#ifndef __I_CLOUD_SERVICE_AGENT_HPP__
#define __I_CLOUD_SERVICE_AGENT_HPP__

#include "bambu_networking.hpp"
#include "../../libslic3r/ProjectTask.hpp"
#include <string>
#include <map>
#include <vector>
#include <functional>
#include <memory>

namespace Slic3r {

/**
 * ICloudServiceAgent - Interface for authentication and cloud service operations.
 *
 * This interface encapsulates all cloud-related functionality including authentication:
 * - Lifecycle methods for agent initialization
 * - User session management (login/logout)
 * - Token access for dependent agents (IPrinterAgent)
 * - Login UI command builders for WebView integration
 * - Server connectivity and subscription management
 * - Settings synchronization (presets upload/download)
 * - Cloud user services (messages, tasks, firmware)
 * - Model mall and publishing
 * - Analytics and telemetry
 * - Ratings and reviews
 *
 * Implementations:
 * - OrcaCloudServiceAgent: Native implementation for Orca Cloud (includes OAuth PKCE)
 * - BBLCloudServiceAgent: Wrapper around Bambu Lab's proprietary DLL
 *
 * Token Sharing Pattern:
 * IPrinterAgent receives an ICloudServiceAgent instance via set_cloud_agent() to
 * access tokens for cloud-relay operations without coupling to a specific auth
 * implementation.
 */
class ICloudServiceAgent {
public:
    virtual ~ICloudServiceAgent() = default;

    // ========================================================================
    // Lifecycle Methods
    // ========================================================================
    /**
     * Initialize the logging backend for the agent.
     * Call after set_config_dir() so logs have a destination.
     */
    virtual int init_log() = 0;

    /**
     * Provide the writable configuration directory for storing auth state.
     * Must be called before start().
     */
    virtual int set_config_dir(std::string config_dir) = 0;

    /**
     * Register the client certificate file for TLS authentication.
     * May be unused by some implementations (e.g., OrcaCloudServiceAgent).
     */
    virtual int set_cert_file(std::string folder, std::string filename) = 0;

    /**
     * Set the country code for region-specific backend selection.
     */
    virtual int set_country_code(std::string country_code) = 0;

    /**
     * Start the agent, performing any expensive initialization.
     * Typically regenerates PKCE bundles and attempts silent sign-in.
     */
    virtual int start() = 0;

    // ========================================================================
    // User Session Management
    // ========================================================================
    /**
     * Authenticate the user with the provided JSON payload.
     *
     * Supported formats:
     * 1. Traditional: {"username": "...", "password": "..."}
     * 2. WebView/OAuth: {"command": "user_login", "data": {...}}
     * 3. Token format: {"data": {"token": "...", "refresh_token": "...", "user": {...}}}
     *
     * On completion, invokes the registered OnUserLoginFn callback.
     */
    virtual int change_user(std::string user_info) = 0;

    /**
     * Check whether a valid authenticated session exists.
     */
    virtual bool is_user_login() = 0;

    /**
     * Terminate the current session.
     * @param request If true, also notify the backend to invalidate the session.
     */
    virtual int user_logout(bool request = false) = 0;

    /**
     * Return the backend-generated user ID for the current session.
     */
    virtual std::string get_user_id() = 0;

    /**
     * Return the display name for the current user.
     */
    virtual std::string get_user_name() = 0;

    /**
     * Return the avatar URL/path for the current user.
     */
    virtual std::string get_user_avatar() = 0;

    /**
     * Return the nickname for the current user.
     */
    virtual std::string get_user_nickname() = 0;

    // ========================================================================
    // Login UI Support
    // ========================================================================
    /**
     * Build a JSON command for the WebView login flow.
     * Contains backend URL, API key, and PKCE parameters.
     */
    virtual std::string build_login_cmd() = 0;

    /**
     * Build a JSON command for WebView logout.
     */
    virtual std::string build_logout_cmd() = 0;

    /**
     * Return a JSON snapshot of the active session (user info, no tokens).
     * Used by WebView to display current user state.
     */
    virtual std::string build_login_info() = 0;

    // ========================================================================
    // Token Access (for dependent agents)
    // ========================================================================
    /**
     * Return the current access token for API calls.
     * Cloud and printer agents use this for Authorization headers.
     */
    virtual std::string get_access_token() const = 0;

    /**
     * Return the current refresh token (if available).
     */
    virtual std::string get_refresh_token() const = 0;

    /**
     * Ensure the access token is fresh, refreshing if necessary.
     * Call before making API requests to avoid 401 errors.
     *
     * @param reason Descriptive string for logging (e.g., "connect_server")
     * @return true if the token is fresh or was successfully refreshed
     */
    virtual bool ensure_token_fresh(const std::string& reason) = 0;

    // ========================================================================
    // Server Connectivity
    // ========================================================================
    /**
     * Return the base hostname for cloud API calls (varies by region).
     * Helpful for diagnostics and when building browser URLs.
     */
    virtual std::string get_cloud_service_host() = 0;

    /**
     * Return the login URL for the cloud service.
     * @param language Optional language code (e.g., "en-US", "zh-CN") for localized login page.
     *                 If empty, returns the default (non-localized) login URL.
     * @return The full URL to the login page, or a local file:// URL for native implementations.
     */
    virtual std::string get_cloud_login_url(const std::string& language = "") = 0;

    /**
     * Perform a health check against the configured backend.
     * Updates is_server_connected() state and triggers OnServerConnectedFn.
     */
    virtual int connect_server() = 0;

    /**
     * Return whether the server is currently reachable.
     */
    virtual bool is_server_connected() = 0;

    /**
     * Force a server state recheck, clearing any cached state.
     */
    virtual int refresh_connection() = 0;

    /**
     * Subscribe to a logical module (e.g., "printer", "user").
     */
    virtual int start_subscribe(std::string module) = 0;

    /**
     * Stop listening to a formerly subscribed module.
     */
    virtual int stop_subscribe(std::string module) = 0;

    /**
     * Subscribe to push streams for specific device identifiers.
     */
    virtual int add_subscribe(std::vector<std::string> dev_list) = 0;

    /**
     * Remove device-level subscriptions.
     */
    virtual int del_subscribe(std::vector<std::string> dev_list) = 0;

    /**
     * Enable or disable multi-machine mode.
     */
    virtual void enable_multi_machine(bool enable) = 0;

    // ========================================================================
    // Settings Synchronization
    // ========================================================================
    /**
     * Fetch all presets owned by the logged-in user.
     * @param user_presets Map populated with [type][setting_id] = json
     */
    virtual int get_user_presets(std::map<std::string, std::map<std::string, std::string>>* user_presets) = 0;

    /**
     * Request a new preset identifier from the server.
     */
    virtual std::string request_setting_id(std::string name, std::map<std::string, std::string>* values_map, unsigned int* http_code) = 0;

    /**
     * Update or create a preset with a known setting_id.
     */
    virtual int put_setting(std::string setting_id, std::string name, std::map<std::string, std::string>* values_map, unsigned int* http_code) = 0;

    /**
     * Trigger bulk download of user presets.
     */
    virtual int get_setting_list(std::string bundle_version, ProgressFn pro_fn = nullptr, WasCancelledFn cancel_fn = nullptr) = 0;

    /**
     * Enhanced preset sync with per-item validation.
     */
    virtual int get_setting_list2(std::string bundle_version, CheckFn chk_fn, ProgressFn pro_fn = nullptr, WasCancelledFn cancel_fn = nullptr) = 0;

    /**
     * Delete a remote preset.
     */
    virtual int delete_setting(std::string setting_id) = 0;

    // ========================================================================
    // Cloud User Services
    // ========================================================================
    /**
     * Retrieve inbox/notification messages.
     */
    virtual int get_my_message(int type, int after, int limit, unsigned int* http_code, std::string* http_body) = 0;

    /**
     * Check for pending task reports.
     */
    virtual int check_user_task_report(int* task_id, bool* printable) = 0;

    /**
     * Fetch aggregated print statistics.
     */
    virtual int get_user_print_info(unsigned int* http_code, std::string* http_body) = 0;

    /**
     * Query user's tasks/prints.
     */
    virtual int get_user_tasks(TaskQueryParams params, std::string* http_body) = 0;

    /**
     * Fetch firmware information for a printer.
     */
    virtual int get_printer_firmware(std::string dev_id, unsigned* http_code, std::string* http_body) = 0;

    /**
     * Get plate index for a cloud task.
     */
    virtual int get_task_plate_index(std::string task_id, int* plate_index) = 0;

    /**
     * Retrieve extended user profile info.
     */
    virtual int get_user_info(int* identifier) = 0;

    /**
     * Fetch subtask information.
     */
    virtual int get_subtask_info(std::string subtask_id, std::string* task_json, unsigned int* http_code, std::string* http_body) = 0;

    /**
     * Retrieve slicing job info.
     */
    virtual int get_slice_info(std::string project_id, std::string profile_id, int plate_index, std::string* slice_json) = 0;

    /**
     * Query binding status for multiple devices.
     */
    virtual int query_bind_status(std::vector<std::string> query_list, unsigned int* http_code, std::string* http_body) = 0;

    /**
     * Update printer name in cloud profile.
     */
    virtual int modify_printer_name(std::string dev_id, std::string dev_name) = 0;

    // ========================================================================
    // Model Mall & Publishing
    // ========================================================================
    /**
     * Request live camera streaming URL.
     */
    virtual int get_camera_url(std::string dev_id, std::function<void(std::string)> callback) = 0;

    /**
     * Fetch staff-picked designs from model mall.
     */
    virtual int get_design_staffpick(int offset, int limit, std::function<void(std::string)> callback) = 0;

    /**
     * Run multi-stage publishing workflow.
     */
    virtual int start_publish(PublishParams params, OnUpdateStatusFn update_fn, WasCancelledFn cancel_fn, std::string* out) = 0;

    /**
     * Get model publish URL.
     */
    virtual int get_model_publish_url(std::string* url) = 0;

    /**
     * Fetch publishing subtask information.
     */
    virtual int get_subtask(BBLModelTask* task, OnGetSubTaskFn getsub_fn) = 0;

    /**
     * Get model mall home URL.
     */
    virtual int get_model_mall_home_url(std::string* url) = 0;

    /**
     * Build model detail page URL.
     */
    virtual int get_model_mall_detail_url(std::string* url, std::string id) = 0;

    /**
     * Retrieve user's model mall profile.
     */
    virtual int get_my_token(std::string ticket, unsigned int* http_code, std::string* http_body) = 0;
    virtual int get_my_profile(std::string token, unsigned int* http_code, std::string* http_body) = 0;

    // ========================================================================
    // Analytics & Tracking
    // ========================================================================
    /**
     * Enable/disable telemetry.
     */
    virtual int track_enable(bool enable) = 0;

    /**
     * Delete telemetry files.
     */
    virtual int track_remove_files() = 0;

    /**
     * Report a custom analytics event.
     */
    virtual int track_event(std::string evt_key, std::string content) = 0;

    /**
     * Set telemetry headers.
     */
    virtual int track_header(std::string header) = 0;

    /**
     * Update a tracked user property.
     */
    virtual int track_update_property(std::string name, std::string value, std::string type = "string") = 0;

    /**
     * Read a tracked user property.
     */
    virtual int track_get_property(std::string name, std::string& value, std::string type = "string") = 0;

    /**
     * Check if tracking is enabled.
     */
    virtual bool get_track_enable() = 0;

    // ========================================================================
    // Ratings & Reviews
    // ========================================================================
    /**
     * Submit a review for a marketplace design.
     */
    virtual int put_model_mall_rating(int design_id, int score, std::string content, std::vector<std::string> images, unsigned int& http_code, std::string& http_error) = 0;

    /**
     * Get OSS configuration for image uploads.
     */
    virtual int get_oss_config(std::string& config, std::string country_code, unsigned int& http_code, std::string& http_error) = 0;

    /**
     * Upload rating images to OSS.
     */
    virtual int put_rating_picture_oss(std::string& config, std::string& pic_oss_path, std::string model_id, int profile_id, unsigned int& http_code, std::string& http_error) = 0;

    /**
     * Poll for rating result.
     */
    virtual int get_model_mall_rating_result(int job_id, std::string& rating_result, unsigned int& http_code, std::string& http_error) = 0;

    // ========================================================================
    // Extra Features
    // ========================================================================
    /**
     * Set additional HTTP headers for all requests.
     */
    virtual int set_extra_http_header(std::map<std::string, std::string> extra_headers) = 0;

    /**
     * Get the studio info URL.
     */
    virtual std::string get_studio_info_url() = 0;

    /**
     * Fetch MakerWorld user preferences.
     */
    virtual int get_mw_user_preference(std::function<void(std::string)> callback) = 0;

    /**
     * Retrieve MakerWorld "For You" list.
     */
    virtual int get_mw_user_4ulist(int seed, int limit, std::function<void(std::string)> callback) = 0;

    /**
     * Return the version of the cloud service implementation.
     */
    virtual std::string get_version() = 0;

    // ========================================================================
    // Callback Registration
    // ========================================================================
    /**
     * Register the login status callback.
     * Called after change_user() finishes or when the session expires.
     */
    virtual int set_on_user_login_fn(OnUserLoginFn fn) = 0;

    /**
     * Register server connection status callback.
     */
    virtual int set_on_server_connected_fn(OnServerConnectedFn fn) = 0;

    /**
     * Register HTTP error callback.
     */
    virtual int set_on_http_error_fn(OnHttpErrorFn fn) = 0;

    /**
     * Provide country code getter callback.
     */
    virtual int set_get_country_code_fn(GetCountryCodeFn fn) = 0;

    /**
     * Provide main thread queue callback.
     */
    virtual int set_queue_on_main_fn(QueueOnMainFn fn) = 0;
};

} // namespace Slic3r

#endif // __I_CLOUD_SERVICE_AGENT_HPP__