#pragma once

#include <cstdint>
#include <string>
#include <utility>
#include <vector>

namespace fgc {

// One camera setting as the VimbaX Viewer exported it.
struct SettingEntry {
    std::string name;
    std::string value;
    std::string selector;  // "" unless the Viewer nested it in a <SelectorGroup>
};

// The settings a Viewer XML holds, in file order.
//
// These are NEVER applied: the program hands the XML itself to the Vimba X SDK,
// which is what guarantees the camera gets exactly the combination the GUI
// validated. This parse exists only to render a human-readable record and to
// diff one export against the previous one.
struct CameraSettings {
    std::string               model;    // <CameraInfo Model="...">
    std::string               device_id;
    std::vector<SettingEntry> entries;  // <RemoteDevice> features, in order
};

// Parse a VimbaX Viewer settings export. Only the <RemoteDevice> block is read:
// the <LocalDevice>/stream sections describe the host's transport layer, not the
// sensor. Throws std::runtime_error naming the problem if the file is missing or
// does not look like a Viewer export.
CameraSettings parseCameraSettingsXml(const std::string& path);

// Render the human-readable record written beside the XML. `xml_name` and
// `hash_label` go in the header so the file says what it came from.
std::string renderSettingsRecord(const CameraSettings& s, const std::string& xml_name,
                                 const std::string& hash_label);

// Read back a record written by renderSettingsRecord. Returns the recorded hash
// label (empty if the file is absent or has none) and the settings it listed, so
// a regeneration can report what actually changed.
struct SettingsRecord {
    std::string               hash_label;
    std::vector<SettingEntry> entries;
};
SettingsRecord readSettingsRecord(const std::string& path);

// Human-readable difference between two settings lists, one line per change:
//   "AcquisitionFrameRate  10 -> 8", "+ Gamma  1.2 (new)", "- Sharpness (removed)".
// Empty when they match.
std::vector<std::string> diffSettings(const std::vector<SettingEntry>& before,
                                      const std::vector<SettingEntry>& after);

}  // namespace fgc