#include "error.h"
#include "arena.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>

void error_init(ErrorList* list, Arena* a) {
    list->capacity = 64;
    list->errors = arena_alloc(a, list->capacity * sizeof(ErrorInfo));
    list->count = 0;
    list->arena = a;
    if (!list->errors) list->capacity = 0;
}

void error_add(ErrorList* list, const char* filename, int line, int col, const char* fmt, ...) {
    if (!list->errors) return;
    if (list->count >= list->capacity) {
        size_t new_cap = list->capacity + 64;
        ErrorInfo* new_errs = arena_alloc(list->arena, new_cap * sizeof(ErrorInfo));
        if (!new_errs) return;
        memcpy(new_errs, list->errors, list->capacity * sizeof(ErrorInfo));
        list->errors = new_errs;
        list->capacity = new_cap;
    }
    char buf[512];
    va_list args;
    va_start(args, fmt);
    int n = vsnprintf(buf, sizeof(buf), fmt, args);
    va_end(args);
    if (n < 0) return;
    char* msg = arena_strdup(list->arena, buf);
    char* fname = arena_strdup(list->arena, filename);
    if (!msg || !fname) return;
    list->errors[list->count++] = (ErrorInfo){
        .message = msg,
        .filename = fname,
        .line = line,
        .col = col,
    };
}

void error_print(const ErrorList* list) {
    for (size_t i = 0; i < list->count; i++) {
        const ErrorInfo* e = &list->errors[i];
        fprintf(stderr, "\033[1;31m错误:\033[0m %s:%d:%d: %s\n",
                e->filename, e->line, e->col, e->message);
    }
}