import {
  validateAnyToNumber,
  validateAnyToString,
  validateArray,
  validateChoice,
  validateFunction,
  validateKeyValueDictionary,
  validateMaybeTrimmedString,
  validateMissing,
  validateNonEmptyTrimmedString,
  validateOption,
  validateTuple,
} from "@biryani/core"

import { IndicatorNodeType } from "../indicators"

export const validateIndicatorData = validateOption(
  [
    validateArray(validateTuple(validateAnyToString, validateAnyToNumber)),
    validateFunction(Object.fromEntries),
  ],
  validateKeyValueDictionary(validateAnyToString, validateAnyToNumber),
)

export function validateIndicatorDimension(data: any): [any, any] {
  if (data === null || data === undefined) {
    return [data, "Missing value"]
  }
  if (typeof data !== "object") {
    return [data, `Expected an object, got ${typeof data}`]
  }

  data = {
    ...data,
  }
  const remainingKeys = new Set(Object.keys(data))
  const errors: { [key: string]: any } = {}

  for (const key of ["keyField", "path"]) {
    remainingKeys.delete(key)
    const [value, error] = validateNonEmptyTrimmedString(data[key])
    data[key] = value
    if (error !== null) {
      errors[key] = error
    }
  }

  {
    const key = "labelField"
    remainingKeys.delete(key)
    const [value, error] = validateMaybeTrimmedString(data[key])
    data[key] = value
    if (error !== null) {
      errors[key] = error
    }
  }

  for (const key of remainingKeys) {
    errors[key] = "Unexpected entry"
  }
  return [data, Object.keys(errors).length === 0 ? null : errors]
}

export function validateIndicatorNode(data: any): [any, any] {
  if (data === null || data === undefined) {
    return [data, "Missing value"]
  }
  if (typeof data !== "object") {
    return [data, `Expected an object, got ${typeof data}`]
  }

  data = {
    ...data,
  }
  const remainingKeys = new Set(Object.keys(data))
  const errors: { [key: string]: any } = {}

  {
    const key = "description"
    remainingKeys.delete(key)
    const [value, error] = validateMaybeTrimmedString(data[key])
    if (value === null) {
      delete data[key]
    } else {
      data[key] = value
    }
    if (error !== null) {
      errors[key] = error
    }
  }

  {
    const key = "name"
    remainingKeys.delete(key)
    const [value, error] = validateNonEmptyTrimmedString(data[key])
    data[key] = value
    if (error !== null) {
      errors[key] = error
    }
  }

  {
    const key = "path"
    remainingKeys.delete(key)
    const [value, error] = validateNonEmptyTrimmedString(data[key])
    data[key] = value
    if (error !== null) {
      errors[key] = error
    }
  }

  {
    const key = "type"
    remainingKeys.delete(key)
    const [value, error] = validateChoice([
      IndicatorNodeType.Indicator,
      IndicatorNodeType.Group,
    ])(data[key])
    data[key] = value
    if (error !== null) {
      errors[key] = error
    }
  }

  if (errors.type === undefined && data.type === IndicatorNodeType.Indicator) {
    {
      const key = "data"
      remainingKeys.delete(key)
      const [value, error] = validateOption(
        validateMissing,
        validateIndicatorData,
      )(data[key])
      if (value === null) {
        delete data[key]
      } else {
        data[key] = value
      }
      if (error !== null) {
        errors[key] = error
      }
    }

    {
      const key = "dimensions"
      remainingKeys.delete(key)
      const [value, error] = validateArray(validateIndicatorDimension)(
        data[key],
      )
      data[key] = value
      if (error !== null) {
        errors[key] = error
      }
    }
  }

  for (const key of remainingKeys) {
    errors[key] = "Unexpected entry"
  }
  return [data, Object.keys(errors).length === 0 ? null : errors]
}