import path from 'node:path';
import process from 'node:process';
import {fileURLToPath, pathToFileURL} from 'node:url';

import cleanYamlObject from 'clean-yaml-object';
import concordance from 'concordance';
import isError from 'is-error';
import StackUtils from 'stack-utils';

import {AssertionError} from './assert.js';
import concordanceOptions from './concordance-options.js';

function isAvaAssertionError(source) {
	return source instanceof AssertionError;
}

function filter(propertyName, isRoot) {
	return !isRoot || (propertyName !== 'message' && propertyName !== 'name' && propertyName !== 'stack');
}

function normalizeFile(file, ...base) {
	return file.startsWith('file://') ? file : pathToFileURL(path.resolve(...base, file)).toString();
}

const stackUtils = new StackUtils();
function extractSource(stack, testFile) {
	if (!stack || !testFile) {
		return null;
	}

	testFile = normalizeFile(testFile);

	for (const line of stack.split('\n')) {
		const callSite = stackUtils.parseLine(line);
		if (callSite && normalizeFile(callSite.file) === testFile) {
			return {
				isDependency: false,
				isWithinProject: true,
				file: testFile,
				line: callSite.line,
			};
		}
	}

	return null;
}

function buildSource(source) {
	if (!source) {
		return null;
	}

	// Assume the CWD is the project directory. This holds since this function
	// is only called in test workers, which are created with their working
	// directory set to the project directory.
	const projectDir = process.cwd();

	const file = normalizeFile(source.file.trim(), projectDir);
	const rel = path.relative(projectDir, fileURLToPath(file));

	const [segment] = rel.split(path.sep);
	const isWithinProject = segment !== '..' && (process.platform !== 'win32' || !segment.includes(':'));
	const isDependency = isWithinProject && path.dirname(rel).split(path.sep).includes('node_modules');

	return {
		isDependency,
		isWithinProject,
		file,
		line: source.line,
	};
}

function trySerializeError(error, shouldBeautifyStack, testFile) {
	const stack = error.savedError ? error.savedError.stack : error.stack;

	const retval = {
		avaAssertionError: isAvaAssertionError(error),
		nonErrorObject: false,
		source: extractSource(stack, testFile),
		stack,
		shouldBeautifyStack,
	};

	if (error.actualStack) {
		retval.stack = error.actualStack;
	}

	if (retval.avaAssertionError) {
		retval.improperUsage = error.improperUsage;
		retval.message = error.message;
		retval.name = error.name;
		retval.values = error.values;

		if (error.fixedSource) {
			const source = buildSource(error.fixedSource);
			if (source) {
				retval.source = source;
			}
		}

		if (error.assertion) {
			retval.assertion = error.assertion;
		}

		if (error.operator) {
			retval.operator = error.operator;
		}
	} else {
		retval.object = cleanYamlObject(error, filter); // Cleanly copy non-standard properties
		if (typeof error.message === 'string') {
			retval.message = error.message;
		}

		if (typeof error.name === 'string') {
			retval.name = error.name;
		}
	}

	if (typeof error.stack === 'string') {
		const lines = error.stack.split('\n');
		if (error.name === 'SyntaxError' && !lines[0].startsWith('SyntaxError')) {
			retval.summary = '';
			for (const line of lines) {
				retval.summary += line + '\n';
				if (line.startsWith('SyntaxError')) {
					break;
				}
			}

			retval.summary = retval.summary.trim();
		} else {
			retval.summary = '';
			for (let index = 0; index < lines.length; index++) {
				if (lines[index].startsWith('    at')) {
					break;
				}

				const next = index + 1;
				const end = next === lines.length || lines[next].startsWith('    at');
				retval.summary += end ? lines[index] : lines[index] + '\n';
			}
		}
	}

	return retval;
}

export default function serializeError(origin, shouldBeautifyStack, error, testFile) {
	if (!isError(error)) {
		return {
			avaAssertionError: false,
			nonErrorObject: true,
			formatted: concordance.formatDescriptor(concordance.describe(error, concordanceOptions), concordanceOptions),
		};
	}

	try {
		return trySerializeError(error, shouldBeautifyStack, testFile);
	} catch {
		const replacement = new Error(`${origin}: Could not serialize error`);
		return {
			avaAssertionError: false,
			nonErrorObject: false,
			name: replacement.name,
			message: replacement.message,
			stack: replacement.stack,
			summary: replacement.message,
		};
	}
}