package api

import (
	"net/http"
	"strconv"

	"github.com/ente-io/museum/pkg/controller/storagebonus"

	"github.com/ente-io/museum/ente"
	"github.com/ente-io/museum/pkg/controller"
	"github.com/ente-io/museum/pkg/utils/auth"
	"github.com/ente-io/museum/pkg/utils/handler"
	"github.com/ente-io/stacktrace"
	"github.com/gin-gonic/gin"
)

// PublicCollectionHandler exposes request handlers for publicly accessible collections
type PublicCollectionHandler struct {
	Controller             *controller.PublicCollectionController
	FileCtrl               *controller.FileController
	CollectionCtrl         *controller.CollectionController
	StorageBonusController *storagebonus.Controller
}

// GetThumbnail redirects the request to the file's thumbnail location
func (h *PublicCollectionHandler) GetThumbnail(c *gin.Context) {
	h.getFileForType(c, ente.THUMBNAIL)
}

// GetFile redirects the request to the file location
func (h *PublicCollectionHandler) GetFile(c *gin.Context) {
	h.getFileForType(c, ente.FILE)
}

// GetCollection redirects the request to the collection location
func (h *PublicCollectionHandler) GetCollection(c *gin.Context) {
	collection, err := h.Controller.GetPublicCollection(c, false)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	referralCode, _ := h.StorageBonusController.GetOrCreateReferralCode(c, collection.Owner.ID)
	c.JSON(http.StatusOK, gin.H{
		"collection":   collection,
		"referralCode": referralCode,
	})
}

// GetUploadUrls returns upload Urls where files can be uploaded
func (h *PublicCollectionHandler) GetUploadUrls(c *gin.Context) {
	enteApp := auth.GetApp(c)

	collection, err := h.Controller.GetPublicCollection(c, true)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	userID := collection.Owner.ID
	count, _ := strconv.Atoi(c.Query("count"))
	urls, err := h.FileCtrl.GetUploadURLs(c, userID, count, enteApp)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"urls": urls,
	})
}

// GetMultipartUploadURLs returns upload Urls where files can be uploaded
func (h *PublicCollectionHandler) GetMultipartUploadURLs(c *gin.Context) {
	enteApp := auth.GetApp(c)

	collection, err := h.Controller.GetPublicCollection(c, true)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	userID := collection.Owner.ID
	count, _ := strconv.Atoi(c.Query("count"))
	urls, err := h.FileCtrl.GetMultipartUploadURLs(c, userID, count, enteApp)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"urls": urls,
	})
}

// CreateFile create a new file inside the collection corresponding to the public accessToken
func (h *PublicCollectionHandler) CreateFile(c *gin.Context) {
	var file ente.File
	if err := c.ShouldBindJSON(&file); err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}

	enteApp := auth.GetApp(c)

	fileRes, err := h.Controller.CreateFile(c, file, enteApp)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	c.JSON(http.StatusOK, fileRes)
}

// VerifyPassword verifies the password for given public access token and return signed jwt token if it's valid
func (h *PublicCollectionHandler) VerifyPassword(c *gin.Context) {
	var req ente.VerifyPasswordRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	resp, err := h.Controller.VerifyPassword(c, req)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	c.JSON(http.StatusOK, resp)
}

// ReportAbuse captures abuse report for a public collection
func (h *PublicCollectionHandler) ReportAbuse(c *gin.Context) {
	var req ente.AbuseReportRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	err := h.Controller.ReportAbuse(c, req)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	c.Status(http.StatusOK)
}

// GetDiff returns the diff within a collection since a timestamp
func (h *PublicCollectionHandler) GetDiff(c *gin.Context) {
	sinceTime, err := strconv.ParseInt(c.Query("sinceTime"), 10, 64)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	files, hasMore, err := h.CollectionCtrl.GetPublicDiff(c, sinceTime)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"diff":    files,
		"hasMore": hasMore,
	})
}

func (h *PublicCollectionHandler) getFileForType(c *gin.Context, objectType ente.ObjectType) {
	fileID, err := strconv.ParseInt(c.Param("fileID"), 10, 64)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(ente.ErrBadRequest, ""))
		return
	}
	url, err := h.FileCtrl.GetPublicFileURL(c, fileID, objectType)
	if err != nil {
		handler.Error(c, stacktrace.Propagate(err, ""))
		return
	}
	c.Redirect(http.StatusTemporaryRedirect, url)
}