const { joiValidator } = require("@budibase/backend-core/auth")
const { DataSourceOperation } = require("../../../constants")
const {
  BuiltinPermissionID,
  PermissionLevel,
} = require("@budibase/backend-core/permissions")
const { WebhookActionType } = require("@budibase/types")
const Joi = require("joi")

const OPTIONAL_STRING = Joi.string().optional().allow(null).allow("")
const OPTIONAL_NUMBER = Joi.number().optional().allow(null)
const OPTIONAL_BOOLEAN = Joi.boolean().optional().allow(null)
const APP_NAME_REGEX = /^[\w\s]+$/

exports.tableValidator = () => {
  // prettier-ignore
  return joiValidator.body(Joi.object({
    _id: OPTIONAL_STRING,
    _rev: OPTIONAL_STRING,
    type: OPTIONAL_STRING.valid("table", "internal", "external"),
    primaryDisplay: OPTIONAL_STRING,
    schema: Joi.object().required(),
    name: Joi.string().required(),
    views: Joi.object(),
    dataImport: Joi.object(),
  }).unknown(true))
}

exports.nameValidator = () => {
  // prettier-ignore
  return joiValidator.body(Joi.object({
    name: OPTIONAL_STRING,
  }))
}

exports.datasourceValidator = () => {
  // prettier-ignore
  return joiValidator.body(Joi.object({
    _id: Joi.string(),
    _rev: Joi.string(),
    type: OPTIONAL_STRING.allow("datasource_plus"),
    relationships: Joi.array().items(Joi.object({
      from: Joi.string().required(),
      to: Joi.string().required(),
      cardinality: Joi.valid("1:N", "1:1", "N:N").required()
    })),
  }).unknown(true))
}

function filterObject() {
  // prettier-ignore
  return Joi.object({
    string: Joi.object().optional(),
    fuzzy: Joi.object().optional(),
    range: Joi.object().optional(),
    equal: Joi.object().optional(),
    notEqual: Joi.object().optional(),
    empty: Joi.object().optional(),
    notEmpty: Joi.object().optional(),
    oneOf: Joi.object().optional(),
    contains: Joi.object().optional(),
    notContains: Joi.object().optional(),
    allOr: Joi.boolean().optional(),
  }).unknown(true)
}

exports.internalSearchValidator = () => {
  // prettier-ignore
  return joiValidator.body(Joi.object({
    tableId: OPTIONAL_STRING,
    query: filterObject(),
    limit: OPTIONAL_NUMBER,
    sort: OPTIONAL_STRING,
    sortOrder: OPTIONAL_STRING,
    sortType: OPTIONAL_STRING,
    paginate: Joi.boolean(),
    bookmark: Joi.alternatives().try(OPTIONAL_STRING, OPTIONAL_NUMBER).optional(),
  }))
}

exports.externalSearchValidator = () => {
  return joiValidator.body(
    Joi.object({
      query: filterObject(),
      paginate: Joi.boolean().optional(),
      bookmark: Joi.alternatives()
        .try(OPTIONAL_STRING, OPTIONAL_NUMBER)
        .optional(),
      limit: OPTIONAL_NUMBER,
      sort: Joi.object({
        column: Joi.string(),
        order: OPTIONAL_STRING.valid("ascending", "descending"),
        type: OPTIONAL_STRING.valid("string", "number"),
      }).optional(),
    })
  )
}

exports.datasourceQueryValidator = () => {
  // prettier-ignore
  return joiValidator.body(Joi.object({
    endpoint: Joi.object({
      datasourceId: Joi.string().required(),
      operation: Joi.string().required().valid(...Object.values(DataSourceOperation)),
      entityId: Joi.string().required(),
    }).required(),
    resource: Joi.object({
      fields: Joi.array().items(Joi.string()).optional(),
    }).optional(),
    body: Joi.object().optional(),
    sort: Joi.object().optional(),
    filters: filterObject().optional(),
    paginate: Joi.object({
      page: Joi.string().alphanum().optional(),
      limit: Joi.number().optional(),
    }).optional(),
  }))
}

exports.webhookValidator = () => {
  // prettier-ignore
  return joiValidator.body(Joi.object({
    live: Joi.bool(),
    _id: OPTIONAL_STRING,
    _rev: OPTIONAL_STRING,
    name: Joi.string().required(),
    bodySchema: Joi.object().optional(),
    action: Joi.object({
      type: Joi.string().required().valid(WebhookActionType.AUTOMATION),
      target: Joi.string().required(),
    }).required(),
  }).unknown(true))
}

exports.roleValidator = () => {
  const permLevelArray = Object.values(PermissionLevel)
  // prettier-ignore
  return joiValidator.body(Joi.object({
    _id: OPTIONAL_STRING,
    _rev: OPTIONAL_STRING,
    name: Joi.string().required(),
    // this is the base permission ID (for now a built in)
    permissionId: Joi.string().valid(...Object.values(BuiltinPermissionID)).required(),
    permissions: Joi.object()
      .pattern(/.*/, [Joi.string().valid(...permLevelArray)])
      .optional(),
    inherits: OPTIONAL_STRING,
  }).unknown(true))
}

exports.permissionValidator = () => {
  const permLevelArray = Object.values(PermissionLevel)
  // prettier-ignore
  return joiValidator.params(Joi.object({
    level: Joi.string().valid(...permLevelArray).required(),
    resourceId: Joi.string(),
    roleId: Joi.string(),
  }).unknown(true))
}

exports.screenValidator = () => {
  // prettier-ignore
  return joiValidator.body(Joi.object({
    name: Joi.string().required(),
    showNavigation: OPTIONAL_BOOLEAN,
    width: OPTIONAL_STRING,
    routing: Joi.object({
      route: Joi.string().required(),
      roleId: Joi.string().required().allow(""),
      homeScreen: OPTIONAL_BOOLEAN,
    }).required().unknown(true),
    props: Joi.object({
      _id: Joi.string().required(),
      _component: Joi.string().required(),
      _children: Joi.array().required(),
      _styles: Joi.object().required(),
      type: OPTIONAL_STRING,
      table: OPTIONAL_STRING,
      layoutId: OPTIONAL_STRING,
    }).required().unknown(true),
  }).unknown(true))
}

function generateStepSchema(allowStepTypes) {
  // prettier-ignore
  return Joi.object({
    stepId: Joi.string().required(),
    id: Joi.string().required(),
    description: Joi.string().required(),
    name: Joi.string().required(),
    tagline: Joi.string().required(),
    icon: Joi.string().required(),
    params: Joi.object(),
    args: Joi.object(),
    type: Joi.string().required().valid(...allowStepTypes),
  }).unknown(true)
}

exports.automationValidator = (existing = false) => {
  // prettier-ignore
  return joiValidator.body(Joi.object({
    _id: existing ? Joi.string().required() : OPTIONAL_STRING,
    _rev: existing ? Joi.string().required() : OPTIONAL_STRING,
    name: Joi.string().required(),
    type: Joi.string().valid("automation").required(),
    definition: Joi.object({
      steps: Joi.array().required().items(generateStepSchema(["ACTION", "LOGIC"])),
      trigger: generateStepSchema(["TRIGGER"]).allow(null),
    }).required().unknown(true),
  }).unknown(true))
}

exports.applicationValidator = (opts = { isCreate: true }) => {
  // prettier-ignore
  const base = {
    _id: OPTIONAL_STRING,
    _rev: OPTIONAL_STRING,
    url: OPTIONAL_STRING,
    template: Joi.object({
      templateString: OPTIONAL_STRING,
    })
  }

  const appNameValidator = Joi.string()
    .pattern(new RegExp(APP_NAME_REGEX))
    .error(new Error("App name must be letters, numbers and spaces only"))
  if (opts.isCreate) {
    base.name = appNameValidator.required()
  } else {
    base.name = appNameValidator.optional()
  }

  return joiValidator.body(
    Joi.object({
      _id: OPTIONAL_STRING,
      _rev: OPTIONAL_STRING,
      name: appNameValidator,
      url: OPTIONAL_STRING,
      template: Joi.object({
        templateString: OPTIONAL_STRING,
      }).unknown(true),
    }).unknown(true)
  )
}