/*
File:   std_functions.c
Author: Taylor Robbins
Date:   09\01\2025
Description: 
	** Contains all the functions that are required as imports by the C standard library implementation in the std folder
*/

import { WASM_MEMORY_PAGE_SIZE, appGlobals } from './globals.js'
import { wasmPntrToJsString, wasmPntrAndLengthToJsString } from './wasm_functions.js'

export function jsStdPrint(level, messageStrPntr, messageLength)
{
	let messageStr = wasmPntrAndLengthToJsString(messageStrPntr, messageLength);
	if (level == 0) { console.debug(messageStr); }
	else if (level == 1) { console.info(messageStr); }
	else if (level == 2) { console.warn(messageStr); }
	else if (level == 3) { console.error(messageStr); }
	else { console.log(messageStr); }
}

export function jsStdAbort(messageStrPntr, exitCode)
{
	let messageStr = wasmPntrToJsString(messageStrPntr);
	let exitStr = "Abort [" + exitCode + "]: " + messageStr;
	console.error(exitStr);
	throw new Error(exitStr);
}

export function jsStdAssertFailure(filePathPntr, fileLineNum, funcNamePntr, conditionStrPntr, messageStrPntr)
{
	let filePath = wasmPntrToJsString(filePathPntr);
	let funcName = wasmPntrToJsString(funcNamePntr);
	let conditionStr = wasmPntrToJsString(conditionStrPntr);
	let outputMessage = "";
	if (messageStrPntr != 0)
	{
		let messageStr = wasmPntrToJsString(messageStrPntr);
		outputMessage = "Assertion failed, " + messageStr + " (" + conditionStr + ") is not true! In " + filePath + ":" + fileLineNum + " " + funcName + "(...)";
	}
	else
	{
		outputMessage = "Assertion failed! (" + conditionStr + ") is not true! In " + filePath + ":" + fileLineNum + " " + funcName + "(...)";
	}
	console.error(outputMessage);
	throw new Error(outputMessage);
}

export function jsStdDebugBreak()
{
	//TODO: This is not a proper solution, really. Can we somehow notify the debugger in Firefox/Chrome/Safari/etc.?
	alert("A debug breakpoint has been hit!");
}

//TODO: Can we use these inside the Wasm module rather than calling out to javascript??
// __builtin_wasm_memory_size(0); // the number of 64Kb pages we have
// __builtin_wasm_memory_grow(0, blocks); // increases amount of pages
// __builtin_huge_valf(); // similar to Infinity in JS
export function jsStdGrowMemory(numPages)
{
	let currentPageCount = appGlobals.wasmModule.exports.memory.buffer.byteLength / WASM_MEMORY_PAGE_SIZE;
	// console.log("Memory growing by " + numPages + " pages (" + currentPageCount + " -> " + (currentPageCount + numPages) + ")");
	appGlobals.wasmModule.exports.memory.grow(numPages);
	appGlobals.memDataView = new DataView(new Uint8Array(appGlobals.wasmModule.exports.memory.buffer).buffer);
}

export let jsStdFunctions = {
	jsStdPrint: jsStdPrint,
	jsStdAbort: jsStdAbort,
	jsStdAssertFailure: jsStdAssertFailure,
	jsStdDebugBreak: jsStdDebugBreak,
	jsStdGrowMemory: jsStdGrowMemory,
};