// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package tests

import (
	"database/sql"
	"fmt"
	"os"
	"path/filepath"
	"testing"

	"code.gitea.io/gitea/models/db"
	packages_model "code.gitea.io/gitea/models/packages"
	"code.gitea.io/gitea/models/unittest"
	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/graceful"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/modules/storage"
	"code.gitea.io/gitea/modules/test"
	"code.gitea.io/gitea/modules/testlogger"
	"code.gitea.io/gitea/modules/util"
	"code.gitea.io/gitea/routers"

	"github.com/stretchr/testify/assert"
)

func InitTest(requireGitea bool) {
	testlogger.Init()

	giteaRoot := test.SetupGiteaRoot()

	// TODO: Speedup tests that rely on the event source ticker, confirm whether there is any bug or failure.
	// setting.UI.Notification.EventSourceUpdateTime = time.Second

	setting.AppWorkPath = giteaRoot
	setting.CustomPath = filepath.Join(setting.AppWorkPath, "custom")
	if requireGitea {
		giteaBinary := "gitea"
		if setting.IsWindows {
			giteaBinary += ".exe"
		}
		setting.AppPath = filepath.Join(giteaRoot, giteaBinary)
		if _, err := os.Stat(setting.AppPath); err != nil {
			testlogger.Fatalf("Could not find gitea binary at %s\n", setting.AppPath)
		}
	}
	giteaConf := os.Getenv("GITEA_CONF")
	if giteaConf == "" {
		// By default, use sqlite.ini for testing, then IDE like GoLand can start the test process with debugger.
		// It's easier for developers to debug bugs step by step with a debugger.
		// Notice: when doing "ssh push", Gitea executes sub processes, debugger won't work for the sub processes.
		giteaConf = "tests/sqlite.ini"
		_ = os.Setenv("GITEA_CONF", giteaConf)
		_, _ = fmt.Fprintf(os.Stderr, "Environment variable $GITEA_CONF not set - defaulting to %s\n", giteaConf)
		if !setting.EnableSQLite3 {
			testlogger.Fatalf(`sqlite3 requires: -tags sqlite,sqlite_unlock_notify` + "\n")
		}
	}
	if !filepath.IsAbs(giteaConf) {
		setting.CustomConf = filepath.Join(giteaRoot, giteaConf)
	} else {
		setting.CustomConf = giteaConf
	}

	unittest.InitSettingsForTesting()
	setting.Repository.DefaultBranch = "master" // many test code still assume that default branch is called "master"

	if err := git.InitFull(); err != nil {
		log.Fatal("git.InitOnceWithSync: %v", err)
	}

	setting.LoadDBSetting()
	if err := storage.Init(); err != nil {
		testlogger.Fatalf("Init storage failed: %v\n", err)
	}

	switch {
	case setting.Database.Type.IsMySQL():
		connType := "tcp"
		if len(setting.Database.Host) > 0 && setting.Database.Host[0] == '/' { // looks like a unix socket
			connType = "unix"
		}

		db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@%s(%s)/",
			setting.Database.User, setting.Database.Passwd, connType, setting.Database.Host))
		defer db.Close()
		if err != nil {
			log.Fatal("sql.Open: %v", err)
		}
		if _, err = db.Exec("CREATE DATABASE IF NOT EXISTS " + setting.Database.Name); err != nil {
			log.Fatal("db.Exec: %v", err)
		}
	case setting.Database.Type.IsPostgreSQL():
		var db *sql.DB
		var err error
		if setting.Database.Host[0] == '/' {
			db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@/%s?sslmode=%s&host=%s",
				setting.Database.User, setting.Database.Passwd, setting.Database.Name, setting.Database.SSLMode, setting.Database.Host))
		} else {
			db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=%s",
				setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.Name, setting.Database.SSLMode))
		}

		defer db.Close()
		if err != nil {
			log.Fatal("sql.Open: %v", err)
		}
		dbrows, err := db.Query(fmt.Sprintf("SELECT 1 FROM pg_database WHERE datname = '%s'", setting.Database.Name))
		if err != nil {
			log.Fatal("db.Query: %v", err)
		}
		defer dbrows.Close()

		if !dbrows.Next() {
			if _, err = db.Exec("CREATE DATABASE " + setting.Database.Name); err != nil {
				log.Fatal("db.Exec: CREATE DATABASE: %v", err)
			}
		}
		// Check if we need to setup a specific schema
		if len(setting.Database.Schema) == 0 {
			break
		}
		db.Close()

		if setting.Database.Host[0] == '/' {
			db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@/%s?sslmode=%s&host=%s",
				setting.Database.User, setting.Database.Passwd, setting.Database.Name, setting.Database.SSLMode, setting.Database.Host))
		} else {
			db, err = sql.Open("postgres", fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=%s",
				setting.Database.User, setting.Database.Passwd, setting.Database.Host, setting.Database.Name, setting.Database.SSLMode))
		}
		// This is a different db object; requires a different Close()
		defer db.Close()
		if err != nil {
			log.Fatal("sql.Open: %v", err)
		}
		schrows, err := db.Query(fmt.Sprintf("SELECT 1 FROM information_schema.schemata WHERE schema_name = '%s'", setting.Database.Schema))
		if err != nil {
			log.Fatal("db.Query: %v", err)
		}
		defer schrows.Close()

		if !schrows.Next() {
			// Create and setup a DB schema
			if _, err = db.Exec("CREATE SCHEMA " + setting.Database.Schema); err != nil {
				log.Fatal("db.Exec: CREATE SCHEMA: %v", err)
			}
		}

	case setting.Database.Type.IsMSSQL():
		host, port := setting.ParseMSSQLHostPort(setting.Database.Host)
		db, err := sql.Open("mssql", fmt.Sprintf("server=%s; port=%s; database=%s; user id=%s; password=%s;",
			host, port, "master", setting.Database.User, setting.Database.Passwd))
		if err != nil {
			log.Fatal("sql.Open: %v", err)
		}
		if _, err := db.Exec(fmt.Sprintf("If(db_id(N'%s') IS NULL) BEGIN CREATE DATABASE %s; END;", setting.Database.Name, setting.Database.Name)); err != nil {
			log.Fatal("db.Exec: %v", err)
		}
		defer db.Close()
	}

	routers.InitWebInstalled(graceful.GetManager().HammerContext())
}

func PrepareAttachmentsStorage(t testing.TB) {
	// prepare attachments directory and files
	assert.NoError(t, storage.Clean(storage.Attachments))

	s, err := storage.NewStorage(setting.LocalStorageType, &setting.Storage{
		Path: filepath.Join(filepath.Dir(setting.AppPath), "tests", "testdata", "data", "attachments"),
	})
	assert.NoError(t, err)
	assert.NoError(t, s.IterateObjects("", func(p string, obj storage.Object) error {
		_, err = storage.Copy(storage.Attachments, p, s, p)
		return err
	}))
}

func PrepareGitRepoDirectory(t testing.TB) {
	if !assert.NotEmpty(t, setting.RepoRootPath) {
		return
	}
	assert.NoError(t, unittest.SyncDirs(filepath.Join(filepath.Dir(setting.AppPath), "tests/gitea-repositories-meta"), setting.RepoRootPath))
}

func PrepareArtifactsStorage(t testing.TB) {
	// prepare actions artifacts directory and files
	assert.NoError(t, storage.Clean(storage.ActionsArtifacts))

	s, err := storage.NewStorage(setting.LocalStorageType, &setting.Storage{
		Path: filepath.Join(filepath.Dir(setting.AppPath), "tests", "testdata", "data", "artifacts"),
	})
	assert.NoError(t, err)
	assert.NoError(t, s.IterateObjects("", func(p string, obj storage.Object) error {
		_, err = storage.Copy(storage.ActionsArtifacts, p, s, p)
		return err
	}))
}

func PrepareLFSStorage(t testing.TB) {
	// load LFS object fixtures
	// (LFS storage can be on any of several backends, including remote servers, so init it with the storage API)
	lfsFixtures, err := storage.NewStorage(setting.LocalStorageType, &setting.Storage{
		Path: filepath.Join(filepath.Dir(setting.AppPath), "tests/gitea-lfs-meta"),
	})
	assert.NoError(t, err)
	assert.NoError(t, storage.Clean(storage.LFS))
	assert.NoError(t, lfsFixtures.IterateObjects("", func(path string, _ storage.Object) error {
		_, err := storage.Copy(storage.LFS, path, lfsFixtures, path)
		return err
	}))
}

func PrepareCleanPackageData(t testing.TB) {
	// clear all package data
	assert.NoError(t, db.TruncateBeans(t.Context(),
		&packages_model.Package{},
		&packages_model.PackageVersion{},
		&packages_model.PackageFile{},
		&packages_model.PackageBlob{},
		&packages_model.PackageProperty{},
		&packages_model.PackageBlobUpload{},
		&packages_model.PackageCleanupRule{},
	))
	assert.NoError(t, storage.Clean(storage.Packages))
}

func PrepareTestEnv(t testing.TB, skip ...int) func() {
	t.Helper()
	deferFn := PrintCurrentTest(t, util.OptionalArg(skip)+1)

	// load database fixtures
	assert.NoError(t, unittest.LoadFixtures())

	// do not add more Prepare* functions here, only call necessary ones in the related test functions
	PrepareGitRepoDirectory(t)
	PrepareLFSStorage(t)
	PrepareCleanPackageData(t)
	return deferFn
}

func PrintCurrentTest(t testing.TB, skip ...int) func() {
	t.Helper()
	return testlogger.PrintCurrentTest(t, util.OptionalArg(skip)+1)
}
