import Foundation

public struct SyntheticSettingsReader: Sendable {
    public static let apiKeyKey = "SYNTHETIC_API_KEY"

    public static func apiKey(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        if let token = self.cleaned(environment[apiKeyKey]) { return token }
        return nil
    }

    static func cleaned(_ raw: String?) -> String? {
        guard var value = raw?.trimmingCharacters(in: .whitespacesAndNewlines), !value.isEmpty else {
            return nil
        }

        if (value.hasPrefix("\"") && value.hasSuffix("\"")) ||
            (value.hasPrefix("'") && value.hasSuffix("'"))
        {
            value = String(value.dropFirst().dropLast())
        }

        value = value.trimmingCharacters(in: .whitespacesAndNewlines)
        return value.isEmpty ? nil : value
    }
}

public enum SyntheticSettingsError: LocalizedError, Sendable {
    case missingToken

    public var errorDescription: String? {
        switch self {
        case .missingToken:
            "Synthetic API key not found. Set apiKey in ~/.codexbar/config.json or SYNTHETIC_API_KEY."
        }
    }
}
