// MIT License
//
// Copyright 2023 Michael Büsch <m@bues.ch>
// Copyright © 2020-present, Michael Cummings <mgcummings@yahoo.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// SOFTWARE.

//! A common set of error and result type used in the library.

/// Provides a shared set of error types.
#[derive(Debug)]
pub enum AdxlError {
    /// Used when given address (offset) is read-only, reserved, or unknown.
    IllegalWriteAddress(u8),
    /// Underlying I²C error.
    I2c(),
    /// Underlying SPI error.
    Spi(),
    /// Used when given an un-excepted value for a mode.
    UnknownModeBit(u8),
}

impl core::fmt::Display for AdxlError {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        match self {
            AdxlError::IllegalWriteAddress(addr) => {
                write!(f, "Attempted illegal write to address {}", addr)
            }
            AdxlError::I2c() => write!(f, "I²C interface access failed"),
            AdxlError::Spi() => write!(f, "SPI interface access failed"),
            AdxlError::UnknownModeBit(value) => write!(
                f,
                "Received one or more set unknown mode bit(s) in value: {}",
                value
            ),
        }
    }
}

#[cfg(not(feature = "no_std"))]
impl std::error::Error for AdxlError {}

/// Result type used when return value is needed from methods in library.
pub type AdxlResult<T> = core::result::Result<T, AdxlError>;

/// Result type used when return value is _NOT_ needed from methods in library.
pub type Result = core::result::Result<(), AdxlError>;