phase 1-6 implemented

apps/admin/src/lib/env.ts

@@ -0,0 +1,88 @@
+/**
+ * Environment variable validation for admin app
+ * Validates that all required environment variables are set
+ */
+
+interface RequiredEnvVars {
+  NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY: string;
+  CLERK_SECRET_KEY: string;
+  DEEPSEEK_API_KEY: string;
+}
+
+interface OptionalEnvVars {
+  CLERK_WEBHOOK_SECRET?: string;
+  DATABASE_PATH?: string;
+  NODE_ENV?: string;
+}
+
+type EnvVars = RequiredEnvVars & OptionalEnvVars;
+
+/**
+ * Validate required environment variables
+ * Throws error if any required variable is missing
+ */
+export function validateEnv(): EnvVars {
+  const errors: string[] = [];
+
+  // Required variables
+  const requiredVars = [
+    "NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY",
+    "CLERK_SECRET_KEY",
+    "DEEPSEEK_API_KEY",
+  ] as const;
+
+  for (const varName of requiredVars) {
+    if (!process.env[varName]) {
+      errors.push(`Missing required environment variable: ${varName}`);
+    }
+  }
+
+  if (errors.length > 0) {
+    const errorMessage = [
+      "❌ Environment validation failed:",
+      ...errors,
+      "",
+      "Please check your .env file and ensure all required variables are set.",
+      "See .env.example for the list of required variables.",
+    ].join("\n");
+
+    throw new Error(errorMessage);
+  }
+
+  return {
+    NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY:
+      process.env.NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY!,
+    CLERK_SECRET_KEY: process.env.CLERK_SECRET_KEY!,
+    DEEPSEEK_API_KEY: process.env.DEEPSEEK_API_KEY!,
+    CLERK_WEBHOOK_SECRET: process.env.CLERK_WEBHOOK_SECRET,
+    DATABASE_PATH: process.env.DATABASE_PATH || "./fitai.db",
+    NODE_ENV: process.env.NODE_ENV || "development",
+  };
+}
+
+/**
+ * Get validated environment variables
+ * Caches the result after first validation
+ */
+let cachedEnv: EnvVars | null = null;
+
+export function getEnv(): EnvVars {
+  if (!cachedEnv) {
+    cachedEnv = validateEnv();
+  }
+  return cachedEnv;
+}
+
+/**
+ * Check if running in development mode
+ */
+export function isDevelopment(): boolean {
+  return getEnv().NODE_ENV === "development";
+}
+
+/**
+ * Check if running in production mode
+ */
+export function isProduction(): boolean {
+  return getEnv().NODE_ENV === "production";
+}