package api

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/jackc/pgx/v5/pgtype"
)

// seedMissingWant marks a track's file missing for two days and puts its
// album on the wanted list, held at heldDaysAgo (0 for an open want) and
// last searched with nothing found.
func seedMissingWant(t *testing.T, h *handlers, trackID, albumID pgtype.UUID, group string, heldDaysAgo int) string {
	t.Helper()
	ctx := context.Background()
	if _, err := h.pool.Exec(ctx,
		`UPDATE tracks SET missing_since = now() - interval '2 days' WHERE id = $1`, trackID); err != nil {
		t.Fatalf("mark missing: %v", err)
	}
	if _, err := h.pool.Exec(ctx, `DELETE FROM wants WHERE release_group_mbid = $1`, group); err != nil {
		t.Fatalf("clear want: %v", err)
	}
	var id pgtype.UUID
	if err := h.pool.QueryRow(ctx,
		`INSERT INTO wants (release_group_mbid, artist_mbid, artist_name, title, reason, album_id,
		                    wanted_at, fulfilled_at, searched_at, search_outcome)
		 VALUES ($1, 'artist-'||$1, 'Artist', 'Album '||$1, 'library', $2,
		         now() - interval '30 days',
		         CASE WHEN $3::int > 0 THEN now() - make_interval(days => $3::int) END,
		         now() - interval '1 hour', 'nothing')
		 RETURNING id`, group, albumID, heldDaysAgo).Scan(&id); err != nil {
		t.Fatalf("insert want: %v", err)
	}
	return uuidToString(id)
}

// A folder's album that was held before its files went is not wanted back
// yet (every library album is on the list, held, since #5567); an open want
// comes with its search, so the Missing page can show it and act on it (M504).
func TestListMissingTracks_WantState(t *testing.T) {
	h, pool := testHandlers(t)
	truncateLibrary(t, pool)
	admin := seedUser(t, pool, "admin", "pw", true)

	heldTrack, _ := seedTrackOnDisk(t, h, "missheld")
	openTrack, _ := seedTrackOnDisk(t, h, "missopen")
	seedMissingWant(t, h, heldTrack.ID, heldTrack.AlbumID, "rg-missing-held", 10)
	openID := seedMissingWant(t, h, openTrack.ID, openTrack.AlbumID, "rg-missing-open", 0)

	req := withUser(httptest.NewRequest(http.MethodGet, "/api/admin/library/missing", nil), admin)
	w := httptest.NewRecorder()
	h.handleListMissingTracks(w, req)
	if w.Code != http.StatusOK {
		t.Fatalf("status %d: %s", w.Code, w.Body.String())
	}
	var resp adminMissingResponse
	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if len(resp.Groups) != 2 {
		t.Fatalf("groups = %d, want 2", len(resp.Groups))
	}
	byTitle := map[string]missingGroupView{}
	for _, g := range resp.Groups {
		byTitle[g.Tracks[0].Title] = g
	}

	if r := byTitle["AdmQ Track missheld"].Reacquisition; r != nil {
		t.Errorf("held before the loss: reacquisition = %+v, want none", r)
	}
	r := byTitle["AdmQ Track missopen"].Reacquisition
	if r == nil || r.WantedAt == nil || r.HeldAt != nil {
		t.Fatalf("open want: reacquisition = %+v, want wanted and not held", r)
	}
	if r.Want == nil || r.Want.ID != openID {
		t.Fatalf("open want: want = %+v, want id %s", r.Want, openID)
	}
	if r.Want.Search == nil || r.Want.Search.Outcome != "nothing" {
		t.Errorf("open want: search = %+v, want outcome nothing", r.Want.Search)
	}
}