#pragma once

// ============================================================================
// block_executor.h - 积木执行引擎
// ============================================================================

#include "block_workspace.h"

#define MAX_VARIABLES 256
#define MAX_CALL_STACK 32
#define MAX_EXEC_STACK 1024

// 变量
typedef struct {
    char name[64];
    SlotValue value;
    int used;
} Variable;

// 调用帧
typedef struct {
    Block* block;
    Block* return_block;
} CallFrame;

// 执行状态
typedef enum {
    EXEC_IDLE = 0,
    EXEC_RUNNING,
    EXEC_WAITING,
    EXEC_PAUSED,
    EXEC_ERROR
} ExecState;

// 执行器
typedef struct BlockExecutor {
    BlockWorkspace* workspace;
    ExecState state;
    
    Variable variables[MAX_VARIABLES];
    int variable_count;
    
    CallFrame call_stack[MAX_CALL_STACK];
    int call_stack_top;
    
    Block* current_block;
    double wait_timer;
    
    int breakpoint_enabled;
    Block* breakpoint_block;
} BlockExecutor;

// 初始化/销毁
BlockExecutor* executor_create(BlockWorkspace* ws);
void executor_destroy(BlockExecutor* exec);

// 控制
void executor_start(BlockExecutor* exec);
void executor_stop(BlockExecutor* exec);
void executor_pause(BlockExecutor* exec);
void executor_resume(BlockExecutor* exec);
void executor_step(BlockExecutor* exec);

// 更新 (每帧调用)
void executor_update(BlockExecutor* exec, double delta_time);

// 变量操作
void executor_set_variable(BlockExecutor* exec, const char* name, SlotValue value);
SlotValue executor_get_variable(BlockExecutor* exec, const char* name);
void executor_create_variable(BlockExecutor* exec, const char* name);

// 日志回调
typedef void (*LogCallback)(const char* msg, int level);
void executor_set_log_callback(LogCallback cb);