//===----------------------------------------------------------------------===//
//                         DuckDB
//
// duckdb/logging/log_storage.hpp
//
//
//===----------------------------------------------------------------------===//

#pragma once

#include "duckdb/logging/logger.hpp"
#include "duckdb/common/types/timestamp.hpp"
#include "duckdb/common/case_insensitive_map.hpp"

namespace duckdb {

// Holds global logging state
// - Handles configuration changes
// - Creates Loggers with cached configuration
// - Main sink for logs (either by logging directly into this, or by syncing a pre-cached set of log entries)
// - Holds the log storage
class LogManager : public enable_shared_from_this<LogManager> {
	friend class ThreadSafeLogger;
	friend class ThreadLocalLogger;
	friend class MutableLogger;

public:
	// Note: two step initialization because Logger needs shared pointer to log manager TODO: can we clean up?
	explicit LogManager(DatabaseInstance &db, LogConfig config = LogConfig());
	~LogManager();
	void Initialize();

	DUCKDB_API static LogManager &Get(ClientContext &context);
	unique_ptr<Logger> CreateLogger(LoggingContext context, bool thread_safe = true, bool mutable_settings = false);

	RegisteredLoggingContext RegisterLoggingContext(LoggingContext &context);

	DUCKDB_API bool RegisterLogStorage(const string &name, shared_ptr<LogStorage> &storage);

	//! The global logger can be used whe
	DUCKDB_API Logger &GlobalLogger();

	//! Flush everything
	DUCKDB_API void Flush();

	//! Get a shared_ptr to the log storage (For example, to scan it)
	DUCKDB_API shared_ptr<LogStorage> GetLogStorage();
	DUCKDB_API bool CanScan();

	DUCKDB_API void SetEnableLogging(bool enable);
	DUCKDB_API void SetLogMode(LogMode mode);
	DUCKDB_API void SetLogLevel(LogLevel level);
	DUCKDB_API void SetEnabledLogTypes(unordered_set<string> &enabled_log_types);
	DUCKDB_API void SetDisabledLogTypes(unordered_set<string> &disabled_log_types);
	DUCKDB_API void SetLogStorage(DatabaseInstance &db, const string &storage_name);

	DUCKDB_API LogConfig GetConfig();

protected:
	RegisteredLoggingContext RegisterLoggingContextInternal(LoggingContext &context);

	// This is to be called by the Loggers only, it does not verify log_level and log_type
	void WriteLogEntry(timestamp_t, const char *log_type, LogLevel log_level, const char *log_message,
	                   const RegisteredLoggingContext &context);
	// This allows efficiently pushing a cached set of log entries into the log manager
	void FlushCachedLogEntries(DataChunk &chunk, const RegisteredLoggingContext &context);

	mutex lock;
	LogConfig config;

	unique_ptr<Logger> global_logger;

	shared_ptr<LogStorage> log_storage;

	idx_t next_registered_logging_context_index = 0;

	// Any additional LogStorages registered (by extensions for example)
	case_insensitive_map_t<shared_ptr<LogStorage>> registered_log_storages;
};

} // namespace duckdb
