//go:build test

package photos

/*
#cgo CFLAGS: -I${SRCDIR}/../../bridge
#cgo LDFLAGS: -L${SRCDIR}/../../bridge -lphotokit_bridge_stub
#include "photokit_bridge.h"
#include <stdlib.h>

void photos_test_set_access(int rc);
void photos_test_set_albums(const char *json);
void photos_test_set_assets(const char *json);
void photos_test_set_tree(const char *json);
void photos_test_set_export_rc(int rc);
void photos_test_set_export_originals_rc(int rc);
void photos_test_set_backup_all_rc(int rc);
void photos_test_set_albums_null(void);
void photos_test_set_assets_null(void);
void photos_test_set_tree_null(void);
void photos_request_cancel(void);
void photos_test_set_export_preview_json(const char *json);
void photos_test_set_export_original_json(const char *json);
*/
import "C"

import "unsafe"

type CgoBridge struct{}

var DefaultBridge Bridge = &CgoBridge{}

func SetTestAccessRC(rc int)          { C.photos_test_set_access(C.int(rc)) }
func SetTestAlbumsJSON(json string)   { C.photos_test_set_albums(C.CString(json)) }
func SetTestAssetsJSON(json string)   { C.photos_test_set_assets(C.CString(json)) }
func SetTestTreeJSON(json string)     { C.photos_test_set_tree(C.CString(json)) }
func SetTestExportRC(rc int)          { C.photos_test_set_export_rc(C.int(rc)) }
func SetTestExportOriginalsRC(rc int) { C.photos_test_set_export_originals_rc(C.int(rc)) }
func SetTestBackupAllRC(rc int)       { C.photos_test_set_backup_all_rc(C.int(rc)) }
func SetTestAlbumsNull()              { C.photos_test_set_albums_null() }
func SetTestAssetsNull()              { C.photos_test_set_assets_null() }
func SetTestTreeNull()                { C.photos_test_set_tree_null() }
func SetTestExportPreviewJSON(json string) { C.photos_test_set_export_preview_json(C.CString(json)) }
func SetTestExportOriginalJSON(json string) { C.photos_test_set_export_original_json(C.CString(json)) }

func (*CgoBridge) RequestAccess() error {
	rc := C.photos_request_access()
	if rc != 0 {
		return errAccessDenied
	}
	return nil
}

func (*CgoBridge) ListAlbums() ([]Album, error) {
	cs := C.photos_list_albums_json()
	if cs == nil {
		return nil, errBridgeNil
	}
	defer C.photos_free_string(cs)
	return ParseAlbumsJSON(C.GoString(cs))
}

func (*CgoBridge) ListAssets(albumID string) ([]Asset, int, error) {
	cid := C.CString(albumID)
	defer C.free(unsafe.Pointer(cid))
	cs := C.photos_list_assets_json(cid)
	if cs == nil {
		return nil, 0, errBridgeNil
	}
	defer C.photos_free_string(cs)
	return ParseAssetsJSON(C.GoString(cs))
}

func (*CgoBridge) ListTree() ([]CollectionNode, error) {
	cs := C.photos_list_tree_json()
	if cs == nil {
		return nil, errBridgeNil
	}
	defer C.photos_free_string(cs)
	return ParseTreeJSON(C.GoString(cs))
}

func (*CgoBridge) ExportAlbumPreviews(albumID, outputDir string, targetSize int) (int, error) {
	cid := C.CString(albumID)
	defer C.free(unsafe.Pointer(cid))
	cdir := C.CString(outputDir)
	defer C.free(unsafe.Pointer(cdir))
	rc := C.photos_export_album_previews(cid, cdir, C.int(targetSize))
	return InterpretExportResult(int(rc))
}

func (*CgoBridge) ExportAlbumOriginals(albumID, outputDir string) (int, error) {
	cid := C.CString(albumID)
	defer C.free(unsafe.Pointer(cid))
	cdir := C.CString(outputDir)
	defer C.free(unsafe.Pointer(cdir))
	rc := C.photos_export_album_originals(cid, cdir)
	return InterpretExportResult(int(rc))
}

func (*CgoBridge) BackupAll(outputDir string, targetSize int, originals bool) (int, error) {
	cdir := C.CString(outputDir)
	defer C.free(unsafe.Pointer(cdir))

	coriginals := 0
	if originals {
		coriginals = 1
	}

	rc := C.photos_backup_all(cdir, C.int(targetSize), C.int(coriginals))
	return InterpretExportResult(int(rc))
}

func (*CgoBridge) Cancel() {
	C.photos_request_cancel()
}

func (*CgoBridge) ExportPreview(assetID, outputDir string, targetSize, index int) (ExportResult, error) {
	cid := C.CString(assetID)
	defer C.free(unsafe.Pointer(cid))
	cdir := C.CString(outputDir)
	defer C.free(unsafe.Pointer(cdir))
	cs := C.photos_export_preview_json(cid, cdir, C.int(targetSize), C.int(index))
	if cs == nil {
		return ExportResult{}, errBridgeNil
	}
	defer C.photos_free_string(cs)
	return ParseExportResultJSON(C.GoString(cs))
}

func (*CgoBridge) ExportOriginal(assetID, outputDir string, index int) (ExportResult, error) {
	cid := C.CString(assetID)
	defer C.free(unsafe.Pointer(cid))
	cdir := C.CString(outputDir)
	defer C.free(unsafe.Pointer(cdir))
	cs := C.photos_export_original_json(cid, cdir, C.int(index))
	if cs == nil {
		return ExportResult{}, errBridgeNil
	}
	defer C.photos_free_string(cs)
	return ParseExportResultJSON(C.GoString(cs))
}
