const resultCountPerPath = new Map()
const possibleCjsEsmBridges = new Map()

for (const v8ScriptCov of v8ProcessCov.result) {
	try {
		const path = resolve(this.resolve, v8ScriptCov.url)
		const script = v8toIstanbul(path, this.wrapperLength)

		if (resultCountPerPath.has(path)) {
			resultCountPerPath.set(path, resultCountPerPath.get(path) + 1)
		} else {
			resultCountPerPath.set(path, 0)
		}

		// https://github.com/nodejs/node/blob/v12.0.0/lib/internal/modules/esm/create_dynamic_module.js#L12-L20
		if (
			v8ScriptCov.functions.length === 3 &&
			v8ScriptCov.functions[0].functionName === '' &&
			v8ScriptCov.functions[0].isBlockCoverage === true &&
			v8ScriptCov.functions[1].functionName === 'get' &&
			v8ScriptCov.functions[1].isBlockCoverage === false &&
			v8ScriptCov.functions[2].functionName === 'set' &&
			v8ScriptCov.functions[2].isBlockCoverage === true
		) {
			possibleCjsEsmBridges.set(script, {
				path,
				functions: v8ScriptCov.functions
			})
		} else {
			script.applyCoverage(v8ScriptCov.functions)
			map.merge(script.toIstanbul())
		}
	} catch (err) {
		console.warn(`file: ${v8ScriptCov.url} error: ${err.stack}`)
	}
}

for (const [script, { path, functions }] of possibleCjsEsmBridges) {
	if (resultCountPerPath.get(path) <= 1) {
		script.applyCoverage(functions)
		map.merge(script.toIstanbul())
	}
}