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import { NextResponse } from "next/server";
import { exec } from "child_process";
import { promisify } from "util";
import fs from "fs/promises";
import path from "path";
import os from "os";
const execAsync = promisify(exec);
const getConfigDir = () => path.join(os.homedir(), ".config", "opencode");
const getConfigPath = () => path.join(getConfigDir(), "opencode.json");
// Check if opencode CLI is installed (via which/where or config file exists)
const checkOpenCodeInstalled = async () => {
try {
const isWindows = os.platform() === "win32";
const command = isWindows ? "where opencode" : "which opencode";
const env = isWindows
? { ...process.env, PATH: `${process.env.APPDATA}\\npm;${process.env.PATH}` }
: process.env;
await execAsync(command, { windowsHide: true, env });
return true;
} catch {
try {
await fs.access(getConfigPath());
return true;
} catch {
return false;
}
}
};
const readConfig = async () => {
try {
const content = await fs.readFile(getConfigPath(), "utf-8");
return JSON.parse(content);
} catch (error) {
if (error.code === "ENOENT") return null;
throw error;
}
};
const has9RouterConfig = (config) => {
if (!config?.provider) return false;
return !!config.provider["9router"];
};
// GET - Check opencode CLI and read current settings
export async function GET() {
try {
const isInstalled = await checkOpenCodeInstalled();
if (!isInstalled) {
return NextResponse.json({
installed: false,
config: null,
message: "OpenCode CLI is not installed",
});
}
const config = await readConfig();
const providerConfig = config?.provider?.["9router"];
const modelMap = providerConfig?.models || {};
return NextResponse.json({
installed: true,
config,
has9Router: has9RouterConfig(config),
configPath: getConfigPath(),
opencode: {
models: Object.keys(modelMap),
activeModel: config?.model?.startsWith("9router/") ? config.model.replace(/^9router\//, "") : null,
baseURL: providerConfig?.options?.baseURL || null,
},
});
} catch (error) {
console.log("Error checking opencode settings:", error);
return NextResponse.json({ error: "Failed to check opencode settings" }, { status: 500 });
}
}
// POST - Apply 9Router as openai-compatible provider (multi-model support)
export async function POST(request) {
try {
const { baseUrl, apiKey, model, models, activeModel, subagentModel } = await request.json();
// Accept either `model` (string, legacy) or `models` (array of strings)
const modelsArray = Array.isArray(models) ? models.slice() : (typeof model === "string" ? [model] : []);
if (!baseUrl || modelsArray.length === 0) {
return NextResponse.json({ error: "baseUrl and at least one model are required" }, { status: 400 });
}
const configDir = getConfigDir();
const configPath = getConfigPath();
await fs.mkdir(configDir, { recursive: true });
// Read existing config or start fresh
let config = {};
try {
const existing = await fs.readFile(configPath, "utf-8");
config = JSON.parse(existing);
} catch { /* No existing config */ }
const normalizedBaseUrl = baseUrl.endsWith("/v1") ? baseUrl : `${baseUrl}/v1`;
const keyToUse = apiKey || "sk_9router";
const effectiveSubagentModel = subagentModel || modelsArray[0];
// Ensure provider object
if (!config.provider) config.provider = {};
// Preserve any existing 9router provider entry and its models
const existingProvider = config.provider["9router"] || { npm: "@ai-sdk/openai-compatible", options: {}, models: {} };
// Merge options (overwrite baseURL/apiKey)
existingProvider.options = {
...existingProvider.options,
baseURL: normalizedBaseUrl,
apiKey: keyToUse,
};
// Ensure models map exists
existingProvider.models = existingProvider.models || {};
// Add or update entries for all requested models
for (const m of modelsArray) {
if (!m || typeof m !== "string") continue;
existingProvider.models[m] = { name: m, modalities: { input: ["text", "image"], output: ["text"] } };
}
// Save merged provider back
config.provider["9router"] = existingProvider;
// Set the active model: prefer explicit activeModel, else first of modelsArray
// If activeModel is explicitly empty string, clear the model
if (activeModel === "") {
config.model = "";
} else {
const finalActive = activeModel || modelsArray[0];
if (finalActive) {
config.model = `9router/${finalActive}`;
}
}
// Add subagent configuration
if (!config.agent) config.agent = {};
config.agent.explorer = {
description: "Fast explorer subagent for codebase exploration",
mode: "subagent",
model: `9router/${effectiveSubagentModel}`,
};
await fs.writeFile(configPath, JSON.stringify(config, null, 2));
return NextResponse.json({
success: true,
message: "OpenCode settings applied successfully!",
configPath,
});
} catch (error) {
console.log("Error applying opencode settings:", error);
return NextResponse.json({ error: "Failed to apply settings" }, { status: 500 });
}
}
// PATCH - Update specific settings (e.g., clear active model)
export async function PATCH(request) {
try {
const { clearActiveModel } = await request.json();
const configPath = getConfigPath();
let config = {};
try {
const existing = await fs.readFile(configPath, "utf-8");
config = JSON.parse(existing);
} catch (error) {
if (error.code === "ENOENT") {
return NextResponse.json({ success: true, message: "No config file found" });
}
throw error;
}
if (clearActiveModel === true) {
// Clear active model but keep models in the list
if (config.model?.startsWith("9router/")) {
config.model = "";
}
}
await fs.writeFile(configPath, JSON.stringify(config, null, 2));
return NextResponse.json({
success: true,
message: "Settings updated",
});
} catch (error) {
console.log("Error patching opencode settings:", error);
return NextResponse.json({ error: "Failed to patch settings" }, { status: 500 });
}
}
// DELETE - Remove 9Router provider or specific models from config
export async function DELETE(request) {
try {
const { searchParams } = new URL(request.url);
const modelToRemove = searchParams.get("model");
const configPath = getConfigPath();
let config = {};
try {
const existing = await fs.readFile(configPath, "utf-8");
config = JSON.parse(existing);
} catch (error) {
if (error.code === "ENOENT") {
return NextResponse.json({ success: true, message: "No config file to reset" });
}
throw error;
}
// If specific model provided, remove just that model
if (modelToRemove && config.provider?.["9router"]?.models) {
delete config.provider["9router"].models[modelToRemove];
// If no models left, remove the provider
if (Object.keys(config.provider["9router"].models).length === 0) {
delete config.provider["9router"];
if (config.model?.startsWith("9router/")) delete config.model;
} else if (config.model === `9router/${modelToRemove}`) {
// If removed model was active, switch to first remaining model
const remainingModels = Object.keys(config.provider["9router"].models);
config.model = `9router/${remainingModels[0]}`;
}
} else {
// No specific model - remove entire 9router provider
if (config.provider) delete config.provider["9router"];
if (config.model?.startsWith("9router/")) delete config.model;
}
// Remove subagent configuration
if (config.agent?.explorer?.model?.startsWith("9router/")) {
delete config.agent.explorer;
// Clean up empty agent object
if (Object.keys(config.agent).length === 0) delete config.agent;
}
await fs.writeFile(configPath, JSON.stringify(config, null, 2));
return NextResponse.json({
success: true,
message: modelToRemove ? `Model "${modelToRemove}" removed` : "9Router settings removed from OpenCode",
});
} catch (error) {
console.log("Error resetting opencode settings:", error);
return NextResponse.json({ error: "Failed to reset opencode settings" }, { status: 500 });
}
}
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