namespace LibraryTests

    module TestingHelpers =

        open System
        open System.Drawing
        open System.Reflection
        open SmoulderingBeachBall.Domain
        open SmoulderingBeachBall.Services

        let loadLocation = __SOURCE_DIRECTORY__ + "/LoadingTestArea"

        let allColours =
            let properties =
                typeof<Brushes>.GetProperties(BindingFlags.Public ||| BindingFlags.Static)
            seq { for prop in properties -> prop}
            |> Seq.toArray

        let randomBrush () =
            let item = allColours.[Random().Next(allColours.Length)]
            item.GetValue(null, null)

        let populateSpec () =
            { width = (Random().Next(3000))
              height = (Random().Next(3000))
              colour = (randomBrush ()) :?> Brush
              filePath = loadLocation
              overlay = None }

        let generateSpecs amount =
            [for i in 1 .. amount -> (populateSpec ()) ]
        
        let populateLoadingTestArea () =
            printfn "[INFO.] Populating LoadingTestArea..."
            generateSpecs 100
            |> List.map makeImage
            |> Async.Parallel
            |> Async.RunSynchronously
            |> ignore
            printfn "[INFO.] Finishing populating Saving Test Area."

    module PropertyTests =

        open FsCheck.Xunit
        open DeathSocket
        open System.Drawing
        open DeathSocket.GridPainter
        open TestingHelpers

        [<Property>]
        let ``Can apply grid to image and save it`` () =
            let spec =
                { originalPath = "tba"
                  savePath = "tba"
                  colour = randomBrush () :?> Brush
                  penWidth = float32 0.002
                  rows = 10
                  columns = 10 }
            applyGrid spec |> Async.RunSynchronously

        [<Property>]
        let ``Can populate the LoadingTestArea`` () =
            populateLoadingTestArea ()
            true = true

    module UnitTests =

        open System.IO
        open TestingHelpers
        open Xunit

        // This test is just a check to make sure the property tests have what they need to run.
        [<Fact>]
        let ``LoadingTestArea contains at least 100 test images`` () =
            let files = Directory.GetFileSystemEntries (loadLocation, "*.png")
            let length = files.Length
            let result = if length < 100 then false else true
            Assert.True result