// 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 admin

import (
	"code.gitea.io/gitea/models"
	"code.gitea.io/gitea/modules/context"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/routers/api/v1/user"
	api "code.gitea.io/sdk/gitea"
)

func parseLoginSource(ctx *context.APIContext, u *models.User, sourceID int64, loginName string) {
	if sourceID == 0 {
		return
	}

	source, err := models.GetLoginSourceByID(sourceID)
	if err != nil {
		if models.IsErrLoginSourceNotExist(err) {
			ctx.Error(422, "", err)
		} else {
			ctx.Error(500, "GetLoginSourceByID", err)
		}
		return
	}

	u.LoginType = source.Type
	u.LoginSource = source.ID
	u.LoginName = loginName
}

// CreateUser create a user
func CreateUser(ctx *context.APIContext, form api.CreateUserOption) {
	// swagger:operation POST /admin/users admin adminCreateUser
	// ---
	// summary: Create a user
	// consumes:
	// - application/json
	// produces:
	// - application/json
	// parameters:
	// - name: body
	//   in: body
	//   schema:
	//     "$ref": "#/definitions/CreateUserOption"
	// responses:
	//   "201":
	//     "$ref": "#/responses/User"
	//   "403":
	//     "$ref": "#/responses/forbidden"
	//   "422":
	//     "$ref": "#/responses/validationError"
	u := &models.User{
		Name:      form.Username,
		FullName:  form.FullName,
		Email:     form.Email,
		Passwd:    form.Password,
		IsActive:  true,
		LoginType: models.LoginPlain,
	}

	parseLoginSource(ctx, u, form.SourceID, form.LoginName)
	if ctx.Written() {
		return
	}

	if err := models.CreateUser(u); err != nil {
		if models.IsErrUserAlreadyExist(err) ||
			models.IsErrEmailAlreadyUsed(err) ||
			models.IsErrNameReserved(err) ||
			models.IsErrNamePatternNotAllowed(err) {
			ctx.Error(422, "", err)
		} else {
			ctx.Error(500, "CreateUser", err)
		}
		return
	}
	log.Trace("Account created by admin (%s): %s", ctx.User.Name, u.Name)

	// Send email notification.
	if form.SendNotify && setting.MailService != nil {
		models.SendRegisterNotifyMail(ctx.Context.Context, u)
	}

	ctx.JSON(201, u.APIFormat())
}

// EditUser api for modifying a user's information
func EditUser(ctx *context.APIContext, form api.EditUserOption) {
	// swagger:operation PATCH /admin/users/{username} admin adminEditUser
	// ---
	// summary: Edit an existing user
	// consumes:
	// - application/json
	// produces:
	// - application/json
	// parameters:
	// - name: username
	//   in: path
	//   description: username of user to edit
	//   type: string
	//   required: true
	// - name: body
	//   in: body
	//   schema:
	//     "$ref": "#/definitions/EditUserOption"
	// responses:
	//   "200":
	//     "$ref": "#/responses/User"
	//   "403":
	//     "$ref": "#/responses/forbidden"
	//   "422":
	//     "$ref": "#/responses/validationError"
	u := user.GetUserByParams(ctx)
	if ctx.Written() {
		return
	}

	parseLoginSource(ctx, u, form.SourceID, form.LoginName)
	if ctx.Written() {
		return
	}

	if len(form.Password) > 0 {
		u.Passwd = form.Password
		var err error
		if u.Salt, err = models.GetUserSalt(); err != nil {
			ctx.Error(500, "UpdateUser", err)
			return
		}
		u.EncodePasswd()
	}

	u.LoginName = form.LoginName
	u.FullName = form.FullName
	u.Email = form.Email
	u.Website = form.Website
	u.Location = form.Location
	if form.Active != nil {
		u.IsActive = *form.Active
	}
	if form.Admin != nil {
		u.IsAdmin = *form.Admin
	}
	if form.AllowGitHook != nil {
		u.AllowGitHook = *form.AllowGitHook
	}
	if form.AllowImportLocal != nil {
		u.AllowImportLocal = *form.AllowImportLocal
	}
	if form.MaxRepoCreation != nil {
		u.MaxRepoCreation = *form.MaxRepoCreation
	}

	if err := models.UpdateUser(u); err != nil {
		if models.IsErrEmailAlreadyUsed(err) {
			ctx.Error(422, "", err)
		} else {
			ctx.Error(500, "UpdateUser", err)
		}
		return
	}
	log.Trace("Account profile updated by admin (%s): %s", ctx.User.Name, u.Name)

	ctx.JSON(200, u.APIFormat())
}

// DeleteUser api for deleting a user
func DeleteUser(ctx *context.APIContext) {
	// swagger:operation DELETE /admin/users/{username} admin adminDeleteUser
	// ---
	// summary: Delete a user
	// produces:
	// - application/json
	// parameters:
	// - name: username
	//   in: path
	//   description: username of user to delete
	//   type: string
	//   required: true
	// responses:
	//   "204":
	//     "$ref": "#/responses/empty"
	//   "403":
	//     "$ref": "#/responses/forbidden"
	//   "422":
	//     "$ref": "#/responses/validationError"
	u := user.GetUserByParams(ctx)
	if ctx.Written() {
		return
	}

	if err := models.DeleteUser(u); err != nil {
		if models.IsErrUserOwnRepos(err) ||
			models.IsErrUserHasOrgs(err) {
			ctx.Error(422, "", err)
		} else {
			ctx.Error(500, "DeleteUser", err)
		}
		return
	}
	log.Trace("Account deleted by admin(%s): %s", ctx.User.Name, u.Name)

	ctx.Status(204)
}

// CreatePublicKey api for creating a public key to a user
func CreatePublicKey(ctx *context.APIContext, form api.CreateKeyOption) {
	// swagger:operation POST /admin/users/{username}/keys admin adminCreatePublicKey
	// ---
	// summary: Add a public key on behalf of a user
	// consumes:
	// - application/json
	// produces:
	// - application/json
	// parameters:
	// - name: username
	//   in: path
	//   description: username of the user
	//   type: string
	//   required: true
	// responses:
	//   "201":
	//     "$ref": "#/responses/PublicKey"
	//   "403":
	//     "$ref": "#/responses/forbidden"
	//   "422":
	//     "$ref": "#/responses/validationError"
	u := user.GetUserByParams(ctx)
	if ctx.Written() {
		return
	}
	user.CreateUserPublicKey(ctx, form, u.ID)
}