# Command Handlers for the debugger.

# Not in the debugger package, as I always want these interfaces to be
# available, even if the debugger has not yet been (or can not be)
# imported
import warnings

import win32ui
from pywin.scintilla.control import CScintillaEditInterface

from . import scriptutils

IdToBarNames = {
    win32ui.IDC_DBG_STACK: ("Stack", 0),
    win32ui.IDC_DBG_BREAKPOINTS: ("Breakpoints", 0),
    win32ui.IDC_DBG_WATCH: ("Watch", 1),
}


class DebuggerCommandHandler:
    def HookCommands(self):
        commands = (
            (self.OnStep, None, win32ui.IDC_DBG_STEP),
            (self.OnStepOut, self.OnUpdateOnlyBreak, win32ui.IDC_DBG_STEPOUT),
            (self.OnStepOver, None, win32ui.IDC_DBG_STEPOVER),
            (self.OnGo, None, win32ui.IDC_DBG_GO),
            (self.OnClose, self.OnUpdateClose, win32ui.IDC_DBG_CLOSE),
            (self.OnAdd, self.OnUpdateAddBreakpoints, win32ui.IDC_DBG_ADD),
            (self.OnClearAll, self.OnUpdateClearAllBreakpoints, win32ui.IDC_DBG_CLEAR),
            # 		                  (self.OnDebuggerToolbar, self.OnUpdateDebuggerToolbar, win32ui.ID_DEBUGGER_TOOLBAR),
        )

        frame = win32ui.GetMainFrame()

        for methHandler, methUpdate, id in commands:
            frame.HookCommand(methHandler, id)
            if not methUpdate is None:
                frame.HookCommandUpdate(methUpdate, id)

        for id in IdToBarNames:
            frame.HookCommand(self.OnDebuggerBar, id)
            frame.HookCommandUpdate(self.OnUpdateDebuggerBar, id)

    def OnDebuggerToolbar(self, id, code):
        if code == 0:
            return not win32ui.GetMainFrame().OnBarCheck(id)

    def OnUpdateDebuggerToolbar(self, cmdui):
        win32ui.GetMainFrame().OnUpdateControlBarMenu(cmdui)
        cmdui.Enable(1)

    def _GetDebugger(self):
        try:
            import pywin.debugger

            return pywin.debugger.currentDebugger
        except ImportError:
            return None

    def _DoOrStart(self, doMethod, startFlag):
        d = self._GetDebugger()
        if d is not None and d.IsDebugging():
            method = getattr(d, doMethod)
            method()
        else:
            scriptutils.RunScript(
                defName=None, defArgs=None, bShowDialog=0, debuggingType=startFlag
            )

    def OnStep(self, msg, code):
        self._DoOrStart("do_set_step", scriptutils.RS_DEBUGGER_STEP)

    def OnStepOver(self, msg, code):
        self._DoOrStart("do_set_next", scriptutils.RS_DEBUGGER_STEP)

    def OnStepOut(self, msg, code):
        d = self._GetDebugger()
        if d is not None and d.IsDebugging():
            d.do_set_return()

    def OnGo(self, msg, code):
        self._DoOrStart("do_set_continue", scriptutils.RS_DEBUGGER_GO)

    def OnClose(self, msg, code):
        d = self._GetDebugger()
        if d is not None:
            if d.IsDebugging():
                d.set_quit()
            else:
                d.close()

    def OnUpdateClose(self, cmdui):
        d = self._GetDebugger()
        if d is not None and d.inited:
            cmdui.Enable(1)
        else:
            cmdui.Enable(0)

    def OnAdd(self, msg, code):
        doc, view = scriptutils.GetActiveEditorDocument()
        if doc is None:
            ## Don't do a messagebox, as this could be triggered from the app's
            ## idle loop whenever the debug toolbar is visible, giving a never-ending
            ## series of dialogs.  This can happen when the OnUpdate handler
            ## for the toolbar button IDC_DBG_ADD fails, since MFC falls back to
            ## sending a normal command if the UI update command fails.
            ## win32ui.MessageBox('There is no active window - no breakpoint can be added')
            warnings.warn("There is no active window - no breakpoint can be added")
            return None
        pathName = doc.GetPathName()
        lineNo = view.LineFromChar(view.GetSel()[0]) + 1
        # If I have a debugger, then tell it, otherwise just add a marker
        d = self._GetDebugger()
        if d is None:
            import pywin.framework.editor.color.coloreditor

            doc.MarkerToggle(
                lineNo, pywin.framework.editor.color.coloreditor.MARKER_BREAKPOINT
            )
        else:
            if d.get_break(pathName, lineNo):
                win32ui.SetStatusText("Clearing breakpoint", 1)
                rc = d.clear_break(pathName, lineNo)
            else:
                win32ui.SetStatusText("Setting breakpoint", 1)
                rc = d.set_break(pathName, lineNo)
            if rc:
                win32ui.MessageBox(rc)
            d.GUIRespondDebuggerData()

    def OnClearAll(self, msg, code):
        win32ui.SetStatusText("Clearing all breakpoints")
        d = self._GetDebugger()
        if d is None:
            import pywin.framework.editor
            import pywin.framework.editor.color.coloreditor

            for doc in pywin.framework.editor.editorTemplate.GetDocumentList():
                doc.MarkerDeleteAll(
                    pywin.framework.editor.color.coloreditor.MARKER_BREAKPOINT
                )
        else:
            d.clear_all_breaks()
            d.UpdateAllLineStates()
            d.GUIRespondDebuggerData()

    def OnUpdateOnlyBreak(self, cmdui):
        d = self._GetDebugger()
        ok = d is not None and d.IsBreak()
        cmdui.Enable(ok)

    def OnUpdateAddBreakpoints(self, cmdui):
        doc, view = scriptutils.GetActiveEditorDocument()
        if doc is None or not isinstance(view, CScintillaEditInterface):
            enabled = 0
        else:
            enabled = 1
            lineNo = view.LineFromChar(view.GetSel()[0]) + 1
            import pywin.framework.editor.color.coloreditor

            cmdui.SetCheck(
                doc.MarkerAtLine(
                    lineNo, pywin.framework.editor.color.coloreditor.MARKER_BREAKPOINT
                )
                != 0
            )
        cmdui.Enable(enabled)

    def OnUpdateClearAllBreakpoints(self, cmdui):
        d = self._GetDebugger()
        cmdui.Enable(d is None or len(d.breaks) != 0)

    def OnUpdateDebuggerBar(self, cmdui):
        name, enabled = IdToBarNames.get(cmdui.m_nID, (None, 0))
        d = self._GetDebugger()
        if d is not None and d.IsDebugging() and name is not None:
            enabled = 1
            bar = d.GetDebuggerBar(name)
            cmdui.SetCheck(bar.IsWindowVisible())
        cmdui.Enable(enabled)

    def OnDebuggerBar(self, id, code):
        name = IdToBarNames.get(id)[0]
        d = self._GetDebugger()
        if d is not None and name is not None:
            bar = d.GetDebuggerBar(name)
            newState = not bar.IsWindowVisible()
            win32ui.GetMainFrame().ShowControlBar(bar, newState, 1)
