// erp-diary 错误类型

use axum::http::StatusCode;
use axum::response::{IntoResponse, Response};
use serde::Serialize;

#[derive(Debug, thiserror::Error)]
pub enum DiaryError {
    #[error("日记未找到: {0}")]
    NotFound(String),

    #[error("版本冲突: 本地版本 {local}, 服务端版本 {server}")]
    VersionConflict { local: i32, server: i32 },

    #[error("班级码无效")]
    InvalidClassCode,

    #[error("班级码已过期")]
    ClassCodeExpired,

    #[error("班级码尝试次数过多，请 {lockout_minutes} 分钟后重试")]
    ClassCodeLocked { lockout_minutes: u32 },

    #[error("无权限执行此操作")]
    Forbidden,

    #[error("内容安全检查未通过")]
    ContentSafetyViolation,

    #[error("同步失败: {0}")]
    SyncFailed(String),

    #[error("{0}")]
    BadRequest(String),

    #[error("内部错误: {0}")]
    Internal(String),
}

#[derive(Serialize)]
struct ErrorBody {
    error: String,
    message: String,
}

impl IntoResponse for DiaryError {
    fn into_response(self) -> Response {
        let (status, message) = match &self {
            DiaryError::NotFound(_) => (StatusCode::NOT_FOUND, self.to_string()),
            DiaryError::VersionConflict { .. } => (StatusCode::CONFLICT, self.to_string()),
            DiaryError::InvalidClassCode | DiaryError::ClassCodeExpired => {
                (StatusCode::BAD_REQUEST, self.to_string())
            }
            DiaryError::ClassCodeLocked { .. } => (StatusCode::TOO_MANY_REQUESTS, self.to_string()),
            DiaryError::Forbidden => (StatusCode::FORBIDDEN, self.to_string()),
            DiaryError::ContentSafetyViolation => (StatusCode::BAD_REQUEST, self.to_string()),
            DiaryError::SyncFailed(_) => (StatusCode::INTERNAL_SERVER_ERROR, self.to_string()),
            DiaryError::BadRequest(_) => (StatusCode::BAD_REQUEST, self.to_string()),
            DiaryError::Internal(_) => (StatusCode::INTERNAL_SERVER_ERROR, self.to_string()),
        };

        let body = ErrorBody {
            error: format!("diary.{}", status.as_u16()),
            message,
        };

        (status, axum::Json(body)).into_response()
    }
}

impl From<sea_orm::DbErr> for DiaryError {
    fn from(err: sea_orm::DbErr) -> Self {
        DiaryError::Internal(err.to_string())
    }
}