// Copyright 2023 Harness, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package gitspace

import (
	"context"
	"fmt"

	apiauth "github.com/harness/gitness/app/api/auth"
	"github.com/harness/gitness/app/auth"
	"github.com/harness/gitness/types"
	"github.com/harness/gitness/types/enum"
)

func (c *Controller) Find(
	ctx context.Context,
	session *auth.Session,
	spaceRef string,
	identifier string,
) (*types.GitspaceConfig, error) {
	space, err := c.spaceStore.FindByRef(ctx, spaceRef)
	const resourceNotFoundErr = "Failed to find gitspace: resource not found"
	if err != nil {
		return nil, fmt.Errorf("failed to find space: %w", err)
	}
	err = apiauth.CheckGitspace(ctx, c.authorizer, session, space.Path, identifier, enum.PermissionGitspaceView)
	if err != nil {
		return nil, fmt.Errorf("failed to authorize: %w", err)
	}
	var gitspaceConfig *types.GitspaceConfig
	err = c.tx.WithTx(ctx, func(ctx context.Context) error {
		gitspaceConfig, err = c.gitspaceConfigStore.FindByIdentifier(ctx, space.ID, identifier)
		if err != nil {
			return fmt.Errorf("failed to find gitspace config: %w", err)
		}
		infraProviderResource, err := c.infraProviderResourceStore.Find(
			ctx,
			gitspaceConfig.InfraProviderResourceID)
		if err != nil {
			return fmt.Errorf("failed to find infra provider resource for gitspace config: %w", err)
		}
		gitspaceConfig.SpacePath = space.Path
		gitspaceConfig.InfraProviderResourceIdentifier = infraProviderResource.Identifier
		instance, err := c.gitspaceInstanceStore.FindLatestByGitspaceConfigID(ctx, gitspaceConfig.ID, gitspaceConfig.SpaceID)
		if err != nil && err.Error() != resourceNotFoundErr { // TODO fix this
			return fmt.Errorf("failed to find gitspace instance for config ID : %s %w", gitspaceConfig.Identifier, err)
		}
		if instance != nil {
			gitspaceConfig.GitspaceInstance = instance
			instance.SpacePath = gitspaceConfig.SpacePath
			gitspaceStateType, err := enum.GetGitspaceStateFromInstance(instance.State)
			if err != nil {
				return err
			}
			gitspaceConfig.State = gitspaceStateType
		} else {
			gitspaceConfig.State = enum.GitspaceStateUninitialized
		}
		return nil
	})
	if err != nil {
		return nil, err
	}
	return gitspaceConfig, nil
}