#ifndef HTTP_CLIENT_H
#define HTTP_CLIENT_H

#include <string>
#include <vector>
#include <map>

/**
 * @brief HTTP client for communicating with WizardMerge backend
 */
class HttpClient {
public:
    /**
     * @brief Construct HTTP client with backend URL
     * @param backendUrl URL of the backend server (e.g., "http://localhost:8080")
     */
    explicit HttpClient(const std::string& backendUrl);

    /**
     * @brief Perform a three-way merge via backend API
     * @param base Base version lines
     * @param ours Our version lines
     * @param theirs Their version lines
     * @param merged Output merged lines
     * @param hasConflicts Output whether conflicts were detected
     * @return true if successful, false on error
     */
    bool performMerge(
        const std::vector<std::string>& base,
        const std::vector<std::string>& ours,
        const std::vector<std::string>& theirs,
        std::vector<std::string>& merged,
        bool& hasConflicts
    );

    /**
     * @brief Check if backend is reachable
     * @return true if backend responds, false otherwise
     */
    bool checkBackend();

    /**
     * @brief Get last error message
     * @return Error message string
     */
    std::string getLastError() const { return lastError_; }

private:
    std::string backendUrl_;
    std::string lastError_;

    /**
     * @brief Perform HTTP POST request
     * @param endpoint API endpoint (e.g., "/api/merge")
     * @param jsonBody JSON request body
     * @param response Output response string
     * @return true if successful, false on error
     */
    bool post(const std::string& endpoint, const std::string& jsonBody, std::string& response);
};

#endif // HTTP_CLIENT_H