package projects

import (
	"fmt"
	"net/http"

	"github.com/semaphoreui/semaphore/api/helpers"
	"github.com/semaphoreui/semaphore/db"

	"github.com/gorilla/context"
)

// KeyMiddleware ensures a key exists and loads it to the context
func KeyMiddleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		project := context.Get(r, "project").(db.Project)
		keyID, err := helpers.GetIntParam("key_id", w, r)
		if err != nil {
			return
		}

		key, err := helpers.Store(r).GetAccessKey(project.ID, keyID)

		if err != nil {
			helpers.WriteError(w, err)
			return
		}

		context.Set(r, "accessKey", key)
		next.ServeHTTP(w, r)
	})
}

func GetKeyRefs(w http.ResponseWriter, r *http.Request) {
	key := context.Get(r, "accessKey").(db.AccessKey)
	refs, err := helpers.Store(r).GetAccessKeyRefs(*key.ProjectID, key.ID)
	if err != nil {
		helpers.WriteError(w, err)
		return
	}

	helpers.WriteJSON(w, http.StatusOK, refs)
}

// GetKeys retrieves sorted keys from the database
func GetKeys(w http.ResponseWriter, r *http.Request) {
	if key := context.Get(r, "accessKey"); key != nil {
		k := key.(db.AccessKey)
		helpers.WriteJSON(w, http.StatusOK, k)
		return
	}

	project := context.Get(r, "project").(db.Project)
	var keys []db.AccessKey

	keys, err := helpers.Store(r).GetAccessKeys(project.ID, helpers.QueryParams(r.URL))

	if err != nil {
		helpers.WriteError(w, err)
		return
	}

	helpers.WriteJSON(w, http.StatusOK, keys)
}

// AddKey adds a new key to the database
func AddKey(w http.ResponseWriter, r *http.Request) {
	project := context.Get(r, "project").(db.Project)
	var key db.AccessKey

	if !helpers.Bind(w, r, &key) {
		return
	}

	if key.ProjectID == nil || *key.ProjectID != project.ID {
		helpers.WriteJSON(w, http.StatusBadRequest, map[string]string{
			"error": "Project ID in body and URL must be the same",
		})
		return
	}

	if err := key.Validate(true); err != nil {
		helpers.WriteJSON(w, http.StatusBadRequest, map[string]string{
			"error": err.Error(),
		})
		return
	}

	newKey, err := helpers.Store(r).CreateAccessKey(key)

	if err != nil {
		helpers.WriteError(w, err)
		return
	}

	helpers.EventLog(r, helpers.EventLogCreate, helpers.EventLogItem{
		UserID:      helpers.UserFromContext(r).ID,
		ProjectID:   *newKey.ProjectID,
		ObjectType:  db.EventKey,
		ObjectID:    newKey.ID,
		Description: fmt.Sprintf("Access Key %s created", key.Name),
	})

	// Reload key to drop sensitive fields
	key, err = helpers.Store(r).GetAccessKey(*newKey.ProjectID, newKey.ID)
	if err != nil {
		helpers.WriteError(w, err)
		return
	}

	helpers.WriteJSON(w, http.StatusCreated, key)
}

// UpdateKey updates key in database
// nolint: gocyclo
func UpdateKey(w http.ResponseWriter, r *http.Request) {
	var key db.AccessKey
	oldKey := context.Get(r, "accessKey").(db.AccessKey)

	if !helpers.Bind(w, r, &key) {
		return
	}

	repos, err := helpers.Store(r).GetRepositories(*key.ProjectID, db.RetrieveQueryParams{})
	if err != nil {
		helpers.WriteError(w, err)
		return
	}

	for _, repo := range repos {
		if repo.SSHKeyID != key.ID {
			continue
		}
		err = repo.ClearCache()
		if err != nil {
			helpers.WriteError(w, err)
			return
		}
	}

	err = helpers.Store(r).UpdateAccessKey(key)
	if err != nil {
		helpers.WriteError(w, err)
		return
	}

	helpers.EventLog(r, helpers.EventLogUpdate, helpers.EventLogItem{
		UserID:      helpers.UserFromContext(r).ID,
		ProjectID:   *oldKey.ProjectID,
		ObjectType:  db.EventKey,
		ObjectID:    oldKey.ID,
		Description: fmt.Sprintf("Access Key %s updated", key.Name),
	})

	w.WriteHeader(http.StatusNoContent)
}

// RemoveKey deletes a key from the database
func RemoveKey(w http.ResponseWriter, r *http.Request) {
	key := context.Get(r, "accessKey").(db.AccessKey)

	err := helpers.Store(r).DeleteAccessKey(*key.ProjectID, key.ID)
	if err == db.ErrInvalidOperation {
		helpers.WriteJSON(w, http.StatusBadRequest, map[string]interface{}{
			"error": "Access Key is in use by one or more templates",
			"inUse": true,
		})
		return
	}

	if err != nil {
		helpers.WriteError(w, err)
		return
	}

	helpers.EventLog(r, helpers.EventLogDelete, helpers.EventLogItem{
		UserID:      helpers.UserFromContext(r).ID,
		ProjectID:   *key.ProjectID,
		ObjectType:  db.EventKey,
		ObjectID:    key.ID,
		Description: fmt.Sprintf("Access Key %s deleted", key.Name),
	})

	w.WriteHeader(http.StatusNoContent)
}