#include "compiler.h"
#include <stdlib.h>

size_t common_string_hash_djb2(const unsigned char* value, size_t length)
{
    size_t hash = 5381;
    for (size_t i = 0; i < length && value[i] != '\0'; ++i)
        hash = ((hash << 5) + hash) + value[i];
    return hash;
}

int string_symbol_map_construct(StringSymbolMap* map)
{
    const size_t start_capacity = 4;
    *map = (StringSymbolMap) {
        .data = malloc(sizeof(StringSymbolMap) * start_capacity),
        .length = 0,
        .capacity = start_capacity,
    };
    if (map->data == NULL) {
        return -1;
    }
    return 0;
}

void string_symbol_map_destroy(StringSymbolMap* map)
{
    if (map->data != NULL) {
        free(map->data);
    }
}

Symbol* string_symbol_map_get(const StringSymbolMap* map, size_t key_hash)
{
    for (size_t i = 0; i < map->length; ++i) {
        if (map->data[i].key_hash == key_hash) {
            return &map->data[i].value;
        }
    }
    return NULL;
}

int string_symbol_map_set(StringSymbolMap* map, size_t key_hash, Symbol value)
{
    Symbol* existing = string_symbol_map_get(map, key_hash);
    if (existing != NULL) {
        *existing = value;
        return 0;
    }
    if (map->length + 1 >= map->capacity) {
        map->capacity *= 2;
        StringSymbolMapEntry* data
            = realloc(map->data, sizeof(StringSymbolMapEntry) * map->capacity);
        if (data == NULL) {
            return -1;
        }
        map->data = data;
    }
    map->data[map->length] = (StringSymbolMapEntry) { key_hash, value };
    map->length += 1;
    return 0;
}

void checker_construct(Checker* checker)
{
    *checker = (Checker) {
        .failed = false,
    };
}

bool checker_failed(const Checker* checker) { return checker->failed; }

void checker_check_statements(Checker* checker, ASTNode* node)
{
    for (size_t i = 0; i < node->statements.length; ++i) { }
}