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import { _ITable, _ISelection, IValue, _IIndex, _IDb, IndexKey, setId, _ISchema, _Transaction, _Explainer } from '../../interfaces-private.ts';import { Schema, nil } from '../../interfaces.ts';import { Types } from '../../datatypes/index.ts';import { TableIndex } from '../table-index.ts';import { ReadOnlyTable } from '../readonly-table.ts';
const IS_SCHEMA = Symbol('_is_schema');export class TablesSchema extends ReadOnlyTable implements _ITable {
    get ownSymbol() {        return IS_SCHEMA;    }
    isOriginOf(v: IValue): boolean {        return v.origin === this || v.origin === this.selection;    }
    _schema: Schema = {        name: 'tables',        fields: [            { name: 'table_catalog', type: Types.text() }            , { name: 'table_schema', type: Types.text() }            , { name: 'table_name', type: Types.text() }            , { name: 'table_type', type: Types.text() }            , { name: 'self_referencing_column_name', type: Types.text() }            , { name: 'reference_generation', type: Types.text() }            , { name: 'user_defined_type_catalog', type: Types.text() }            , { name: 'user_defined_type_schema', type: Types.text() }            , { name: 'user_defined_type_name', type: Types.text() }            , { name: 'is_insertable_into', type: Types.text(3) }            , { name: 'is_typed', type: Types.text(3) }            , { name: 'commit_action', type: Types.text() }        ]    };
    entropy(t: _Transaction): number {        return this.db.listSchemas()            .reduce((tot, s) => tot + s.tablesCount(t), 0);    }
    *enumerate(t: _Transaction) {        for (const s of this.db.listSchemas()) {            for (const it of s.listTables(t)) {                yield this.make(it);            }        }    }
    make(t: _ITable<any>): any {        if (!t) {            return null;        }        const ret = {            table_catalog: 'pgmem',            table_schema: 'public',            table_name: t.name,            table_type: 'BASE TABLE',            self_referencing_column_name: null,            reference_generation: null,            user_defined_type_catalog: null,            user_defined_type_schema: null,            user_defined_type_name: null,            is_insertable_into: 'YES',            is_typed: 'NO',            commit_action: null,            [IS_SCHEMA]: true,        };        setId(ret, '/schema/table/' + t.name);        return ret;    }
    hasItem(value: any): boolean {        return !!value?.[IS_SCHEMA];    }
    getIndex(forValue: IValue<any>): _IIndex<any> | nil {        if (forValue?.id === 'table_name') {            return new TableIndex(this, forValue);        }        return null;    }
}