"""Phase-local removal of storage navigation, never facts or database cells."""
import copy

NOTICE = "Model view omits storage hashes, byte sizes, archive/member navigation and JSON pointers from provenance containers. Source/evidence IDs, origins, authors, times, facts, rows, scope and uncertainty retain their meaning. Omitted navigation is not absence evidence; the complete immutable context is archived."


def project(value):
    result = copy.deepcopy(value)
    def provenance(node):
        if isinstance(node, list): return [provenance(x) for x in node]
        if not isinstance(node, dict): return node
        return {k: provenance(v) if k in ('origin', 'provenance') else v
                for k, v in node.items()
                if k not in ('json_pointer', 'archive_ref', 'member_name', 'sha256', 'size')
                and not (v is None and k in ('author', 'observed_at'))}
    def visit(node):
        if isinstance(node, list):
            for x in node: visit(x)
        elif isinstance(node, dict):
            # Values in literal DB/source data must not be interpreted as metadata.
            for k, v in list(node.items()):
                if k in ('row', 'rows', 'value', 'values', 'text', 'lines'): continue
                if k in ('provenance', 'origin'):
                    node[k] = provenance(v)
                else: visit(v)
    visit(result)
    if isinstance(result, dict):
        evidence = result.get('evidence', {})
        for entry in result.get('evidence_catalog', []):
            if isinstance(entry, dict) and entry.get('id') in evidence:
                # The complete capture/query/provenance is already visible.
                eid = entry['id']
                collector = entry.get('collector')
                entry.clear()
                entry.update(id=eid, collector=collector, details_in='evidence')
        if result != value: result['navigation_projection'] = NOTICE
    return result