// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2018 The Gitea 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 repo

import (
	"strings"
	"time"

	"code.gitea.io/git"

	"code.gitea.io/gitea/models"
	"code.gitea.io/gitea/modules/auth"
	"code.gitea.io/gitea/modules/base"
	"code.gitea.io/gitea/modules/context"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/modules/util"
	"code.gitea.io/gitea/modules/validation"
	"code.gitea.io/gitea/routers/utils"
)

const (
	tplSettingsOptions base.TplName = "repo/settings/options"
	tplCollaboration   base.TplName = "repo/settings/collaboration"
	tplBranches        base.TplName = "repo/settings/branches"
	tplGithooks        base.TplName = "repo/settings/githooks"
	tplGithookEdit     base.TplName = "repo/settings/githook_edit"
	tplDeployKeys      base.TplName = "repo/settings/deploy_keys"
	tplProtectedBranch base.TplName = "repo/settings/protected_branch"
)

// Settings show a repository's settings page
func Settings(ctx *context.Context) {
	ctx.Data["Title"] = ctx.Tr("repo.settings")
	ctx.Data["PageIsSettingsOptions"] = true
	ctx.HTML(200, tplSettingsOptions)
}

// SettingsPost response for changes of a repository
func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
	ctx.Data["Title"] = ctx.Tr("repo.settings")
	ctx.Data["PageIsSettingsOptions"] = true

	repo := ctx.Repo.Repository

	switch ctx.Query("action") {
	case "update":
		if ctx.HasError() {
			ctx.HTML(200, tplSettingsOptions)
			return
		}

		isNameChanged := false
		oldRepoName := repo.Name
		newRepoName := form.RepoName
		// Check if repository name has been changed.
		if repo.LowerName != strings.ToLower(newRepoName) {
			isNameChanged = true
			if err := models.ChangeRepositoryName(ctx.Repo.Owner, repo.Name, newRepoName); err != nil {
				ctx.Data["Err_RepoName"] = true
				switch {
				case models.IsErrRepoAlreadyExist(err):
					ctx.RenderWithErr(ctx.Tr("form.repo_name_been_taken"), tplSettingsOptions, &form)
				case models.IsErrNameReserved(err):
					ctx.RenderWithErr(ctx.Tr("repo.form.name_reserved", err.(models.ErrNameReserved).Name), tplSettingsOptions, &form)
				case models.IsErrNamePatternNotAllowed(err):
					ctx.RenderWithErr(ctx.Tr("repo.form.name_pattern_not_allowed", err.(models.ErrNamePatternNotAllowed).Pattern), tplSettingsOptions, &form)
				default:
					ctx.ServerError("ChangeRepositoryName", err)
				}
				return
			}

			err := models.NewRepoRedirect(ctx.Repo.Owner.ID, repo.ID, repo.Name, newRepoName)
			if err != nil {
				ctx.ServerError("NewRepoRedirect", err)
				return
			}

			log.Trace("Repository name changed: %s/%s -> %s", ctx.Repo.Owner.Name, repo.Name, newRepoName)
		}
		// In case it's just a case change.
		repo.Name = newRepoName
		repo.LowerName = strings.ToLower(newRepoName)
		repo.Description = form.Description
		repo.Website = form.Website

		// Visibility of forked repository is forced sync with base repository.
		if repo.IsFork {
			form.Private = repo.BaseRepo.IsPrivate
		}

		visibilityChanged := repo.IsPrivate != form.Private
		repo.IsPrivate = form.Private
		if err := models.UpdateRepository(repo, visibilityChanged); err != nil {
			ctx.ServerError("UpdateRepository", err)
			return
		}
		log.Trace("Repository basic settings updated: %s/%s", ctx.Repo.Owner.Name, repo.Name)

		if isNameChanged {
			if err := models.RenameRepoAction(ctx.User, oldRepoName, repo); err != nil {
				log.Error(4, "RenameRepoAction: %v", err)
			}
		}

		ctx.Flash.Success(ctx.Tr("repo.settings.update_settings_success"))
		ctx.Redirect(repo.Link() + "/settings")

	case "mirror":
		if !repo.IsMirror {
			ctx.NotFound("", nil)
			return
		}

		interval, err := time.ParseDuration(form.Interval)
		if err != nil || interval < setting.Mirror.MinInterval {
			ctx.RenderWithErr(ctx.Tr("repo.mirror_interval_invalid"), tplSettingsOptions, &form)
		} else {
			ctx.Repo.Mirror.EnablePrune = form.EnablePrune
			ctx.Repo.Mirror.Interval = interval
			ctx.Repo.Mirror.NextUpdateUnix = util.TimeStampNow().AddDuration(interval)
			if err := models.UpdateMirror(ctx.Repo.Mirror); err != nil {
				ctx.RenderWithErr(ctx.Tr("repo.mirror_interval_invalid"), tplSettingsOptions, &form)
				return
			}
		}
		if err := ctx.Repo.Mirror.SaveAddress(form.MirrorAddress); err != nil {
			ctx.ServerError("SaveAddress", err)
			return
		}

		ctx.Flash.Success(ctx.Tr("repo.settings.update_settings_success"))
		ctx.Redirect(repo.Link() + "/settings")

	case "mirror-sync":
		if !repo.IsMirror {
			ctx.NotFound("", nil)
			return
		}

		go models.MirrorQueue.Add(repo.ID)
		ctx.Flash.Info(ctx.Tr("repo.settings.mirror_sync_in_progress"))
		ctx.Redirect(repo.Link() + "/settings")

	case "advanced":
		var units []models.RepoUnit

		for _, tp := range models.MustRepoUnits {
			units = append(units, models.RepoUnit{
				RepoID: repo.ID,
				Type:   tp,
				Config: new(models.UnitConfig),
			})
		}

		if form.EnableWiki {
			if form.EnableExternalWiki {
				if !validation.IsValidExternalURL(form.ExternalWikiURL) {
					ctx.Flash.Error(ctx.Tr("repo.settings.external_wiki_url_error"))
					ctx.Redirect(repo.Link() + "/settings")
					return
				}

				units = append(units, models.RepoUnit{
					RepoID: repo.ID,
					Type:   models.UnitTypeExternalWiki,
					Config: &models.ExternalWikiConfig{
						ExternalWikiURL: form.ExternalWikiURL,
					},
				})
			} else {
				units = append(units, models.RepoUnit{
					RepoID: repo.ID,
					Type:   models.UnitTypeWiki,
					Config: new(models.UnitConfig),
				})
			}
		}

		if form.EnableIssues {
			if form.EnableExternalTracker {
				if !validation.IsValidExternalURL(form.ExternalTrackerURL) {
					ctx.Flash.Error(ctx.Tr("repo.settings.external_tracker_url_error"))
					ctx.Redirect(repo.Link() + "/settings")
					return
				}
				if len(form.TrackerURLFormat) != 0 && !validation.IsValidExternalURL(form.TrackerURLFormat) {
					ctx.Flash.Error(ctx.Tr("repo.settings.tracker_url_format_error"))
					ctx.Redirect(repo.Link() + "/settings")
					return
				}
				units = append(units, models.RepoUnit{
					RepoID: repo.ID,
					Type:   models.UnitTypeExternalTracker,
					Config: &models.ExternalTrackerConfig{
						ExternalTrackerURL:    form.ExternalTrackerURL,
						ExternalTrackerFormat: form.TrackerURLFormat,
						ExternalTrackerStyle:  form.TrackerIssueStyle,
					},
				})
			} else {
				units = append(units, models.RepoUnit{
					RepoID: repo.ID,
					Type:   models.UnitTypeIssues,
					Config: &models.IssuesConfig{
						EnableTimetracker:                form.EnableTimetracker,
						AllowOnlyContributorsToTrackTime: form.AllowOnlyContributorsToTrackTime,
					},
				})
			}
		}

		if form.EnablePulls {
			units = append(units, models.RepoUnit{
				RepoID: repo.ID,
				Type:   models.UnitTypePullRequests,
				Config: &models.PullRequestsConfig{
					IgnoreWhitespaceConflicts: form.PullsIgnoreWhitespace,
					AllowMerge:                form.PullsAllowMerge,
					AllowRebase:               form.PullsAllowRebase,
					AllowSquash:               form.PullsAllowSquash,
				},
			})
		}

		if err := models.UpdateRepositoryUnits(repo, units); err != nil {
			ctx.ServerError("UpdateRepositoryUnits", err)
			return
		}
		log.Trace("Repository advanced settings updated: %s/%s", ctx.Repo.Owner.Name, repo.Name)

		ctx.Flash.Success(ctx.Tr("repo.settings.update_settings_success"))
		ctx.Redirect(ctx.Repo.RepoLink + "/settings")

	case "admin":
		if !ctx.User.IsAdmin {
			ctx.Error(403)
			return
		}

		if repo.IsFsckEnabled != form.EnableHealthCheck {
			repo.IsFsckEnabled = form.EnableHealthCheck
			if err := models.UpdateRepository(repo, false); err != nil {
				ctx.ServerError("UpdateRepository", err)
				return
			}
			log.Trace("Repository admin settings updated: %s/%s", ctx.Repo.Owner.Name, repo.Name)
		}

		ctx.Flash.Success(ctx.Tr("repo.settings.update_settings_success"))
		ctx.Redirect(ctx.Repo.RepoLink + "/settings")

	case "convert":
		if !ctx.Repo.IsOwner() {
			ctx.Error(404)
			return
		}
		if repo.Name != form.RepoName {
			ctx.RenderWithErr(ctx.Tr("form.enterred_invalid_repo_name"), tplSettingsOptions, nil)
			return
		}

		if !repo.IsMirror {
			ctx.Error(404)
			return
		}
		repo.IsMirror = false

		if _, err := models.CleanUpMigrateInfo(repo); err != nil {
			ctx.ServerError("CleanUpMigrateInfo", err)
			return
		} else if err = models.DeleteMirrorByRepoID(ctx.Repo.Repository.ID); err != nil {
			ctx.ServerError("DeleteMirrorByRepoID", err)
			return
		}
		log.Trace("Repository converted from mirror to regular: %s/%s", ctx.Repo.Owner.Name, repo.Name)
		ctx.Flash.Success(ctx.Tr("repo.settings.convert_succeed"))
		ctx.Redirect(setting.AppSubURL + "/" + ctx.Repo.Owner.Name + "/" + repo.Name)

	case "transfer":
		if !ctx.Repo.IsOwner() {
			ctx.Error(404)
			return
		}
		if repo.Name != form.RepoName {
			ctx.RenderWithErr(ctx.Tr("form.enterred_invalid_repo_name"), tplSettingsOptions, nil)
			return
		}

		newOwner := ctx.Query("new_owner_name")
		isExist, err := models.IsUserExist(0, newOwner)
		if err != nil {
			ctx.ServerError("IsUserExist", err)
			return
		} else if !isExist {
			ctx.RenderWithErr(ctx.Tr("form.enterred_invalid_owner_name"), tplSettingsOptions, nil)
			return
		}

		if err = models.TransferOwnership(ctx.User, newOwner, repo); err != nil {
			if models.IsErrRepoAlreadyExist(err) {
				ctx.RenderWithErr(ctx.Tr("repo.settings.new_owner_has_same_repo"), tplSettingsOptions, nil)
			} else {
				ctx.ServerError("TransferOwnership", err)
			}
			return
		}
		log.Trace("Repository transferred: %s/%s -> %s", ctx.Repo.Owner.Name, repo.Name, newOwner)
		ctx.Flash.Success(ctx.Tr("repo.settings.transfer_succeed"))
		ctx.Redirect(setting.AppSubURL + "/" + newOwner + "/" + repo.Name)

	case "delete":
		if !ctx.Repo.IsOwner() {
			ctx.Error(404)
			return
		}
		if repo.Name != form.RepoName {
			ctx.RenderWithErr(ctx.Tr("form.enterred_invalid_repo_name"), tplSettingsOptions, nil)
			return
		}

		if err := models.DeleteRepository(ctx.User, ctx.Repo.Owner.ID, repo.ID); err != nil {
			ctx.ServerError("DeleteRepository", err)
			return
		}
		log.Trace("Repository deleted: %s/%s", ctx.Repo.Owner.Name, repo.Name)

		ctx.Flash.Success(ctx.Tr("repo.settings.deletion_success"))
		ctx.Redirect(ctx.Repo.Owner.DashboardLink())

	case "delete-wiki":
		if !ctx.Repo.IsOwner() {
			ctx.Error(404)
			return
		}
		if repo.Name != form.RepoName {
			ctx.RenderWithErr(ctx.Tr("form.enterred_invalid_repo_name"), tplSettingsOptions, nil)
			return
		}

		repo.DeleteWiki()
		log.Trace("Repository wiki deleted: %s/%s", ctx.Repo.Owner.Name, repo.Name)

		ctx.Flash.Success(ctx.Tr("repo.settings.wiki_deletion_success"))
		ctx.Redirect(ctx.Repo.RepoLink + "/settings")

	default:
		ctx.NotFound("", nil)
	}
}

// Collaboration render a repository's collaboration page
func Collaboration(ctx *context.Context) {
	ctx.Data["Title"] = ctx.Tr("repo.settings")
	ctx.Data["PageIsSettingsCollaboration"] = true

	users, err := ctx.Repo.Repository.GetCollaborators()
	if err != nil {
		ctx.ServerError("GetCollaborators", err)
		return
	}
	ctx.Data["Collaborators"] = users

	ctx.HTML(200, tplCollaboration)
}

// CollaborationPost response for actions for a collaboration of a repository
func CollaborationPost(ctx *context.Context) {
	name := utils.RemoveUsernameParameterSuffix(strings.ToLower(ctx.Query("collaborator")))
	if len(name) == 0 || ctx.Repo.Owner.LowerName == name {
		ctx.Redirect(setting.AppSubURL + ctx.Req.URL.Path)
		return
	}

	u, err := models.GetUserByName(name)
	if err != nil {
		if models.IsErrUserNotExist(err) {
			ctx.Flash.Error(ctx.Tr("form.user_not_exist"))
			ctx.Redirect(setting.AppSubURL + ctx.Req.URL.Path)
		} else {
			ctx.ServerError("GetUserByName", err)
		}
		return
	}

	// Organization is not allowed to be added as a collaborator.
	if u.IsOrganization() {
		ctx.Flash.Error(ctx.Tr("repo.settings.org_not_allowed_to_be_collaborator"))
		ctx.Redirect(setting.AppSubURL + ctx.Req.URL.Path)
		return
	}

	// Check if user is organization member.
	if ctx.Repo.Owner.IsOrganization() {
		isMember, err := ctx.Repo.Owner.IsOrgMember(u.ID)
		if err != nil {
			ctx.ServerError("IsOrgMember", err)
			return
		} else if isMember {
			ctx.Flash.Info(ctx.Tr("repo.settings.user_is_org_member"))
			ctx.Redirect(ctx.Repo.RepoLink + "/settings/collaboration")
			return
		}
	}

	if err = ctx.Repo.Repository.AddCollaborator(u); err != nil {
		ctx.ServerError("AddCollaborator", err)
		return
	}

	if setting.Service.EnableNotifyMail {
		models.SendCollaboratorMail(u, ctx.User, ctx.Repo.Repository)
	}

	ctx.Flash.Success(ctx.Tr("repo.settings.add_collaborator_success"))
	ctx.Redirect(setting.AppSubURL + ctx.Req.URL.Path)
}

// ChangeCollaborationAccessMode response for changing access of a collaboration
func ChangeCollaborationAccessMode(ctx *context.Context) {
	if err := ctx.Repo.Repository.ChangeCollaborationAccessMode(
		ctx.QueryInt64("uid"),
		models.AccessMode(ctx.QueryInt("mode"))); err != nil {
		log.Error(4, "ChangeCollaborationAccessMode: %v", err)
	}
}

// DeleteCollaboration delete a collaboration for a repository
func DeleteCollaboration(ctx *context.Context) {
	if err := ctx.Repo.Repository.DeleteCollaboration(ctx.QueryInt64("id")); err != nil {
		ctx.Flash.Error("DeleteCollaboration: " + err.Error())
	} else {
		ctx.Flash.Success(ctx.Tr("repo.settings.remove_collaborator_success"))
	}

	ctx.JSON(200, map[string]interface{}{
		"redirect": ctx.Repo.RepoLink + "/settings/collaboration",
	})
}

// parseOwnerAndRepo get repos by owner
func parseOwnerAndRepo(ctx *context.Context) (*models.User, *models.Repository) {
	owner, err := models.GetUserByName(ctx.Params(":username"))
	if err != nil {
		if models.IsErrUserNotExist(err) {
			ctx.NotFound("GetUserByName", err)
		} else {
			ctx.ServerError("GetUserByName", err)
		}
		return nil, nil
	}

	repo, err := models.GetRepositoryByName(owner.ID, ctx.Params(":reponame"))
	if err != nil {
		if models.IsErrRepoNotExist(err) {
			ctx.NotFound("GetRepositoryByName", err)
		} else {
			ctx.ServerError("GetRepositoryByName", err)
		}
		return nil, nil
	}

	return owner, repo
}

// GitHooks hooks of a repository
func GitHooks(ctx *context.Context) {
	ctx.Data["Title"] = ctx.Tr("repo.settings.githooks")
	ctx.Data["PageIsSettingsGitHooks"] = true

	hooks, err := ctx.Repo.GitRepo.Hooks()
	if err != nil {
		ctx.ServerError("Hooks", err)
		return
	}
	ctx.Data["Hooks"] = hooks

	ctx.HTML(200, tplGithooks)
}

// GitHooksEdit render for editing a hook of repository page
func GitHooksEdit(ctx *context.Context) {
	ctx.Data["Title"] = ctx.Tr("repo.settings.githooks")
	ctx.Data["PageIsSettingsGitHooks"] = true

	name := ctx.Params(":name")
	hook, err := ctx.Repo.GitRepo.GetHook(name)
	if err != nil {
		if err == git.ErrNotValidHook {
			ctx.NotFound("GetHook", err)
		} else {
			ctx.ServerError("GetHook", err)
		}
		return
	}
	ctx.Data["Hook"] = hook
	ctx.HTML(200, tplGithookEdit)
}

// GitHooksEditPost response for editing a git hook of a repository
func GitHooksEditPost(ctx *context.Context) {
	name := ctx.Params(":name")
	hook, err := ctx.Repo.GitRepo.GetHook(name)
	if err != nil {
		if err == git.ErrNotValidHook {
			ctx.NotFound("GetHook", err)
		} else {
			ctx.ServerError("GetHook", err)
		}
		return
	}
	hook.Content = ctx.Query("content")
	if err = hook.Update(); err != nil {
		ctx.ServerError("hook.Update", err)
		return
	}
	ctx.Redirect(ctx.Repo.RepoLink + "/settings/hooks/git")
}

// DeployKeys render the deploy keys list of a repository page
func DeployKeys(ctx *context.Context) {
	ctx.Data["Title"] = ctx.Tr("repo.settings.deploy_keys")
	ctx.Data["PageIsSettingsKeys"] = true
	ctx.Data["DisableSSH"] = setting.SSH.Disabled

	keys, err := models.ListDeployKeys(ctx.Repo.Repository.ID)
	if err != nil {
		ctx.ServerError("ListDeployKeys", err)
		return
	}
	ctx.Data["Deploykeys"] = keys

	ctx.HTML(200, tplDeployKeys)
}

// DeployKeysPost response for adding a deploy key of a repository
func DeployKeysPost(ctx *context.Context, form auth.AddKeyForm) {
	ctx.Data["Title"] = ctx.Tr("repo.settings.deploy_keys")
	ctx.Data["PageIsSettingsKeys"] = true

	keys, err := models.ListDeployKeys(ctx.Repo.Repository.ID)
	if err != nil {
		ctx.ServerError("ListDeployKeys", err)
		return
	}
	ctx.Data["Deploykeys"] = keys

	if ctx.HasError() {
		ctx.HTML(200, tplDeployKeys)
		return
	}

	content, err := models.CheckPublicKeyString(form.Content)
	if err != nil {
		if models.IsErrSSHDisabled(err) {
			ctx.Flash.Info(ctx.Tr("settings.ssh_disabled"))
		} else if models.IsErrKeyUnableVerify(err) {
			ctx.Flash.Info(ctx.Tr("form.unable_verify_ssh_key"))
		} else {
			ctx.Data["HasError"] = true
			ctx.Data["Err_Content"] = true
			ctx.Flash.Error(ctx.Tr("form.invalid_ssh_key", err.Error()))
		}
		ctx.Redirect(ctx.Repo.RepoLink + "/settings/keys")
		return
	}

	key, err := models.AddDeployKey(ctx.Repo.Repository.ID, form.Title, content, !form.IsWritable)
	if err != nil {
		ctx.Data["HasError"] = true
		switch {
		case models.IsErrKeyAlreadyExist(err):
			ctx.Data["Err_Content"] = true
			ctx.RenderWithErr(ctx.Tr("repo.settings.key_been_used"), tplDeployKeys, &form)
		case models.IsErrKeyNameAlreadyUsed(err):
			ctx.Data["Err_Title"] = true
			ctx.RenderWithErr(ctx.Tr("repo.settings.key_name_used"), tplDeployKeys, &form)
		default:
			ctx.ServerError("AddDeployKey", err)
		}
		return
	}

	log.Trace("Deploy key added: %d", ctx.Repo.Repository.ID)
	ctx.Flash.Success(ctx.Tr("repo.settings.add_key_success", key.Name))
	ctx.Redirect(ctx.Repo.RepoLink + "/settings/keys")
}

// DeleteDeployKey response for deleting a deploy key
func DeleteDeployKey(ctx *context.Context) {
	if err := models.DeleteDeployKey(ctx.User, ctx.QueryInt64("id")); err != nil {
		ctx.Flash.Error("DeleteDeployKey: " + err.Error())
	} else {
		ctx.Flash.Success(ctx.Tr("repo.settings.deploy_key_deletion_success"))
	}

	ctx.JSON(200, map[string]interface{}{
		"redirect": ctx.Repo.RepoLink + "/settings/keys",
	})
}