import { Hono } from "hono";
import { getAllConfig, getConfig, getDb, getEnvLockedKeys, reseedDefaults, setConfig } from "../db/index";
import { getUsers, testConnection as testJellyfin } from "../services/jellyfin";
import { getMqttStatus, startMqttClient, testMqttConnection } from "../services/mqtt";
import { testConnection as testRadarr } from "../services/radarr";
import { getScheduleConfig, type ScheduleConfig, updateScheduleConfig } from "../services/scheduler";
import { testConnection as testSonarr } from "../services/sonarr";

const app = new Hono();

app.get("/", (c) => {
	const config = getAllConfig();
	const envLocked = Array.from(getEnvLockedKeys());
	return c.json({ config, envLocked });
});

app.post("/jellyfin", async (c) => {
	const body = await c.req.json<{ url: string; api_key: string }>();
	const url = body.url?.replace(/\/$/, "");
	const apiKey = body.api_key;

	if (!url || !apiKey) return c.json({ ok: false, error: "URL and API key are required" }, 400);

	// Save first so the user's input is never silently dropped on a test
	// failure (matches the Radarr/Sonarr pattern). The frontend reads the
	// { ok, saved, testError } shape to decide what message to show.
	setConfig("jellyfin_url", url);
	setConfig("jellyfin_api_key", apiKey);
	setConfig("setup_complete", "1");

	const result = await testJellyfin({ url, apiKey });

	// Best-effort admin discovery only when the connection works; ignore failures.
	if (result.ok) {
		try {
			const users = await getUsers({ url, apiKey });
			const admin = users.find((u) => u.Name === "admin") ?? users[0];
			if (admin?.Id) setConfig("jellyfin_user_id", admin.Id);
		} catch {
			/* ignore */
		}
	}

	return c.json({ ok: result.ok, saved: true, testError: result.ok ? undefined : result.error });
});

// Persist values BEFORE testing the connection. The previous behaviour
// silently dropped what the user typed when the test failed (e.g. Sonarr
// not yet reachable), making the field appear to "forget" the input on
// reload. Save first, surface the test result as a warning the UI can show.
app.post("/radarr", async (c) => {
	const body = await c.req.json<{ url?: string; api_key?: string }>();
	const url = body.url?.replace(/\/$/, "");
	const apiKey = body.api_key;

	if (!url || !apiKey) {
		setConfig("radarr_enabled", "0");
		return c.json({ ok: false, error: "URL and API key are required" }, 400);
	}

	setConfig("radarr_url", url);
	setConfig("radarr_api_key", apiKey);
	setConfig("radarr_enabled", "1");

	const result = await testRadarr({ url, apiKey });
	return c.json({ ok: result.ok, saved: true, testError: result.ok ? undefined : result.error });
});

app.post("/sonarr", async (c) => {
	const body = await c.req.json<{ url?: string; api_key?: string }>();
	const url = body.url?.replace(/\/$/, "");
	const apiKey = body.api_key;

	if (!url || !apiKey) {
		setConfig("sonarr_enabled", "0");
		return c.json({ ok: false, error: "URL and API key are required" }, 400);
	}

	setConfig("sonarr_url", url);
	setConfig("sonarr_api_key", apiKey);
	setConfig("sonarr_enabled", "1");

	const result = await testSonarr({ url, apiKey });
	return c.json({ ok: result.ok, saved: true, testError: result.ok ? undefined : result.error });
});

app.post("/audio-languages", async (c) => {
	const body = await c.req.json<{ langs: string[] }>();
	setConfig("audio_languages", JSON.stringify(body.langs ?? []));
	return c.json({ ok: true });
});

app.get("/schedule", (c) => {
	return c.json(getScheduleConfig());
});

app.patch("/schedule", async (c) => {
	const body = await c.req.json<Partial<ScheduleConfig>>();
	try {
		updateScheduleConfig(body);
	} catch (e) {
		return c.json({ error: e instanceof Error ? e.message : String(e) }, 400);
	}
	return c.json(getScheduleConfig());
});

// ─── MQTT ────────────────────────────────────────────────────────────────────

app.post("/mqtt", async (c) => {
	const body = await c.req.json<{ url?: string; topic?: string; username?: string; password?: string }>();
	const url = (body.url ?? "").trim();
	const topic = (body.topic ?? "jellyfin/events").trim();
	const username = (body.username ?? "").trim();
	const password = body.password ?? "";

	setConfig("mqtt_url", url);
	setConfig("mqtt_topic", topic || "jellyfin/events");
	setConfig("mqtt_username", username);
	// Only overwrite password when a non-empty value is sent, so the UI can
	// leave the field blank to indicate "keep the existing one".
	if (password) setConfig("mqtt_password", password);

	// Reconnect with the new config. Best-effort; failures surface in status.
	startMqttClient().catch(() => {});

	return c.json({ ok: true, saved: true });
});

app.get("/mqtt/status", (c) => {
	return c.json(getMqttStatus());
});

app.post("/mqtt/test", async (c) => {
	const body = await c.req.json<{ url?: string; topic?: string; username?: string; password?: string }>();
	const url = (body.url ?? "").trim();
	if (!url) return c.json({ ok: false, error: "Broker URL required" }, 400);
	const topic = (body.topic ?? "jellyfin/events").trim() || "jellyfin/events";
	const password = body.password || getConfig("mqtt_password") || "";

	const result = await testMqttConnection({ url, topic, username: (body.username ?? "").trim(), password }, 15_000);
	return c.json(result);
});

/**
 * Returns whether Jellyfin has the Webhook plugin installed. The Settings
 * panel uses this to decide between "setup steps" vs "install this plugin".
 */
app.get("/jellyfin/webhook-plugin", async (c) => {
	const url = getConfig("jellyfin_url");
	const apiKey = getConfig("jellyfin_api_key");
	if (!url || !apiKey) return c.json({ ok: false, error: "Jellyfin not configured" }, 400);

	try {
		const res = await fetch(`${url}/Plugins`, { headers: { "X-Emby-Token": apiKey } });
		if (!res.ok) return c.json({ ok: false, error: `HTTP ${res.status}` }, 502);
		const plugins = (await res.json()) as { Name?: string; Id?: string; Version?: string }[];
		const hit = plugins.find((p) => typeof p.Name === "string" && p.Name.toLowerCase().includes("webhook"));
		return c.json({ ok: true, installed: !!hit, plugin: hit ?? null });
	} catch (err) {
		return c.json({ ok: false, error: String(err) }, 502);
	}
});

app.post("/clear-scan", (c) => {
	const db = getDb();
	// Delete children first to avoid slow cascade deletes
	db.transaction(() => {
		db.prepare("DELETE FROM stream_decisions").run();
		db.prepare("DELETE FROM jobs").run();
		db.prepare("DELETE FROM subtitle_files").run();
		db.prepare("DELETE FROM review_plans").run();
		db.prepare("DELETE FROM media_streams").run();
		db.prepare("DELETE FROM media_items").run();
		db.prepare("UPDATE config SET value = '0' WHERE key = 'scan_running'").run();
	})();
	return c.json({ ok: true });
});

/**
 * Full factory reset. Truncates every table including config, re-seeds the
 * defaults so the setup wizard reappears, and returns. Env-backed config
 * keys (JELLYFIN_URL, etc.) continue to resolve via getConfig's env fallback
 * — they don't live in the DB to begin with.
 */
app.post("/reset", (c) => {
	const db = getDb();
	db.transaction(() => {
		// Order matters when ON DELETE CASCADE isn't consistent across versions.
		db.prepare("DELETE FROM stream_decisions").run();
		db.prepare("DELETE FROM jobs").run();
		db.prepare("DELETE FROM subtitle_files").run();
		db.prepare("DELETE FROM review_plans").run();
		db.prepare("DELETE FROM media_streams").run();
		db.prepare("DELETE FROM media_items").run();
		db.prepare("DELETE FROM config").run();
	})();
	reseedDefaults();
	return c.json({ ok: true });
});

export default app;