//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_geocode(const char *json);
void photos_test_set_geocode_null(void);
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_preview_json_null(void);
void photos_test_set_export_original_json(const char *json);
void photos_test_set_export_original_json_null(void);
void photos_test_set_progress_slot_count(int count);
void photos_test_set_progress_slots_null(int val);
*/
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 SetTestGeocodeJSON(json string)        { C.photos_test_set_geocode(C.CString(json)) }
func SetTestGeocodeNull()                   { C.photos_test_set_geocode_null() }
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 SetTestExportPreviewJSONNull()         { C.photos_test_set_export_preview_json_null() }
func SetTestExportOriginalJSON(json string) { C.photos_test_set_export_original_json(C.CString(json)) }
func SetTestExportOriginalJSONNull()        { C.photos_test_set_export_original_json_null() }
func SetTestProgressSlotCount(count int)    { C.photos_test_set_progress_slot_count(C.int(count)) }
func SetTestProgressSlotsNull(val int)      { C.photos_test_set_progress_slots_null(C.int(val)) }

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) ReverseGeocode(latitude, longitude float64) (Placemark, error) {
	cs := C.photos_reverse_geocode_json(C.double(latitude), C.double(longitude))
	if cs == nil {
		return Placemark{}, errBridgeNil
	}
	defer C.photos_free_string(cs)
	return ParsePlacemarkJSON(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) Cancel() {
	C.photos_request_cancel()
}

func (*CgoBridge) IsCancelled() bool {
	return C.photos_request_is_cancelled() != 0
}

func (*CgoBridge) ExportPreview(assetID, outputDir string, targetSize, quality, index int) (ExportResult, error) {
	return exportPreviewWithSlotTest(assetID, outputDir, targetSize, quality, index, -1)
}

func (*CgoBridge) ExportOriginal(assetID, outputDir string, index int) (ExportResult, error) {
	return exportOriginalWithSlotTest(assetID, outputDir, index, -1)
}

func (*CgoBridge) ExportPreviewWithSlot(assetID, outputDir string, targetSize, quality, index, slotIndex int) (ExportResult, error) {
	return exportPreviewWithSlotTest(assetID, outputDir, targetSize, quality, index, slotIndex)
}

func (*CgoBridge) ExportOriginalWithSlot(assetID, outputDir string, index, slotIndex int) (ExportResult, error) {
	return exportOriginalWithSlotTest(assetID, outputDir, index, slotIndex)
}

func exportPreviewWithSlotTest(assetID, outputDir string, targetSize, quality, index, slotIndex 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(quality), C.int(index), C.int(slotIndex))
	if cs == nil {
		return ExportResult{}, errBridgeNil
	}
	defer C.photos_free_string(cs)
	return ParseExportResultJSON(C.GoString(cs))
}

func exportOriginalWithSlotTest(assetID, outputDir string, index, slotIndex 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), C.int(slotIndex))
	if cs == nil {
		return ExportResult{}, errBridgeNil
	}
	defer C.photos_free_string(cs)
	return ParseExportResultJSON(C.GoString(cs))
}

type ExportProgressSlot struct {
	Active     bool
	Progress   float64
	BytesDone  int64
	BytesTotal int64
}

func GetProgressSlots() []ExportProgressSlot {
	count := int(C.photos_get_progress_slot_count())
	if count <= 0 {
		return nil
	}
	cSlots := C.photos_get_progress_slots()
	if cSlots == nil {
		return nil
	}
	slots := make([]ExportProgressSlot, count)
	for i := 0; i < count; i++ {
		s := C.photos_get_progress_slot(cSlots, C.int(i))
		slots[i] = ExportProgressSlot{
			Active:     s.active != 0,
			Progress:   float64(s.progress),
			BytesDone:  int64(s.bytes_done),
			BytesTotal: int64(s.bytes_total),
		}
	}
	return slots
}

func ResetProgressSlots() {
	C.photos_reset_progress_slots()
}

func GetProgressSlotCount() int {
	return int(C.photos_get_progress_slot_count())
}