// @ts-nocheck
/**
 * Copyright (c) Nicolas Gallagher.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict-local
 */

import { simpleHash } from '@tamagui/simple-hash'

import createReactDOMStyle from './createReactDOMStyle'
import hyphenateStyleName from './hyphenateStyleName'
import normalizeValueWithProperty from './normalizeValueWithProperty'

type Value = Object | Array<any> | string | number

type Style = {
  [K in string]: Value
}

type Rule = string
type Rules = Array<Rule>
type RulesData = [Rules, number]

type CompiledStyle = {
  [K in string]: string | Array<string>
}

type CompilerOutput = [CompiledStyle, Array<RulesData>]

const cache = new Map()
const emptyObject = {}

const classicGroup = 1
const atomicGroup = 2.2
const customGroup: {
  [K in string]: number
} = {
  borderColor: 2,
  borderRadius: 2,
  borderStyle: 2,
  borderWidth: 2,
  display: 2,
  flex: 2,
  margin: 2,
  overflow: 2,
  overscrollBehavior: 2,
  padding: 2,
  marginHorizontal: 2.1,
  marginVertical: 2.1,
  paddingHorizontal: 2.1,
  paddingVertical: 2.1,
}

const borderTopLeftRadius = 'borderTopLeftRadius'
const borderTopRightRadius = 'borderTopRightRadius'
const borderBottomLeftRadius = 'borderBottomLeftRadius'
const borderBottomRightRadius = 'borderBottomRightRadius'
const borderLeftColor = 'borderLeftColor'
const borderLeftStyle = 'borderLeftStyle'
const borderLeftWidth = 'borderLeftWidth'
const borderRightColor = 'borderRightColor'
const borderRightStyle = 'borderRightStyle'
const borderRightWidth = 'borderRightWidth'
const right = 'right'
const marginLeft = 'marginLeft'
const marginRight = 'marginRight'
const paddingLeft = 'paddingLeft'
const paddingRight = 'paddingRight'
const left = 'left'

// Map of LTR property names to their BiDi equivalent.
const PROPERTIES_FLIP: {
  [K in string]: string
} = {
  [borderTopLeftRadius]: borderTopRightRadius,
  [borderTopRightRadius]: borderTopLeftRadius,
  [borderBottomLeftRadius]: borderBottomRightRadius,
  [borderBottomRightRadius]: borderBottomLeftRadius,
  [borderLeftColor]: borderRightColor,
  [borderLeftStyle]: borderRightStyle,
  [borderLeftWidth]: borderRightWidth,
  [borderRightColor]: borderLeftColor,
  [borderRightStyle]: borderLeftStyle,
  [borderRightWidth]: borderLeftWidth,
  [left]: right,
  [marginLeft]: marginRight,
  [marginRight]: marginLeft,
  [paddingLeft]: paddingRight,
  [paddingRight]: paddingLeft,
  [right]: left,
}

// Map of I18N property names to their LTR equivalent.
const PROPERTIES_I18N: {
  [K in string]: string
} = {
  borderTopStartRadius: borderTopLeftRadius,
  borderTopEndRadius: borderTopRightRadius,
  borderBottomStartRadius: borderBottomLeftRadius,
  borderBottomEndRadius: borderBottomRightRadius,
  borderStartColor: borderLeftColor,
  borderStartStyle: borderLeftStyle,
  borderStartWidth: borderLeftWidth,
  borderEndColor: borderRightColor,
  borderEndStyle: borderRightStyle,
  borderEndWidth: borderRightWidth,
  end: right,
  marginStart: marginLeft,
  marginEnd: marginRight,
  paddingStart: paddingLeft,
  paddingEnd: paddingRight,
  start: left,
}

const PROPERTIES_VALUE = ['clear', 'float', 'textAlign']

export function atomic(style: Style): CompilerOutput {
  const compiledStyle: CompiledStyle = { $$css: true }
  const compiledRules = []

  function atomicCompile(prop, value) {
    const valueString = stringifyValueWithProperty(value, prop)
    const cacheKey = prop + valueString
    const cachedResult = cache.get(cacheKey)
    let identifier
    if (cachedResult != null) {
      identifier = cachedResult[0]
      compiledRules.push(cachedResult[1])
    } else {
      identifier = createIdentifier('r', prop, value)
      const order = customGroup[prop] || atomicGroup
      const rules = createAtomicRules(identifier, prop, value)
      const orderedRules = [rules, order]
      compiledRules.push(orderedRules)
      cache.set(cacheKey, [identifier, orderedRules])
    }
    return identifier
  }

  Object.keys(style)
    .sort()
    .forEach((prop) => {
      const value = style[prop]
      if (value != null) {
        let localizeableValue
        // BiDi flip values
        if (PROPERTIES_VALUE.indexOf(prop) > -1) {
          const left = atomicCompile(prop, 'left')
          const right = atomicCompile(prop, 'right')
          if (value === 'start') {
            localizeableValue = [left, right]
          } else if (value === 'end') {
            localizeableValue = [right, left]
          }
        }
        // BiDi flip properties
        const propPolyfill = PROPERTIES_I18N[prop]
        if (propPolyfill != null) {
          const ltr = atomicCompile(propPolyfill, value)
          const rtl = atomicCompile(PROPERTIES_FLIP[propPolyfill], value)
          localizeableValue = [ltr, rtl]
        }
        // BiDi flip transitionProperty value
        if (prop === 'transitionProperty') {
          const values = Array.isArray(value) ? value : [value]
          const polyfillIndices = []

          for (let i = 0; i < values.length; i++) {
            const val = values[i]
            if (typeof val === 'string' && PROPERTIES_I18N[val] != null) {
              polyfillIndices.push(i)
            }
          }

          if (polyfillIndices.length > 0) {
            const ltrPolyfillValues = [...values]
            const rtlPolyfillValues = [...values]
            polyfillIndices.forEach((i) => {
              const ltrVal = ltrPolyfillValues[i]
              if (typeof ltrVal === 'string') {
                const ltrPolyfill = PROPERTIES_I18N[ltrVal]
                const rtlPolyfill = PROPERTIES_FLIP[ltrPolyfill]
                ltrPolyfillValues[i] = ltrPolyfill
                rtlPolyfillValues[i] = rtlPolyfill
                const ltr = atomicCompile(prop, ltrPolyfillValues)
                const rtl = atomicCompile(prop, rtlPolyfillValues)
                localizeableValue = [ltr, rtl]
              }
            })
          }
        }

        if (localizeableValue == null) {
          localizeableValue = atomicCompile(prop, value)
        } else {
          compiledStyle['$$css$localize'] = true
        }

        compiledStyle[prop] = localizeableValue
      }
    })

  return [compiledStyle, compiledRules]
}

/**
 * Compile simple style object to classic CSS rules.
 * No support for 'placeholderTextColor', 'scrollbarWidth', or 'pointerEvents'.
 */
export function classic(style: Style, name: string): CompilerOutput {
  const compiledStyle = { $$css: true }
  const compiledRules = []

  const { animationKeyframes, ...rest } = style
  const identifier = createIdentifier('css', name, style)
  const selector = `.${identifier}`
  let animationName
  if (animationKeyframes != null) {
    const [animationNames, keyframesRules] = processKeyframesValue(animationKeyframes)
    animationName = animationNames.join(',')
    compiledRules.push(...keyframesRules)
  }
  const block = createDeclarationBlock({ ...rest, animationName })
  compiledRules.push(`${selector}${block}`)

  compiledStyle[identifier] = identifier
  return [compiledStyle, [[compiledRules, classicGroup]]]
}

/**
 * Compile simple style object to inline DOM styles.
 * No support for 'animationKeyframes', 'placeholderTextColor', 'scrollbarWidth', or 'pointerEvents'.
 */
export function inline(
  originalStyle: Style,
  isRTL?: boolean
): {
  [K in string]: unknown
} {
  const style = originalStyle || emptyObject
  const frozenProps = {}
  const nextStyle = {}

  for (const originalProp in style) {
    const originalValue = style[originalProp]
    let prop = originalProp
    let value = originalValue

    if (
      !Object.prototype.hasOwnProperty.call(style, originalProp) ||
      originalValue == null
    ) {
      continue
    }

    // BiDi flip values
    if (PROPERTIES_VALUE.indexOf(originalProp) > -1) {
      if (originalValue === 'start') {
        value = isRTL ? 'right' : 'left'
      } else if (originalValue === 'end') {
        value = isRTL ? 'left' : 'right'
      }
    }
    // BiDi flip properties
    const propPolyfill = PROPERTIES_I18N[originalProp]
    if (propPolyfill != null) {
      prop = isRTL ? PROPERTIES_FLIP[propPolyfill] : propPolyfill
    }
    // BiDi flip transitionProperty value
    if (originalProp === 'transitionProperty') {
      // @ts-ignore
      const originalValues = Array.isArray(originalValue)
        ? originalValue
        : [originalValue]
      originalValues.forEach((val, i) => {
        if (typeof val === 'string') {
          const valuePolyfill = PROPERTIES_I18N[val]
          if (valuePolyfill != null) {
            originalValues[i] = isRTL ? PROPERTIES_FLIP[valuePolyfill] : valuePolyfill
          }
        }
      })
    }

    // Create finalized style
    if (!frozenProps[prop]) {
      nextStyle[prop] = value
    }

    if (PROPERTIES_I18N.hasOwnProperty(originalProp)) {
      frozenProps[prop] = true
    }
  }

  return createReactDOMStyle(nextStyle, true)
}

/**
 * Create a value string that normalizes different input values with a common
 * output.
 */
export function stringifyValueWithProperty(
  value: Value,
  property: string | null
): string {
  // e.g., 0 => '0px', 'black' => 'rgba(0,0,0,1)'
  const normalizedValue = normalizeValueWithProperty(value, property)
  return typeof normalizedValue !== 'string'
    ? JSON.stringify(normalizedValue || '')
    : normalizedValue
}

/**
 * Create the Atomic CSS rules needed for a given StyleSheet rule.
 * Translates StyleSheet declarations to CSS.
 */
function createAtomicRules(identifier: string, property, value): Rules {
  const rules = []
  const selector = `.${identifier}`

  // Handle non-standard properties and object values that require multiple
  // CSS rules to be created.
  switch (property) {
    case 'animationKeyframes': {
      const [animationNames, keyframesRules] = processKeyframesValue(value)
      const block = createDeclarationBlock({
        animationName: animationNames.join(','),
      })
      rules.push(`${selector}${block}`, ...keyframesRules)
      break
    }

    // Equivalent to using '::placeholder'
    case 'placeholderTextColor': {
      const block = createDeclarationBlock({ color: value, opacity: 1 })
      rules.push(
        `${selector}::-webkit-input-placeholder${block}`,
        `${selector}::-moz-placeholder${block}`,
        `${selector}:-ms-input-placeholder${block}`,
        `${selector}::placeholder${block}`
      )
      break
    }

    // Polyfill for additional 'pointer-events' values
    // See d13f78622b233a0afc0c7a200c0a0792c8ca9e58
    case 'pointerEvents': {
      let finalValue = value
      if (value === 'auto' || value === 'box-only') {
        finalValue = 'auto!important'
        if (value === 'box-only') {
          const block = createDeclarationBlock({ pointerEvents: 'none' })
          rules.push(`${selector}>*${block}`)
        }
      } else if (value === 'none' || value === 'box-none') {
        finalValue = 'none!important'
        if (value === 'box-none') {
          const block = createDeclarationBlock({ pointerEvents: 'auto' })
          rules.push(`${selector}>*${block}`)
        }
      }
      const block = createDeclarationBlock({ pointerEvents: finalValue })
      rules.push(`${selector}${block}`)
      break
    }

    // Polyfill for draft spec
    // https://drafts.csswg.org/css-scrollbars-1/
    case 'scrollbarWidth': {
      if (value === 'none') {
        rules.push(`${selector}::-webkit-scrollbar{display:none}`)
      }
      const block = createDeclarationBlock({ scrollbarWidth: value })
      rules.push(`${selector}${block}`)
      break
    }

    default: {
      const block = createDeclarationBlock({ [property]: value })
      rules.push(`${selector}${block}`)
      break
    }
  }

  return rules
}

/**
 * Creates a CSS declaration block from a StyleSheet object.
 */
function createDeclarationBlock(style: Style): string {
  const domStyle = createReactDOMStyle(style)

  const declarationsString = Object.keys(domStyle)
    .map((property) => {
      const value = domStyle[property]
      const prop = hyphenateStyleName(property)
      // The prefixer may return an array of values:
      // { display: [ '-webkit-flex', 'flex' ] }
      // to represent "fallback" declarations
      // { display: -webkit-flex; display: flex; }
      if (Array.isArray(value)) {
        return value.map((v) => `${prop}:${v}`).join(';')
      } else {
        return `${prop}:${value}`
      }
    })
    // Once properties are hyphenated, this will put the vendor
    // prefixed and short-form properties first in the list.
    .sort()
    .join(';')

  return `{${declarationsString};}`
}

/**
 * An identifier is associated with a unique set of styles.
 */
function createIdentifier(prefix: string, name: string, value: Value): string {
  const hashedString = simpleHash(name + stringifyValueWithProperty(value, name))
  return process.env.NODE_ENV !== 'production'
    ? `${prefix}-${name}-${hashedString}`
    : `${prefix}-${hashedString}`
}

/**
 * Create individual CSS keyframes rules.
 */
function createKeyframes(keyframes: Object): [string, Rules] {
  const prefixes = ['-webkit-', '']
  const identifier = createIdentifier('r', 'animation', keyframes)

  const steps =
    '{' +
    Object.keys(keyframes)
      .map((stepName) => {
        const rule = keyframes[stepName]
        const block = createDeclarationBlock(rule)
        return `${stepName}${block}`
      })
      .join('') +
    '}'

  const rules = prefixes.map((prefix) => {
    return `@${prefix}keyframes ${identifier}${steps}`
  })
  return [identifier, rules]
}

/**
 * Create CSS keyframes rules and names from a StyleSheet keyframes object.
 */
function processKeyframesValue(keyframesValue) {
  if (typeof keyframesValue === 'number') {
    throw new Error(`Invalid CSS keyframes type: ${typeof keyframesValue}`)
  }

  const animationNames = []
  const rules = []
  const value = Array.isArray(keyframesValue) ? keyframesValue : [keyframesValue]

  value.forEach((keyframes) => {
    if (typeof keyframes === 'string') {
      // Support external animation libraries (identifiers only)
      animationNames.push(keyframes)
    } else {
      // Create rules for each of the keyframes
      const [identifier, keyframesRules] = createKeyframes(keyframes)
      animationNames.push(identifier)
      rules.push(...keyframesRules)
    }
  })

  return [animationNames, rules]
}