import { Diagnostic } from '../../types/Diagnostic'
import { LintConfig } from '../../types'
import { FileLintRule } from '../../types/LintRule'
import { LintRuleType } from '../../types/LintRuleType'
import { Severity } from '../../types/Severity'
import { parseMacros } from '../../utils/parseMacros'

const name = 'strictMacroDefinition'
const description = 'Enforce strictly rules of macro definition syntax.'
const message = 'Incorrent Macro Definition Syntax'

const validOptions = [
  'CMD',
  'DES',
  'MINDELIMITER',
  'MINOPERATOR',
  'NOMINOPERATOR',
  'PARMBUFF',
  'SECURE',
  'NOSECURE',
  'STMT',
  'SOURCE',
  'SRC',
  'STORE'
]

const test = (value: string, config?: LintConfig) => {
  const diagnostics: Diagnostic[] = []

  const macros = parseMacros(value, config)

  macros.forEach((macro) => {
    const declaration = macro.declaration

    const regExpParams = new RegExp(/(?<=\().*(?=\))/)
    const regExpParamsResult = regExpParams.exec(declaration)

    let _declaration = declaration
    if (regExpParamsResult) {
      const paramsPresent = regExpParamsResult[0]

      const paramsTrimmed = paramsPresent.trim()
      const params = paramsTrimmed.split(',')
      params.forEach((param) => {
        const trimedParam = param.split('=')[0].trim()

        let paramLineNumber: number = 1,
          paramStartIndex: number = 1,
          paramEndIndex: number = value.length

        if (
          macro.declarationLines.findIndex(
            (dl) => dl.indexOf(trimedParam) !== -1
          ) === -1
        ) {
          const comment = '/\\*(.*?)\\*/'
          for (let i = 1; i < trimedParam.length; i++) {
            const paramWithComment =
              trimedParam.slice(0, i) + comment + trimedParam.slice(i)
            const regEx = new RegExp(paramWithComment)

            const declarationLineIndex = macro.declarationLines.findIndex(
              (dl) => !!regEx.exec(dl)
            )

            if (declarationLineIndex !== -1) {
              const declarationLine =
                macro.declarationLines[declarationLineIndex]
              const partFound = regEx.exec(declarationLine)![0]

              paramLineNumber = macro.startLineNumbers[declarationLineIndex]
              paramStartIndex = declarationLine.indexOf(partFound)
              paramEndIndex =
                declarationLine.indexOf(partFound) + partFound.length
              break
            }
          }
        } else {
          const declarationLineIndex = macro.declarationLines.findIndex(
            (dl) => dl.indexOf(trimedParam) !== -1
          )
          const declarationLine = macro.declarationLines[declarationLineIndex]
          paramLineNumber = macro.startLineNumbers[declarationLineIndex]

          paramStartIndex = declarationLine.indexOf(trimedParam)
          paramEndIndex =
            declarationLine.indexOf(trimedParam) + trimedParam.length
        }

        if (trimedParam.includes(' ')) {
          diagnostics.push({
            message: `Param '${trimedParam}' cannot have space`,
            lineNumber: paramLineNumber,
            startColumnNumber: paramStartIndex + 1,
            endColumnNumber: paramEndIndex,
            severity: Severity.Warning
          })
        }
      })

      _declaration = declaration.split(`(${paramsPresent})`)[1]
    }

    const optionsPresent = _declaration.split('/')?.[1]?.trim().split(' ')

    optionsPresent
      ?.filter((o) => !!o)
      .forEach((option) => {
        const trimmedOption = option.trim()
        if (!validOptions.includes(trimmedOption.toUpperCase())) {
          const declarationLineIndex = macro.declarationLines.findIndex(
            (dl) => dl.indexOf(trimmedOption) !== -1
          )
          const declarationLine = macro.declarationLines[declarationLineIndex]

          diagnostics.push({
            message: `Option '${trimmedOption}' is not valid`,
            lineNumber: macro.startLineNumbers[declarationLineIndex],
            startColumnNumber: declarationLine.indexOf(trimmedOption) + 1,
            endColumnNumber:
              declarationLine.indexOf(trimmedOption) + trimmedOption.length,
            severity: Severity.Warning
          })
        }
      })
  })

  return diagnostics
}

/**
 * Lint rule that checks if a line has followed syntax for macro definition
 */
export const strictMacroDefinition: FileLintRule = {
  type: LintRuleType.File,
  name,
  description,
  message,
  test
}