import fs from "node:fs/promises";
import path from "node:path";
import { logger } from "@/utils/logger";

/**
 * Ensures .tenex is in the project's .gitignore file
 */
export async function ensureTenexInGitignore(projectPath: string): Promise<void> {
    const gitignorePath = path.join(projectPath, ".gitignore");

    try {
        let gitignoreContent = "";

        // Check if .gitignore exists
        try {
            gitignoreContent = await fs.readFile(gitignorePath, "utf-8");
        } catch {
            // .gitignore doesn't exist, we'll create it
            logger.info("No .gitignore found, will create one");
        }

        // Check if .tenex is already in .gitignore
        const lines = gitignoreContent.split("\n");
        const hasTenexEntry = lines.some(
            (line) =>
                line.trim() === ".tenex" ||
                line.trim() === ".tenex/" ||
                line.trim() === "/.tenex" ||
                line.trim() === "/.tenex/"
        );

        if (!hasTenexEntry) {
            // Add .tenex to .gitignore
            const updatedContent = gitignoreContent.trim()
                ? `${gitignoreContent.trim()}\n\n# TENEX project files\n.tenex/\n`
                : "# TENEX project files\n.tenex/\n";

            await fs.writeFile(gitignorePath, updatedContent);
            logger.info("Added .tenex/ to .gitignore");
        } else {
            logger.info(".tenex already in .gitignore");
        }
    } catch (error) {
        logger.error("Failed to update .gitignore", { error });
        throw error;
    }
}