import { Entry } from "npm:@napi-rs/keyring";

export class CredentialManager {
    constructor(
        private credentialsFile: string,
        private tokenName: string
    ) {}
    
    async storeCredentials(username: string, token: string): Promise<void> {
        // Store username
        await Deno.writeTextFile(this.credentialsFile, username);
        
        // Store token in keyring
        const entry = new Entry(this.tokenName, username);
        if (entry.getPassword()) {
            entry.deletePassword();
        }
        entry.setPassword(token);
    }
    
    async getCredentials(): Promise<{ username: string, token: string } | undefined> {
        try {
            const username = await Deno.readTextFile(this.credentialsFile);
            const entry = new Entry(this.tokenName, username);
            const token = entry.getPassword();
            
            if (!token) {
                console.error("No token found in keyring. Please login first.");
                return undefined;
            }
            
            return { username, token };
        } catch (error) {
            console.error("No credentials found. Please login first.");
            return undefined;
        }
    }
    
    async clearCredentials(username: string): Promise<void> {
        // Remove username file
        try {
            await Deno.remove(this.credentialsFile);
        } catch (error) {
            console.error("Failed to remove credentials file:", error);
        }
        
        // Remove token from keyring
        const entry = new Entry(this.tokenName, username);
        if (entry.getPassword()) {
            entry.deletePassword();
        }
    }
}