#ifndef AMALGAM_PARSER_H
#define AMALGAM_PARSER_H

#include "std/buffer_view.h"
#include "std/scoped_allocator.h"
#include "std/thread.h"
#include "tokenizer.h"
#include "ast.h"
#include "defs.h"

#include <setjmp.h>

#define PARSER_OK 0
/* General error */
#define PARSER_ERR -1
#define PARSER_UNEXPECTED_TOKEN -2

typedef enum {
    PARSER_THREAD_STATUS_NEW,
    PARSER_THREAD_STATUS_IDLE,
    PARSER_THREAD_STATUS_RUNNING
} ParserThreadStatus;

struct ParserThreadData {
    amal_thread thread;
    ParserThreadStatus status;
    ScopedAllocator allocator;
};

typedef enum {
    ERROR_CONTEXT_NONE,
    ERROR_CONTEXT_RHS_START
} ErrorContext;

struct Parser {
    Tokenizer tokenizer;
    Scope scope;
    ScopedAllocator *allocator; /* borrowed. Copied from @compiler for faster access to allocator */
    amal_compiler *compiler;
    bool started;
    TokenizerError error;
    ErrorContext error_context;
    jmp_buf parse_env;
};

CHECK_RESULT int parser_thread_data_init(ParserThreadData *self);
CHECK_RESULT int parser_thread_data_deinit(ParserThreadData *self);
CHECK_RESULT int parser_thread_data_start(ParserThreadData *self, AmalThreadCallbackFunc callback_func, void *userdata);
CHECK_RESULT int parser_thread_data_join(ParserThreadData *self, void **result);

CHECK_RESULT int parser_init(Parser *self, amal_compiler *compiler, ScopedAllocator *allocator);

/*
@buffer_name will be the path to the file when using parser_parse_file and when parsing a buffer
you can name the buffer anything  you want to identify it.
Should only be called once for a parser object.
*/
CHECK_RESULT int parser_parse_buffer(Parser *self, BufferView code_buffer, BufferView buffer_name);
/*
Parses a file and the dependencies that are included using @import.
Should only be called once for a parser object.
*/
CHECK_RESULT int parser_parse_file(Parser *self, BufferView filepath);

#endif