##############################################################################
### CORE FRAMEWORK SOURCE FILE                                             ###
### Copyright (c) 2024 The StarOpenSource Project & Contributors           ###
### Licensed under the GNU General Public License v3                       ###
###                                                                        ###
### This program is free software: you can redistribute it and/or modify   ###
### it under the terms of the GNU General Public License as published by   ###
### the Free Software Foundation, either version 3 of the License, or      ###
### (at your option) any later version.                                    ###
###                                                                        ###
### This program is distributed in the hope that it will be useful,        ###
### but WITHOUT ANY WARRANTY; without even the implied warranty of         ###
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          ###
### GNU General Public License for more details.                           ###
###                                                                        ###
### You should have received a copy of the GNU General Public License      ###
### along with this program.  If not, see <https://www.gnu.org/licenses/>. ###
##############################################################################
### src/logger.gd (Logger implementation)                                  ###
###                                                                        ###
### Prints formatted strings into the console/log.                         ###
##############################################################################
extends CoreBaseModule

# Signals
signal log_event

# Configuration
var config_level: CoreTypes.LoggerLevel
var config_colored: bool
var config_format: String
var config_newlines_override: bool
var config_newlines_sizelimit: int

# Update configuration
func _pull_config() -> void:
	config_level = core.config.logger_level
	config_colored = core.config.logger_colored
	config_format = core.config.logger_format
	config_newlines_override = core.config.logger_newlines_override
	config_newlines_sizelimit = core.config.logger_newlines_sizelimit

# Creates log messages
func _log(level: CoreTypes.LoggerLevel, message: String) -> void:
	var origin: Dictionary = get_origin()
	if !is_level_allowed(level):
		emit_signal("log_event", false, level, origin, message, "")
		return
	var format: String = config_format
	format = format.replace("%time_ms%", str(Time.get_ticks_msec()))
	format = format.replace("%time%", Time.get_time_string_from_system(true))
	format = format.replace("%source%", origin["source_clean"])
	format = format.replace("%source_raw%", origin["source"])
	format = format.replace("%function%", origin["function"])
	format = format.replace("%line%", str(origin["line"]))
	var format_newline: String = format.replace("%color%", "").replace("%message%", "")
	if !config_colored: format = format.replace("%color%", "")
	match(level):
		CoreTypes.LoggerLevel.DIAG:
			format = format.replace("%level%", "DIAG")
			format_newline = format_newline.replace("%level%", "DIAG")
			format.replace("%color%", "[color=dark_gray]")
		CoreTypes.LoggerLevel.VERB:
			format = format.replace("%level%", "VERB")
			format_newline = format_newline.replace("%level%", "VERB")
			format = format.replace("%color%", "[color=gray]")
		CoreTypes.LoggerLevel.INFO:
			format = format.replace("%level%", "INFO")
			format_newline = format_newline.replace("%level%", "INFO")
			format = format.replace("%color%", "[color=white]")
		CoreTypes.LoggerLevel.WARN:
			format = format.replace("%level%", "WARN")
			format_newline = format_newline.replace("%level%", "WARN")
			format = format.replace("%color%", "[color=yellow]")
		CoreTypes.LoggerLevel.ERROR:
			format = format.replace("%level%", "ERR!")
			format_newline = format_newline.replace("%level%", "ERR!")
			format = format.replace("%color%", "[color=red]")
		CoreTypes.LoggerLevel.NONE:
			format = format.replace("%level%", "NONE")
			format_newline = format_newline.replace("%level%", "NONE")
			format = format.replace("%color%", "[color=black]")
	# Replace %message%
	if config_newlines_override and config_newlines_sizelimit <= -1 or format_newline.length() <= config_newlines_sizelimit: message = message.replace("\n", "\n" + " ".repeat(format_newline.length()))
	format = format.replace("%message%", message)
	emit_signal("log_event", true, level, origin, message, format)
	if config_colored: print_rich(format)
	else: print(format)

# Get function caller
func get_origin() -> Dictionary:
	var stack: Dictionary = get_stack()[3]
	return { "source": stack["source"], "source_clean": stack["source"].replace("res://", "").replace("user://", ""), "function": stack["function"], "line": stack["line"] }

# Check if level is allowed
func is_level_allowed(level: CoreTypes.LoggerLevel) -> bool:
	if level <= config_level: return true
	else: return false

# Self explanitory
func diag(message: String) -> void: _log(CoreTypes.LoggerLevel.DIAG, message)
func verb(message: String) -> void: _log(CoreTypes.LoggerLevel.VERB, message)
func info(message: String) -> void: _log(CoreTypes.LoggerLevel.INFO, message)
func warn(message: String) -> void: _log(CoreTypes.LoggerLevel.WARN, message)
func error(message: String) -> void: _log(CoreTypes.LoggerLevel.ERROR, message)
func crash(_message: String) -> void:
	await get_tree().process_frame
	error("crash() isn't implemented yet")