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/*
Copyright (C) 2021-2023 Kunal Mehta <legoktm@debian.org>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
//! Parsoid error type

use thiserror::Error as ThisError;

/// Primary error class
#[non_exhaustive]
#[derive(ThisError, Debug)]
pub enum Error {
    /* Request related errors */
    /// A HTTP error like a 4XX or 5XX status code
    #[cfg(feature = "http")]
    #[cfg_attr(docs, doc(cfg(feature = "http")))]
    #[error("HTTP error: {0}")]
    Http(#[from] reqwest::Error),
    /// Invalid header value, likely if the provided User-agent is invalid
    #[cfg(feature = "http")]
    #[cfg_attr(docs, doc(cfg(feature = "http")))]
    #[error("Invalid header value")]
    InvalidHeaderValue(#[from] reqwest::header::InvalidHeaderValue),
    /// Error when encoding or decoding JSON
    #[error("JSON error: {0}")]
    InvalidJson(#[from] serde_json::Error),
    /// Error if unable to get request concurrency lock
    #[cfg(feature = "http")]
    #[cfg_attr(docs, doc(cfg(feature = "http")))]
    #[error("Unable to get request lock")]
    LockFailure(#[from] tokio::sync::AcquireError),

    /// Page does not exist
    #[error("Page does not exist: {0}")]
    PageDoesNotExist(String),

    /// etag header is invalid/missing
    #[error("The etag for this request is missing or invalid")]
    InvalidEtag,

    /* Wikitext/markup issues */
    #[error("Heading levels must be between 1 and 6, '{0}' was provided")]
    InvalidHeadingLevel(u32),
}