import { JSONSchema4, JSONSchema6, JSONSchema7 } from 'json-schema';

const v4_schemas = new Set([
	'http://json-schema.org/schema#',
	'https://json-schema.org/schema#',
	'http://json-schema.org/schema',
	'https://json-schema.org/schema',
	'http://json-schema.org/hyper-schema#',
	'https://json-schema.org/hyper-schema#',
	'http://json-schema.org/hyper-schema',
	'https://json-schema.org/hyper-schema',
	'http://json-schema.org/draft-04/schema#',
	'https://json-schema.org/draft-04/schema#',
	'http://json-schema.org/draft-04/schema',
	'https://json-schema.org/draft-04/schema',
	'http://json-schema.org/draft-04/hyper-schema#',
	'https://json-schema.org/draft-04/hyper-schema#',
	'http://json-schema.org/draft-04/hyper-schema',
	'https://json-schema.org/draft-04/hyper-schema',
	'http://json-schema.org/draft-03/schema#',
	'https://json-schema.org/draft-03/schema#',
	'http://json-schema.org/draft-03/schema',
	'https://json-schema.org/draft-03/schema',
	'http://json-schema.org/draft-03/hyper-schema#',
	'https://json-schema.org/draft-03/hyper-schema#',
	'http://json-schema.org/draft-03/hyper-schema',
	'https://json-schema.org/draft-03/hyper-schema',
])

export function is_json_schema_draft4(data: unknown) : data is JSONSchema4 {
	return v4_schemas.has(data?.['$schema']);
}

const v6_schemas = new Set([
	'http://json-schema.org/schema#',
	'https://json-schema.org/schema#',
	'http://json-schema.org/schema',
	'https://json-schema.org/schema',
	'http://json-schema.org/hyper-schema#',
	'https://json-schema.org/hyper-schema#',
	'http://json-schema.org/hyper-schema',
	'https://json-schema.org/hyper-schema',
	'http://json-schema.org/draft-06/schema#',
	'https://json-schema.org/draft-06/schema#',
	'http://json-schema.org/draft-06/schema',
	'https://json-schema.org/draft-06/schema',
	'http://json-schema.org/draft-06/hyper-schema#',
	'https://json-schema.org/draft-06/hyper-schema#',
	'http://json-schema.org/draft-06/hyper-schema',
	'https://json-schema.org/draft-06/hyper-schema',
]);

export function is_json_schema_draft6(data: unknown) : data is JSONSchema6 {
	return v6_schemas.has(data?.['$schema']);
}

const v7_schemas = new Set([
	'http://json-schema.org/schema#',
	'https://json-schema.org/schema#',
	'http://json-schema.org/schema',
	'https://json-schema.org/schema',
	'http://json-schema.org/hyper-schema#',
	'https://json-schema.org/hyper-schema#',
	'http://json-schema.org/hyper-schema',
	'https://json-schema.org/hyper-schema',
	'http://json-schema.org/draft-07/schema#',
	'https://json-schema.org/draft-07/schema#',
	'http://json-schema.org/draft-07/schema',
	'https://json-schema.org/draft-07/schema',
	'http://json-schema.org/draft-07/hyper-schema#',
	'https://json-schema.org/draft-07/hyper-schema#',
	'http://json-schema.org/draft-07/hyper-schema',
	'https://json-schema.org/draft-07/hyper-schema',
]);

export function is_json_schema_draft7(data: unknown) : data is JSONSchema7 {
	return v7_schemas.has(data?.['$schema']);
}