import { Platform, StackLineParser } from '../types'
import { UNKNOWN_FUNCTION } from './base'

/** Node Stack line parser */
const FILENAME_MATCH = /^\s*[-]{4,}$/
const FULL_MATCH = /at (?:async )?(?:(.+?)\s+\()?(?:(.+):(\d+):(\d+)?|([^)]+))\)?/

export const nodeStackLineParser: StackLineParser = (line: string, platform: Platform) => {
  const lineMatch = line.match(FULL_MATCH)

  if (lineMatch) {
    let object: string | undefined
    let method: string | undefined
    let functionName: string | undefined
    let typeName: string | undefined
    let methodName: string | undefined

    if (lineMatch[1]) {
      functionName = lineMatch[1]

      let methodStart = functionName.lastIndexOf('.')
      if (functionName[methodStart - 1] === '.') {
        methodStart--
      }

      if (methodStart > 0) {
        object = functionName.slice(0, methodStart)
        method = functionName.slice(methodStart + 1)
        const objectEnd = object.indexOf('.Module')
        if (objectEnd > 0) {
          functionName = functionName.slice(objectEnd + 1)
          object = object.slice(0, objectEnd)
        }
      }
      typeName = undefined
    }

    if (method) {
      typeName = object
      methodName = method
    }

    if (method === '<anonymous>') {
      methodName = undefined
      functionName = undefined
    }

    if (functionName === undefined) {
      methodName = methodName || UNKNOWN_FUNCTION
      functionName = typeName ? `${typeName}.${methodName}` : methodName
    }

    let filename = lineMatch[2]?.startsWith('file://') ? lineMatch[2].slice(7) : lineMatch[2]
    const isNative = lineMatch[5] === 'native'

    // If it's a Windows path, trim the leading slash so that `/C:/foo` becomes `C:/foo`
    if (filename?.match(/\/[A-Z]:/)) {
      filename = filename.slice(1)
    }

    if (!filename && lineMatch[5] && !isNative) {
      filename = lineMatch[5]
    }

    return {
      filename: filename ? decodeURI(filename) : undefined,
      module: undefined,
      function: functionName,
      lineno: _parseIntOrUndefined(lineMatch[3]),
      colno: _parseIntOrUndefined(lineMatch[4]),
      in_app: filenameIsInApp(filename || '', isNative),
      platform: platform,
    }
  }

  if (line.match(FILENAME_MATCH)) {
    return {
      filename: line,
      platform: platform,
    }
  }

  return undefined
}

/**
 * Does this filename look like it's part of the app code?
 */
function filenameIsInApp(filename: string, isNative: boolean = false): boolean {
  const isInternal =
    isNative ||
    (filename &&
      // It's not internal if it's an absolute linux path
      !filename.startsWith('/') &&
      // It's not internal if it's an absolute windows path
      !filename.match(/^[A-Z]:/) &&
      // It's not internal if the path is starting with a dot
      !filename.startsWith('.') &&
      // It's not internal if the frame has a protocol. In node, this is usually the case if the file got pre-processed with a bundler like webpack
      !filename.match(/^[a-zA-Z]([a-zA-Z0-9.\-+])*:\/\//)) // Schema from: https://stackoverflow.com/a/3641782

  // in_app is all that's not an internal Node function or a module within node_modules
  // note that isNative appears to return true even for node core libraries
  // see https://github.com/getsentry/raven-node/issues/176

  return !isInternal && filename !== undefined && !filename.includes('node_modules/')
}

function _parseIntOrUndefined(input: string | undefined): number | undefined {
  return parseInt(input || '', 10) || undefined
}