//
// Instance and token management: sign in, sign out, test, add, remove.
//

const config = require("../util/config.js");
const credentials = require("../gitea/credentials.js");
const selection = require("./selection.js");
const ui = require("../ui.js");

const TOKEN_HELP =
    "Create one in Gitea under Settings → Applications → Access Tokens with " +
    "repository, issue, and Actions read scopes (plus write scopes for reviews, " +
    "secrets, and variables).";

/** Picks the instance a command applies to, prompting only when ambiguous. */
async function resolveInstance(argument, prompt) {
    const node = selection.selectedNode(argument);
    if (node && node.data && node.data.baseUrl) return node.data.baseUrl;

    const repo = node && node.repo ? node.repo : null;
    if (repo) return repo.baseUrl;

    const urls = config.instances();
    if (!urls.length) {
        ui.warn("No Gitea instance is configured. Open the extension preferences first.");
        return null;
    }
    if (urls.length === 1) return urls[0];

    return await ui.choose(urls, { placeholder: prompt });
}

function register(store, refresh) {
    nova.commands.register("gitea.setToken", async (argument) => {
        const baseUrl = await resolveInstance(argument, "Set a token for which instance?");
        if (!baseUrl) return;

        const token = await ui.input(`Personal access token for ${baseUrl}`, {
            placeholder: "Access token",
            prompt: TOKEN_HELP,
            secure: true,
        });
        if (!token) return;

        try {
            credentials.setToken(baseUrl, token.trim());
        } catch (error) {
            ui.error(`Could not save the token to the Keychain: ${error.message || error}`);
            return;
        }

        store.router.invalidate();
        const api = store.router.apiFor(baseUrl);
        try {
            const [version, user] = await Promise.all([api.version(), api.currentUser()]);
            ui.info(`Signed in to ${baseUrl} as ${user.login} (Gitea ${version}).`);
        } catch (error) {
            ui.error(`Token saved, but ${baseUrl} rejected it: ${error.message || error}`);
        }
        await refresh({ rediscover: true });
    });

    nova.commands.register("gitea.clearToken", async (argument) => {
        const baseUrl = await resolveInstance(argument, "Sign out of which instance?");
        if (!baseUrl) return;
        if (!(await ui.confirm(`Remove the stored token for ${baseUrl}?`, "Sign Out"))) return;

        credentials.removeToken(baseUrl);
        store.router.invalidate();
        ui.info(`Signed out of ${baseUrl}.`);
        await refresh({ rediscover: true });
    });

    nova.commands.register("gitea.testConnection", async (argument) => {
        const baseUrl = await resolveInstance(argument, "Test which instance?");
        if (!baseUrl) return;

        if (!credentials.hasToken(baseUrl)) {
            ui.warn(`No token stored for ${baseUrl}. Run “Set Token…” first.`);
            return;
        }

        const api = store.router.apiFor(baseUrl);
        try {
            const [version, user] = await Promise.all([api.version(), api.currentUser()]);
            ui.info(`${baseUrl} is reachable — Gitea ${version}, signed in as ${user.login}.`);
        } catch (error) {
            ui.error(`${baseUrl} failed: ${error.message || error}`);
        }
        await refresh();
    });

    nova.commands.register("gitea.addInstance", async () => {
        const entered = await ui.input("Add a Gitea instance", {
            placeholder: "https://gitea.example.com",
            prompt: "Repositories are routed to an instance by matching their git remote host.",
        });
        if (!entered) return;

        const baseUrl = config.normalizeBaseUrl(entered);
        if (!baseUrl) {
            ui.warn("That does not look like a URL.");
            return;
        }
        if (config.instances().includes(baseUrl)) {
            ui.info(`${baseUrl} is already configured.`);
            return;
        }

        const extra = nova.config.get("gitea.instances", "array") || [];
        config.setInstances([...extra, baseUrl]);
        store.router.invalidate();

        if (await ui.confirm(`Added ${baseUrl}. Set a token for it now?`, "Set Token")) {
            await nova.commands.invoke("gitea.setToken", { kind: "instance", data: { baseUrl } });
        } else {
            await refresh({ rediscover: true });
        }
    });

    nova.commands.register("gitea.removeInstance", async (argument) => {
        const extra = nova.config.get("gitea.instances", "array") || [];
        if (!extra.length) {
            ui.info("The default instance is set in preferences and cannot be removed here.");
            return;
        }

        const node = selection.selectedNode(argument);
        let baseUrl = node && node.data ? node.data.baseUrl : null;
        if (!baseUrl || !extra.includes(baseUrl)) {
            baseUrl = await ui.choose(extra, { placeholder: "Remove which instance?" });
        }
        if (!baseUrl) return;
        if (!(await ui.confirm(`Remove ${baseUrl} and its stored token?`, "Remove"))) return;

        credentials.removeToken(baseUrl);
        config.setInstances(extra.filter((url) => url !== baseUrl));
        store.router.invalidate();
        await refresh({ rediscover: true });
    });

    nova.commands.register("gitea.openPreferences", () => {
        nova.openConfig();
    });
}

exports.register = register;
exports.resolveInstance = resolveInstance;