#include "pxl8_io.h"
#include "pxl8_mem.h"

#include <string.h>

#ifndef _WIN32
#include <sys/stat.h>
#include <unistd.h>
#else
#include <direct.h>
#endif

#include <SDL3/SDL.h>

pxl8_result pxl8_io_create_directory(const char* path) {
    if (!path) return PXL8_ERROR_NULL_POINTER;
    return SDL_CreateDirectory(path) ? PXL8_OK : PXL8_ERROR_SYSTEM_FAILURE;
}

typedef struct {
    pxl8_io_dir_callback callback;
    void* userdata;
} pxl8_io_enum_ctx;

static SDL_EnumerationResult pxl8_io_enum_adapter(void* userdata, const char* dirname, const char* fname) {
    pxl8_io_enum_ctx* ctx = userdata;
    if (ctx->callback(ctx->userdata, dirname, fname)) {
        return SDL_ENUM_CONTINUE;
    }
    return SDL_ENUM_SUCCESS;
}

bool pxl8_io_enumerate_directory(const char* path, pxl8_io_dir_callback callback, void* userdata) {
    if (!path || !callback) return false;
    pxl8_io_enum_ctx ctx = { .callback = callback, .userdata = userdata };
    return SDL_EnumerateDirectory(path, pxl8_io_enum_adapter, &ctx);
}

bool pxl8_io_file_exists(const char* path) {
    if (!path) return false;
    return SDL_GetPathInfo(path, NULL);
}

char* pxl8_io_get_cwd(void) {
    char* sdl_cwd = SDL_GetCurrentDirectory();
    if (!sdl_cwd) return NULL;
    char* cwd = pxl8_malloc(strlen(sdl_cwd) + 1);
    if (cwd) strcpy(cwd, sdl_cwd);
    SDL_free(sdl_cwd);
    return cwd;
}

f64 pxl8_io_get_file_modified_time(const char* path) {
    if (!path) return 0.0;
    SDL_PathInfo info;
    if (SDL_GetPathInfo(path, &info)) {
        return (f64)info.modify_time / 1000000000.0;
    }
    return 0.0;
}

usize pxl8_io_get_file_size(const char* path) {
    if (!path) return 0;
    SDL_PathInfo info;
    if (SDL_GetPathInfo(path, &info)) return (usize)info.size;
    return 0;
}

char* pxl8_io_get_pref_path(const char* org, const char* app) {
    char* sdl_path = SDL_GetPrefPath(org, app);
    if (!sdl_path) return NULL;
    char* path = pxl8_malloc(strlen(sdl_path) + 1);
    if (path) strcpy(path, sdl_path);
    SDL_free(sdl_path);
    return path;
}

char* pxl8_io_get_real_path(const char* path) {
    if (!path) return NULL;

    if (path[0] == '/') {
        char* result = pxl8_malloc(strlen(path) + 1);
        if (result) strcpy(result, path);
        return result;
    }

    char* cwd = SDL_GetCurrentDirectory();
    if (!cwd) return NULL;

    usize cwd_len = strlen(cwd);
    usize path_len = strlen(path);
    char* result = pxl8_malloc(cwd_len + path_len + 2);
    if (result) {
        strcpy(result, cwd);
        if (cwd_len > 0 && cwd[cwd_len - 1] != '/') {
            strcat(result, "/");
        }
        strcat(result, path);
    }

    SDL_free(cwd);
    return result;
}

bool pxl8_io_set_cwd(const char* path) {
    if (!path) return false;
#ifdef _WIN32
    return _chdir(path) == 0;
#else
    return chdir(path) == 0;
#endif
}

void pxl8_io_set_executable(const char* path) {
    if (!path) return;
#ifndef _WIN32
    chmod(path, 0755);
#endif
}

bool pxl8_io_is_directory(const char* path) {
    if (!path) return false;
    SDL_PathInfo info;
    return SDL_GetPathInfo(path, &info) && info.type == SDL_PATHTYPE_DIRECTORY;
}