Project = require 'project'
Buffer = require 'buffer'
EditSession = require 'edit-session'

describe "LanguageMode", ->
  [editSession, buffer, languageMode] = []

  afterEach ->
    editSession.destroy()

  describe "common behavior", ->
    beforeEach ->
      editSession = fixturesProject.buildEditSessionForPath('sample.js', autoIndent: false)
      { buffer, languageMode } = editSession

    describe "language detection", ->
      it "uses the file name as the file type if it has no extension", ->
        jsEditSession = fixturesProject.buildEditSessionForPath('js', autoIndent: false)
        expect(jsEditSession.languageMode.grammar.name).toBe "JavaScript"
        jsEditSession.destroy()

    describe "matching character insertion", ->
      beforeEach ->
        editSession.buffer.setText("")

      describe "when there is non-whitespace after the cursor", ->
        it "does not insert a matching bracket", ->
          editSession.buffer.setText("ab")
          editSession.setCursorBufferPosition([0, 1])
          editSession.insertText("(")

          expect(editSession.buffer.getText()).toBe "a(b"

      describe "when there are multiple cursors", ->
        it "inserts ) at each cursor", ->
          editSession.buffer.setText("()\nab\n[]\n12")
          editSession.setCursorBufferPosition([3, 1])
          editSession.addCursorAtBufferPosition([2, 1])
          editSession.addCursorAtBufferPosition([1, 1])
          editSession.addCursorAtBufferPosition([0, 1])
          editSession.insertText ')'

          expect(editSession.buffer.getText()).toBe "())\na)b\n[)]\n1)2"

      describe "when ( is inserted", ->
        it "inserts a matching ) following the cursor", ->
          editSession.insertText '('
          expect(buffer.lineForRow(0)).toMatch /^\(\)/

      describe "when [ is inserted", ->
        it "inserts a matching ] following the cursor", ->
          editSession.insertText '['
          expect(buffer.lineForRow(0)).toMatch /^\[\]/

      describe "when { is inserted", ->
        it "inserts a matching ) following the cursor", ->
          editSession.insertText '{'
          expect(buffer.lineForRow(0)).toMatch /^\{\}/

      describe "when \" is inserted", ->
        it "inserts a matching \" following the cursor", ->
          editSession.insertText '"'
          expect(buffer.lineForRow(0)).toMatch /^""/

      describe "when ' is inserted", ->
        it "inserts a matching ' following the cursor", ->
          editSession.insertText "'"
          expect(buffer.lineForRow(0)).toMatch /^''/

      describe "when ) is inserted before a )", ->
        it "moves the cursor one column to the right instead of inserting a new )", ->
          editSession.insertText '() '
          editSession.setCursorBufferPosition([0, 1])
          editSession.insertText ')'
          expect(buffer.lineForRow(0)).toBe "() "
          expect(editSession.getCursorBufferPosition().column).toBe 2

  describe "javascript", ->
    beforeEach ->
      editSession = fixturesProject.buildEditSessionForPath('sample.js', autoIndent: false)
      { buffer, languageMode } = editSession

    describe ".toggleLineCommentsInRange(range)", ->
      it "comments/uncomments lines in the given range", ->
        languageMode.toggleLineCommentsInRange([[4, 5], [7, 8]])
        expect(buffer.lineForRow(4)).toBe "//     while(items.length > 0) {"
        expect(buffer.lineForRow(5)).toBe "//       current = items.shift();"
        expect(buffer.lineForRow(6)).toBe "//       current < pivot ? left.push(current) : right.push(current);"
        expect(buffer.lineForRow(7)).toBe "//     }"

        languageMode.toggleLineCommentsInRange([[4, 5], [5, 8]])
        expect(buffer.lineForRow(4)).toBe "    while(items.length > 0) {"
        expect(buffer.lineForRow(5)).toBe "      current = items.shift();"
        expect(buffer.lineForRow(6)).toBe "//       current < pivot ? left.push(current) : right.push(current);"
        expect(buffer.lineForRow(7)).toBe "//     }"

    describe "fold suggestion", ->
      describe ".doesBufferRowStartFold(bufferRow)", ->
        it "returns true only when the buffer row starts a foldable region", ->
          expect(languageMode.doesBufferRowStartFold(0)).toBeTruthy()
          expect(languageMode.doesBufferRowStartFold(1)).toBeTruthy()
          expect(languageMode.doesBufferRowStartFold(2)).toBeFalsy()
          expect(languageMode.doesBufferRowStartFold(3)).toBeFalsy()

      describe ".rowRangeForFoldAtBufferRow(bufferRow)", ->
        it "returns the start/end rows of the foldable region starting at the given row", ->
          expect(languageMode.rowRangeForFoldAtBufferRow(0)).toEqual [0, 12]
          expect(languageMode.rowRangeForFoldAtBufferRow(1)).toEqual [1, 9]
          expect(languageMode.rowRangeForFoldAtBufferRow(2)).toBeNull()
          expect(languageMode.rowRangeForFoldAtBufferRow(4)).toEqual [4, 7]

  describe "coffeescript", ->
    beforeEach ->
      editSession = fixturesProject.buildEditSessionForPath('coffee.coffee', autoIndent: false)
      { buffer, languageMode } = editSession

    describe ".toggleLineCommentsInRange(range)", ->
      it "comments/uncomments lines in the given range", ->
        languageMode.toggleLineCommentsInRange([[4, 5], [7, 8]])
        expect(buffer.lineForRow(4)).toBe "#     pivot = items.shift()"
        expect(buffer.lineForRow(5)).toBe "#     left = []"
        expect(buffer.lineForRow(6)).toBe "#     right = []"
        expect(buffer.lineForRow(7)).toBe "# "

        languageMode.toggleLineCommentsInRange([[4, 5], [5, 8]])
        expect(buffer.lineForRow(4)).toBe "    pivot = items.shift()"
        expect(buffer.lineForRow(5)).toBe "    left = []"
        expect(buffer.lineForRow(6)).toBe "#     right = []"
        expect(buffer.lineForRow(7)).toBe "# "

    describe "fold suggestion", ->
      describe ".doesBufferRowStartFold(bufferRow)", ->
        it "returns true only when the buffer row starts a foldable region", ->
          expect(languageMode.doesBufferRowStartFold(0)).toBeTruthy()
          expect(languageMode.doesBufferRowStartFold(1)).toBeTruthy()
          expect(languageMode.doesBufferRowStartFold(2)).toBeFalsy()
          expect(languageMode.doesBufferRowStartFold(3)).toBeFalsy()
          expect(languageMode.doesBufferRowStartFold(19)).toBeTruthy()

      describe ".rowRangeForFoldAtBufferRow(bufferRow)", ->
        it "returns the start/end rows of the foldable region starting at the given row", ->
          expect(languageMode.rowRangeForFoldAtBufferRow(0)).toEqual [0, 20]
          expect(languageMode.rowRangeForFoldAtBufferRow(1)).toEqual [1, 17]
          expect(languageMode.rowRangeForFoldAtBufferRow(2)).toBeNull()
          expect(languageMode.rowRangeForFoldAtBufferRow(19)).toEqual [19, 20]