import { truncateLeadingGraphemes } from "../truncation.js";
import { defineModule } from "../types.js";

export const gitBranchModule = defineModule({
	name: "git_branch",
	variables: ["symbol", "branch", "remote_name", "remote_branch"],
	defaults: {
		format: "[ $symbol $branch ]($style)",
		symbol: "🌿",
		style: "bold purple",
		disabled: false,
	},
	options: {
		// Starship uses i64::MAX as its effective no-truncation default. Zero is the
		// equivalent stable TOML representation in pi-starship's bounded integer schema.
		truncation_length: { kind: "integer", default: 0, minimum: 0, maximum: 1_000_000 },
		truncation_symbol: { kind: "string", default: "…" },
	},
	values: ({ runtime, options }) => {
		const branch = runtime.gitBranchDetails;
		const name = branch?.name ?? runtime.gitBranch;
		if (!name) return undefined;
		const length = typeof options.truncation_length === "number" ? options.truncation_length : 0;
		const symbol = typeof options.truncation_symbol === "string" ? options.truncation_symbol : "…";
		return {
			branch: truncateLeadingGraphemes(name, length, symbol),
			remote_name: truncateLeadingGraphemes(branch?.remoteName ?? "", length, symbol),
			remote_branch: truncateLeadingGraphemes(branch?.remoteBranch ?? "", length, symbol),
		};
	},
});