module Commands.TestInsertText exposing (testInsertText)

import Array
import Expect
import RichText.Commands
import RichText.Definitions
import RichText.Model.Element
import RichText.Model.Node
import RichText.Model.Selection
import RichText.Model.State
import Test exposing (Test)


example : RichText.Model.State.State
example =
    RichText.Model.State.state
        (RichText.Model.Node.block
            (RichText.Model.Element.element RichText.Definitions.doc [])
            (RichText.Model.Node.blockChildren <|
                Array.fromList
                    [ RichText.Model.Node.block
                        (RichText.Model.Element.element RichText.Definitions.paragraph [])
                        (RichText.Model.Node.inlineChildren <|
                            Array.fromList
                                [ RichText.Model.Node.plainText "text"
                                ]
                        )
                    ]
            )
        )
        (Just <| RichText.Model.Selection.caret [ 0, 0 ] 2)


expectedExample : RichText.Model.State.State
expectedExample =
    RichText.Model.State.state
        (RichText.Model.Node.block
            (RichText.Model.Element.element RichText.Definitions.doc [])
            (RichText.Model.Node.blockChildren <|
                Array.fromList
                    [ RichText.Model.Node.block
                        (RichText.Model.Element.element RichText.Definitions.paragraph [])
                        (RichText.Model.Node.inlineChildren <|
                            Array.fromList
                                [ RichText.Model.Node.plainText "teinsertxt" ]
                        )
                    ]
            )
        )
        (Just <| RichText.Model.Selection.caret [ 0, 0 ] 8)


expectedRange : RichText.Model.State.State
expectedRange =
    RichText.Model.State.state
        (RichText.Model.Node.block
            (RichText.Model.Element.element RichText.Definitions.doc [])
            (RichText.Model.Node.blockChildren <|
                Array.fromList
                    [ RichText.Model.Node.block
                        (RichText.Model.Element.element RichText.Definitions.paragraph [])
                        (RichText.Model.Node.inlineChildren <|
                            Array.fromList
                                [ RichText.Model.Node.plainText "insertxt" ]
                        )
                    ]
            )
        )
        (Just <| RichText.Model.Selection.caret [ 0, 0 ] 6)


blockSelected : RichText.Model.State.State
blockSelected =
    RichText.Model.State.state
        (RichText.Model.Node.block
            (RichText.Model.Element.element RichText.Definitions.doc [])
            (RichText.Model.Node.blockChildren <|
                Array.fromList
                    [ RichText.Model.Node.block
                        (RichText.Model.Element.element RichText.Definitions.paragraph [])
                        (RichText.Model.Node.inlineChildren <|
                            Array.fromList
                                [ RichText.Model.Node.plainText "insertxt" ]
                        )
                    , RichText.Model.Node.block
                        (RichText.Model.Element.element RichText.Definitions.horizontalRule [])
                        RichText.Model.Node.Leaf
                    ]
            )
        )
        (Just <| RichText.Model.Selection.caret [ 1 ] 0)


inlineSelected : RichText.Model.State.State
inlineSelected =
    RichText.Model.State.state
        (RichText.Model.Node.block
            (RichText.Model.Element.element RichText.Definitions.doc [])
            (RichText.Model.Node.blockChildren <|
                Array.fromList
                    [ RichText.Model.Node.block
                        (RichText.Model.Element.element RichText.Definitions.paragraph [])
                        (RichText.Model.Node.inlineChildren <|
                            Array.fromList
                                [ RichText.Model.Node.inlineElement (RichText.Model.Element.element RichText.Definitions.image []) [] ]
                        )
                    ]
            )
        )
        (Just <| RichText.Model.Selection.caret [ 0, 0 ] 0)


testInsertText : Test
testInsertText =
    Test.describe "Tests the insertText transform"
        [ Test.test "Tests that the example case works as expected" <|
            \_ -> Expect.equal (Ok expectedExample) (RichText.Commands.insertText "insert" example)
        , Test.test "it should insert into a range" <|
            \_ ->
                Expect.equal
                    (Ok expectedRange)
                    (RichText.Commands.insertText "insert"
                        (example
                            |> RichText.Model.State.withSelection (Just <| RichText.Model.Selection.singleNodeRange [ 0, 0 ] 0 2)
                        )
                    )
        , Test.test "it should fail if a block leaf is selected" <|
            \_ ->
                Expect.equal
                    (Err "I was expecting a text leaf, but instead I found a block node")
                    (RichText.Commands.insertText "insert" blockSelected)
        , Test.test "it should fail if an inline leaf is selected" <|
            \_ ->
                Expect.equal
                    (Err "I was expecting a text leaf, but instead found an inline element")
                    (RichText.Commands.insertText "insert" inlineSelected)
        ]