// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2018 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package org

import (
	gocontext "context"
	"errors"
	"fmt"
	"net/http"

	activities_model "gitea.dev/models/activities"
	"gitea.dev/models/db"
	"gitea.dev/models/organization"
	"gitea.dev/models/perm"
	repo_model "gitea.dev/models/repo"
	system_model "gitea.dev/models/system"
	user_model "gitea.dev/models/user"
	"gitea.dev/modules/graceful"
	"gitea.dev/modules/log"
	"gitea.dev/modules/optional"
	api "gitea.dev/modules/structs"
	"gitea.dev/modules/util"
	"gitea.dev/modules/web"
	"gitea.dev/routers/api/v1/user"
	"gitea.dev/routers/api/v1/utils"
	"gitea.dev/services/context"
	"gitea.dev/services/convert"
	feed_service "gitea.dev/services/feed"
	"gitea.dev/services/org"
	repo_service "gitea.dev/services/repository"
	user_service "gitea.dev/services/user"
)

func listUserOrgs(ctx *context.APIContext, u *user_model.User) {
	listOptions := utils.GetListOptions(ctx)
	opts := organization.FindOrgOptions{
		ListOptions:       listOptions,
		UserID:            u.ID,
		IncludeVisibility: organization.DoerViewOtherVisibility(ctx.Doer, u),
	}
	opts.ApplyPublicOnly(ctx.PublicOnly)
	orgs, maxResults, err := db.FindAndCount[organization.Organization](ctx, opts)
	if err != nil {
		ctx.APIErrorInternal(err)
		return
	}

	apiOrgs := make([]*api.Organization, len(orgs))
	for i := range orgs {
		apiOrgs[i] = convert.ToOrganization(ctx, orgs[i])
	}

	ctx.SetLinkHeader(maxResults, listOptions.PageSize)
	ctx.SetTotalCountHeader(maxResults)
	ctx.JSON(http.StatusOK, &apiOrgs)
}

// ListMyOrgs list all my orgs
func ListMyOrgs(ctx *context.APIContext) {
	// swagger:operation GET /user/orgs organization orgListCurrentUserOrgs
	// ---
	// summary: List the current user's organizations
	// produces:
	// - application/json
	// parameters:
	// - name: page
	//   in: query
	//   description: page number of results to return (1-based)
	//   type: integer
	// - name: limit
	//   in: query
	//   description: page size of results
	//   type: integer
	// responses:
	//   "200":
	//     "$ref": "#/responses/OrganizationList"
	//   "404":
	//     "$ref": "#/responses/notFound"

	listUserOrgs(ctx, ctx.Doer)
}

// ListUserOrgs list user's orgs
func ListUserOrgs(ctx *context.APIContext) {
	// swagger:operation GET /users/{username}/orgs organization orgListUserOrgs
	// ---
	// summary: List a user's organizations
	// produces:
	// - application/json
	// parameters:
	// - name: username
	//   in: path
	//   description: username of the user whose organizations are to be listed
	//   type: string
	//   required: true
	// - name: page
	//   in: query
	//   description: page number of results to return (1-based)
	//   type: integer
	// - name: limit
	//   in: query
	//   description: page size of results
	//   type: integer
	// responses:
	//   "200":
	//     "$ref": "#/responses/OrganizationList"
	//   "404":
	//     "$ref": "#/responses/notFound"

	listUserOrgs(ctx, ctx.ContextUser)
}

// GetUserOrgsPermissions get user permissions in organization
func GetUserOrgsPermissions(ctx *context.APIContext) {
	// swagger:operation GET /users/{username}/orgs/{org}/permissions organization orgGetUserPermissions
	// ---
	// summary: Get user permissions in organization
	// produces:
	// - application/json
	// parameters:
	// - name: username
	//   in: path
	//   description: username of the user whose permissions are to be obtained
	//   type: string
	//   required: true
	// - name: org
	//   in: path
	//   description: name of the organization
	//   type: string
	//   required: true
	// responses:
	//   "200":
	//     "$ref": "#/responses/OrganizationPermissions"
	//   "403":
	//     "$ref": "#/responses/forbidden"
	//   "404":
	//     "$ref": "#/responses/notFound"

	var o *user_model.User
	if o = user.GetUserByPathParam(ctx, "org"); o == nil {
		return
	}

	op := api.OrganizationPermissions{}

	if !organization.HasOrgOrUserVisible(ctx, o, ctx.Doer) {
		ctx.APIErrorNotFound("HasOrgOrUserVisible", nil)
		return
	}

	org := organization.OrgFromUser(o)
	authorizeLevel, err := org.GetOrgUserMaxAuthorizeLevel(ctx, ctx.ContextUser.ID)
	if err != nil {
		ctx.APIErrorInternal(err)
		return
	}

	if authorizeLevel > perm.AccessModeNone {
		op.CanRead = true
	}
	if authorizeLevel > perm.AccessModeRead {
		op.CanWrite = true
	}
	if authorizeLevel > perm.AccessModeWrite {
		op.IsAdmin = true
	}
	if authorizeLevel > perm.AccessModeAdmin {
		op.IsOwner = true
	}

	op.CanCreateRepository, err = org.CanCreateOrgRepo(ctx, ctx.ContextUser.ID)
	if err != nil {
		ctx.APIErrorInternal(err)
		return
	}

	ctx.JSON(http.StatusOK, op)
}

// GetAll return list of all public organizations
func GetAll(ctx *context.APIContext) {
	// swagger:operation Get /orgs organization orgGetAll
	// ---
	// summary: Get list of organizations
	// produces:
	// - application/json
	// parameters:
	// - name: page
	//   in: query
	//   description: page number of results to return (1-based)
	//   type: integer
	// - name: limit
	//   in: query
	//   description: page size of results
	//   type: integer
	// responses:
	//   "200":
	//     "$ref": "#/responses/OrganizationList"

	vMode := []api.VisibleType{api.VisibleTypePublic}
	if ctx.IsSigned {
		vMode = append(vMode, api.VisibleTypeLimited)
		if ctx.Doer.IsAdmin {
			vMode = append(vMode, api.VisibleTypePrivate)
		}
	}

	listOptions := utils.GetListOptions(ctx)

	searchOpts := user_model.SearchUserOptions{
		Actor:       ctx.Doer,
		ListOptions: listOptions,
		Types:       []user_model.UserType{user_model.UserTypeOrganization},
		OrderBy:     db.SearchOrderByAlphabetically,
		Visible:     vMode,
	}
	searchOpts.ApplyPublicOnly(ctx.PublicOnly)

	publicOrgs, maxResults, err := user_model.SearchUsers(ctx, searchOpts)
	if err != nil {
		ctx.APIErrorInternal(err)
		return
	}
	orgs := make([]*api.Organization, len(publicOrgs))
	for i := range publicOrgs {
		orgs[i] = convert.ToOrganization(ctx, organization.OrgFromUser(publicOrgs[i]))
	}

	ctx.SetLinkHeader(maxResults, listOptions.PageSize)
	ctx.SetTotalCountHeader(maxResults)
	ctx.JSON(http.StatusOK, &orgs)
}

// Create api for create organization
func Create(ctx *context.APIContext) {
	// swagger:operation POST /orgs organization orgCreate
	// ---
	// summary: Create an organization
	// consumes:
	// - application/json
	// produces:
	// - application/json
	// parameters:
	// - name: organization
	//   in: body
	//   required: true
	//   schema: { "$ref": "#/definitions/CreateOrgOption" }
	// responses:
	//   "201":
	//     "$ref": "#/responses/Organization"
	//   "403":
	//     "$ref": "#/responses/forbidden"
	//   "422":
	//     "$ref": "#/responses/validationError"
	form := web.GetForm(ctx).(*api.CreateOrgOption)
	if !ctx.Doer.CanCreateOrganization() {
		ctx.APIError(http.StatusForbidden, nil)
		return
	}

	visibility := api.VisibleTypePublic
	if form.Visibility != "" {
		visibility = api.VisibilityModes[string(form.Visibility)]
	}

	org := &organization.Organization{
		Name:                      form.UserName,
		FullName:                  form.FullName,
		Email:                     form.Email,
		Description:               form.Description,
		Website:                   form.Website,
		Location:                  form.Location,
		IsActive:                  true,
		Type:                      user_model.UserTypeOrganization,
		Visibility:                visibility,
		RepoAdminChangeTeamAccess: form.RepoAdminChangeTeamAccess,
	}
	if err := organization.CreateOrganization(ctx, org, ctx.Doer); err != nil {
		if user_model.IsErrUserAlreadyExist(err) ||
			db.IsErrNameReserved(err) ||
			db.IsErrNameCharsNotAllowed(err) ||
			db.IsErrNamePatternNotAllowed(err) {
			ctx.APIError(http.StatusUnprocessableEntity, err)
		} else {
			ctx.APIErrorInternal(err)
		}
		return
	}

	ctx.JSON(http.StatusCreated, convert.ToOrganization(ctx, org))
}

// Get get an organization
func Get(ctx *context.APIContext) {
	// swagger:operation GET /orgs/{org} organization orgGet
	// ---
	// summary: Get an organization
	// produces:
	// - application/json
	// parameters:
	// - name: org
	//   in: path
	//   description: name of the organization to get
	//   type: string
	//   required: true
	// responses:
	//   "200":
	//     "$ref": "#/responses/Organization"
	//   "404":
	//     "$ref": "#/responses/notFound"

	if !organization.HasOrgOrUserVisible(ctx, ctx.Org.Organization.AsUser(), ctx.Doer) {
		ctx.APIErrorNotFound("HasOrgOrUserVisible", nil)
		return
	}

	org := convert.ToOrganization(ctx, ctx.Org.Organization)

	// Don't show Mail, when User is not logged in
	if ctx.Doer == nil {
		org.Email = ""
	}

	ctx.JSON(http.StatusOK, org)
}

func Rename(ctx *context.APIContext) {
	// swagger:operation POST /orgs/{org}/rename organization renameOrg
	// ---
	// summary: Rename an organization
	// produces:
	// - application/json
	// parameters:
	// - name: org
	//   in: path
	//   description: existing org name
	//   type: string
	//   required: true
	// - name: body
	//   in: body
	//   required: true
	//   schema:
	//     "$ref": "#/definitions/RenameOrgOption"
	// responses:
	//   "204":
	//     "$ref": "#/responses/empty"
	//   "403":
	//     "$ref": "#/responses/forbidden"
	//   "422":
	//     "$ref": "#/responses/validationError"

	form := web.GetForm(ctx).(*api.RenameOrgOption)
	orgUser := ctx.Org.Organization.AsUser()
	if err := user_service.RenameUser(ctx, orgUser, form.NewName, ctx.Doer); err != nil {
		if user_model.IsErrUserAlreadyExist(err) || db.IsErrNameReserved(err) || db.IsErrNamePatternNotAllowed(err) || db.IsErrNameCharsNotAllowed(err) {
			ctx.APIError(http.StatusUnprocessableEntity, err)
		} else {
			ctx.APIErrorInternal(err)
		}
		return
	}
	ctx.Status(http.StatusNoContent)
}

// Edit change an organization's information
func Edit(ctx *context.APIContext) {
	// swagger:operation PATCH /orgs/{org} organization orgEdit
	// ---
	// summary: Edit an organization
	// consumes:
	// - application/json
	// produces:
	// - application/json
	// parameters:
	// - name: org
	//   in: path
	//   description: name of the organization to edit
	//   type: string
	//   required: true
	// - name: body
	//   in: body
	//   required: true
	//   schema:
	//     "$ref": "#/definitions/EditOrgOption"
	// responses:
	//   "200":
	//     "$ref": "#/responses/Organization"
	//   "404":
	//     "$ref": "#/responses/notFound"

	form := web.GetForm(ctx).(*api.EditOrgOption)

	if err := org.UpdateOrgEmailAddress(ctx, ctx.Org.Organization, form.Email); err != nil {
		if errors.Is(err, util.ErrInvalidArgument) {
			ctx.APIError(http.StatusUnprocessableEntity, err)
			return
		}
		ctx.APIErrorInternal(err)
		return
	}

	opts := &user_service.UpdateOptions{
		FullName:                  optional.FromPtr(form.FullName),
		Description:               optional.FromPtr(form.Description),
		Website:                   optional.FromPtr(form.Website),
		Location:                  optional.FromPtr(form.Location),
		Visibility:                optional.FromMapLookup(api.VisibilityModes, string(optional.FromPtr(form.Visibility).Value())),
		RepoAdminChangeTeamAccess: optional.FromPtr(form.RepoAdminChangeTeamAccess),
	}
	if err := user_service.UpdateUser(ctx, ctx.Org.Organization.AsUser(), opts); err != nil {
		ctx.APIErrorInternal(err)
		return
	}

	ctx.JSON(http.StatusOK, convert.ToOrganization(ctx, ctx.Org.Organization))
}

// Delete an organization
func Delete(ctx *context.APIContext) {
	// swagger:operation DELETE /orgs/{org} organization orgDelete
	// ---
	// summary: Delete an organization
	// produces:
	// - application/json
	// parameters:
	// - name: org
	//   in: path
	//   description: organization that is to be deleted
	//   type: string
	//   required: true
	// responses:
	//   "204":
	//     "$ref": "#/responses/empty"
	//   "404":
	//     "$ref": "#/responses/notFound"

	if err := org.DeleteOrganization(ctx, ctx.Org.Organization, false); err != nil {
		ctx.APIErrorInternal(err)
		return
	}
	ctx.Status(http.StatusNoContent)
}

func ListOrgActivityFeeds(ctx *context.APIContext) {
	// swagger:operation GET /orgs/{org}/activities/feeds organization orgListActivityFeeds
	// ---
	// summary: List an organization's activity feeds
	// produces:
	// - application/json
	// parameters:
	// - name: org
	//   in: path
	//   description: name of the org
	//   type: string
	//   required: true
	// - name: date
	//   in: query
	//   description: the date of the activities to be found
	//   type: string
	//   format: date
	// - name: page
	//   in: query
	//   description: page number of results to return (1-based)
	//   type: integer
	// - name: limit
	//   in: query
	//   description: page size of results
	//   type: integer
	// responses:
	//   "200":
	//     "$ref": "#/responses/ActivityFeedsList"
	//   "404":
	//     "$ref": "#/responses/notFound"

	includePrivate := false
	if ctx.IsSigned {
		if ctx.Doer.IsAdmin {
			includePrivate = true
		} else {
			org := organization.OrgFromUser(ctx.ContextUser)
			isMember, err := org.IsOrgMember(ctx, ctx.Doer.ID)
			if err != nil {
				ctx.APIErrorInternal(err)
				return
			}
			includePrivate = isMember
		}
	}

	listOptions := utils.GetListOptions(ctx)

	opts := activities_model.GetFeedsOptions{
		RequestedUser:  ctx.ContextUser,
		Actor:          ctx.Doer,
		IncludePrivate: includePrivate,
		Date:           ctx.FormString("date"),
		ListOptions:    listOptions,
	}
	opts.ApplyPublicOnly(ctx.PublicOnly)

	feeds, count, err := feed_service.GetFeeds(ctx, opts)
	if err != nil {
		ctx.APIErrorInternal(err)
		return
	}
	ctx.SetTotalCountHeader(count)

	ctx.JSON(http.StatusOK, convert.ToActivities(ctx, feeds, ctx.Doer))
}

func deleteOrgReposBackground(ctx gocontext.Context, org *organization.Organization, repoIDs []int64, doer *user_model.User) {
	defer func() {
		if r := recover(); r != nil {
			log.Error("panic during org repo deletion: %v, stack: %v", r, log.Stack(2))
		}
	}()

	for _, repoID := range repoIDs {
		repo, err := repo_model.GetRepositoryByID(ctx, repoID)
		if err != nil {
			desc := fmt.Sprintf("Failed to get repository ID %d in org %s: %v", repoID, org.Name, err)
			_ = system_model.CreateNotice(ctx, system_model.NoticeRepository, desc)
			log.Error("GetRepositoryByID failed: %v", desc)
			continue
		}
		if err := repo_service.DeleteRepository(ctx, doer, repo, true); err != nil {
			desc := fmt.Sprintf("Failed to delete repository %s (ID: %d) in org %s: %v", repo.Name, repo.ID, org.Name, err)
			_ = system_model.CreateNotice(ctx, system_model.NoticeRepository, desc)
			log.Error("DeleteRepository failed: %v", desc)
			continue
		}
		log.Info("Successfully deleted repository %s (ID: %d) in org %s", repo.Name, repo.ID, org.Name)
	}
	log.Info("Completed deletion of repositories in org %s", org.Name)
}

func DeleteOrgRepos(ctx *context.APIContext) {
	// swagger:operation DELETE /orgs/{org}/repos organization orgDeleteRepos
	// ---
	// summary: Delete all repositories in an organization
	// produces:
	// - application/json
	// parameters:
	// - name: org
	//   in: path
	//   description: name of the organization
	//   type: string
	//   required: true
	// responses:
	//   "202":
	//     "$ref": "#/responses/empty"
	//   "204":
	//     "$ref": "#/responses/empty"
	//   "403":
	//     "$ref": "#/responses/forbidden"
	//   "404":
	//     "$ref": "#/responses/notFound"

	// Intentionally it only loads repository IDs to avoid loading too much data into memory
	// There is no need to do pagination here as the number of repositories is expected to be manageable
	repoIDs, err := repo_model.GetOrgRepositoryIDs(ctx, ctx.Org.Organization.ID)
	if err != nil {
		ctx.APIErrorInternal(err)
		return
	}

	if len(repoIDs) == 0 {
		ctx.Status(http.StatusNoContent)
		return
	}

	// Start deletion (slow) in background with detached context, so it can continue even if the request is canceled
	go deleteOrgReposBackground(graceful.GetManager().ShutdownContext(), ctx.Org.Organization, repoIDs, ctx.Doer)

	ctx.Status(http.StatusAccepted)
}
