package cop_test

import (
	"errors"
	"fmt"
	"os"
	"os/user"
	"path"
	"runtime"
	"strings"
	"testing"

	"gitea.mmo.to/ppForge/ppforge/cop"
	"gitea.mmo.to/ppForge/ppforge/globals"
)

func getCurrentDir() string {
	_, filename, _, _ := runtime.Caller(0)
	return path.Dir(filename)
}

func getRepoDir(start string) (string, error) {
	var repoPath string
	entries, err := os.ReadDir(start)
	for _, v := range entries {
		if strings.HasSuffix(v.Name(), ".git") {
			repoPath = start
		}
	}
	if repoPath == "" {
		return getRepoDir(path.Dir(start))
	}
	return repoPath, err
}

func setupSuite(t *testing.T) func(t *testing.T) {
	// setup
	// setup testing home dir
	repo, err := getRepoDir(getCurrentDir())
	if err != nil {
		t.Error(err)
	}
	testUserHome := path.Join(repo, "test", "home")
	globals.ConfigDirectoryList = []string{testUserHome, ".config", "ppforge"}
	globals.ConfigDirectory = path.Join(globals.ConfigDirectoryList...)
	globals.CollectionOfProtocolsDir = path.Join(globals.ConfigDirectory, "cop")

	globals.MockUserCurrent = func() (*user.User, error) {
		mu := user.User{}
		mu.HomeDir = testUserHome
		return &mu, nil
	}

	// teardown
	return func(t *testing.T) {
		globals.MockUserCurrent = user.Current
	}
}

func TestOpen(t *testing.T) {
	td := setupSuite(t)
	defer td(t)

	fcop := cop.FileCOP{}
	wd, err := getRepoDir(getCurrentDir())
	if err != nil {
		fmt.Printf("Os error: %s", err)
		t.Fail()
	}
	fcop.Open(path.Join(wd, "test", "cop"))
	l, err := fcop.GetProtocols()
	if err != nil {
		t.Fail()
	}
	for _, pce := range l {
		fmt.Printf("%s//%s\n", pce.Path, pce.Protocol.Name)
	}
}

func TestClosed(t *testing.T) {
	td := setupSuite(t)
	defer td(t)

	fcop := cop.FileCOP{}
	wd, err := getRepoDir(getCurrentDir())
	if err != nil {
		fmt.Printf("Os error: %s", err)
		t.Fail()
	}
	fcop.Open(path.Join(wd, "test", "cop"))
	fcop.Close()
	l, err := fcop.GetProtocols()
	if err == nil || l != nil {
		fmt.Println("Protocols did not deliver error")
		t.Fail()
	}
	err = fcop.Add(nil)
	if err == nil {
		fmt.Println("Add did not deliver error")
		t.Fail()
	}
	err = fcop.Update(nil)
	if err == nil {
		fmt.Println("Update did not deliver error")
		t.Fail()
	}
	err = fcop.Sync()
	if err == nil {
		fmt.Println("UpdateCollection did not deliver error")
		t.Fail()
	}
}

func TestGlobalCOP(t *testing.T) {
	td := setupSuite(t)
	defer td(t)
	cop.Init()
	gcop := cop.GlobalCOP
	pcs := gcop.PCs
	fmt.Printf("Length of all Protocol Collections: %d\n", len(pcs))
	if len(pcs) != 1 {
		fmt.Println("Length != 1")
		t.Fail()
	}
	wd, _ := getRepoDir(getCurrentDir())
	fcop, err := cop.NewFileCOP(path.Join(wd, "test", "cop"))
	if err != nil {
		fmt.Println("Error on loading new FileCOP", err)
		t.Fail()
	}
	gcop.PCs = append(gcop.PCs, fcop.COP)

	fmt.Printf("Length of all Protocol Collections: %d\n", len(gcop.PCs))
	if len(gcop.PCs) != 2 {
		fmt.Println("Amount of COPs is not 2")
		t.Fail()
	}
}

func TestCOPCache(t *testing.T) {
	td := setupSuite(t)
	defer td(t)
	gcop := cop.GlobalCOP
	// reset to zero because of other tests
	gcop.PCs = []cop.COP{}
	cop.Init()
	c := gcop.PCs[0]
	protos := c.Protocols
	if len(protos) != 4 {
		t.Fail()
	}

	err := gcop.WriteCache()
	if err != nil {
		fmt.Println("Writing the cache file failed")
		t.Fail()
	}
	fpath := path.Join(globals.CollectionOfProtocolsDir, globals.COPCacheFileName)
	if _, staterr := os.Stat(fpath); errors.Is(staterr, os.ErrNotExist) {
		fmt.Println("File not existing ", fpath)
		t.Fail()
	}

	// reset again and check if reading the cache works
	gcop.PCs = []cop.COP{}

	err = gcop.ReadCache()
	if err != nil {
		fmt.Println("Reading the cache file failed")
		t.Fail()
	}
	c = gcop.PCs[0]
	protos = c.Protocols
	if len(protos) != 4 {
		t.Fail()
	}

}