//
// Copyright © 2025 Hardcore Engineering Inc.
//
// Licensed under the Eclipse Public License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License. You may
// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//
// See the License for the specific language governing permissions and
// limitations under the License.
//

import contact, { Employee, Person } from '@hcengineering/contact'
import core, { Doc, matchQuery, Ref, Timestamp } from '@hcengineering/core'
import { Execution, parseContext } from '@hcengineering/process'
import { ProcessControl } from '@hcengineering/server-process'
import { getContextValue } from './utils'
import cardPlugin from '@hcengineering/card'

// #region ArrayReduce

export function FirstValue (value: Doc[]): Doc | undefined {
  if (!Array.isArray(value)) return value
  return value[0]
}

export function LastValue (value: Doc[]): Doc | undefined {
  if (!Array.isArray(value)) return value
  if (value.length === 0) return
  return value[value.length - 1]
}

export function Random (value: Doc[]): Doc {
  if (!Array.isArray(value)) return value
  return value[Math.floor(Math.random() * value.length)]
}

export function All (value: Doc[]): Doc[] {
  return value ?? []
}

export async function FirstMatchValue (
  value: any[],
  props: Record<string, any>,
  control: ProcessControl
): Promise<any | undefined> {
  if (value == null) {
    return
  }
  if (!Array.isArray(value)) return value
  const { _class, ...otherProps } = props
  if (_class == null) return
  if (value.length === 0) return
  if (typeof value[0] === 'string') {
    const docs = await control.client.findAll(_class, { _id: { $in: value } })
    return matchQuery(docs, otherProps, core.class.Doc, control.client.getHierarchy(), true)[0]?._id
  } else if (typeof value[0] === 'object') {
    return matchQuery(value, otherProps, core.class.Doc, control.client.getHierarchy(), true)[0]
  }
}

// #endregion

// #region Array

export async function Insert (
  value: any[],
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<any[]> {
  if (value == null) {
    value = []
  }
  if (!Array.isArray(value)) return value
  if (props.value == null) return value
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    Array.isArray(val) ? value.push(...val) : value.push(val)
  } else {
    value.push(props.value)
  }
  return value
}

export async function Remove (
  value: any[],
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<any[]> {
  if (value == null) {
    value = []
  }
  if (!Array.isArray(value)) return value
  if (props.value == null) return value
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    return value.filter((item) => item !== val)
  } else {
    return value.filter((item) => item !== props.value)
  }
}

export function RemoveFirst (value: any[]): any[] {
  if (value == null) {
    value = []
  }
  if (!Array.isArray(value)) return value
  return value.slice(1)
}

export function RemoveLast (value: any[]): any[] {
  if (value == null) {
    value = []
  }
  if (!Array.isArray(value)) return value
  return value.slice(0, -1)
}

export async function Filter (value: any[], props: Record<string, any>, control: ProcessControl): Promise<any[]> {
  if (value == null) {
    return []
  }
  if (!Array.isArray(value)) return value
  const { _class, ...otherProps } = props
  if (_class == null) return value
  if (value.length === 0) return value
  if (typeof value[0] === 'string') {
    const docs = await control.client.findAll(_class, { _id: { $in: value } })
    return matchQuery(docs, otherProps, core.class.Doc, control.client.getHierarchy(), true).map((p) => p._id)
  } else if (typeof value[0] === 'object') {
    return matchQuery(value, otherProps, core.class.Doc, control.client.getHierarchy(), true)
  }
  return value
}

// #endregion

// #region String

export function UpperCase (value: string): string {
  if (typeof value !== 'string') return value
  return value.toUpperCase()
}

export function LowerCase (value: string): string {
  if (typeof value !== 'string') return value
  return value.toLowerCase()
}

export function Trim (value: string): string {
  if (typeof value !== 'string') return value
  return value.trim()
}

export async function Prepend (
  value: string,
  props: Record<string, string>,
  control: ProcessControl,
  execution: Execution
): Promise<string> {
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    if (typeof val !== 'string') return value
    return val + value
  } else if (typeof value === 'string') {
    return props.value + value
  }
  return value
}

export async function Append (
  value: string,
  props: Record<string, string>,
  control: ProcessControl,
  execution: Execution
): Promise<string> {
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    if (typeof val !== 'string') return value
    return value + val
  } else if (typeof value === 'string') {
    return value + props.value
  }
  return value
}

export function Replace (value: string, props: Record<string, string>): string {
  if (typeof value !== 'string') return value
  return value.replace(props.search, props.replacement)
}

export function ReplaceAll (value: string, props: Record<string, string>): string {
  if (typeof value !== 'string') return value
  return value.replaceAll(props.search, props.replacement)
}

export function Split (value: string, props: Record<string, string>): string {
  if (typeof value !== 'string') return value
  return value.split(props.separator)[0]
}

export function Cut (value: string, props: Record<string, number>): string {
  if (typeof value !== 'string') return value
  const start = props.start ?? 1
  const end = props.end ?? value.length + 1
  return value.slice(start - 1, end)
}

// #endregion

// #region Dates

export function FirstWorkingDayAfter (val: Timestamp): Timestamp {
  if (typeof val !== 'number') return val
  const value = new Date(val)
  const day = value.getUTCDay()
  if (day === 6 || day === 0) {
    const date = value.getDate() + (day === 6 ? 2 : 1)
    const res = value.setDate(date)
    return res
  }
  return val
}

export function Offset (val: Timestamp, props: Record<string, any>): Timestamp {
  if (typeof val !== 'number') return val
  const value = new Date(val)
  const offset = props.offset * (props.direction === 'after' ? 1 : -1)
  switch (props.offsetType) {
    case 'days':
      return value.setDate(value.getDate() + offset)
    case 'weeks':
      return value.setDate(value.getDate() + 7 * offset)
    case 'months':
      return value.setMonth(value.getMonth() + offset)
  }
  return val
}

export async function DateDifference (
  value: Timestamp,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<number> {
  if (typeof value !== 'number') return 0
  const otherDate = await getContextValue(props.otherDate, control, execution)
  if (typeof otherDate !== 'number') return 0

  const diff = value - otherDate
  const v = new Date(value)
  const o = new Date(otherDate)
  switch (props.unit) {
    case 'hours':
      return Math.floor(diff / (1000 * 60 * 60))
    case 'weeks':
      return Math.floor(diff / (1000 * 60 * 60 * 24 * 7))
    case 'months':
      return (v.getUTCFullYear() - o.getUTCFullYear()) * 12 + (v.getUTCMonth() - o.getUTCMonth())
    case 'years':
      return v.getUTCFullYear() - o.getUTCFullYear()
    case 'days':
    default:
      return Math.floor(diff / (1000 * 60 * 60 * 24))
  }
}

// #endregion

// #region Numbers

export async function Add (
  value: number,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<number> {
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    if (typeof val !== 'number') return value
    return value + val
  } else if (typeof value === 'number' && typeof props.value === 'number') {
    return value + props.value
  }
  return value
}

export async function Subtract (
  value: number,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<number> {
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    if (typeof val !== 'number') return value
    return value - val
  } else if (typeof value === 'number' && typeof props.value === 'number') {
    return value - props.value
  }
  return value
}

export async function Multiply (
  value: number,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<number> {
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    if (typeof val !== 'number') return value
    return value * val
  } else if (typeof value === 'number' && typeof props.value === 'number') {
    return value * props.value
  }
  return value
}

export async function Divide (
  value: number,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<number> {
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    if (val === 0 || typeof val !== 'number') {
      return value // Avoid division by zero
    }
    return value / val
  } else if (typeof value === 'number' && typeof props.value === 'number') {
    if (props.value === 0) {
      return value // Avoid division by zero
    }
    return value / props.value
  }
  return value
}

export async function Modulo (
  value: number,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<number> {
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    if (val === 0 || typeof val !== 'number') {
      return value // Avoid division by zero
    }
    return value % val
  } else if (typeof value === 'number' && typeof props.value === 'number') {
    if (props.value === 0) {
      return value // Avoid division by zero
    }
    return value % props.value
  }
  return value
}

export async function Power (
  value: number,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<number> {
  const context = parseContext(props.value)
  if (context !== undefined) {
    const val = await getContextValue(props.value, control, execution)
    if (typeof val !== 'number') return value
    return Math.pow(value, val)
  } else if (typeof value === 'number' && typeof props.value === 'number') {
    return Math.pow(value, props.value)
  }
  return value
}

export function Sqrt (value: number): number {
  if (typeof value === 'number') {
    return Math.sqrt(value)
  }
  return value
}

export function Round (value: number): number {
  if (typeof value === 'number') {
    return Math.round(value)
  }
  return value
}

export function Absolute (value: number): number {
  if (typeof value === 'number') {
    return Math.abs(value)
  }
  return value
}

export function Ceil (value: number): number {
  if (typeof value === 'number') {
    return Math.ceil(value)
  }
  return value
}

export function Floor (value: number): number {
  if (typeof value === 'number') {
    return Math.floor(value)
  }
  return value
}

// #endregion

// #region Func

export async function RoleContext (
  value: null,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<Ref<Employee>[]> {
  const targetRole = props.target
  if (targetRole === undefined) return []
  const targetCard =
    control.cache.get(execution.card) ?? (await control.client.findOne(cardPlugin.class.Card, { _id: execution.card }))
  if (targetCard === undefined) return []
  const targetSpace =
    control.cache.get(targetCard.space) ?? (await control.client.findOne(core.class.Space, { _id: targetCard.space }))
  if (targetSpace === undefined) return []
  const mixin = control.client.getHierarchy().as(targetSpace, core.mixin.SpacesTypeData)
  const accs = (mixin as any)[targetRole]
  if (accs === undefined || accs.length === 0) return []
  const users = await control.client.findAll(contact.mixin.Employee, { personUuid: { $in: accs } })
  return users.map((it) => it._id)
}

export async function CurrentUser (
  value: null,
  props: Record<string, any>,
  control: ProcessControl
): Promise<Ref<Person> | undefined> {
  const socialId = await control.client.findOne(contact.class.SocialIdentity, { _id: control.client.user as any })
  return socialId?.attachedTo
}

export async function CurrentDate (): Promise<Timestamp> {
  return Date.now()
}

export function EmptyArray (): any[] {
  return []
}

export async function ExecutionInitiator (
  value: null,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<Ref<Person> | undefined> {
  const socialId = await control.client.findOne(contact.class.SocialIdentity, {
    _id: (execution.createdBy ?? execution.modifiedBy) as any
  })
  return socialId?.attachedTo
}

export async function ExecutionStarted (
  value: null,
  props: Record<string, any>,
  control: ProcessControl,
  execution: Execution
): Promise<Timestamp> {
  return execution.createdOn ?? execution.modifiedOn
}

// #endregion

// #region Convert

export function StringFromNumber (value: number): string {
  if (value == null) return ''
  return String(value)
}

export function StringFromDate (value: Timestamp): string {
  if (value == null) return ''
  return new Date(value).toISOString()
}

export function StringFromBoolean (value: boolean): string {
  if (value == null) return ''
  return String(value)
}

export function NumberFromDate (value: Timestamp): number {
  return value
}

export function DateFromNumber (value: number): Date {
  return new Date(value)
}

export function NumberFromString (value: string): number {
  return Number(value)
}

export function DateFromString (value: string): Date {
  return new Date(value)
}

export function YearFromDate (value: Date): number {
  return new Date(value).getFullYear()
}

export function MonthFromDate (value: Date): number {
  return new Date(value).getMonth() + 1
}

export function DayFromDate (value: Date): number {
  return new Date(value).getDate()
}

// #endregion