package flag

import (
	"fmt"
	"gitea.illuad.fr/adrien/middleman"
	"github.com/rs/zerolog"
	"github.com/urfave/cli/v3"
)

const (
	LogFormatFlagName = "log-format"
	LogLevelFlagName  = "log-level"
)

const (
	defaultLogFormat = "json"
	defaultLogLevel  = zerolog.ErrorLevel
)

// ErrInvalidLogLevel is returned if the given log level is invalid.
type ErrInvalidLogLevel struct {
	LogLevel string
}

func (e ErrInvalidLogLevel) Error() string {
	return fmt.Sprintf("%s: invalid log level, see help", e.LogLevel)
}

func LogFormat(parent string) cli.Flag {
	return &cli.StringFlag{
		Name:     LogFormatFlagName,
		Category: "log",
		Usage:    "log format (hf, json)",
		Sources:  middleman.PluckEnvVar("MIDDLEMAN", LogFormatFlagName),
		Value:    defaultLogFormat,
		Aliases:  middleman.PluckAlias(parent, LogFormatFlagName),
	}
}

func LogLevel(parent string) cli.Flag {
	return &cli.StringFlag{
		Name:     LogLevelFlagName,
		Category: "log",
		Usage:    "log level (trace, debug, info, warn, error, fatal, panic)",
		Sources:  middleman.PluckEnvVar("MIDDLEMAN", LogLevelFlagName),
		Value:    defaultLogLevel.String(),
		Aliases:  middleman.PluckAlias(parent, LogLevelFlagName),
	}
}