// Copyright 2025 WIT.COM Inc Licensed GPL 3.0

package forgepb

import (
	"errors"
	"os"
	"os/user"
	"path/filepath"

	"go.wit.com/lib/cobol"
	"go.wit.com/lib/config"
	"go.wit.com/lib/env"
	"go.wit.com/lib/fhelp"
	"go.wit.com/log"
)

/* better syntax from gin

Default returns an Engine instance with the Logger and Recovery middleware already attached.
func Default(opts ...OptionFunc) *Engine {
	engine := New()
	engine.Use(Logger(), Recovery())
	return engine.With(opts...)
}

*/

func Init() (*Forge, error) {
	f := new(Forge)
	f.Config = NewForgeConfigs()
	err := f.Config.loadConfig()
	err = errors.Join(err, f.postInit())
	return f, err
}

func InitByAppname(argname string) (*Forge, error) {
	log.Info("InitByAppname() IS DEPRECATED AND DOESNT DO ANYTHING")
	return Init()
}

func InitByFullpath(filename string) (*Forge, error) {
	f := new(Forge)
	cfg := NewForgeConfigs()
	cfg.Filename = filename
	err := config.ReLoad(cfg)
	f.Config = cfg

	err = errors.Join(err, f.postInit())
	if err != nil {
		log.Info("forge.InitByFullpath() error:", filename, err)
	}
	return f, err
}

// saves the config if there have been changes
func (f *Forge) Close() error {
	if err := f.Save(); err != nil {
		return err
	}
	return nil
}

func (f *Forge) postInit() error {
	cache := "auto"
	if env.Get("cache") == "" {
		// leave "auto" by default
	} else {
		// get the users default preference
		cache = env.Get("cache")
	}

	// if cache is set to "auto", this detects if you are in a
	// a golang directory (~/go/src) or in a dir that has a "go.work" file
	if cache == "auto" {
		if godir, ok := fhelp.FindGoWork(); ok {
			f.mode = ForgeMode_GOLANG
			cache = "gowork"
			env.SetGlobal("lib/forgepb", "GoWork", "true")
			env.SetGlobal("lib/forgepb", "gopath", godir)
			fullname := filepath.Join(godir, "gowork.pb")
			env.SetGlobal("lib/forgepb", "ReposPB", fullname)
		} else {
			gopath := filepath.Join(env.Get("homedir"), "go/src")

			pwd, err := os.Getwd()
			if err == nil {
				_, err := filepath.Rel(gopath, pwd)
				if err == nil {
					f.mode = ForgeMode_GOLANG
					// user is running forge from within ~/go/src
					env.SetGlobal("lib/forgepb", "gopath", gopath)
					cache = "gosrc"
				}
			}
			// always define
			if env.Get("gopath") == "" {
				env.SetGlobal("lib/forgepb", "gopath", gopath)
			}
		}
	}
	f.configureCache(cache)

	// always define
	if env.Get("username") == "" {
		usr, _ := user.Current()
		env.SetGlobal("lib/forgepb", "username", usr.Username)
		env.Save()
	}

	// always define
	if env.Get("homeDir") == "" {
		homeDir, _ := os.UserHomeDir()
		env.SetGlobal("lib/forgepb", "homeDir", homeDir)
		env.Save()
	}

	// always define
	if env.Get("curpatches") == "" {
		env.SetGlobal("lib/forgepb", "curpatches", "curpatches.pb")
	}

	// converts the lib/ENV "mode" string
	// todo: rethink all this
	f.mode = getModeENV()

	// todo: play with these / determine good values based on user's machine
	if cobol.Int(env.Get("RillX")) == 0 {
		env.SetGlobal("lib/forgepb", "RillX", "10")
	}
	if cobol.Int(env.Get("RillY")) == 0 {
		env.SetGlobal("lib/forgepb", "RillY", "20")
		env.Save()
	}

	// create an initial repos.pb file
	// panic() here? // warning? // (probably not. it's just the repos.pb cache file
	err := f.reposCacheLoad() // loads the file from ~/.cache/forge/repos.pb
	if err == nil {
		if env.Verbose() {
			log.Printf("forge loaded %s file with len(%d) repos\n", f.Repos.Filename, f.Repos.Len())
		}
	} else {
		log.Printf("forge failed to load %s file with len(%d) repos err=(%v)\n", f.Repos.Filename, f.Repos.Len(), err)
		panic("failed to load repos.pb")
	}
	err = f.patchesCacheLoad() // loads the file from ~/.cache/forge/patches.pb
	if err == nil {
		// log.Printf("forge loaded %s file with len(%d) repos\n", f.Repos.Filename, f.Repos.Len())
	} else {
		log.Printf("forge failed to load %s file with len(%d) patches err=(%v)\n", f.Patches.Filename, f.Patches.Len(), err)
		panic("failed to load repos.pb")
	}
	return err
}