/*
Copyright (C) 2017  Cloudbase Solutions SRL
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/* eslint-disable no-param-reassign */

import Utils from '@src/utils/ObjectUtils'

import type { Field } from '@src/@types/Field'
import type { OptionValues, StorageMap } from '@src/@types/Endpoint'
import type { SchemaProperties, SchemaDefinitions } from '@src/@types/Schema'
import type { NetworkMap } from '@src/@types/Network'
import type { InstanceScript } from '@src/@types/Instance'
import { executionOptions, migrationFields } from '@src/constants'
import { UserScriptData } from '@src/@types/MainItem'
import { defaultSchemaToFields } from './ConnectionSchemaPlugin'

const migrationImageOsTypes = ['windows', 'linux']

export const defaultFillFieldValues = (field: Field, option: OptionValues) => {
  if (field.type === 'string') {
    field.enum = [...option.values]
    if (option.config_default) {
      field.default = typeof option.config_default === 'string' ? option.config_default : option.config_default.id
    }
  }
  if (field.type === 'array') {
    field.enum = [...option.values]
  }
  if (field.type === 'boolean' && option.config_default != null) {
    field.default = typeof option.config_default === 'boolean' ? option.config_default : option.config_default === 'true'
  }
}

export const defaultFillMigrationImageMapValues = (opts: {
  field: Field,
  option: OptionValues,
  migrationImageMapFieldName: string,
  requiresWindowsImage: boolean,
}): boolean => {
  const {
    field, option, migrationImageMapFieldName, requiresWindowsImage,
  } = opts
  if (field.name !== migrationImageMapFieldName) {
    return false
  }
  field.properties = migrationImageOsTypes.map(os => {
    const values = (option.values as any)
      .filter((v: { os_type: string }) => v.os_type === os || v.os_type === 'unknown')
      .sort((v1: { os_type: string }, v2: { os_type: string }) => {
        if (v1.os_type === 'unknown' && v2.os_type !== 'unknown') {
          return 1
        } if (v1.os_type !== 'unknown' && v2.os_type === 'unknown') {
          return -1
        }
        return 0
      })
    const unknownIndex = values.findIndex((v: { os_type: string }) => v.os_type === 'unknown')
    if (unknownIndex > -1 && values.filter((v: { os_type: string }) => v.os_type === 'unknown').length < values.length) {
      values.splice(unknownIndex, 0, { separator: true })
    }

    let defaultValue = null
    if (option?.config_default && Object.prototype.hasOwnProperty.call(option.config_default, os)) {
      // @ts-ignore
      defaultValue = option.config_default[os]
    }

    return {
      name: os,
      type: 'string',
      enum: values,
      default: defaultValue,
      required: os === 'linux' || (requiresWindowsImage && os === 'windows'),
    }
  })
  return true
}

export const defaultGetDestinationEnv = (
  options?: { [prop: string]: any } | null,
  oldOptions?: { [prop: string]: any } | null,
): any => {
  const env: any = {}
  const specialOptions = ['execute_now', 'execute_now_options', 'separate_vm', 'skip_os_morphing', 'title', 'minion_pool_id']
    .concat(migrationFields.map(f => f.name))
    .concat(executionOptions.map(o => o.name))
    .concat(migrationImageOsTypes)

  if (!options) {
    return env
  }

  Object.keys(options).forEach(optionName => {
    const value = options[optionName]
    if (specialOptions.find(o => o === optionName) || value == null || value === '') {
      return
    }
    if (Array.isArray(value)) {
      env[optionName] = value
    } else if (typeof value === 'object') {
      const oldValue = oldOptions?.[optionName] || {}
      const mergedValue: any = { ...oldValue, ...value }
      const newValue: any = {}
      Object.keys(mergedValue).forEach(k => {
        if (mergedValue[k] !== null) {
          newValue[k] = mergedValue[k]
        }
      })
      env[optionName] = newValue
    } else {
      env[optionName] = options ? Utils.trim(optionName, value) : null
    }
  })
  return env
}

export const defaultGetMigrationImageMap = (
  options: { [prop: string]: any } | null | undefined,
  oldOptions: any,
  migrationImageMapFieldName: string,
) => {
  const env: any = {}
  const usableOptions = options
  if (!usableOptions) {
    return env
  }

  const hasMigrationMap = Object.keys(usableOptions).find(k => k === migrationImageMapFieldName)
  if (!hasMigrationMap) {
    return env
  }
  migrationImageOsTypes.forEach(os => {
    let value = usableOptions[migrationImageMapFieldName][os]

    // Make sure the migr. image mapping has all the OSes filled,
    // even if only one OS mapping was updated,
    // ie. don't send just the updated OS map to the server, send them all if one was updated.
    if (!value) {
      value = oldOptions?.[migrationImageMapFieldName]?.[os]
      if (!value) {
        return
      }
    }

    if (!env[migrationImageMapFieldName]) {
      env[migrationImageMapFieldName] = {}
    }

    env[migrationImageMapFieldName][os] = value
  })

  return env
}

export default class OptionsSchemaParser {
  static migrationImageMapFieldName = 'migr_image_map'

  static parseSchemaToFields(opts: {
    schema: SchemaProperties,
    schemaDefinitions?: SchemaDefinitions | null,
    dictionaryKey?: string,
    requiresWindowsImage?: boolean,
  }) {
    const {
      schema, schemaDefinitions, dictionaryKey,
    } = opts
    return defaultSchemaToFields(schema, schemaDefinitions, dictionaryKey)
  }

  static sortFields(fields: Field[]) {
    fields.sort((a, b) => {
      if (a.required && !b.required) {
        return -1
      }

      if (!a.required && b.required) {
        return 1
      }

      return a.name.localeCompare(b.name)
    })
  }

  static fillFieldValues(opts: {
    field: Field,
    options: OptionValues[],
    requiresWindowsImage: boolean,
    customFieldName?: string,
  }) {
    const {
      field, options, requiresWindowsImage, customFieldName,
    } = opts

    const option = options.find(f => (customFieldName ? f.name === customFieldName : f.name === field.name))
    if (!option) {
      return
    }
    if (!defaultFillMigrationImageMapValues({
      field,
      option,
      migrationImageMapFieldName: this.migrationImageMapFieldName,
      requiresWindowsImage,
    })) {
      defaultFillFieldValues(field, option)
    }
  }

  static getDestinationEnv(options?: { [prop: string]: any } | null, oldOptions?: any) {
    const env = {
      ...defaultGetDestinationEnv(
        options,
        oldOptions,
      ),
      ...defaultGetMigrationImageMap(
        options,
        oldOptions,
        this.migrationImageMapFieldName,
      ),
    }
    return env
  }

  static getNetworkMap(networkMappings: NetworkMap[] | null | undefined) {
    const payload: any = {}
    if (!networkMappings?.length) {
      return payload
    }
    const hasSecurityGroups = Boolean(networkMappings.find(nm => nm.targetNetwork!.security_groups))
    networkMappings.forEach(mapping => {
      let target
      if (hasSecurityGroups) {
        target = {
          id: mapping.targetNetwork!.id,
          security_groups: mapping.targetSecurityGroups ? mapping.targetSecurityGroups.map(s => (typeof s === 'string' ? s : s.id)) : [],
        }
      } else if (mapping.targetPortKey != null) {
        target = `${mapping.targetNetwork!.id}:${mapping.targetPortKey}`
      } else {
        target = mapping.targetNetwork!.id
      }
      payload[mapping.sourceNic.network_name] = target
    })
    return payload
  }

  static getStorageMap(
    defaultStorage: { value: string | null, busType?: string | null } | undefined,
    storageMap?: StorageMap[] | null,
    configDefault?: string | null,
  ) {
    if (!defaultStorage?.value && !storageMap) {
      return null
    }

    const payload: any = {}
    if (defaultStorage?.value) {
      payload.default = defaultStorage.value
      if (defaultStorage.busType) {
        payload.default += `:${defaultStorage.busType}`
      }
    }

    if (!storageMap) {
      return payload
    }

    storageMap.forEach(mapping => {
      if (mapping.target.id === null && !configDefault) {
        return
      }

      const getDestination = () => {
        let destination = mapping.target.id === null ? configDefault : mapping.target.name
        if (mapping.targetBusType) {
          destination += `:${mapping.targetBusType}`
        }
        return destination
      }

      if (mapping.type === 'backend') {
        if (!payload.backend_mappings) {
          payload.backend_mappings = []
        }
        payload.backend_mappings.push({
          source: mapping.source.storage_backend_identifier,
          destination: getDestination(),
        })
      } else {
        if (!payload.disk_mappings) {
          payload.disk_mappings = []
        }
        payload.disk_mappings.push({
          disk_id: mapping.source.id.toString(),
          destination: getDestination(),
        })
      }
    })
    return payload
  }

  static getUserScripts(
    uploadedUserScripts: InstanceScript[],
    removedUserScripts: InstanceScript[],
    userScriptData: UserScriptData | null | undefined,
  ) {
    const payload: any = userScriptData || {}

    const setPayload = (scripts: InstanceScript[], scriptProp: 'global' | 'instanceId', payloadProp: 'global' | 'instances') => {
      if (!scripts.length) {
        return
      }
      payload[payloadProp] = payload[payloadProp] || {}
      scripts.forEach(script => {
        const scriptValue = script[scriptProp]
        if (!scriptValue) {
          throw new Error(`The uploaded script structure is missing the '${scriptProp}' property`)
        }
        payload[payloadProp][scriptValue] = script.scriptContent
      })
    }

    setPayload(removedUserScripts.filter(s => s.global), 'global', 'global')
    setPayload(removedUserScripts.filter(s => s.instanceId), 'instanceId', 'instances')
    setPayload(uploadedUserScripts.filter(s => s.global), 'global', 'global')
    setPayload(uploadedUserScripts.filter(s => s.instanceId), 'instanceId', 'instances')

    return payload
  }
}