import { Hono } from "hono";
import { getAllConfig, getConfig, getDb, getEnvLockedKeys, reseedDefaults, setConfig } from "../db/index";
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();

// Config keys that hold credentials. `GET /` returns these as "***" when set,
// "" when unset. Real values only reach the client via the explicit
// GET /reveal?key=<key> endpoint (eye-icon toggle in the settings UI).
const SECRET_KEYS = new Set(["radarr_api_key", "sonarr_api_key"]);

app.get("/", (c) => {
	const config = getAllConfig();
	for (const key of SECRET_KEYS) {
		if (config[key]) config[key] = "***";
	}
	const envLocked = Array.from(getEnvLockedKeys());
	return c.json({ config, envLocked });
});

app.get("/reveal", (c) => {
	const key = c.req.query("key") ?? "";
	if (!SECRET_KEYS.has(key)) return c.json({ error: "not a secret key" }, 400);
	return c.json({ value: getConfig(key) ?? "" });
});

// The UI sends "***" as a sentinel meaning "user didn't touch this field,
// keep the stored value". Save endpoints call this before writing a secret.
function resolveSecret(incoming: string | undefined, storedKey: string): string {
	if (incoming === "***") return getConfig(storedKey) ?? "";
	return incoming ?? "";
}

// 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 = resolveSecret(body.api_key, "radarr_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 = resolveSecret(body.api_key, "sonarr_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 });
});

// Toggle the auto-processing flag. When flipped on, trigger a one-shot
// sort-inbox pass so existing Inbox items drain immediately without waiting
// for the next scan.
app.post("/auto-processing", async (c) => {
	const body = await c.req.json<{ enabled?: unknown }>().catch(() => ({ enabled: null }));
	if (typeof body.enabled !== "boolean") {
		return c.json({ ok: false, error: "enabled must be a boolean" }, 400);
	}
	setConfig("auto_processing", body.enabled ? "1" : "0");

	if (body.enabled) {
		const { processInbox, getAudioLanguages } = await import("./review");
		const { emitInboxSorted, emitInboxSortStart, emitInboxSortProgress } = await import("./execute");
		processInbox(getDb(), getAudioLanguages(), undefined, {
			onStart: emitInboxSortStart,
			onProgress: emitInboxSortProgress,
		})
			.then((result) => emitInboxSorted(result))
			.catch(() => emitInboxSorted({ moved_to_queue: 0, moved_to_review: 0 }));
	}
	return c.json({ ok: true, enabled: body.enabled });
});

// Toggle the auto-process-queue flag. When flipped on, kick the queue
// processor so any already-pending jobs start draining immediately without
// waiting for the next approval to trigger it.
app.post("/auto-process-queue", async (c) => {
	const body = await c.req.json<{ enabled?: unknown }>().catch(() => ({ enabled: null }));
	if (typeof body.enabled !== "boolean") {
		return c.json({ ok: false, error: "enabled must be a boolean" }, 400);
	}
	setConfig("auto_process_queue", body.enabled ? "1" : "0");

	if (body.enabled) {
		const { maybeStartQueueProcessor } = await import("./execute");
		const started = maybeStartQueueProcessor();
		return c.json({ ok: true, enabled: true, started });
	}
	return c.json({ ok: true, enabled: false });
});

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());
});

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 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 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 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;