//===-- ScriptInterpreter.h -------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef liblldb_ScriptInterpreter_h_
#define liblldb_ScriptInterpreter_h_

// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/lldb-private.h"

#include "lldb/Core/Broadcaster.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/PluginInterface.h"
#include "lldb/Core/StructuredData.h"

#include "lldb/Utility/PseudoTerminal.h"

namespace lldb_private {
    
class ScriptInterpreterLocker
{
public:
    
    ScriptInterpreterLocker() = default;
    
    virtual ~ScriptInterpreterLocker() = default;

private:
    DISALLOW_COPY_AND_ASSIGN (ScriptInterpreterLocker);
};

class ScriptInterpreter : public PluginInterface
{
public:
    typedef enum
    {
        eScriptReturnTypeCharPtr,
        eScriptReturnTypeBool,
        eScriptReturnTypeShortInt,
        eScriptReturnTypeShortIntUnsigned,
        eScriptReturnTypeInt,
        eScriptReturnTypeIntUnsigned,
        eScriptReturnTypeLongInt,
        eScriptReturnTypeLongIntUnsigned,
        eScriptReturnTypeLongLong,
        eScriptReturnTypeLongLongUnsigned,
        eScriptReturnTypeFloat,
        eScriptReturnTypeDouble,
        eScriptReturnTypeChar,
        eScriptReturnTypeCharStrOrNone,
        eScriptReturnTypeOpaqueObject
    } ScriptReturnType;
    
    ScriptInterpreter (CommandInterpreter &interpreter, lldb::ScriptLanguage script_lang);

    ~ScriptInterpreter() override;

    struct ExecuteScriptOptions
    {
    public:
        ExecuteScriptOptions () :
            m_enable_io(true),
            m_set_lldb_globals(true),
            m_maskout_errors(true)
        {
        }
        
        bool
        GetEnableIO () const
        {
            return m_enable_io;
        }
        
        bool
        GetSetLLDBGlobals () const
        {
            return m_set_lldb_globals;
        }
        
        bool
        GetMaskoutErrors () const
        {
            return m_maskout_errors;
        }
        
        ExecuteScriptOptions&
        SetEnableIO (bool enable)
        {
            m_enable_io = enable;
            return *this;
        }

        ExecuteScriptOptions&
        SetSetLLDBGlobals (bool set)
        {
            m_set_lldb_globals = set;
            return *this;
        }

        ExecuteScriptOptions&
        SetMaskoutErrors (bool maskout)
        {
            m_maskout_errors = maskout;
            return *this;
        }
        
    private:
        bool m_enable_io;
        bool m_set_lldb_globals;
        bool m_maskout_errors;
    };

    virtual bool
    Interrupt()
    {
        return false;
    }

    virtual bool
    ExecuteOneLine (const char *command,
                    CommandReturnObject *result,
                    const ExecuteScriptOptions &options = ExecuteScriptOptions()) = 0;

    virtual void
    ExecuteInterpreterLoop () = 0;

    virtual bool
    ExecuteOneLineWithReturn (const char *in_string,
                              ScriptReturnType return_type,
                              void *ret_value,
                              const ExecuteScriptOptions &options = ExecuteScriptOptions())
    {
        return true;
    }

    virtual Error
    ExecuteMultipleLines (const char *in_string,
                          const ExecuteScriptOptions &options = ExecuteScriptOptions())
    {
        Error error;
        error.SetErrorString("not implemented");
        return error;
    }

    virtual Error
    ExportFunctionDefinitionToInterpreter (StringList &function_def)
    {
        Error error;
        error.SetErrorString("not implemented");
        return error;
    }

    virtual Error
    GenerateBreakpointCommandCallbackData (StringList &input, std::string& output)
    {
        Error error;
        error.SetErrorString("not implemented");
        return error;
    }
    
    virtual bool
    GenerateWatchpointCommandCallbackData (StringList &input, std::string& output)
    {
        return false;
    }
    
    virtual bool
    GenerateTypeScriptFunction(const char* oneliner, std::string& output, const void* name_token = nullptr)
    {
        return false;
    }
    
    virtual bool
    GenerateTypeScriptFunction(StringList &input, std::string& output, const void* name_token = nullptr)
    {
        return false;
    }
    
    virtual bool
    GenerateScriptAliasFunction (StringList &input, std::string& output)
    {
        return false;
    }
    
    virtual bool
    GenerateTypeSynthClass(StringList &input, std::string& output, const void* name_token = nullptr)
    {
        return false;
    }
    
    virtual bool
    GenerateTypeSynthClass(const char* oneliner, std::string& output, const void* name_token = nullptr)
    {
        return false;
    }

    virtual StructuredData::ObjectSP
    CreateSyntheticScriptedProvider(const char *class_name, lldb::ValueObjectSP valobj)
    {
        return StructuredData::ObjectSP();
    }

    virtual StructuredData::GenericSP
    CreateScriptCommandObject (const char *class_name)
    {
        return StructuredData::GenericSP();
    }

    virtual StructuredData::GenericSP
    OSPlugin_CreatePluginObject (const char *class_name,
                                 lldb::ProcessSP process_sp)
    {
        return StructuredData::GenericSP();
    }

    virtual StructuredData::DictionarySP
    OSPlugin_RegisterInfo(StructuredData::ObjectSP os_plugin_object_sp)
    {
        return StructuredData::DictionarySP();
    }

    virtual StructuredData::ArraySP
    OSPlugin_ThreadsInfo(StructuredData::ObjectSP os_plugin_object_sp)
    {
        return StructuredData::ArraySP();
    }

    virtual StructuredData::StringSP
    OSPlugin_RegisterContextData(StructuredData::ObjectSP os_plugin_object_sp, lldb::tid_t thread_id)
    {
        return StructuredData::StringSP();
    }

    virtual StructuredData::DictionarySP
    OSPlugin_CreateThread(StructuredData::ObjectSP os_plugin_object_sp, lldb::tid_t tid, lldb::addr_t context)
    {
        return StructuredData::DictionarySP();
    }

    virtual StructuredData::ObjectSP
    CreateScriptedThreadPlan(const char *class_name, lldb::ThreadPlanSP thread_plan_sp)
    {
        return StructuredData::ObjectSP();
    }

    virtual bool
    ScriptedThreadPlanExplainsStop(StructuredData::ObjectSP implementor_sp, Event *event, bool &script_error)
    {
        script_error = true;
        return true;
    }

    virtual bool
    ScriptedThreadPlanShouldStop(StructuredData::ObjectSP implementor_sp, Event *event, bool &script_error)
    {
        script_error = true;
        return true;
    }

    virtual lldb::StateType
    ScriptedThreadPlanGetRunState(StructuredData::ObjectSP implementor_sp, bool &script_error)
    {
        script_error = true;
        return lldb::eStateStepping;
    }

    virtual StructuredData::ObjectSP
    LoadPluginModule(const FileSpec &file_spec, lldb_private::Error &error)
    {
        return StructuredData::ObjectSP();
    }

    virtual StructuredData::DictionarySP
    GetDynamicSettings(StructuredData::ObjectSP plugin_module_sp, Target *target, const char *setting_name, lldb_private::Error &error)
    {
        return StructuredData::DictionarySP();
    }

    virtual Error
    GenerateFunction(const char *signature, const StringList &input)
    {
        Error error;
        error.SetErrorString("unimplemented");
        return error;
    }

    virtual void 
    CollectDataForBreakpointCommandCallback (std::vector<BreakpointOptions *> &options,
                                             CommandReturnObject &result);

    virtual void 
    CollectDataForWatchpointCommandCallback (WatchpointOptions *wp_options,
                                             CommandReturnObject &result);

    /// Set the specified text as the callback for the breakpoint.
    Error
    SetBreakpointCommandCallback (std::vector<BreakpointOptions *> &bp_options_vec,
                                  const char *callback_text);

    virtual Error
    SetBreakpointCommandCallback (BreakpointOptions *bp_options,
                                  const char *callback_text)
    {
        Error error;
        error.SetErrorString("unimplemented");
        return error;
    }
    
    void
    SetBreakpointCommandCallbackFunction (std::vector<BreakpointOptions *> &bp_options_vec,
                                  const char *function_name);

    /// Set a one-liner as the callback for the breakpoint.
    virtual void 
    SetBreakpointCommandCallbackFunction (BreakpointOptions *bp_options,
                                  const char *function_name)
    {
    }
    
    /// Set a one-liner as the callback for the watchpoint.
    virtual void 
    SetWatchpointCommandCallback (WatchpointOptions *wp_options,
                                  const char *oneliner)
    {
    }

    virtual bool
    GetScriptedSummary(const char *function_name, lldb::ValueObjectSP valobj, StructuredData::ObjectSP &callee_wrapper_sp,
                       const TypeSummaryOptions &options, std::string &retval)
    {
        return false;
    }
    
    virtual void
    Clear ()
    {
        // Clean up any ref counts to SBObjects that might be in global variables
    }

    virtual size_t
    CalculateNumChildren(const StructuredData::ObjectSP &implementor, uint32_t max)
    {
        return 0;
    }

    virtual lldb::ValueObjectSP
    GetChildAtIndex(const StructuredData::ObjectSP &implementor, uint32_t idx)
    {
        return lldb::ValueObjectSP();
    }

    virtual int
    GetIndexOfChildWithName(const StructuredData::ObjectSP &implementor, const char *child_name)
    {
        return UINT32_MAX;
    }

    virtual bool
    UpdateSynthProviderInstance(const StructuredData::ObjectSP &implementor)
    {
        return false;
    }

    virtual bool
    MightHaveChildrenSynthProviderInstance(const StructuredData::ObjectSP &implementor)
    {
        return true;
    }

    virtual lldb::ValueObjectSP
    GetSyntheticValue(const StructuredData::ObjectSP &implementor)
    {
        return nullptr;
    }
    
    virtual bool
    RunScriptBasedCommand (const char* impl_function,
                           const char* args,
                           ScriptedCommandSynchronicity synchronicity,
                           lldb_private::CommandReturnObject& cmd_retobj,
                           Error& error,
                           const lldb_private::ExecutionContext& exe_ctx)
    {
        return false;
    }
    
    virtual bool
    RunScriptBasedCommand (StructuredData::GenericSP impl_obj_sp,
                           const char* args,
                           ScriptedCommandSynchronicity synchronicity,
                           lldb_private::CommandReturnObject& cmd_retobj,
                           Error& error,
                           const lldb_private::ExecutionContext& exe_ctx)
    {
        return false;
    }
    
    virtual bool
    RunScriptFormatKeyword (const char* impl_function,
                            Process* process,
                            std::string& output,
                            Error& error)
    {
        error.SetErrorString("unimplemented");
        return false;
    }

    virtual bool
    RunScriptFormatKeyword (const char* impl_function,
                            Thread* thread,
                            std::string& output,
                            Error& error)
    {
        error.SetErrorString("unimplemented");
        return false;
    }
    
    virtual bool
    RunScriptFormatKeyword (const char* impl_function,
                            Target* target,
                            std::string& output,
                            Error& error)
    {
        error.SetErrorString("unimplemented");
        return false;
    }
    
    virtual bool
    RunScriptFormatKeyword (const char* impl_function,
                            StackFrame* frame,
                            std::string& output,
                            Error& error)
    {
        error.SetErrorString("unimplemented");
        return false;
    }
    
    virtual bool
    RunScriptFormatKeyword (const char* impl_function,
                            ValueObject* value,
                            std::string& output,
                            Error& error)
    {
        error.SetErrorString("unimplemented");
        return false;
    }
    
    virtual bool
    GetDocumentationForItem (const char* item, std::string& dest)
    {
        dest.clear();
        return false;
    }
    
    virtual bool
    GetShortHelpForCommandObject (StructuredData::GenericSP cmd_obj_sp,
                                  std::string& dest)
    {
        dest.clear();
        return false;
    }
    
    virtual uint32_t
    GetFlagsForCommandObject (StructuredData::GenericSP cmd_obj_sp)
    {
        return 0;
    }

    virtual bool
    GetLongHelpForCommandObject (StructuredData::GenericSP cmd_obj_sp,
                                 std::string& dest)
    {
        dest.clear();
        return false;
    }
    
    virtual bool
    CheckObjectExists (const char* name)
    {
        return false;
    }

    virtual bool
    LoadScriptingModule(const char *filename, bool can_reload, bool init_session, lldb_private::Error &error,
                        StructuredData::ObjectSP *module_sp = nullptr)
    {
        error.SetErrorString("loading unimplemented");
        return false;
    }
    
    virtual bool
    IsReservedWord (const char* word)
    {
        return false;
    }
    
    virtual std::unique_ptr<ScriptInterpreterLocker>
    AcquireInterpreterLock ();
    
    const char *
    GetScriptInterpreterPtyName ();

    int
    GetMasterFileDescriptor ();

    CommandInterpreter &
    GetCommandInterpreter();

    static std::string
    LanguageToString (lldb::ScriptLanguage language);

    virtual void
    ResetOutputFileHandle (FILE *new_fh) { } //By default, do nothing.

protected:
    CommandInterpreter &m_interpreter;
    lldb::ScriptLanguage m_script_lang;
};

} // namespace lldb_private

#endif // liblldb_ScriptInterpreter_h_
