// Copyright 2023 Greptime Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::any::Any;

use common_error::ext::{BoxedError, ErrorExt, RetryHint};
use common_error::status_code::StatusCode;
use common_macro::stack_trace_debug;
use snafu::{Location, Snafu};

#[derive(Snafu)]
#[snafu(visibility(pub))]
#[stack_trace_debug]
pub enum Error {
    #[snafu(display("Failed to open metadata kvbackend"))]
    OpenMetadataKvBackend {
        #[snafu(implicit)]
        location: Location,
        source: BoxedError,
    },

    #[snafu(display("Operation to region server failed"))]
    InvokeRegionServer {
        #[snafu(implicit)]
        location: Location,
        source: servers::error::Error,
    },

    #[snafu(display("External error"))]
    External {
        source: BoxedError,
        #[snafu(implicit)]
        location: Location,
    },

    #[snafu(display("Failed to parse url: {}", url))]
    ParseUrl {
        url: String,
        #[snafu(implicit)]
        location: Location,
        #[snafu(source)]
        error: url::ParseError,
    },

    #[snafu(display("Invalid url scheme: {}", scheme))]
    InvalidUrlScheme { scheme: String },

    #[snafu(display("Invalid region request, reason: {}", reason))]
    InvalidRegionRequest { reason: String },

    #[snafu(display("Repartition procedure is not supported in standalone mode"))]
    NoSupportRepartitionProcedure {
        #[snafu(implicit)]
        location: Location,
    },
}

pub type Result<T> = std::result::Result<T, Error>;

impl ErrorExt for Error {
    fn status_code(&self) -> StatusCode {
        match self {
            Error::OpenMetadataKvBackend { source, .. } => source.status_code(),
            Error::InvokeRegionServer { source, .. } => source.status_code(),
            Error::External { source, .. } => source.status_code(),
            Error::ParseUrl { .. } => StatusCode::InvalidArguments,
            Error::InvalidUrlScheme { .. } => StatusCode::InvalidArguments,
            Error::InvalidRegionRequest { .. } => StatusCode::IllegalState,
            Error::NoSupportRepartitionProcedure { .. } => StatusCode::Unsupported,
        }
    }

    fn as_any(&self) -> &dyn Any {
        self
    }

    fn retry_hint(&self) -> RetryHint {
        match self {
            Error::InvokeRegionServer { source, .. } => source.retry_hint(),
            _ => RetryHint::NonRetryable,
        }
    }
}
