#pragma once

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

#include "alvin/error.hpp"

namespace alvin {

struct Point {
    int x = 0;
    int y = 0;
    friend bool operator==(const Point&, const Point&) = default;
};

struct Size {
    int width = 0;
    int height = 0;
    friend bool operator==(const Size&, const Size&) = default;
};

// All rectangles are in global desktop coordinates (logical pixels, i.e. after
// monitor scaling) unless documented otherwise.
struct Rect {
    int x = 0;
    int y = 0;
    int width = 0;
    int height = 0;

    int right() const { return x + width; }
    int bottom() const { return y + height; }
    Point center() const { return {x + width / 2, y + height / 2}; }
    bool empty() const { return width <= 0 || height <= 0; }
    bool contains(Point p) const { return p.x >= x && p.y >= y && p.x < right() && p.y < bottom(); }

    // Smallest rect containing both. An empty rect acts as identity.
    Rect united(const Rect& o) const;

    friend bool operator==(const Rect&, const Rect&) = default;
};

struct Monitor {
    std::string name;       // connector name, e.g. "DP-1" or "\\\\.\\DISPLAY1"
    std::string description;
    Rect bounds;            // logical position/size in the global desktop
    Size pixelSize;         // physical mode size in pixels
    double scale = 1.0;
    bool primary = false;
};

// Enumerate monitors on the current session.
Result<std::vector<Monitor>> listMonitors();

// Bounding box of all monitors, i.e. the space absolute pointer motion maps onto.
Result<Rect> desktopBounds();

}  // namespace alvin