import type { CodexConversionConfig } from "../adapter/activation/config.ts";
import { getCodexConversionConfigPath } from "../adapter/activation/config-store.ts";
import type { CodexVoiceMode } from "./ui.ts";

export function formatVoiceAudioError(error: Error, mode: CodexVoiceMode, config: CodexConversionConfig): string {
	const direction = audioErrorDirection(error.message, mode);
	if (!direction) return error.message;
	const input = direction === "input";
	const setting = input ? "voice.inputDevice" : "voice.outputDevice";
	const device = input ? config.voice.inputDevice : config.voice.outputDevice;
	return [
		`Codex voice could not open ${direction} device \`${device ?? "default"}\`.`,
		"It may be busy, unavailable, or the wrong endpoint in a routed or processed audio setup.",
		"Ask your Pi agent to resolve the audio setup, or paste this message into the prompt.",
		`Agent: inspect the available audio devices and routes. Remove \`${setting}\` in \`${getCodexConversionConfigPath()}\` to use the system default, or set an exact device id. For shared or processed audio, prefer the final virtual/system source rather than opening physical hardware directly. Then ask the user to try using voice features again.`,
		`Audio backend: ${error.message}`,
	].join("\n");
}

function audioErrorDirection(message: string, mode: CodexVoiceMode): "input" | "output" | undefined {
	const normalized = message.toLowerCase();
	if (/microphone|default input|input (?:device|stream|format)/.test(normalized)) return "input";
	if (/speaker|default output|output (?:device|stream|format)/.test(normalized)) return "output";
	if (mode === "dictation" && /(?:requested )?device|audio (?:device|stream)|capture stream|sample format/.test(normalized)) return "input";
	return undefined;
}

export function buildVoiceSetupInstructions(options: {
	config: CodexConversionConfig;
	configPath: string;
	helperPath: string | undefined;
	retryCommand: string;
}): string {
	const lines = [
		"Codex voice audio setup was requested.",
		`Config file: ${options.configPath}`,
		`Current input: ${options.config.voice.inputDevice ?? "system default"}`,
		`Current output: ${options.config.voice.outputDevice ?? "system default"}`,
	];
	if (!options.helperPath) {
		return [
			...lines,
			`No pi-codex-voice helper is available for ${process.platform}-${process.arch}. Build it locally, set tools.customRustBinariesDir in ${options.configPath}, then run /reload.`,
		].join("\n");
	}
	return [
		...lines,
		`Audio helper: ${options.helperPath}`,
		'Use its {"type":"list_devices"} JSONL command to inspect available devices.',
		"Ask whether the user wants each system default or an exact pinned device; do not guess. Omit inputDevice or outputDevice to follow that system default, or set its exact device id to pin it.",
		"Set voice.audioSetupCompleted to true and preserve every other config value.",
		`After saving, tell the user to run ${options.retryCommand}.`,
	].join("\n");
}

export function formatVoiceShortcut(value: string): string {
	return value.split("+").map((part) => part === "ctrl" ? "Ctrl" : part === "alt" ? "Alt" : part === "shift" ? "Shift" : part === "space" ? "Space" : part.toUpperCase()).join("+");
}