//go:build !test

package photos

/*
#cgo CFLAGS: -I${SRCDIR}/../../bridge
#cgo LDFLAGS: -L${SRCDIR}/../../bridge -lphotokit_bridge -framework Photos -framework Foundation -framework AppKit -framework UniformTypeIdentifiers -framework CoreLocation -framework MapKit
#include "photokit_bridge.h"
#include <stdlib.h>
*/
import "C"

import "unsafe"

type CgoBridge struct{}

var DefaultBridge Bridge = &CgoBridge{}

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 exportPreviewWithSlot(assetID, outputDir, targetSize, quality, index, -1)
}

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

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

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

func exportPreviewWithSlot(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 exportOriginalWithSlot(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))
}

func GetProgressSlots() []ExportProgressSlot {
	count := int(C.photos_get_progress_slot_count())
	slots := C.photos_get_progress_slots()
	if slots == nil || count == 0 {
		return nil
	}
	result := make([]ExportProgressSlot, count)
	for i := 0; i < count; i++ {
		ptr := (*C.export_progress_t)(unsafe.Pointer(uintptr(unsafe.Pointer(slots)) + uintptr(i)*unsafe.Sizeof(C.export_progress_t{})))
		result[i] = ExportProgressSlot{
			Active:     ptr.active != 0,
			Progress:   float64(ptr.progress),
			BytesDone:  int64(ptr.bytes_done),
			BytesTotal: int64(ptr.bytes_total),
		}
	}
	return result
}

func ResetProgressSlots() {
	C.photos_reset_progress_slots()
}

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

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