import EventEmitter from 'events'

export type SupportedLexer =
  | 'HandlebarsLexer'
  | 'HTMLLexer'
  | 'JavascriptLexer'
  | 'JsxLexer'

// BaseLexer is not importable therefore this is the best if done simple
export class CustomLexerClass extends EventEmitter {}
export type CustomLexer = typeof CustomLexerClass

export interface CustomLexerConfig extends Record<string, unknown> {
  lexer: CustomLexer
}

export interface HandlebarsLexerConfig {
  lexer: 'HandlebarsLexer'
  functions?: string[]
}

export interface HTMLLexerConfig {
  lexer: 'HTMLLexer'
  functions?: string[]
  attr?: string
  optionAttr?: string
}

export interface JavascriptLexerConfig {
  lexer: 'JavascriptLexer'
  functions?: string[]
  namespaceFunctions?: string[]
  attr?: string
  parseGenerics?: false
  typeMap?: Record<string, unknown>
}

export interface JavascriptWithTypesLexerConfig {
  lexer: 'JavascriptLexer'
  functions?: string[]
  namespaceFunctions?: string[]
  attr?: string
  parseGenerics: true
  typeMap: Record<string, unknown>
}

export interface JsxLexerConfig {
  lexer: 'JsxLexer'
  functions?: string[]
  namespaceFunctions?: string[]
  componentFunctions?: string[]
  attr?: string
  transSupportBasicHtmlNodes?: boolean
  transKeepBasicHtmlNodesFor?: string[]
  parseGenerics?: false
  typeMap?: Record<string, unknown>
}

export interface JsxWithTypesLexerConfig {
  lexer: 'JsxLexer'
  functions?: string[]
  namespaceFunctions?: string[]
  componentFunctions?: string[]
  attr?: string
  transSupportBasicHtmlNodes?: boolean
  transKeepBasicHtmlNodesFor?: string[]
  parseGenerics: true
  typeMap: Record<string, unknown>
  /**
   * Identity functions within trans that should be parsed for their
   * first arguments. Used for making typecheckers happy in a safe way: e.g., if in your code, you use:
   *
   * ```
   * <Trans>Hello {castToString({ name })}</Trans>
   * ```
   *
   * you'd want to pass in `transIdentityFunctionsToIgnore: ['castToString']`
   */
  transIdentityFunctionsToIgnore?: string[]
}

export type LexerConfig =
  | HandlebarsLexerConfig
  | HTMLLexerConfig
  | JavascriptLexerConfig
  | JavascriptWithTypesLexerConfig
  | JsxLexerConfig
  | JsxWithTypesLexerConfig
  | CustomLexerConfig

export interface UserConfig {
  contextSeparator?: string
  createOldCatalogs?: boolean
  defaultNamespace?: string
  defaultValue?:
    | string
    | ((
        locale?: string,
        namespace?: string,
        key?: string,
        value?: string
      ) => string)
  indentation?: number
  keepRemoved?: boolean | readonly RegExp[]
  keySeparator?: string | false
  lexers?: {
    hbs?: (SupportedLexer | CustomLexer | LexerConfig)[]
    handlebars?: (SupportedLexer | CustomLexer | LexerConfig)[]
    htm?: (SupportedLexer | CustomLexer | LexerConfig)[]
    html?: (SupportedLexer | CustomLexer | LexerConfig)[]
    mjs?: (SupportedLexer | CustomLexer | LexerConfig)[]
    js?: (SupportedLexer | CustomLexer | LexerConfig)[]
    ts?: (SupportedLexer | CustomLexer | LexerConfig)[]
    jsx?: (SupportedLexer | CustomLexer | LexerConfig)[]
    tsx?: (SupportedLexer | CustomLexer | LexerConfig)[]
    default?: (SupportedLexer | CustomLexer | LexerConfig)[]
  }
  lineEnding?: 'auto' | 'crlf' | '\r\n' | 'cr' | '\r' | 'lf' | '\n'
  locales?: string[]
  namespaceSeparator?: string | false
  output?: string
  pluralSeparator?: string
  input?: string | string[]
  sort?: boolean | ((a: string, b: string) => -1 | 0 | 1)
  verbose?: boolean
  failOnWarnings?: boolean
  failOnUpdate?: boolean
  customValueTemplate?: Record<string, string> | null
  resetDefaultValueLocale?: string | null
  i18nextOptions?: Record<string, unknown> | null
  yamlOptions?: Record<string, unknown> | null
}