use axum::{
    http::StatusCode,
    response::{IntoResponse, Response},
};
use fc_common::CiError;
use serde_json::json;

pub struct ApiError(pub CiError);

impl From<CiError> for ApiError {
    fn from(err: CiError) -> Self {
        ApiError(err)
    }
}

impl IntoResponse for ApiError {
    fn into_response(self) -> Response {
        let (status, code, message) = match &self.0 {
            CiError::NotFound(msg) => (StatusCode::NOT_FOUND, "NOT_FOUND", msg.clone()),
            CiError::Validation(msg) => (StatusCode::BAD_REQUEST, "VALIDATION_ERROR", msg.clone()),
            CiError::Conflict(msg) => (StatusCode::CONFLICT, "CONFLICT", msg.clone()),
            CiError::Timeout(msg) => (StatusCode::REQUEST_TIMEOUT, "TIMEOUT", msg.clone()),
            CiError::Unauthorized(msg) => (StatusCode::UNAUTHORIZED, "UNAUTHORIZED", msg.clone()),
            CiError::Forbidden(msg) => (StatusCode::FORBIDDEN, "FORBIDDEN", msg.clone()),
            CiError::NixEval(msg) => (
                StatusCode::UNPROCESSABLE_ENTITY,
                "NIX_EVAL_ERROR",
                msg.clone(),
            ),
            CiError::Build(msg) => (StatusCode::UNPROCESSABLE_ENTITY, "BUILD_ERROR", msg.clone()),
            CiError::Config(msg) => (
                StatusCode::INTERNAL_SERVER_ERROR,
                "CONFIG_ERROR",
                msg.clone(),
            ),
            CiError::Database(e) => {
                tracing::error!(error = %e, "Database error in API handler");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    "DATABASE_ERROR",
                    "Internal database error".to_string(),
                )
            }
            CiError::Git(e) => {
                tracing::error!(error = %e, "Git error in API handler");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    "GIT_ERROR",
                    format!("Git operation failed: {e}"),
                )
            }
            CiError::Serialization(e) => {
                tracing::error!(error = %e, "Serialization error in API handler");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    "SERIALIZATION_ERROR",
                    format!("Data serialization error: {e}"),
                )
            }
            CiError::Io(e) => {
                tracing::error!(error = %e, "IO error in API handler");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    "IO_ERROR",
                    format!("IO error: {e}"),
                )
            }
        };

        if status.is_server_error() {
            tracing::warn!(
                status = %status,
                code = code,
                "API error response: {}",
                message
            );
        }

        let body = axum::Json(json!({ "error": message, "error_code": code }));
        (status, body).into_response()
    }
}