// ============================================================================
// 045 — Input Validation
// ============================================================================
// Validates input data and returns appropriate error responses.
//
// Run:   soma run 045_validation.cell run
// Expect:
//   Valid input: {"ok": true, "name": "Alice", "age": 25}
//   Empty name: {"error": "name is required"}
//   Bad age: {"error": "age must be between 0 and 150"}

cell Validation {

    on run() {
        // Test valid input
        let r1 = validate("Alice", 25)
        print("Valid input: {r1}")

        // Test empty name
        let r2 = validate("", 25)
        print("Empty name: {r2}")

        // Test invalid age
        let r3 = validate("Bob", -5)
        print("Bad age: {r3}")

        return "done"
    }

    on validate(name: String, age: Int) {
        // Check name is not empty
        if name == "" {
            return map("error", "name is required")
        }

        // Check name length
        let name_len = len(name)
        if name_len > 100 {
            return map("error", "name too long")
        }

        // Check age range
        if age < 0 {
            return map("error", "age must be between 0 and 150")
        }
        if age > 150 {
            return map("error", "age must be between 0 and 150")
        }

        return map("ok", true, "name", name, "age", age)
    }
}