde_json::Number },
#[error("scalar accessor `{scalar_accessor}` should has number or string type")]
ScalarAccessorHasInvalidType { scalar_accessor: JValue },
#[error("stream accessor `{scalar_accessor}` should has number (u32) type")]
StreamAccessorHasInvalidType { scalar_accessor: JValue },
#[error("canon stream map accessor `{map_accessor}` should be either string or number")]
CanonStreamMapAccessorHasInvalidType { map_accessor: JValue },
#[error("canon stream map accessor must not be iterable")]
CanonStreamMapAccessorMustNotBeIterable,
}