package storage

import (
	"context"
	"fmt"
	"github.com/google/uuid"
	"github.com/spf13/viper"
	"reflect"
	"strings"
	"testing"
)

var cfg *viper.Viper

func init() {
	cfg = viper.New()
	cfg.SetDefault("storage.db.psql.host", "localhost")
	cfg.SetDefault("storage.db.psql.port", "5432")
	cfg.SetDefault("storage.db.psql.user", "postgres")
	cfg.SetDefault("storage.db.psql.password", "postgres")
	cfg.SetDefault("storage.db.psql.dbname", "coopgo_platform")
	cfg.SetDefault("storage.db.psql.sslmode", "disable")
	cfg.SetDefault("storage.db.psql.schema", "groups_management")
	cfg.SetDefault("storage.db.psql.tables.groups", "groups")
	cfg.SetDefault("storage.db.psql.tables.group_members", "group_members")
	cfg.SetConfigName("config") // Override default values in a config.yaml file within this directory
	cfg.AddConfigPath(".")
	cfg.ReadInConfig()
}

var group = Group{
	ID:        uuid.New().String(),
	Namespace: "test_namespace",
	Members:   []string{uuid.NewString(), uuid.NewString()},
	Data: map[string]any{
		"test": "test",
	},
}

var group1 = Group{
	ID:        uuid.New().String(),
	Namespace: "namespace",
	Members:   []string{uuid.NewString(), uuid.NewString()},
	Data: map[string]any{
		"test": "test",
	},
}

var groupmember = GroupMember{
	ID:       uuid.New().String(),
	Memberid: uuid.NewString(),
	Groupid:  group.ID,
	Data: map[string]any{
		"test": "test",
	},
}
var groupmember1 = GroupMember{
	ID:       uuid.New().String(),
	Memberid: uuid.NewString(),
	Groupid:  group1.ID,
	Data: map[string]any{
		"test": "test",
	},
}

func TestPostgresqlStorage_Initialize(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	defer storage.DbConnection.Close()

	err = storage.Migrate()
	if err != nil {
		t.Errorf("database migration issue: %v", err)
		return
	}

	tx, err := storage.DbConnection.BeginTx(context.Background(), nil)
	if err != nil {
		t.Errorf("transaction issue: %v", err)
		return
	}
	defer tx.Rollback()
	_, err = tx.Exec(fmt.Sprintf("DELETE FROM %s;", storage.Tables["group_members"]))
	if err != nil {
		t.Errorf("delete accounts group_members issue: %v", err)
		return
	}
	_, err = tx.Exec(fmt.Sprintf("DELETE FROM %s;", storage.Tables["groups"]))
	if err != nil {
		t.Errorf("delete accounts groups issue: %v", err)
		return
	}
	if err = tx.Commit(); err != nil {
		t.Errorf("commit transaction issue: %v", err)
		return
	}
}

func TestPostgresqlStorage_CreateAndGetGroup(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	retrieved, err := storage.GetGroup(group.ID)
	if err != nil {
		t.Errorf("Failed to get group: %s", err)
		return
	}

	if !reflect.DeepEqual(&group, retrieved) {
		t.Errorf("The received group is not the same as expected\nSaved Group : %v\nRetrieved Group : %v",
			&group, retrieved)
	}
}

func TestPostgresqlStorage_Migrate(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	err = storage.Migrate()
	if err != nil {
		t.Error(err)
	}
}

func TestPostgresqlStorage_GetGroups(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	group.Namespace = "x"
	group1.Namespace = "y"
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group: %s", err)
		return
	}
	err = storage.CreateGroup(group1)
	if err != nil {
		t.Errorf("Failed to create group1 : %s", err)
		return
	}
	groups, err := storage.GetGroups([]string{group.Namespace, group1.Namespace})
	if err != nil {
		t.Error(err)
	}
	expectedGroups := []Group{
		{
			ID:        group.ID,
			Namespace: "x",
			Members:   group.Members,
			Data:      group.Data,
		},
		{
			ID:        group1.ID,
			Namespace: "y",
			Members:   group1.Members,
			Data:      group1.Data,
		},
	}
	if !reflect.DeepEqual(expectedGroups, groups) {
		t.Errorf("The received groups is not the same as expected")
	}

}

func TestPostgresqlStorage_GetGroupsByIds(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	err = storage.CreateGroup(group1)
	if err != nil {
		t.Errorf("Failed to create group1 : %s", err)
		return
	}
	retrievedGroups, err := storage.GetGroupsByIds([]string{group.ID, group1.ID})
	if err != nil {
		t.Errorf("error retrieving groups by IDS: %v", err)
	}
	if len(retrievedGroups) != 2 {
		t.Error("Error in retrieving groups by IDs")
	}
	expectedGroups := []Group{
		{
			ID:        group.ID,
			Namespace: group.Namespace,
			Members:   group.Members,
			Data:      group.Data,
		},
		{
			ID:        group1.ID,
			Namespace: group1.Namespace,
			Members:   group1.Members,
			Data:      group1.Data,
		},
	}
	if !reflect.DeepEqual(expectedGroups, retrievedGroups) {
		t.Errorf("The received groups is not the same as expected")
	}

}

func TestPostgresqlStorage_UpdateGroup(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	group.Namespace = "updated_namespace"
	group.Members = []string{"updated"}
	group.Data = map[string]any{
		"updated": "updated",
	}
	err = storage.UpdateGroup(group)
	if err != nil {
		t.Error(err)
	}
	group, err := storage.GetGroup(group.ID)
	if err != nil {
		t.Error(err)
	}
	expectedGroup := &Group{
		ID:        group.ID,
		Namespace: group.Namespace,
		Members:   group.Members,
		Data:      group.Data,
	}
	if !reflect.DeepEqual(group, expectedGroup) {
		t.Errorf("The received groups is not the same as expected")
	}
}

func TestPostgresqlStorage_CreateAndGetGroupMember(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	groupmember.Groupid = group.ID
	err = storage.CreateGroupMember(groupmember)
	if err != nil {
		t.Errorf("error creating new group member: %v", err)
	}
	received, err := storage.GetGroupMember(groupmember.ID)
	if err != nil {
		t.Errorf("error getting a group member: %v", err)
	}
	if !reflect.DeepEqual(received, &groupmember) {
		t.Errorf("The received groups is not the same as expected")
	}
}

func TestPostgresqlStorage_GetGroupsMember(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	group.Namespace = "xyxy"
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	groupmember.Groupid = group.ID
	err = storage.CreateGroupMember(groupmember)
	if err != nil {
		t.Errorf("error creating new group member: %v", err)
	}
	groupMembers, err := storage.GetGroupsMember([]string{"xyxy"})
	if err != nil {
		t.Errorf("error getting group members: %v", err)
	}
	expectedGroupMembers := []GroupMember{
		{
			ID:       groupmember.ID,
			Memberid: groupmember.Memberid,
			Groupid:  groupmember.Groupid,
			Data:     groupmember.Data,
		},
	}
	if !reflect.DeepEqual(expectedGroupMembers, groupMembers) {
		t.Errorf("The received group members slice is not the same as expected")
	}
}

func TestPostgresqlStorage_GetGroupsMemberByIds(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	err = storage.CreateGroupMember(groupmember)
	if err != nil {
		t.Errorf("error creating new group member: %v", err)
	}
	if err != nil {
		t.Errorf("error getting group members: %v", err)
	}
	err = storage.CreateGroup(group1)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	err = storage.CreateGroupMember(groupmember1)
	if err != nil {
		t.Errorf("error creating new group member: %v", err)
	}
	groupmembers, err := storage.GetGroupsMemberByIds([]string{groupmember.Groupid, groupmember1.Groupid})
	if err != nil {
		t.Errorf("error creating in getting group members by IDS: %v", err)
	}
	expectedGroupMembers := []GroupMember{
		groupmember,
		groupmember1,
	}
	if !reflect.DeepEqual(expectedGroupMembers, groupmembers) {
		t.Errorf("The received group members slice is not the same as expected")
	}

}

func TestPostgresqlStorage_UpdateGroupMember(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	groupmember.Groupid = group.ID
	err = storage.CreateGroupMember(groupmember)
	if err != nil {
		t.Errorf("error creating new group member: %v", err)
	}
	groupmember.Data = map[string]any{
		"updated": "updated",
	}
	err = storage.UpdateGroupMember(groupmember)
	if err != nil {
		t.Error("failed to update group member")
	}
	updatedGroupMember, err := storage.GetGroupMember(groupmember.ID)
	if err != nil {
		t.Error("failed to get group member")
	}
	if !reflect.DeepEqual(updatedGroupMember, &groupmember) {
		t.Errorf("The received group members slice is not the same as expected")
	}

}

func TestPostgresqlStorage_DeleteGroupMember(t *testing.T) {
	storage, err := NewPostgresqlStorage(cfg)
	if err != nil {
		t.Errorf("error creating new PostgreSQL storage: %v", err)
	}
	err = storage.CreateGroup(group)
	if err != nil {
		t.Errorf("Failed to create group : %s", err)
		return
	}
	groupmember.Groupid = group.ID
	err = storage.CreateGroupMember(groupmember)
	if err != nil {
		t.Errorf("error creating new group member: %v", err)
	}
	err = storage.DeleteGroupMember(groupmember.ID)
	if err != nil {
		t.Error("error in deleting a group member")
	}
	_, err = storage.GetGroupMember(groupmember.ID)
	if strings.Contains(err.Error(), "no rows in result set") == false {
		t.Error("Delete operation failed", err)
	}

}