#pragma once
#include <faset/authoring/schema.hpp>
#include <filesystem>
#include <map>
#include <mutex>
#include <string>
#include <vector>

namespace faset::authoring {
Json make_scene(std::string name,int dimension=3);
Json make_entity(const SchemaRegistry& schemas,std::string name,const std::string& parent="");
void validate_scene(const Json& scene,const SchemaRegistry& schemas);

class AuthoringService {
public:
    explicit AuthoringService(std::filesystem::path project_root,SchemaRegistry schemas=builtin_schemas());
    Json create(std::string name,int dimension=3);
    Json open(const std::filesystem::path& relative,bool recover=false);
    Json query(const std::string& document) const;
    Json documents() const;
    Json transact(const std::string& document,std::uint64_t expected_revision,const Json& operations,const std::string& idempotency_key="");
    Json undo(const std::string& document,std::uint64_t expected_revision);
    Json redo(const std::string& document,std::uint64_t expected_revision);
    Json save(const std::string& document,const std::filesystem::path& relative={});
    Json recovery_documents() const;
    const SchemaRegistry& schemas() const {return schemas_;}
    void register_schemas(const Json& manifest);
    const std::filesystem::path& root() const {return root_;}
private:
    struct State {
        Json data;
        std::uint64_t revision=0;
        std::filesystem::path path;
        std::string saved_hash,disk_hash;
        std::vector<Json> undo,redo;
        std::map<std::string,std::pair<std::string,Json>> requests;
    };
    Json summary(const State& state,bool include_data=true) const;
    State& state(const std::string& document);
    const State& state(const std::string& document) const;
    void journal(const State& state) const;
    void apply(Json& scene,const Json& operation);
    Json history(const std::string& document,std::uint64_t revision,bool redo);
    std::filesystem::path root_;
    SchemaRegistry schemas_;
    std::map<std::string,State> documents_;
    mutable std::recursive_mutex mutex_;
};
}