import { err } from 'lib/trap'
import { KCL_DEFAULT_CONSTANT_PREFIXES } from 'lib/constants'
import {
  Program,
  PathToNode,
  Expr,
  CallExpression,
  VariableDeclarator,
  CallExpressionKw,
  ArtifactGraph,
} from 'lang/wasm'
import { Selections } from 'lib/selections'
import { Node } from 'wasm-lib/kcl/bindings/Node'
import {
  createLiteral,
  createCallExpressionStdLib,
  createObjectExpression,
  createIdentifier,
  findUniqueName,
  createVariableDeclaration,
} from 'lang/modifyAst'
import { getNodeFromPath } from 'lang/queryAst'
import { getNodePathFromSourceRange } from 'lang/queryAstNodePathUtils'
import {
  mutateAstWithTagForSketchSegment,
  getEdgeTagCall,
} from 'lang/modifyAst/addEdgeTreatment'
import { Artifact, getPathsFromArtifact } from 'lang/std/artifactGraph'
import { kclManager } from 'lib/singletons'

export function revolveSketch(
  ast: Node<Program>,
  pathToSketchNode: PathToNode,
  angle: Expr = createLiteral(4),
  axisOrEdge: string,
  axis: string,
  edge: Selections,
  artifactGraph: ArtifactGraph,
  artifact?: Artifact
):
  | {
      modifiedAst: Node<Program>
      pathToSketchNode: PathToNode
      pathToRevolveArg: PathToNode
    }
  | Error {
  const orderedSketchNodePaths = getPathsFromArtifact({
    artifact: artifact,
    sketchPathToNode: pathToSketchNode,
    artifactGraph,
    ast: kclManager.ast,
  })
  if (err(orderedSketchNodePaths)) return orderedSketchNodePaths
  const clonedAst = structuredClone(ast)
  const sketchNode = getNodeFromPath(clonedAst, pathToSketchNode)
  if (err(sketchNode)) return sketchNode

  let generatedAxis
  let axisDeclaration: PathToNode | null = null

  if (axisOrEdge === 'Edge') {
    const pathToAxisSelection = getNodePathFromSourceRange(
      clonedAst,
      edge.graphSelections[0]?.codeRef.range
    )
    const lineNode = getNodeFromPath<CallExpression | CallExpressionKw>(
      clonedAst,
      pathToAxisSelection,
      ['CallExpression', 'CallExpressionKw']
    )
    if (err(lineNode)) return lineNode

    const tagResult = mutateAstWithTagForSketchSegment(
      clonedAst,
      pathToAxisSelection
    )

    // Have the tag whether it is already created or a new one is generated
    if (err(tagResult)) return tagResult
    const { tag } = tagResult
    const axisSelection = edge?.graphSelections[0]?.artifact
    if (!axisSelection) return new Error('Generated axis selection is missing.')
    generatedAxis = getEdgeTagCall(tag, axisSelection)
    if (
      axisSelection.type === 'segment' ||
      axisSelection.type === 'path' ||
      axisSelection.type === 'edgeCut'
    ) {
      axisDeclaration = axisSelection.codeRef.pathToNode
    }
  } else {
    generatedAxis = createLiteral(axis)
  }

  const sketchVariableDeclaratorNode = getNodeFromPath<VariableDeclarator>(
    clonedAst,
    pathToSketchNode,
    'VariableDeclarator'
  )
  if (err(sketchVariableDeclaratorNode)) return sketchVariableDeclaratorNode
  const { node: sketchVariableDeclarator } = sketchVariableDeclaratorNode

  if (!generatedAxis) return new Error('Generated axis selection is missing.')

  const revolveCall = createCallExpressionStdLib('revolve', [
    createObjectExpression({
      angle: angle,
      axis: generatedAxis,
    }),
    createIdentifier(sketchVariableDeclarator.id.name),
  ])

  // We're not creating a pipe expression,
  // but rather a separate constant for the extrusion
  const name = findUniqueName(clonedAst, KCL_DEFAULT_CONSTANT_PREFIXES.REVOLVE)
  const VariableDeclaration = createVariableDeclaration(name, revolveCall)
  const lastSketchNodePath =
    orderedSketchNodePaths[orderedSketchNodePaths.length - 1]
  let sketchIndexInBody = Number(lastSketchNodePath[1][0])
  if (typeof sketchIndexInBody !== 'number') {
    return new Error('expected sketchIndexInBody to be a number')
  }

  // If an axis was selected in KCL, find the max index to insert the revolve command
  if (axisDeclaration) {
    const axisIndexInPathToNode =
      axisDeclaration.findIndex((a) => a[0] === 'body') + 1
    const axisIndex = axisDeclaration[axisIndexInPathToNode][0]

    if (typeof axisIndex !== 'number')
      return new Error('expected axisIndex to be a number')

    sketchIndexInBody = Math.max(sketchIndexInBody, axisIndex)
  }

  clonedAst.body.splice(sketchIndexInBody + 1, 0, VariableDeclaration)

  const pathToRevolveArg: PathToNode = [
    ['body', ''],
    [sketchIndexInBody + 1, 'index'],
    ['declaration', 'VariableDeclaration'],
    ['init', 'VariableDeclarator'],
    ['arguments', 'CallExpression'],
    [0, 'index'],
  ]

  return {
    modifiedAst: clonedAst,
    pathToSketchNode: [...pathToSketchNode.slice(0, -1), [-1, 'index']],
    pathToRevolveArg,
  }
}