package state

import (
	"cmp"
	"context"
	"fmt"
	"net/http"
	"slices"
	"strings"
	"time"

	comatproto "github.com/bluesky-social/indigo/api/atproto"
	"github.com/bluesky-social/indigo/atproto/identity"
	"github.com/bluesky-social/indigo/atproto/syntax"
	lexutil "github.com/bluesky-social/indigo/lex/util"
	"github.com/go-chi/chi/v5"
	"github.com/gorilla/feeds"
	"tangled.org/core/api/tangled"
	"tangled.org/core/appview/cache"
	"tangled.org/core/appview/db"
	"tangled.org/core/appview/middleware"
	"tangled.org/core/appview/models"
	"tangled.org/core/appview/pages"
	"tangled.org/core/appview/pagination"
	"tangled.org/core/appview/searchquery"
	"tangled.org/core/orm"
	"tangled.org/core/xrpc"
)

func (s *State) Profile(w http.ResponseWriter, r *http.Request) {
	tabVal := r.URL.Query().Get("tab")
	switch tabVal {
	case "repos":
		middleware.
			Paginate(http.HandlerFunc(s.reposPage)).
			ServeHTTP(w, r)
	case "followers":
		s.followersPage(w, r)
	case "following":
		s.followingPage(w, r)
	case "starred":
		middleware.
			Paginate(http.HandlerFunc(s.starredPage)).
			ServeHTTP(w, r)
	case "strings":
		s.stringsPage(w, r)
	case "vouches":
		middleware.
			Paginate(http.HandlerFunc(s.vouchesPage)).
			ServeHTTP(w, r)
	default:
		s.profileOverview(w, r)
	}
}

func (s *State) profile(r *http.Request) (*pages.ProfileCard, error) {
	didOrHandle := chi.URLParam(r, "user")
	if didOrHandle == "" {
		return nil, fmt.Errorf("empty DID or handle")
	}

	ident, ok := r.Context().Value("resolvedId").(identity.Identity)
	if !ok {
		return nil, fmt.Errorf("failed to resolve ID")
	}
	did := ident.DID.String()

	profile, err := db.GetProfile(s.db, did)
	if err != nil {
		return nil, fmt.Errorf("failed to get profile: %w", err)
	}

	hasProfile := profile != nil
	if !hasProfile {
		profile = &models.Profile{Did: did}
	}

	repoCount, err := db.CountRepos(s.db, orm.FilterEq("did", did))
	if err != nil {
		return nil, fmt.Errorf("failed to get repo count: %w", err)
	}

	stringCount, err := db.CountStrings(s.db, orm.FilterEq("did", did))
	if err != nil {
		return nil, fmt.Errorf("failed to get string count: %w", err)
	}

	starredCount, err := db.CountStars(s.db, orm.FilterEq("did", did))
	if err != nil {
		return nil, fmt.Errorf("failed to get starred repo count: %w", err)
	}

	followStats, err := db.GetFollowerFollowingCount(s.db, did)
	if err != nil {
		return nil, fmt.Errorf("failed to get follower stats: %w", err)
	}

	loggedInUser := s.oauth.GetMultiAccountUser(r)
	followStatus := models.IsNotFollowing
	var loggedInDid string
	var vouchRelationship *models.VouchRelationship

	if loggedInUser != nil {
		followStatus = db.GetFollowStatus(s.db, loggedInUser.Did, did)
		loggedInDid = loggedInUser.Did
		vouchRelationship, err = db.GetVouchRelationship(s.db, syntax.DID(loggedInUser.Did), syntax.DID(did))
	}

	showPunchcard := s.shouldShowPunchcard(did, loggedInDid)

	var punchcard *models.Punchcard
	if showPunchcard {
		now := time.Now()
		startOfYear := time.Date(now.Year(), 1, 1, 0, 0, 0, 0, time.UTC)
		punchcard, err = db.MakePunchcard(
			s.db,
			orm.FilterEq("did", did),
			orm.FilterGte("date", startOfYear.Format(time.DateOnly)),
			orm.FilterLte("date", now.Format(time.DateOnly)),
		)
		if err != nil {
			return nil, fmt.Errorf("failed to get punchcard for %s: %w", did, err)
		}
	}

	return &pages.ProfileCard{
		UserDid:           did,
		HasProfile:        hasProfile,
		Profile:           profile,
		FollowStatus:      followStatus,
		VouchRelationship: vouchRelationship,
		Stats: pages.ProfileStats{
			RepoCount:      repoCount,
			StringCount:    stringCount,
			StarredCount:   starredCount,
			FollowersCount: followStats.Followers,
			FollowingCount: followStats.Following,
		},
		Punchcard: punchcard,
	}, nil
}

func (s *State) profileOverview(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "profileHomePage")

	profile, err := s.profile(r)
	if err != nil {
		l.Error("failed to build profile card", "err", err)
		s.pages.Error500(w)
		return
	}
	l = l.With("profileDid", profile.UserDid)

	repos, err := db.GetRepos(
		s.db,
		orm.FilterEq("did", profile.UserDid),
	)
	if err != nil {
		l.Error("failed to fetch repos", "err", err)
	}

	// filter out ones that are pinned
	pinnedRepos := []models.Repo{}
	for i, r := range repos {
		if profile.Profile.MatchesPinnedRepo(r) {
			pinnedRepos = append(pinnedRepos, r)
		} else if profile.Profile.IsPinnedReposEmpty() && i < 4 {
			pinnedRepos = append(pinnedRepos, r)
		}
	}

	collaboratingRepos, err := db.CollaboratingIn(s.db, profile.UserDid)
	if err != nil {
		l.Error("failed to fetch collaborating repos", "err", err)
	}

	pinnedCollaboratingRepos := []models.Repo{}
	for _, r := range collaboratingRepos {
		if profile.Profile.MatchesPinnedRepo(r) {
			pinnedCollaboratingRepos = append(pinnedCollaboratingRepos, r)
		}
	}

	timeline, err := db.MakeProfileTimeline(s.db, profile.UserDid)
	if err != nil {
		l.Error("failed to create timeline", "err", err)
	}

	err = s.pages.ProfileOverview(w, pages.ProfileOverviewParams{
		BaseParams:         pages.BaseParamsFromContext(r.Context()),
		Card:               profile,
		Repos:              pinnedRepos,
		CollaboratingRepos: pinnedCollaboratingRepos,
		ProfileTimeline:    timeline,
	})
	if err != nil {
		l.Error("failed to render template", "err", err)
	}
}

func (s *State) shouldShowPunchcard(targetDid, requesterDid string) bool {
	l := s.logger.With("helper", "shouldShowPunchcard")

	targetPunchcardPreferences, err := db.GetPunchcardPreference(s.db, targetDid)
	if err != nil {
		l.Error("failed to get target users punchcard preferences", "err", err)
		return true
	}

	requesterPunchcardPreferences, err := db.GetPunchcardPreference(s.db, requesterDid)
	if err != nil {
		l.Error("failed to get requester users punchcard preferences", "err", err)
		return true
	}

	showPunchcard := true

	// looking at their own profile
	if targetDid == requesterDid {
		if targetPunchcardPreferences.HideMine {
			return false
		}
		return true
	}

	if targetPunchcardPreferences.HideMine || requesterPunchcardPreferences.HideOthers {
		showPunchcard = false
	}
	return showPunchcard
}

func (s *State) reposPage(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "reposPage")

	profile, err := s.profile(r)
	if err != nil {
		l.Error("failed to build profile card", "err", err)
		s.pages.Error500(w)
		return
	}
	l = l.With("profileDid", profile.UserDid)

	params := r.URL.Query()
	page := pagination.FromContext(r.Context())

	query := searchquery.Parse(params.Get("q"))

	var language string
	if lang := cmp.Or(query.Get("language"), query.Get("lang")); lang != nil {
		language = *lang
	}

	tf := searchquery.ExtractTextFilters(query)

	searchOpts := models.RepoSearchOptions{
		Keywords:        tf.Keywords,
		Phrases:         tf.Phrases,
		NegatedKeywords: tf.NegatedKeywords,
		NegatedPhrases:  tf.NegatedPhrases,
		Did:             profile.UserDid,
		Language:        language,
		Page:            page,
	}

	var repos []models.Repo
	var totalRepos int64
	loggedInUser := s.oauth.GetMultiAccountUser(r)

	if searchOpts.HasSearchFilters() {
		res, err := s.indexer.Repos.Search(r.Context(), searchOpts)
		if err != nil {
			l.Error("failed to search repos", "err", err)
			s.pages.Error500(w)
			return
		}

		if len(res.Hits) > 0 {
			repos, err = db.GetRepos(s.db, orm.FilterIn("id", res.Hits))
			if err != nil {
				l.Error("failed to get repos by IDs", "err", err)
				s.pages.Error500(w)
				return
			}

			// sort repos to match search result order (by relevance)
			repoMap := make(map[int64]models.Repo, len(repos))
			for _, repo := range repos {
				repoMap[repo.Id] = repo
			}
			repos = make([]models.Repo, 0, len(res.Hits))
			for _, id := range res.Hits {
				if repo, ok := repoMap[id]; ok {
					repos = append(repos, repo)
				}
			}
		}
		totalRepos = int64(res.Total)
	} else {
		repos, err = db.GetReposPaginated(
			s.db,
			page,
			orm.FilterEq("did", profile.UserDid),
		)
		if err != nil {
			l.Error("failed to get repos", "err", err)
			s.pages.Error500(w)
			return
		}

		totalRepos, err = db.CountRepos(
			s.db,
			orm.FilterEq("did", profile.UserDid),
		)
		if err != nil {
			l.Error("failed to count repos", "err", err)
			s.pages.Error500(w)
			return
		}
	}

	starStatuses := map[string]bool{}
	if loggedInUser != nil {
		repoDids := make([]string, 0, len(repos))
		for _, repo := range repos {
			if repo.RepoDid != "" {
				repoDids = append(repoDids, repo.RepoDid)
			}
		}

		starStatuses, err = db.GetStarStatuses(s.db, loggedInUser.Did, repoDids)
		if err != nil {
			l.Error("failed to get repo star statuses", "err", err)
			s.pages.Error500(w)
			return
		}
	}

	err = s.pages.ProfileRepos(w, pages.ProfileReposParams{
		BaseParams:   pages.BaseParamsFromContext(r.Context()),
		Repos:        repos,
		StarStatuses: starStatuses,
		Card:         profile,
		Page:         page,
		RepoCount:    int(totalRepos),
		FilterQuery:  query.String(),
	})
	if err != nil {
		l.Error("failed to render page", "err", err)
	}
}

func (s *State) starredPage(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "starredPage")

	page := pagination.FromContext(r.Context())
	l = l.With("page", page)

	profile, err := s.profile(r)
	if err != nil {
		l.Error("failed to build profile card", "err", err)
		s.pages.Error500(w)
		return
	}
	l = l.With("profileDid", profile.UserDid)

	stars, err := db.GetRepoStars(s.db, page, orm.FilterEq("did", profile.UserDid))
	if err != nil {
		l.Error("failed to get stars", "err", err)
		s.pages.Error500(w)
		return
	}
	var repos []models.Repo
	for _, s := range stars {
		repos = append(repos, *s.Repo)
	}

	err = s.pages.ProfileStarred(w, pages.ProfileStarredParams{
		BaseParams: pages.BaseParamsFromContext(r.Context()),
		Repos:      repos,
		Total:      int(profile.Stats.StarredCount),
		Card:       profile,
		Page:       page,
	})
	if err != nil {
		l.Error("failed to render", "err", err)
	}
}

func (s *State) stringsPage(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "stringsPage")

	profile, err := s.profile(r)
	if err != nil {
		l.Error("failed to build profile card", "err", err)
		s.pages.Error500(w)
		return
	}
	l = l.With("profileDid", profile.UserDid)

	strings, err := db.GetStrings(s.db, 0, orm.FilterEq("did", profile.UserDid))
	if err != nil {
		l.Error("failed to get strings", "err", err)
		s.pages.Error500(w)
		return
	}

	err = s.pages.ProfileStrings(w, pages.ProfileStringsParams{
		BaseParams: pages.BaseParamsFromContext(r.Context()),
		Strings:    strings,
		Card:       profile,
	})
}

func (s *State) vouchesPage(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "vouchesPage")

	profile, err := s.profile(r)
	if err != nil {
		l.Error("failed to build profile card", "err", err)
		s.pages.Error500(w)
		return
	}
	l = l.With("profileDid", profile.UserDid)

	loggedInUser := s.oauth.GetMultiAccountUser(r)
	page := pagination.FromContext(r.Context())

	var vouches []models.Vouch
	var vouchCount int
	if loggedInUser != nil {
		vouches, err = db.GetNetworkVouchTimeline(s.db, loggedInUser.Did, profile.UserDid, page)
		if err != nil {
			l.Error("failed to get vouch timeline", "err", err)
			s.pages.Error500(w)
			return
		}
		vouchCount, err = db.CountNetworkVouchTimeline(s.db, loggedInUser.Did, profile.UserDid)
		if err != nil {
			l.Error("failed to count vouch timeline", "err", err)
			s.pages.Error500(w)
			return
		}
	}

	var suggestions []models.VouchSuggestion
	if loggedInUser != nil && loggedInUser.Did == profile.UserDid {
		suggestions, err = db.GetVouchSuggestions(s.db, profile.UserDid, 5)
		if err != nil {
			l.Error("failed to get vouch suggestions", "err", err)
		}

		if len(suggestions) > 0 {
			suggestionDids := make([]syntax.DID, len(suggestions))
			for i, s := range suggestions {
				suggestionDids[i] = syntax.DID(s.Did)
			}
			relationships, err := db.GetVouchRelationshipsBatch(s.db, syntax.DID(loggedInUser.Did), suggestionDids)
			if err != nil {
				l.Error("failed to get vouch relationships for suggestions", "err", err)
			} else {
				for i := range suggestions {
					suggestions[i].VouchRelationship = relationships[suggestions[i].Did]
				}
			}
		}
	}

	var pullAts, issueAts []syntax.ATURI
	for _, v := range vouches {
		for _, ev := range v.Evidences {
			switch ev.Collection().String() {
			case tangled.RepoPullNSID:
				pullAts = append(pullAts, ev)
			case tangled.RepoIssueNSID:
				issueAts = append(issueAts, ev)
			}
		}
	}

	evidencePulls := make(map[syntax.ATURI]*models.Pull)
	if len(pullAts) > 0 {
		pulls, err := db.GetPulls(s.db, orm.FilterIn("at_uri", pullAts))
		if err != nil {
			l.Error("failed to get evidence pulls", "err", err)
		} else {
			for _, p := range pulls {
				evidencePulls[p.AtUri()] = p
			}
		}
	}

	evidenceIssues := make(map[syntax.ATURI]*models.Issue)
	if len(issueAts) > 0 {
		issues, err := db.GetIssues(s.db, orm.FilterIn("at_uri", issueAts))
		if err != nil {
			l.Error("failed to get evidence issues", "err", err)
		} else {
			for i := range issues {
				evidenceIssues[issues[i].AtUri()] = &issues[i]
			}
		}
	}

	err = s.pages.ProfileVouches(w, pages.ProfileVouchesParams{
		BaseParams:     pages.BaseParamsFromContext(r.Context()),
		Vouches:        vouches,
		Suggestions:    suggestions,
		Card:           profile,
		Page:           page,
		VouchCount:     vouchCount,
		EvidencePulls:  evidencePulls,
		EvidenceIssues: evidenceIssues,
	})
	if err != nil {
		l.Error("failed to render page", "err", err)
	}
}

type FollowsPageParams struct {
	Follows []pages.FollowCard
	Card    *pages.ProfileCard
}

func (s *State) followPage(
	r *http.Request,
	fetchFollows func(db.Execer, string) ([]models.Follow, error),
	extractDid func(models.Follow) string,
) (*FollowsPageParams, error) {
	l := s.logger.With("handler", "reposPage")

	profile, err := s.profile(r)
	if err != nil {
		return nil, err
	}
	l = l.With("profileDid", profile.UserDid)

	loggedInUser := s.oauth.GetMultiAccountUser(r)
	params := FollowsPageParams{
		Card: profile,
	}

	follows, err := fetchFollows(s.db, profile.UserDid)
	if err != nil {
		l.Error("failed to fetch follows", "err", err)
		return &params, err
	}

	if len(follows) == 0 {
		return &params, nil
	}

	followDids := make([]string, 0, len(follows))
	for _, follow := range follows {
		followDids = append(followDids, extractDid(follow))
	}

	profiles, err := db.GetProfiles(s.db, orm.FilterIn("did", followDids))
	if err != nil {
		l.Error("failed to get profiles", "followDids", followDids, "err", err)
		return &params, err
	}

	followStatsMap, err := db.GetFollowerFollowingCounts(s.db, followDids)
	if err != nil {
		l.Error("getting follow counts", "followDids", followDids, "err", err)
	}

	loggedInUserFollowing := make(map[string]struct{})
	if loggedInUser != nil {
		following, err := db.GetFollowing(s.db, loggedInUser.Did)
		if err != nil {
			l.Error("failed to get follow list", "err", err, "loggedInUser", loggedInUser.Did)
			return &params, err
		}
		loggedInUserFollowing = make(map[string]struct{}, len(following))
		for _, follow := range following {
			loggedInUserFollowing[follow.SubjectDid] = struct{}{}
		}
	}

	followCards := make([]pages.FollowCard, len(follows))
	for i, did := range followDids {
		followStats := followStatsMap[did]
		followStatus := models.IsNotFollowing
		if _, exists := loggedInUserFollowing[did]; exists {
			followStatus = models.IsFollowing
		} else if loggedInUser != nil && loggedInUser.Did == did {
			followStatus = models.IsSelf
		}

		var profile *models.Profile
		if p, exists := profiles[did]; exists {
			profile = p
		} else {
			profile = &models.Profile{}
			profile.Did = did
		}
		followCards[i] = pages.FollowCard{
			BaseParams:     pages.BaseParamsFromContext(r.Context()),
			UserDid:        did,
			FollowStatus:   followStatus,
			FollowersCount: followStats.Followers,
			FollowingCount: followStats.Following,
			Profile:        profile,
		}
	}

	params.Follows = followCards

	return &params, nil
}

func (s *State) followersPage(w http.ResponseWriter, r *http.Request) {
	followPage, err := s.followPage(r, db.GetFollowers, func(f models.Follow) string { return f.UserDid })
	if err != nil {
		s.pages.Notice(w, "all-followers", "Failed to load followers")
		return
	}

	s.pages.ProfileFollowers(w, pages.ProfileFollowersParams{
		BaseParams: pages.BaseParamsFromContext(r.Context()),
		Followers:  followPage.Follows,
		Card:       followPage.Card,
	})
}

func (s *State) followingPage(w http.ResponseWriter, r *http.Request) {
	followPage, err := s.followPage(r, db.GetFollowing, func(f models.Follow) string { return f.SubjectDid })
	if err != nil {
		s.pages.Notice(w, "all-following", "Failed to load following")
		return
	}

	s.pages.ProfileFollowing(w, pages.ProfileFollowingParams{
		BaseParams: pages.BaseParamsFromContext(r.Context()),
		Following:  followPage.Follows,
		Card:       followPage.Card,
	})
}

func (s *State) AtomFeedPage(w http.ResponseWriter, r *http.Request) {
	ident, ok := r.Context().Value("resolvedId").(identity.Identity)
	if !ok {
		s.pages.Error404(w)
		return
	}

	feed, err := s.getProfileFeed(r.Context(), &ident)
	if err != nil {
		s.pages.Error500(w)
		return
	}

	if feed == nil {
		return
	}

	atom, err := feed.ToAtom()
	if err != nil {
		s.pages.Error500(w)
		return
	}

	w.Header().Set("content-type", "application/atom+xml")
	w.Write([]byte(atom))
}

func (s *State) getProfileFeed(ctx context.Context, id *identity.Identity) (*feeds.Feed, error) {
	timeline, err := db.MakeProfileTimeline(s.db, id.DID.String())
	if err != nil {
		return nil, err
	}

	author := &feeds.Author{
		Name: fmt.Sprintf("@%s", id.Handle),
	}

	feed := feeds.Feed{
		Title:   fmt.Sprintf("%s's timeline", author.Name),
		Link:    &feeds.Link{Href: fmt.Sprintf("%s/@%s", s.config.Core.BaseUrl(), id.Handle), Type: "text/html", Rel: "alternate"},
		Items:   make([]*feeds.Item, 0),
		Updated: time.UnixMilli(0),
		Author:  author,
	}

	for _, byMonth := range timeline.ByMonth {
		if err := s.addPullRequestItems(ctx, &feed, byMonth.PullEvents.Items, author); err != nil {
			return nil, err
		}
		if err := s.addIssueItems(ctx, &feed, byMonth.IssueEvents.Items, author); err != nil {
			return nil, err
		}
		if err := s.addRepoItems(ctx, &feed, byMonth.RepoEvents, author); err != nil {
			return nil, err
		}
	}

	slices.SortFunc(feed.Items, func(a *feeds.Item, b *feeds.Item) int {
		return int(b.Created.UnixMilli()) - int(a.Created.UnixMilli())
	})

	if len(feed.Items) > 0 {
		feed.Updated = feed.Items[0].Created
	}

	return &feed, nil
}

func (s *State) addPullRequestItems(ctx context.Context, feed *feeds.Feed, pulls []*models.Pull, author *feeds.Author) error {
	for _, pull := range pulls {
		owner, err := s.idResolver.ResolveIdent(ctx, pull.Repo.Did)
		if err != nil {
			return err
		}

		// Add pull request creation item
		feed.Items = append(feed.Items, s.createPullRequestItem(pull, owner, author))
	}
	return nil
}

func (s *State) addIssueItems(ctx context.Context, feed *feeds.Feed, issues []*models.Issue, author *feeds.Author) error {
	for _, issue := range issues {
		owner, err := s.idResolver.ResolveIdent(ctx, issue.Repo.Did)
		if err != nil {
			return err
		}

		feed.Items = append(feed.Items, s.createIssueItem(issue, owner, author))
	}
	return nil
}

func (s *State) addRepoItems(ctx context.Context, feed *feeds.Feed, repos []models.RepoEvent, author *feeds.Author) error {
	for _, repo := range repos {
		item, err := s.createRepoItem(ctx, repo, author)
		if err != nil {
			return err
		}
		feed.Items = append(feed.Items, item)
	}
	return nil
}

func (s *State) createPullRequestItem(pull *models.Pull, owner *identity.Identity, author *feeds.Author) *feeds.Item {
	return &feeds.Item{
		Title:   fmt.Sprintf("%s created pull request '%s' in @%s/%s", author.Name, pull.Title, owner.Handle, pull.Repo.Name),
		Link:    &feeds.Link{Href: fmt.Sprintf("%s/@%s/%s/pulls/%d", s.config.Core.BaseUrl(), owner.Handle, pull.Repo.Slug(), pull.PullId), Type: "text/html", Rel: "alternate"},
		Created: pull.Created,
		Author:  author,
	}
}

func (s *State) createIssueItem(issue *models.Issue, owner *identity.Identity, author *feeds.Author) *feeds.Item {
	return &feeds.Item{
		Title:   fmt.Sprintf("%s created issue '%s' in @%s/%s", author.Name, issue.Title, owner.Handle, issue.Repo.Name),
		Link:    &feeds.Link{Href: fmt.Sprintf("%s/@%s/%s/issues/%d", s.config.Core.BaseUrl(), owner.Handle, issue.Repo.Slug(), issue.IssueId), Type: "text/html", Rel: "alternate"},
		Created: issue.Created,
		Author:  author,
	}
}

func (s *State) createRepoItem(ctx context.Context, repo models.RepoEvent, author *feeds.Author) (*feeds.Item, error) {
	var title string
	if repo.Source != nil {
		sourceOwner, err := s.idResolver.ResolveIdent(ctx, repo.Source.Did)
		if err != nil {
			return nil, err
		}
		title = fmt.Sprintf("%s forked repository @%s/%s to '%s'", author.Name, sourceOwner.Handle, repo.Source.Name, repo.Repo.Name)
	} else {
		title = fmt.Sprintf("%s created repository '%s'", author.Name, repo.Repo.Name)
	}

	return &feeds.Item{
		Title:   title,
		Link:    &feeds.Link{Href: fmt.Sprintf("%s/@%s/%s", s.config.Core.BaseUrl(), author.Name[1:], repo.Repo.Slug()), Type: "text/html", Rel: "alternate"}, // Remove @ prefix
		Created: repo.Repo.Created,
		Author:  author,
	}, nil
}

func (s *State) UpdateProfileBio(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "UpdateProfileBio")
	user := s.oauth.GetMultiAccountUser(r)

	err := r.ParseForm()
	if err != nil {
		l.Error("invalid profile update form", "err", err)
		s.pages.Notice(w, "update-profile", "Invalid form.")
		return
	}

	profile, err := db.GetProfile(s.db, user.Did)
	if err != nil {
		l.Error("getting profile data", "did", user.Did, "err", err)
	}
	if profile == nil {
		profile = &models.Profile{Did: user.Did}
	}

	profile.Description = r.FormValue("description")
	profile.IncludeBluesky = r.FormValue("includeBluesky") == "on"
	profile.Location = r.FormValue("location")
	profile.Pronouns = r.FormValue("pronouns")
	rawPreferredHandle := strings.TrimSpace(r.FormValue("preferredHandle"))
	if rawPreferredHandle != "" {
		h, err := syntax.ParseHandle(rawPreferredHandle)
		if err != nil {
			s.pages.Notice(w, "update-profile", "Invalid handle format.")
			return
		}

		ident, err := s.idResolver.ResolveIdent(r.Context(), user.Did)
		if err != nil || !slices.Contains(ident.AlsoKnownAs, "at://"+rawPreferredHandle) {
			s.pages.Notice(w, "update-profile", "Handle not found in your DID document.")
			return
		}
		profile.PreferredHandle = h
	} else {
		profile.PreferredHandle = ""
	}

	var links [5]string
	for i := range 5 {
		iLink := r.FormValue(fmt.Sprintf("link%d", i))
		links[i] = iLink
	}
	profile.Links = links

	// Parse stats (exactly 2)
	stat0 := r.FormValue("stat0")
	stat1 := r.FormValue("stat1")

	profile.Stats[0].Kind = models.ParseVanityStatKind(stat0)
	profile.Stats[1].Kind = models.ParseVanityStatKind(stat1)

	if err := db.ValidateProfile(s.db, profile); err != nil {
		l.Error("invalid profile", "err", err)
		s.pages.Notice(w, "update-profile", err.Error())
		return
	}

	s.updateProfile(profile, w, r)
}

func (s *State) UpdateProfilePins(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "UpdateProfilePins")
	user := s.oauth.GetMultiAccountUser(r)

	err := r.ParseForm()
	if err != nil {
		l.Error("invalid profile update form", "err", err)
		s.pages.Notice(w, "update-profile", "Invalid form.")
		return
	}

	profile, err := db.GetProfile(s.db, user.Did)
	if err != nil {
		l.Error("getting profile data", "did", user.Did, "err", err)
	}
	if profile == nil {
		profile = &models.Profile{Did: user.Did}
	}

	i := 0
	var pinnedRepos [6]string
	for key, values := range r.Form {
		if i >= 6 {
			l.Warn("too many pinned repos")
			s.pages.Notice(w, "update-profile", "Only 6 repositories can be pinned at a time.")
			return
		}
		if strings.HasPrefix(key, "pinnedRepo") && len(values) > 0 && values[0] != "" && i < 6 {
			pinnedRepos[i] = values[0]
			i++
		}
	}
	profile.PinnedRepos = pinnedRepos

	s.updateProfile(profile, w, r)
}

func (s *State) updateProfile(profile *models.Profile, w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "updateProfile")
	user := s.oauth.GetMultiAccountUser(r)
	tx, err := s.db.BeginTx(r.Context(), nil)
	if err != nil {
		l.Error("failed to start transaction", "err", err)
		s.pages.Notice(w, "update-profile", "Failed to update profile, try again later.")
		return
	}
	defer tx.Rollback()

	err = db.UpsertProfile(tx, profile)
	if err != nil {
		l.Error("failed to update profile", "err", err)
		s.pages.Notice(w, "update-profile", "Failed to update profile, try again later.")
		return
	}

	client, err := s.oauth.AuthorizedClient(r)
	if err != nil {
		l.Error("failed to get authorized client", "err", err)
		s.pages.Notice(w, "update-profile", "Failed to update profile, try again later.")
		return
	}

	var pinnedRepoStrings []string
	for _, r := range profile.PinnedRepos {
		if r != "" {
			pinnedRepoStrings = append(pinnedRepoStrings, r)
		}
	}

	var vanityStats []string
	for _, v := range profile.Stats {
		vanityStats = append(vanityStats, string(v.Kind))
	}

	ex, _ := comatproto.RepoGetRecord(r.Context(), client, "", tangled.ActorProfileNSID, user.Did, "self")
	var cid *string
	var existingAvatar *lexutil.LexBlob
	if ex != nil {
		cid = ex.Cid
		if rec, ok := ex.Value.Val.(*tangled.ActorProfile); ok {
			existingAvatar = rec.Avatar
		}
	}

	_, err = comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{
		Collection: tangled.ActorProfileNSID,
		Repo:       user.Did,
		Rkey:       "self",
		Record: &lexutil.LexiconTypeDecoder{
			Val: &tangled.ActorProfile{
				Avatar:             existingAvatar,
				Bluesky:            profile.IncludeBluesky,
				Description:        &profile.Description,
				Links:              profile.Links[:],
				Location:           &profile.Location,
				PinnedRepositories: pinnedRepoStrings,
				Stats:              vanityStats[:],
				Pronouns:           &profile.Pronouns,
				PreferredHandle:    (*string)(&profile.PreferredHandle),
			}},
		SwapRecord: cid,
	})
	if err != nil {
		l.Error("failed to update profile on PDS", "err", err)
		s.pages.Notice(w, "update-profile", "Failed to update PDS, try again later.")
		return
	}

	if err := tx.Commit(); err != nil {
		// db failed, but PDS operation succeed.
		// log error and continue
		l.Error("failed to update profile in DB", "err", err)
	}

	if s.rdb != nil {
		ctx := r.Context()
		pipe := s.rdb.Pipeline()
		didKey := fmt.Sprintf(cache.PreferredHandleByDid, profile.Did)
		if profile.PreferredHandle != "" {
			pipe.Set(ctx, didKey, string(profile.PreferredHandle), cache.PreferredHandleTTL)
			pipe.Set(ctx, fmt.Sprintf(cache.PreferredHandleByHandle, string(profile.PreferredHandle)), profile.Did, cache.PreferredHandleTTL)
		} else {
			pipe.Del(ctx, didKey)
		}
		if _, execErr := pipe.Exec(ctx); execErr != nil {
			l.Warn("failed to update preferred handle cache", "err", execErr)
		}
	}

	s.notifier.UpdateProfile(r.Context(), profile)

	s.pages.HxRedirect(w, "/"+user.Did)
}

func (s *State) ProfilePopover(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "ProfilePopover")

	did := r.URL.Query().Get("did")
	if did == "" {
		l.Warn("missing did param")
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	profile, err := db.GetProfile(s.db, did)
	if err != nil {
		l.Error("failed to get profile", "did", did, "err", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}
	if profile == nil {
		profile = &models.Profile{Did: did}
	}

	followStats, err := db.GetFollowerFollowingCount(s.db, did)
	if err != nil {
		l.Error("failed to get follower stats", "did", did, "err", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	loggedInUser := s.oauth.GetMultiAccountUser(r)
	followStatus := models.IsNotFollowing
	var vouchRelationship *models.VouchRelationship

	if loggedInUser != nil {
		followStatus = db.GetFollowStatus(s.db, loggedInUser.Did, did)
		vouchRelationship, _ = db.GetVouchRelationship(s.db, syntax.DID(loggedInUser.Did), syntax.DID(did))
	}

	s.pages.ProfilePopoverFragment(w, pages.ProfilePopoverParams{
		BaseParams:        pages.BaseParamsFromContext(r.Context()),
		UserDid:           did,
		Profile:           profile,
		FollowStatus:      followStatus,
		VouchRelationship: vouchRelationship,
		Stats: pages.ProfilePopoverStats{
			FollowersCount: followStats.Followers,
			FollowingCount: followStats.Following,
		},
	})
}

func (s *State) EditBioFragment(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "EditBioFragment")
	user := s.oauth.GetMultiAccountUser(r)

	profile, err := db.GetProfile(s.db, user.Did)
	if err != nil {
		l.Error("getting profile data", "did", user.Did, "err", err)
	}
	if profile == nil {
		profile = &models.Profile{Did: user.Did}
	}

	var alsoKnownAs []string
	ident, err := s.idResolver.ResolveIdent(r.Context(), user.Did)
	if err == nil {
		alsoKnownAs = ident.AlsoKnownAs
	}

	s.pages.EditBioFragment(w, pages.EditBioParams{
		BaseParams:  pages.BaseParamsFromContext(r.Context()),
		Profile:     profile,
		AlsoKnownAs: alsoKnownAs,
	})
}

func (s *State) EditPinsFragment(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "EditPinsFragment")
	user := s.oauth.GetMultiAccountUser(r)

	profile, err := db.GetProfile(s.db, user.Did)
	if err != nil {
		l.Error("getting profile data", "did", user.Did, "err", err)
	}
	if profile == nil {
		profile = &models.Profile{Did: user.Did}
	}

	repos, err := db.GetRepos(s.db, orm.FilterEq("did", user.Did))
	if err != nil {
		l.Error("getting repos", "did", user.Did, "err", err)
	}

	collaboratingRepos, err := db.CollaboratingIn(s.db, user.Did)
	if err != nil {
		l.Error("getting collaborating repos", "did", user.Did, "err", err)
	}

	allRepos := []pages.PinnedRepo{}

	for _, r := range repos {
		allRepos = append(allRepos, pages.PinnedRepo{
			IsPinned: profile.MatchesPinnedRepo(r),
			Repo:     r,
		})
	}
	for _, r := range collaboratingRepos {
		allRepos = append(allRepos, pages.PinnedRepo{
			IsPinned: profile.MatchesPinnedRepo(r),
			Repo:     r,
		})
	}

	s.pages.EditPinsFragment(w, pages.EditPinsParams{
		BaseParams: pages.BaseParamsFromContext(r.Context()),
		Profile:    profile,
		AllRepos:   allRepos,
	})
}

func (s *State) UploadProfileAvatar(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "UploadProfileAvatar")
	user := s.oauth.GetMultiAccountUser(r)
	l = l.With("did", user.Did)

	// Parse multipart form (10MB max)
	if err := r.ParseMultipartForm(10 << 20); err != nil {
		l.Error("failed to parse form", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to parse form")
		return
	}

	file, header, err := r.FormFile("avatar")
	if err != nil {
		l.Error("failed to read avatar file", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to read avatar file")
		return
	}
	defer file.Close()

	if header.Size > 5000000 {
		l.Warn("avatar file too large", "size", header.Size)
		s.pages.Notice(w, "avatar-error", "Avatar file too large (max 5MB)")
		return
	}

	contentType := header.Header.Get("Content-Type")
	if contentType != "image/png" && contentType != "image/jpeg" {
		l.Warn("invalid image type", "contentType", contentType)
		s.pages.Notice(w, "avatar-error", "Invalid image type (only PNG and JPEG allowed)")
		return
	}

	client, err := s.oauth.AuthorizedClient(r)
	if err != nil {
		l.Error("failed to get PDS client", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to connect to your PDS")
		return
	}

	uploadBlobResp, err := xrpc.RepoUploadBlob(r.Context(), client, file, header.Header.Get("Content-Type"))
	if err != nil {
		l.Error("failed to upload avatar blob", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to upload avatar to your PDS")
		return
	}

	l.Info("uploaded avatar blob", "cid", uploadBlobResp.Blob.Ref.String())

	// get current profile record from PDS to get its CID for swap
	getRecordResp, err := comatproto.RepoGetRecord(r.Context(), client, "", tangled.ActorProfileNSID, user.Did, "self")
	if err != nil {
		l.Error("failed to get current profile record", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to get current profile from your PDS")
		return
	}

	var profileRecord *tangled.ActorProfile
	if getRecordResp.Value != nil {
		if val, ok := getRecordResp.Value.Val.(*tangled.ActorProfile); ok {
			profileRecord = val
		} else {
			l.Warn("profile record type assertion failed, creating new record")
			profileRecord = &tangled.ActorProfile{}
		}
	} else {
		l.Warn("no existing profile record, creating new record")
		profileRecord = &tangled.ActorProfile{}
	}

	profileRecord.Avatar = uploadBlobResp.Blob

	_, err = comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{
		Collection: tangled.ActorProfileNSID,
		Repo:       user.Did,
		Rkey:       "self",
		Record:     &lexutil.LexiconTypeDecoder{Val: profileRecord},
		SwapRecord: getRecordResp.Cid,
	})

	if err != nil {
		l.Error("failed to update profile record", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to update profile on your PDS")
		return
	}

	l.Info("successfully updated profile with avatar")

	profile, err := db.GetProfile(s.db, user.Did)
	if err != nil {
		l.Warn("getting profile data from DB", "err", err)
	}
	if profile == nil {
		profile = &models.Profile{Did: user.Did}
	}
	profile.Avatar = uploadBlobResp.Blob.Ref.String()

	tx, err := s.db.BeginTx(r.Context(), nil)
	if err != nil {
		l.Error("failed to start transaction", "err", err)
		s.pages.HxRefresh(w)
		w.WriteHeader(http.StatusOK)
		return
	}

	err = db.UpsertProfile(tx, profile)
	if err != nil {
		l.Error("failed to update profile in DB", "err", err)
		s.pages.HxRefresh(w)
		w.WriteHeader(http.StatusOK)
		return
	}

	s.pages.HxRedirect(w, r.Header.Get("Referer"))
}

func (s *State) RemoveProfileAvatar(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "RemoveProfileAvatar")
	user := s.oauth.GetMultiAccountUser(r)
	l = l.With("did", user.Did)

	client, err := s.oauth.AuthorizedClient(r)
	if err != nil {
		l.Error("failed to get PDS client", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to connect to your PDS")
		return
	}

	getRecordResp, err := comatproto.RepoGetRecord(r.Context(), client, "", tangled.ActorProfileNSID, user.Did, "self")
	if err != nil {
		l.Error("failed to get current profile record", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to get current profile from your PDS")
		return
	}

	var profileRecord *tangled.ActorProfile
	if getRecordResp.Value != nil {
		if val, ok := getRecordResp.Value.Val.(*tangled.ActorProfile); ok {
			profileRecord = val
		} else {
			l.Warn("profile record type assertion failed")
			profileRecord = &tangled.ActorProfile{}
		}
	} else {
		l.Warn("no existing profile record")
		profileRecord = &tangled.ActorProfile{}
	}

	profileRecord.Avatar = nil

	_, err = comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{
		Collection: tangled.ActorProfileNSID,
		Repo:       user.Did,
		Rkey:       "self",
		Record:     &lexutil.LexiconTypeDecoder{Val: profileRecord},
		SwapRecord: getRecordResp.Cid,
	})

	if err != nil {
		l.Error("failed to update profile record", "err", err)
		s.pages.Notice(w, "avatar-error", "Failed to remove avatar from your PDS")
		return
	}

	l.Info("successfully removed avatar from PDS")

	profile, err := db.GetProfile(s.db, user.Did)
	if err != nil {
		l.Warn("getting profile data from DB", "err", err)
	}
	if profile == nil {
		profile = &models.Profile{Did: user.Did}
	}
	profile.Avatar = ""

	tx, err := s.db.BeginTx(r.Context(), nil)
	if err != nil {
		l.Error("failed to start transaction", "err", err)
		s.pages.HxRefresh(w)
		w.WriteHeader(http.StatusOK)
		return
	}

	err = db.UpsertProfile(tx, profile)
	if err != nil {
		l.Error("failed to update profile in DB", "err", err)
		s.pages.HxRefresh(w)
		w.WriteHeader(http.StatusOK)
		return
	}

	s.pages.HxRedirect(w, r.Header.Get("Referer"))
}

func (s *State) UpdateProfilePunchcardSetting(w http.ResponseWriter, r *http.Request) {
	l := s.logger.With("handler", "UpdateProfilePunchcardSetting")
	err := r.ParseForm()
	if err != nil {
		l.Error("invalid profile update form", "err", err)
		return
	}
	user := s.oauth.GetMultiAccountUser(r)

	hideOthers := false
	hideMine := false

	if r.Form.Get("hideMine") == "on" {
		hideMine = true
	}
	if r.Form.Get("hideOthers") == "on" {
		hideOthers = true
	}

	err = db.UpsertPunchcardPreference(s.db, user.Did, hideMine, hideOthers)
	if err != nil {
		l.Error("failed to update punchcard preferences", "err", err)
		return
	}

	s.pages.HxRefresh(w)
}
