/*
Copyright © 2026 Craig Williams <craig@avsdev.uk>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package config

import (
	"errors"
	"log/slog"
	"reflect"
)

type JobSearchConfigLogging struct {
	Level string
	File  string
}

// Default configuration
func defaultConfigLogging() JobSearchConfigLogging {
	return JobSearchConfigLogging{
		Level: "warn",
	}
}

// Converts configuration to a map
func (conf JobSearchConfigLogging) Map() map[string]any {
	return map[string]any{
		"level": conf.Level,
		"file":  conf.File,
	}
}

// Converts configuration to a flat dotted format
func (conf JobSearchConfigLogging) Flatten() map[string]any {
	confMap := conf.Map()
	retMap := map[string]any{}
	for k, v := range confMap {
		retMap["logging."+k] = v
	}
	return retMap
}

// Returns the expected type of a configuration key value
func (c JobSearchConfigLogging) TypeOf(key string) (reflect.Kind, error) {
	switch key {
	case "level":
		return reflect.String, nil
	case "file":
		return reflect.String, nil
	default:
		return reflect.Invalid, errors.New("unknown configuration key")
	}
}

// Returns the value of a configuration key
func (c JobSearchConfigLogging) ValueOf(key string) (any, error) {
	switch key {
	case "level":
		return c.Level, nil
	case "file":
		return c.File, nil
	default:
		return "", errors.New("unknown configuration key")
	}
}

// Sets the value of a configuration key
func (c *JobSearchConfigLogging) SetValue(key string, value any) error {
	switch key {
	case "level":
		newLevel := value.(string)
		switch newLevel {
		case "debug", "info", "warn", "error":
			c.Level = value.(string)
		default:
			return errors.New(
				"invalid log level. Must be one of: debug, info, warn, error")
		}
	case "file":
		c.File = value.(string)
	default:
		return errors.New("unknown configuration key")
	}
	return nil
}

// Utility methods for converting level strings to slog levels
func ConfigLevelToLogLevel(level string) slog.Level {
	switch level {
	case "debug":
		return slog.LevelDebug
	case "info":
		return slog.LevelInfo
	case "warn":
		return slog.LevelWarn
	case "error":
		return slog.LevelError
	default:
		return 99
	}
}
func (c *JobSearchConfigLogging) LogLevel() slog.Level {
	return ConfigLevelToLogLevel(c.Level)
}