// MIT License
//
// Copyright (c) 2024 vinchent <vinchent@vinchent.xyz>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package log

import (
	"os"
	"sync"

	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/core"
	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/middleware"
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
)

type Logger interface {
	FatalLog(msg string, keyValues ...interface{})
	PanicLog(msg string, keyValues ...interface{})
	ErrorLog(msg string, keyValues ...interface{})
	WarnLog(msg string, keyValues ...interface{})
	InfoLog(msg string, keyValues ...interface{})
	DebugLog(msg string, keyValues ...interface{})
	Sync()
}

// zapLogger is an implementation of Logger interface
type zapLogger struct {
	z *zap.Logger
}

var (
	mu sync.Mutex

	// default global logger
	std = NewLogger(NewOptions())
)

// Init initializes global logger with options
func Init(opts *Options) {
	mu.Lock()
	defer mu.Unlock()

	std = NewLogger(opts)
}

func NewLogger(opts *Options) *zapLogger {
	if opts == nil {
		opts = NewOptions()
	}

	var zapLevel zapcore.Level
	// If unknown level, use info
	if err := zapLevel.UnmarshalText([]byte(opts.Level)); err != nil {
		zapLevel = zap.InfoLevel
	}

	encoderCfg := zap.NewProductionEncoderConfig()
	encoderCfg.TimeKey = "timestamp"
	encoderCfg.MessageKey = "message"
	encoderCfg.EncodeTime = zapcore.ISO8601TimeEncoder

	config := zap.Config{
		Level:             zap.NewAtomicLevelAt(zapLevel),
		Development:       opts.Development,
		DisableCaller:     opts.DisableCaller,
		DisableStacktrace: opts.DisableStacktrace,
		Sampling:          nil,
		Encoding:          opts.Format,
		EncoderConfig:     encoderCfg,
		OutputPaths:       opts.OutputPaths,
		ErrorOutputPaths: []string{
			"stderr",
		},
		InitialFields: map[string]interface{}{
			"pid": os.Getpid(),
		},
	}

	z := zap.Must(config.Build(zap.AddStacktrace(zapcore.PanicLevel), zap.AddCallerSkip(1)))

	zap.RedirectStdLog(z)

	return &zapLogger{z: z}
}

// CtxLog writes context's information into the log
func CtxLog(ctx core.Context) *zapLogger {
	return std.CtxLog(ctx)
}

func (z *zapLogger) CtxLog(ctx core.Context) *zapLogger {
	zz := z.clone()

	if rid := ctx.GetHeader(middleware.XRequestID); rid != "" {
		zz.z = zz.z.With(zap.Any(middleware.XRequestID, rid))
	}

	return zz
}

func (z *zapLogger) clone() *zapLogger {
	zz := *z
	return &zz
}

func (z *zapLogger) FatalLog(msg string, keyValues ...interface{}) {
	z.z.Sugar().Fatalw(msg, keyValues...)
}

func (z *zapLogger) PanicLog(msg string, keyValues ...interface{}) {
	z.z.Sugar().Panicw(msg, keyValues...)
}

func (z *zapLogger) ErrorLog(msg string, keyValues ...interface{}) {
	z.z.Sugar().Errorw(msg, keyValues...)
}

func (z *zapLogger) WarnLog(msg string, keyValues ...interface{}) {
	z.z.Sugar().Warnw(msg, keyValues...)
}

func (z *zapLogger) InfoLog(msg string, keyValues ...interface{}) {
	z.z.Sugar().Infow(msg, keyValues...)
}

func (z *zapLogger) DebugLog(msg string, keyValues ...interface{}) {
	z.z.Sugar().Debugw(msg, keyValues...)
}

func (z *zapLogger) Sync() {
	_ = z.z.Sync()
}

func FatalLog(msg string, keyValues ...interface{}) {
	std.z.Sugar().Fatalw(msg, keyValues...)
}

func PanicLog(msg string, keyValues ...interface{}) {
	std.z.Sugar().Panicw(msg, keyValues...)
}

func ErrorLog(msg string, keyValues ...interface{}) {
	std.z.Sugar().Errorw(msg, keyValues...)
}

func WarnLog(msg string, keyValues ...interface{}) {
	std.z.Sugar().Warnw(msg, keyValues...)
}

func InfoLog(msg string, keyValues ...interface{}) {
	std.z.Sugar().Infow(msg, keyValues...)
}

func DebugLog(msg string, keyValues ...interface{}) {
	std.z.Sugar().Debugw(msg, keyValues...)
}

func Sync() {
	_ = std.z.Sync()
}