reifydb-core 0.4.12

// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2025 ReifyDB

use std::env;

use reifydb_type::{error::Diagnostic, fragment::Fragment};

/// Creates a detailed internal error diagnostic with source location and
/// context
pub fn internal_with_context(
	reason: impl Into<String>,
	file: &str,
	line: u32,
	column: u32,
	function: &str,
	module_path: &str,
) -> Diagnostic {
	let reason = reason.into();

	// Generate a unique error ID based on location
	let error_id = format!("ERR-{}:{}", file.rsplit('/').next().unwrap_or(file).replace(".rs", ""), line);

	let detailed_message = format!("Internal error [{}]: {}", error_id, reason);

	let location_info =
		format!("Location: {}:{}:{}\nFunction: {}\nModule: {}", file, line, column, function, module_path);

	let help_message = format!(
		"This is an internal error that should never occur in normal operation.\n\n\
         Please file a bug report at: https://github.com/reifydb/reifydb/issues\n\n\
         Include the following information:\n\
         ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n\
         Error ID: {}\n\
         {}\n\
         Version: {}\n\
         Build: {} ({})\n\
         Platform: {} {}\n\
         ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━",
		error_id,
		location_info,
		env!("CARGO_PKG_VERSION"),
		option_env!("GIT_HASH").unwrap_or("unknown"),
		option_env!("BUILD_DATE").unwrap_or("unknown"),
		env::consts::OS,
		env::consts::ARCH
	);

	Diagnostic {
		code: "INTERNAL_ERROR".to_string(),
		rql: None,
		message: detailed_message,
		column: None,
		fragment: Fragment::None,
		label: Some(format!("Internal invariant violated at {}:{}:{}", file, line, column)),
		help: Some(help_message),
		notes: vec![
			format!("Error occurred in function: {}", function),
			"This error indicates a critical internal inconsistency.".to_string(),
			"Your database may be in an inconsistent state.".to_string(),
			"Consider creating a backup before continuing operations.".to_string(),
			format!("Error tracking ID: {}", error_id),
		],
		cause: None,
		operator_chain: None,
	}
}

/// Simplified internal error without detailed context
pub fn internal(reason: impl Into<String>) -> Diagnostic {
	internal_with_context(reason, "unknown", 0, 0, "unknown", "unknown")
}

/// Creates a diagnostic for shutdown-related errors
/// Used when operations fail because a subsystem is shutting down
pub fn shutdown(component: impl Into<String>) -> Diagnostic {
	let component = component.into();

	Diagnostic {
		code: "SHUTDOWN".to_string(),
		rql: None,
		message: format!("{} is shutting down", component),
		column: None,
		fragment: Fragment::None,
		label: Some(format!("{} is no longer accepting requests", component)),
		help: Some(format!(
			"This operation failed because {} is shutting down.\n\
			 This is expected during database shutdown.",
			component
		)),
		notes: vec![
			"This is not an error - the system is shutting down gracefully".to_string(),
			"Operations submitted during shutdown will be rejected".to_string(),
		],
		cause: None,
		operator_chain: None,
	}
}

/// Macro to create an internal error with automatic source location capture
#[macro_export]
macro_rules! internal {
    ($reason:expr) => {
        $crate::error::diagnostic::internal::internal_with_context(
            $reason,
            file!(),
            line!(),
            column!(),
            {
                fn f() {}
                fn type_name_of<T>(_: T) -> &'static str {
                    std::any::type_name::<T>()
                }
                let name = type_name_of(f);
                &name[..name.len() - 3]
            },
            module_path!()
        )
    };
    ($fmt:expr, $($arg:tt)*) => {
        $crate::error::diagnostic::internal::internal_with_context(
            format!($fmt, $($arg)*),
            file!(),
            line!(),
            column!(),
            {
                fn f() {}
                fn type_name_of<T>(_: T) -> &'static str {
                    std::any::type_name::<T>()
                }
                let name = type_name_of(f);
                &name[..name.len() - 3]
            },
            module_path!()
        )
    };
}

/// Macro to create an internal error result with automatic source location
/// capture
#[macro_export]
macro_rules! internal_error {
    ($reason:expr) => {
        reifydb_type::error::Error(Box::new($crate::internal!($reason)))
    };
    ($fmt:expr, $($arg:tt)*) => {
        reifydb_type::error::Error(Box::new($crate::internal!($fmt, $($arg)*)))
    };
}

/// Macro to create an internal error result with automatic source location
/// capture
#[macro_export]
macro_rules! internal_err {
    ($reason:expr) => {
        Err($crate::internal_error!($reason))
    };
    ($fmt:expr, $($arg:tt)*) => {
        Err($crate::internal_error!($fmt, $($arg)*))
    };
}

/// Macro to return an internal error with automatic source location capture
/// This combines return_error! and internal_error! for convenience
#[macro_export]
macro_rules! return_internal_error {
    ($reason:expr) => {
        return $crate::internal_err!($reason)
    };
    ($fmt:expr, $($arg:tt)*) => {
        return $crate::internal_err!($fmt, $($arg)*)
    };
}

#[cfg(test)]
pub mod tests {
	use std::{thread::sleep, time::Duration};

	use super::*;
	use crate::error::Error;

	#[derive(Debug)]
	#[allow(dead_code)]
	struct TestStruct {
		value: i32,
		name: String,
	}

	#[test]
	fn test_internal_error_literal_string() {
		let diagnostic = internal!("simple error message");

		assert_eq!(diagnostic.code, "INTERNAL_ERROR");
		assert!(diagnostic.message.contains("simple error message"));
		assert!(diagnostic.help.is_some());
		assert!(diagnostic.help.as_ref().unwrap().contains("bug report"));
		assert!(diagnostic.notes.len() > 0);
	}

	#[test]
	fn test_internal_error_with_format() {
		let value = 42;
		let name = "test";
		let diagnostic = internal!("Error with value: {} and name: {}", value, name);

		assert_eq!(diagnostic.code, "INTERNAL_ERROR");
		assert!(diagnostic.message.contains("Error with value: 42 and name: test"));
		assert!(diagnostic.label.is_some());
		assert!(diagnostic.label.as_ref().unwrap().contains("Internal invariant violated"));
	}

	#[test]
	fn test_internal_error_inline_variable_syntax() {
		let test_struct = TestStruct {
			value: 42,
			name: "test".to_string(),
		};

		let diagnostic = internal!("Test struct: {:?}", test_struct);

		assert_eq!(diagnostic.code, "INTERNAL_ERROR");
		assert!(diagnostic.message.contains("TestStruct"));
		assert!(diagnostic.message.contains("value: 42"));
		assert!(diagnostic.message.contains("name: \"test\""));
	}

	#[test]
	fn test_internal_err_literal_string() {
		let result: Result<(), Error> = internal_err!("test error");

		assert!(result.is_err());
		let error = result.unwrap_err();
		assert_eq!(error.0.code, "INTERNAL_ERROR");
		assert!(error.0.message.contains("test error"));
	}

	#[test]
	fn test_internal_err_with_format() {
		let code = "ERR_123";
		let line = 456;
		let result: Result<(), Error> = internal_err!("Error code: {} at line {}", code, line);

		assert!(result.is_err());
		let error = result.unwrap_err();
		assert_eq!(error.0.code, "INTERNAL_ERROR");
		assert!(error.0.message.contains("Error code: ERR_123 at line 456"));
	}

	#[test]
	fn test_internal_function() {
		let diagnostic = internal("basic internal error");

		assert_eq!(diagnostic.code, "INTERNAL_ERROR");
		assert!(diagnostic.message.contains("basic internal error"));
		assert!(diagnostic.label.is_some());
		assert!(diagnostic.label.as_ref().unwrap().contains("unknown:0:0"));
	}

	#[test]
	fn test_internal_with_context_function() {
		let diagnostic =
			internal_with_context("context error", "test.rs", 100, 20, "test_function", "test::module");

		assert_eq!(diagnostic.code, "INTERNAL_ERROR");
		assert!(diagnostic.message.contains("context error"));
		assert!(diagnostic.label.is_some());
		assert!(diagnostic.label.as_ref().unwrap().contains("test.rs:100:20"));
		assert!(diagnostic.notes.iter().any(|n| n.contains("test_function")));
		assert!(diagnostic.help.is_some());
		let help = diagnostic.help.as_ref().unwrap();
		assert!(help.contains("test.rs:100:20"));
		assert!(help.contains("test::module"));
	}

	#[test]
	fn test_return_internal_error_in_function() {
		fn test_function_literal() -> Result<(), Error> {
			return_internal_error!("function error");
		}

		let result = test_function_literal();
		assert!(result.is_err());
		let error = result.unwrap_err();
		assert_eq!(error.0.code, "INTERNAL_ERROR");
		assert!(error.0.message.contains("function error"));
	}

	#[test]
	fn test_return_internal_error_with_format() {
		fn test_function_format(val: u32) -> Result<(), Error> {
			return_internal_error!("Invalid value: {:#04x}", val);
		}

		let result = test_function_format(255);
		assert!(result.is_err());
		let error = result.unwrap_err();
		assert_eq!(error.0.code, "INTERNAL_ERROR");
		assert!(error.0.message.contains("Invalid value: 0xff"));
	}

	#[test]
	fn test_error_id_generation() {
		let diagnostic1 = internal_with_context("error 1", "file1.rs", 10, 5, "func1", "mod1");

		// Small delay to ensure different timestamps
		sleep(Duration::from_millis(2));

		let diagnostic2 = internal_with_context("error 2", "file2.rs", 20, 10, "func2", "mod2");

		// Extract error IDs from messages
		let id1 = diagnostic1.message.split('[').nth(1).unwrap().split(']').nth(0).unwrap();
		let id2 = diagnostic2.message.split('[').nth(1).unwrap().split(']').nth(0).unwrap();

		// Error IDs should be unique
		assert_ne!(id1, id2);
		assert!(id1.starts_with("ERR-"));
		assert!(id2.starts_with("ERR-"));
	}
}