// Minimal Shiki / TextMate grammar for the RDBMS Playground *simple-mode*
// command language, so docs code blocks fenced as ```rdbms get syntax
// highlighting. Advanced-mode examples use the built-in `sql` grammar.
//
// Keyword/clause vocabulary is taken from the in-app help/usage strings
// (`src/friendly/strings/en-US.yaml`) and the command grammar. Matching is
// case-insensitive (keywords are case-insensitive in the app; identifiers
// are case-preserving and intentionally left unscoped so they read as plain
// text against the coloured keywords).
//
// Two language ids share one grammar:
//   - `rdbms`        — real commands; gets a decorative `> ` prompt via CSS.
//   - `rdbms-syntax` — abstract syntax templates (with <placeholders>); same
//                      highlighting, but a distinct `data-language` so the
//                      prompt (scoped to data-language='rdbms') is NOT added.

const patterns = [
	{ include: '#comment' },
	{ include: '#string' },
	{ include: '#flag' },
	{ include: '#number' },
	{ include: '#constant' },
	{ include: '#type' },
	{ include: '#keyword' },
];

const repository = {
	comment: {
		match: '#.*$',
		name: 'comment.line.number-sign.rdbms',
	},
	string: {
		name: 'string.quoted.single.rdbms',
		begin: "'",
		end: "'",
		patterns: [{ match: "''", name: 'constant.character.escape.rdbms' }],
	},
	flag: {
		match: '--[A-Za-z][A-Za-z-]*',
		name: 'keyword.operator.flag.rdbms',
	},
	number: {
		match: '\\b[0-9]+(?:\\.[0-9]+)?\\b',
		name: 'constant.numeric.rdbms',
	},
	constant: {
		match: '(?i)\\b(true|false|null)\\b',
		name: 'constant.language.rdbms',
	},
	type: {
		match: '(?i)\\b(text|int|real|decimal|bool|date|datetime|serial|shortid)\\b',
		name: 'support.type.rdbms',
	},
	keyword: {
		match:
			'(?i)\\b(create|table|tables|drop|add|column|with|pk|to|from|into|values|insert|update|seed|set|where|delete|show|data|rename|change|alter|relationship|relationships|index|indexes|on|as|references|constraint|not|unique|default|check|primary|key|cascade|restrict|and|or|in|between|like|is|explain|replay|undo|redo|save|new|load|rebuild|export|import|copy|mode|help|hint|quit|messages|all|last|types|simple|advanced)\\b',
		name: 'keyword.control.rdbms',
	},
};

/** Real simple-mode commands — gets the `> ` prompt (via CSS). */
export default {
	name: 'rdbms',
	scopeName: 'source.rdbms',
	aliases: ['rdbms-playground'],
	patterns,
	repository,
};

/** Abstract syntax templates — same highlighting, no prompt. */
export const rdbmsSyntax = {
	name: 'rdbms-syntax',
	scopeName: 'source.rdbms-syntax',
	patterns,
	repository,
};
