namespace Commands

    module ConsoleCommands =

        open System
        open Console.Waterworks
        open Console.Waterworks.Attributes
        open SmoulderingBeachBall.Services
        open Validation
        open System.IO

        let showEndOfCommandMessage = "[INFO.] Execution completed."

        [<ListCommand>]
        [<Parameters "none">]
        [<Description
            "Display a text message indicating this program is running properly.">]
        [<Usage "test">]
        let test () = "[SUCCESS] Smouldering Beach Ball CLI seems to be working."

        [<ListCommand>]
        [<Parameters "none">]
        [<Description "Displays a list of available commands provided by this program.">]
        [<Usage "help">]
        let help () = CW_Liaison().RequestHelpDocumentation("Commands")

        [<ListCommand>]
        [<Parameters "none">]
        [<Description "Saves this program's cheat sheet to the desktop.">]
        [<Usage "cheat">]
        let cheat () =
            try
                printfn "[INFO] Attempting to save cheat sheet to the desktop..."
                let cheatSheetPath = __SOURCE_DIRECTORY__ + "/cheat-sheet.pdf"
                let savePath = getDesktopPath + "/smouldering-beach-ball-cheat-sheet.pdf"
                File.Copy (cheatSheetPath, savePath, true)
                showEndOfCommandMessage
            with
            | :? FileNotFoundException as ex -> ex.Message
            | _ as ex -> ex.Message

        [<ListCommand>]
        [<Parameters "none">]
        [<Description "Exits out of the program.">]
        [<Usage "exit">]
        let exit () = Environment.Exit (Environment.ExitCode)

        [<ListCommand>]
        [<Parameters "(image-width: int) (image-height: int)" >]
        [<Description
            ("Saves an image to the desktop, using the default setting.\n" +
            "The user must specify the width and the height of the image.")>]
        [<Usage "draw-default 500 500">]
        let ``draw-default`` imgWidth imgHeight =
            try
                buildDefaultSpec imgWidth imgHeight
                |> makeImage
                |> Async.RunSynchronously
                showEndOfCommandMessage
            with
            | :? ArgumentException as ex -> ex.Message
            | _ as ex -> ex.Message

        [<ListCommand>]
        [<Parameters
            ("(image-width: int) (image-height: int) (main-colour: string) " +
            "(overlay-colour: string) (overlay-type: string) (file-path: string)")>]
        [<Description
            ("\nCreates an image using the values specified by the user.\n" +
            "To see a list of available colours use the 'list-colours' command.\n" +
            "For the overlay-type you can enter either 'none', 'border' or 'full.'\n" +
            "For the file path, you can enter 'desktop' to save to the desktop.\n" +
            "Otherwise, you must specify the whole path.")>]
        [<Usage
            ("\ndraw-image 770 400 white black full desktop\n" +
            "draw-image 600 400 purple grey border C:/work/project-folder/images\n" +
            "draw-image 800 440 black - none D:/your-project/assets")>]
        let ``draw-image`` imgWidth imgHeight mainColour oColour oType path =
            try
                buildSpec imgWidth imgHeight mainColour oColour oType path
                |> makeImage
                |> Async.RunSynchronously
                showEndOfCommandMessage
            with
            | :? ArgumentException as ex -> ex.Message
            | _ as ex -> ex.Message

        [<ListCommand>]
        [<Parameters "None">]
        [<Description "Lists out the colours this program uses to draw its images.">]
        [<Usage "list-colours">]
        let ``list-colours`` () =
            printfn "[INFO.] Listing available colours..."
            for item in colourList do
                printfn "%s" item.Key
            showEndOfCommandMessage

        (* ALIASES 
        =======================================================================
        These command-methods will not show up in the help section. 
        Before adding extra aliases, make sure the main version is as clear and
        helpful to someone new to the program as possible. Aliases should be
        treated as commands for experienced users and documented on the wiki,
        hosted alongside the repository on GitHub.
        URL: https://github.com/CraigOates/Smouldering-Beach-Ball/wiki *)

        let dd imgWidth imgHeight =
            ``draw-default`` imgWidth imgHeight

        let di imgWidth imgHeight mainColour oColour oType path =
            ``draw-image`` imgWidth imgHeight mainColour oColour oType path

        let lc () = ``list-colours`` ()