module Main where

-- {{{ Imports
import Hbro.Config
import Hbro.Core
import Hbro.Extra.Bookmarks
import Hbro.Extra.Clipboard
import Hbro.Extra.History
import Hbro.Extra.Misc
import Hbro.Extra.Prompt
import Hbro.Extra.StatusBar
import Hbro.Gui
import Hbro.Types
import Hbro.Util

import Graphics.UI.Gtk.Abstract.Widget
import Graphics.UI.Gtk.Entry.Entry
import Graphics.UI.Gtk.Gdk.EventM
import Graphics.UI.Gtk.Gdk.GC
import Graphics.UI.Gtk.WebKit.Download
import Graphics.UI.Gtk.WebKit.NetworkRequest
import Graphics.UI.Gtk.WebKit.WebNavigationAction
import Graphics.UI.Gtk.WebKit.WebSettings
import Graphics.UI.Gtk.WebKit.WebView
import Graphics.UI.Gtk.Windows.Window

import System.Environment
import System.Glib.Attributes
import System.Glib.Signals
-- import System.Posix.Process
import System.Process 
-- }}}


main :: IO ()
main = do
    configHome <- getEnv "XDG_CONFIG_HOME"

    -- See Types::Configuration documentation for fields description
    -- Commented out fields indicated default values
    hbro defaultConfiguration {
        --mSocketDir    = "/tmp/",
        mUIFile         = configHome ++ "/hbro/ui.xml",
        --mHomePage     = "https://www.google.com",
        mKeys           = myKeys,
        mWebSettings    = myWebSettings,
        mSetup          = mySetup
    }


-- {{{ Keys
myKeys :: KeysList
myKeys = generalKeys ++ bookmarksKeys ++ historyKeys

generalKeys :: KeysList
generalKeys = [
    --  ((modifiers,        key),           callback)
    -- Browse
    (([],               "<"),           goBack),
    (([Shift],          ">"),           goForward),
    (([Control],        "s"),           stopLoading),
    (([],               "<F5>"),        reload True),
    (([Shift],          "<F5>"),        reload False),
    (([Control],        "r"),           reload True),
    (([Control, Shift], "R"),           reload False),
    (([Control],        "^"),           horizontalHome),
    (([Control],        "$"),           horizontalEnd),
    (([Control],        "<Home>"),      verticalHome),
    (([Control],        "<End>"),       verticalEnd),
    (([Alt],            "<Home>"),      goHome),
    (([Control],        "g"),           promptGoogle),

    -- Display
    (([Control, Shift], "+"),           zoomIn),
    (([Control],        "-"),           zoomOut),
    (([],               "<F11>"),       fullscreen),
    (([],               "<Escape>"),    unfullscreen),
    (([Control],        "b"),           toggleStatusBar),
    (([Control],        "u"),           toggleSourceMode),

    -- Prompt
    (([Control],        "o"),           promptURL False), 
    (([Control, Shift], "O"),           promptURL True),

    -- Search
    (([Shift],          "/"),           promptFind False True True),
    (([Control],        "f"),           promptFind False True True),
    (([Shift],          "?"),           promptFind False False True),
    (([Control],        "n"),           findNext False True True),
    (([Control, Shift], "N"),           findNext False False True),

    -- Copy/paste
    (([Control],        "y"),           copyUri),
    (([Control, Shift], "Y"),           copyTitle),
    (([Control],        "p"),           loadURIFromClipboard),

    -- Others
    (([Control],        "i"),           showWebInspector),
    (([Alt],            "p"),           printPage),
    (([Control],        "t"),           newWindow)
    ]

bookmarksKeys :: KeysList
bookmarksKeys = [
--  ((modifiers,        key),           callback)
    (([Control],        "d"),           addToBookmarks),
    (([Control, Shift], "D"),           addAllInstancesToBookmarks),
    (([Alt],            "d"),           deleteTagFromBookmarks),
    (([Control],        "l"),           loadFromBookmarks),
    (([Control, Shift], "L"),           loadTagFromBookmarks)
    ]

historyKeys :: KeysList
historyKeys = [
    (([Control],        "h"),           loadFromHistory)
    ]
-- }}}


-- {{{ Web settings
-- Commented lines correspond to default values
myWebSettings :: IO WebSettings
myWebSettings = do
    settings <- webSettingsNew
    set settings [
        --SETTING                                      DEFAULT VALUE 
        --webSettingsCursiveFontFamily              := "serif",
        --webSettingsDefaultFontFamily              := "sans-serif",
        --webSettingsFantasyFontFamily              := ,
        --webSettingsMonospaceFontFamily            := "monospace",
        --webSettingsSansFontFamily                 := "sans-serif",
        --webSettingsSerifFontFamily                := "serif",
        --webSettingsDefaultFontSize                := ,
        --webSettingsDefaultMonospaceFontSize       := 10,
        --webSettingsMinimumFontSize                := 5,
        --webSettingsMinimumLogicalFontSize         := 5,
        --webSettingsAutoLoadImages                 := True,
        --webSettingsAutoShrinkImages               := True,
        --webSettingsDefaultEncoding                := "iso-8859-1",
        --webSettingsEditingBehavior                := EditingBehaviorWindows,
        --webSettingsEnableCaretBrowsing              := False,
        webSettingsEnableDeveloperExtras            := True,
        --webSettingsEnableHtml5Database              := True,
        --webSettingsEnableHtml5LocalStorage          := True,
        --webSettingsEnableOfflineWebApplicationCache := True,
        webSettingsEnablePlugins                    := True,
        webSettingsEnablePrivateBrowsing            := False, -- Experimental
        webSettingsEnableScripts                    := True,
        --webSettingsEnableSpellChecking              := False,
        webSettingsEnableUniversalAccessFromFileUris := True,
        webSettingsEnableXssAuditor                 := True,
        --webSettingsEnableSiteSpecificQuirks       := False,
        --webSettingsEnableDomPaste                 := False,
        --webSettingsEnableDefaultContextMenu       := True,
        webSettingsEnablePageCache                  := True,
        --webSettingsEnableSpatialNavigation        := False,
        --webSettingsEnforce96Dpi                   := ,
        webSettingsJSCanOpenWindowAuto              := True,
        --webSettingsPrintBackgrounds               := True,
        --webSettingsResizableTextAreas             := True,
        webSettingsSpellCheckingLang                := Just "en_US",
        --webSettingsTabKeyCyclesThroughElements    := True,
        webSettingsUserAgent                        := "Mozilla Firefox"
        --webSettingsUserStylesheetUri              := Nothing,
        --webSettingsZoomStep                       := 0.1
        ]
    return settings
-- }}}


-- {{{ Setup
mySetup :: Browser -> IO ()
mySetup browser = 
    let
        builder         = mBuilder      (mGUI browser)
        webView         = mWebView      (mGUI browser)
        scrollWindow    = mScrollWindow (mGUI browser)
        window          = mWindow       (mGUI browser)
    in do
        -- Default background (for status bar)
        widgetModifyBg window StateNormal (Color 0 0 10000)
        
        -- Status bar
        statusBarScrollPosition browser
        statusBarPressedKeys    browser
        statusBarLoadProgress   browser
        statusBarURI            browser

        _ <- on webView titleChanged $ \_ title ->
            set window [ windowTitle := ("hbro | " ++ title)]


        -- Special requests
        _ <- on webView downloadRequested $ \download -> do
            getUri <- downloadGetUri download
            _ <- case getUri of
                Just uri -> downloadHandler uri 
                _        -> return ()
            return True

        _ <- on webView mimeTypePolicyDecisionRequested $ \_ request mimetype policyDecision -> do
            getUri <- networkRequestGetUri request
            case (getUri, mimetype) of
                --(Just uri, 'a':'p':'p':'l':'i':'c':'a':'t':'i':'o':'n':'/':_) -> downloadHandler uri
                (Just uri, _) -> putStrLn $ mimetype ++ ": " ++ uri
                _             -> putStrLn "FIXME"

            return False


        -- History handler
        _ <- on webView loadFinished $ \_ -> do
            getUri   <- webViewGetUri   webView
            getTitle <- webViewGetTitle webView
            case (getUri, getTitle) of
                (Just uri, Just title)  -> addToHistory uri title
                _                       -> return ()


        -- On navigating to a new URI
        -- Return True to forbid navigation, False to allow
        _ <- on webView navigationPolicyDecisionRequested $ \_ request action policyDecision -> do
            getUri      <- networkRequestGetUri request
            reason      <- webNavigationActionGetReason action
            mouseButton <- webNavigationActionGetButton action

            case getUri of
                Just ('m':'a':'i':'l':'t':'o':':':address) -> do
                    putStrLn $ "Mailing to: " ++ address
                    return True
                Just uri -> 
                    case mouseButton of
                        1 -> return False -- Left button 
                        2 -> runExternalCommand ("hbro -u \"" ++ uri ++ "\"") >> return True -- Middle button
                        3 -> return False -- Right button
                        _ -> return False -- No mouse button pressed
                _        -> return False

            
        -- On requesting new window
        _ <- on webView newWindowPolicyDecisionRequested $ \_ request action policyDecision -> do
            getUri <- networkRequestGetUri request
            case getUri of
                Just uri -> runExternalCommand $ "hbro -u \"" ++ uri ++ "\""
                _        -> putStrLn "ERROR: wrong URI given, unable to open window."

            return True

        -- Favicon
        --_ <- on webView iconLoaded $ \uri -> do something

        return ()
-- }}}

    
downloadHandler :: String -> IO ()
downloadHandler uri = runExternalCommand $ "wget \"" ++ uri ++ "\""

promptGoogle :: Browser -> IO ()
promptGoogle browser = 
    prompt "Google search" "" False browser (\browser' -> do
        keyWords <- entryGetText (mPromptEntry $ mGUI browser')
        loadURL ("https://www.google.com/search?q=" ++ keyWords) browser'
        return ())