#!/usr/bin/python3
import json
import os
import sys


# Used to migrate storage format to include ACLs
def storage_migrate(storage):
    delete_keys = []
    if storage['type'] == 'hostPath':
        # Check if the key exists, if not we have already migrated
        if not storage.get('hostPath'):
            return storage

        storage['hostPathConfig'] = {'hostPath': storage['hostPath']}
        delete_keys.append('hostPath')

    if storage['type'] == 'ixVolume':
        # Check if the key exists, if not we have already migrated
        if not storage.get('datasetName'):
            return storage

        storage['ixVolumeConfig'] = {'datasetName': storage['datasetName']}
        delete_keys.append('datasetName')


    for key in delete_keys:
        del storage[key]

    return storage

# Used to migrate libraries to additionalStorages
def libraries_migrate(libraries):
    # Additional **Libraries** only had a field for hostPath, because Immich
    # had a requirement for both hostPath and mountPath to be the same,
    # now its no longer the case, so we can merge it with additionalStorages
    for idx, library in enumerate(libraries):
        libraries[idx].update({
            'type': 'hostPath',
            'mountPath': library['hostPath'],
            'hostPathConfig': {
                'hostPath': library['hostPath'],
            }
        })

        del libraries[idx]['hostPath']

    return libraries


def migrate(values):
    storage_key = 'immichStorage'
    storages = ['uploads', 'library', 'thumbs', 'profile', 'video', 'pgData', 'pgBackup']

    for storage in storages:
        values[storage_key][storage] = storage_migrate(values[storage_key][storage])

    # Migrate additionalLibraries,
    # if additionalLibraries does not exist, we have already migrated
    if libraries := values[storage_key].get('additionalLibraries', []):
        # If additionalLibraries exists, additionalStorages does not exist yet
        values[storage_key].update({
            'additionalStorages': libraries_migrate(libraries)
        })

        del values[storage_key]['additionalLibraries']

    return values


if __name__ == '__main__':
    if len(sys.argv) != 2:
        exit(1)

    if os.path.exists(sys.argv[1]):
        with open(sys.argv[1], 'r') as f:
            print(json.dumps(migrate(json.loads(f.read()))))