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//
// Created by m on 7/27/17.
//
#include <algorithm>
#include "json_helper.hpp"
#include "layers.hpp"
#include "util.hpp"
namespace wm {
using json = nlohmann::json;
surface_id_to_layer::surface_id_to_layer(nlohmann::json const &j) {
// DB(j);
if (j["type"] == "range") {
this->id_min = get<int>(j["first_surface_id"]);
this->id_max = get<int>(j["last_surface_id"]);
} else {
this->id_min = this->id_max = get<int>(j["surface_id"]);
}
this->name = j["name"].get<std::string>();
this->layer_id = get<int>(j["layer_id"]);
}
struct result<struct surface_id_to_layer_map> to_surface_id_to_layer_map(
nlohmann::json const &j) {
DB(j);
try {
surface_id_to_layer_map stl{};
auto m = j["mappings"];
stl.layers.reserve(m.size());
std::transform(std::cbegin(m), std::cend(m),
std::inserter(stl.mapping, stl.mapping.end()),
[&stl](nlohmann::json const &j) {
auto k = surface_id_to_layer(j);
stl.layers.push_back(unsigned(k.layer_id));
return k;
});
// XXX need to sort layers?
for (auto i : stl.mapping) {
if (i.name.empty()) {
return Err<struct surface_id_to_layer_map>(
"Found mapping w/o name");
}
if (i.layer_id == -1 || i.id_min == -1 || i.id_max == -1) {
return Err<struct surface_id_to_layer_map>(
"Found invalid/unset IDs in mapping");
}
}
// Check lookup
auto jtests = j.value("tests", json());
if (!jtests.empty()) {
DB("Embedded tests...");
std::vector<std::pair<int, int>> tests;
tests.reserve(jtests.size());
std::transform(std::cbegin(jtests), std::cend(jtests),
std::back_inserter(tests), [](json const &j) {
return std::make_pair(
get<int>(j["surface_id"]),
get<int>(j["expect_layer_id"]));
});
for (auto sid : tests) {
int lid = stl.get_layer_for_surface(sid.first).value_or(-1);
DB("this=" << sid.first << ", that=" << lid
<< ", expect=" << sid.second);
if (lid != sid.second) {
return Err<surface_id_to_layer_map>(
"ID Map embedded test failed!");
}
}
}
return Ok(stl);
} catch (std::exception &e) {
return Err<struct surface_id_to_layer_map>(e.what());
}
}
// Helper to allow std::lower_bound with a int key only
inline bool
operator<(struct surface_id_to_layer const &a, int b) {
return a.id_max < b;
}
optional<int> surface_id_to_layer_map::get_layer_for_surface(int surface_id) {
auto i = std::lower_bound(std::cbegin(this->mapping),
std::cend(this->mapping), surface_id);
if (i != this->mapping.end()) {
// std::less only checks for surface_id_to_layer::id_max, so check
// that we are actually inside of an interval here.
if (i->id_min <= surface_id) {
return optional<int>(i->layer_id);
}
}
return nullopt;
}
} // namespace wm
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