// Copyright 2015 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package user

import (
	api "code.gitea.io/sdk/gitea"

	"code.gitea.io/gitea/models"
	"code.gitea.io/gitea/modules/context"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/routers/api/v1/convert"
	"code.gitea.io/gitea/routers/api/v1/repo"
)

// GetUserByParamsName get user by name
func GetUserByParamsName(ctx *context.APIContext, name string) *models.User {
	user, err := models.GetUserByName(ctx.Params(name))
	if err != nil {
		if models.IsErrUserNotExist(err) {
			ctx.Status(404)
		} else {
			ctx.Error(500, "GetUserByName", err)
		}
		return nil
	}
	return user
}

// GetUserByParams returns user whose name is presented in URL paramenter.
func GetUserByParams(ctx *context.APIContext) *models.User {
	return GetUserByParamsName(ctx, ":username")
}

func composePublicKeysAPILink() string {
	return setting.AppURL + "api/v1/user/keys/"
}

func listPublicKeys(ctx *context.APIContext, uid int64) {
	keys, err := models.ListPublicKeys(uid)
	if err != nil {
		ctx.Error(500, "ListPublicKeys", err)
		return
	}

	apiLink := composePublicKeysAPILink()
	apiKeys := make([]*api.PublicKey, len(keys))
	for i := range keys {
		apiKeys[i] = convert.ToPublicKey(apiLink, keys[i])
	}

	ctx.JSON(200, &apiKeys)
}

// ListMyPublicKeys list all my public keys
func ListMyPublicKeys(ctx *context.APIContext) {
	// swagger:route GET /user/keys user userCurrentListKeys
	//
	//     Produces:
	//     - application/json
	//
	//     Responses:
	//       200: PublicKeyList
	//       500: error

	listPublicKeys(ctx, ctx.User.ID)
}

// ListPublicKeys list all user's public keys
func ListPublicKeys(ctx *context.APIContext) {
	// swagger:route GET /users/{username}/keys user userListKeys
	//
	//     Produces:
	//     - application/json
	//
	//     Responses:
	//       200: PublicKeyList
	//       500: error

	user := GetUserByParams(ctx)
	if ctx.Written() {
		return
	}
	listPublicKeys(ctx, user.ID)
}

// GetPublicKey get one public key
func GetPublicKey(ctx *context.APIContext) {
	// swagger:route GET /user/keys/{id} user userCurrentGetKey
	//
	//     Produces:
	//     - application/json
	//
	//     Responses:
	//       200: PublicKey
	//       404: notFound
	//       500: error

	key, err := models.GetPublicKeyByID(ctx.ParamsInt64(":id"))
	if err != nil {
		if models.IsErrKeyNotExist(err) {
			ctx.Status(404)
		} else {
			ctx.Error(500, "GetPublicKeyByID", err)
		}
		return
	}

	apiLink := composePublicKeysAPILink()
	ctx.JSON(200, convert.ToPublicKey(apiLink, key))
}

// CreateUserPublicKey creates new public key to given user by ID.
func CreateUserPublicKey(ctx *context.APIContext, form api.CreateKeyOption, uid int64) {
	content, err := models.CheckPublicKeyString(form.Key)
	if err != nil {
		repo.HandleCheckKeyStringError(ctx, err)
		return
	}

	key, err := models.AddPublicKey(uid, form.Title, content)
	if err != nil {
		repo.HandleAddKeyError(ctx, err)
		return
	}
	apiLink := composePublicKeysAPILink()
	ctx.JSON(201, convert.ToPublicKey(apiLink, key))
}

// CreatePublicKey create one public key for me
func CreatePublicKey(ctx *context.APIContext, form api.CreateKeyOption) {
	// swagger:route POST /user/keys user userCurrentPostKey
	//
	//     Consumes:
	//     - application/json
	//
	//     Produces:
	//     - application/json
	//
	//     Responses:
	//       201: PublicKey
	//       422: validationError
	//       500: error

	CreateUserPublicKey(ctx, form, ctx.User.ID)
}

// DeletePublicKey delete one public key of mine
func DeletePublicKey(ctx *context.APIContext) {
	// swagger:route DELETE /user/keys/{id} user userCurrentDeleteKey
	//
	//     Produces:
	//     - application/json
	//
	//     Responses:
	//       204: empty
	//       403: forbidden
	//       500: error

	if err := models.DeletePublicKey(ctx.User, ctx.ParamsInt64(":id")); err != nil {
		if models.IsErrKeyAccessDenied(err) {
			ctx.Error(403, "", "You do not have access to this key")
		} else {
			ctx.Error(500, "DeletePublicKey", err)
		}
		return
	}

	ctx.Status(204)
}