import Path from 'node:path'

export function getPathnameFromFilePath(
  inputPath: string,
  params = {},
  strict = false,
  options: { preserveExtensions?: boolean; includeIndex?: boolean } = {}
) {
  const path = inputPath.replace(/\+(spa|ssg|ssr|api)\.tsx?$/, '')
  const file = Path.basename(path)
  const fileName = options.preserveExtensions ? file : file.replace(/\.[a-z]+$/, '')

  function paramsError(part: string) {
    throw new Error(
      `[one] Params doesn't fit route:

      - path: ${path}
      - part: ${part}
      - fileName: ${fileName}
      - params:

${JSON.stringify(params, null, 2)}`
    )
  }

  // remove groups, folder render mode suffixes, and substitute [param] in dirname
  const dirname = Path.dirname(path)
    .split('/')
    .map((segment) => segment.replace(/\+(api|ssg|ssr|spa)$/, ''))
    .join('/')
    .replace(/\([^/]+\)/gi, '')
    .replace(/\[([^\]]+)\]/g, (_, paramName) => {
      const value = params[paramName]
      if (value != null) return String(value)
      if (strict) throw paramsError(paramName)
      return ':' + paramName
    })

  const nameWithParams = (() => {
    if (fileName === 'index' && !options.includeIndex) {
      return '/'
    }
    if (fileName.startsWith('[...')) {
      const part = fileName.replace('[...', '').replace(']', '')
      if (!params[part]) {
        if (strict) {
          throw paramsError(part)
        }
        return `/*`
      }
      return `/${params[part]}`
    }
    return `/${fileName
      .split('/')
      .map((part) => {
        if (part[0] === '[') {
          const found = params[part.slice(1, part.length - 1)]
          if (!found) {
            if (strict) {
              throw paramsError(part)
            }

            return ':' + part.replace('[', '').replace(']', '')
          }
          return found
        }
        return part
      })
      .join('/')}`
  })()

  // hono path will convert +not-found etc too
  return `${dirname}${nameWithParams}`.replace(/\/\/+/gi, '/')
}