// Package api implements Minstrel's native JSON surface under /api. It is
// consumed by the built-in web SPA and (eventually) the Flutter client.
// Subsonic-compatible endpoints under /rest are intentionally separate —
// see internal/subsonic — and the two packages must not depend on each other.
package api

import (
	"log/slog"
	"math/rand"

	"github.com/go-chi/chi/v5"
	"github.com/jackc/pgx/v5/pgxpool"

	"git.fabledsword.com/bvandeusen/minstrel/internal/auth"
	"git.fabledsword.com/bvandeusen/minstrel/internal/config"
	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrconfig"
	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrquarantine"
	"git.fabledsword.com/bvandeusen/minstrel/internal/lidarrrequests"
	"git.fabledsword.com/bvandeusen/minstrel/internal/playevents"
	"git.fabledsword.com/bvandeusen/minstrel/internal/playlists"
	"git.fabledsword.com/bvandeusen/minstrel/internal/tracks"
)

// Mount attaches /api/* handlers to r. Public endpoints (login) are outside
// RequireUser; everything else is gated by the middleware. The events writer
// is shared with the Subsonic mount so /rest/scrobble feeds the same store.
func Mount(r chi.Router, pool *pgxpool.Pool, logger *slog.Logger, events *playevents.Writer, recCfg config.RecommendationConfig, lidarrCfg *lidarrconfig.Service, lidarrReqs *lidarrrequests.Service, lidarrQuar *lidarrquarantine.Service, tracksSvc *tracks.Service, playlistsSvc *playlists.Service, dataDir string) {
	rng := rand.New(rand.NewSource(rand.Int63()))
	h := &handlers{
		pool: pool, logger: logger, events: events, recCfg: recCfg,
		rng:              rng.Float64,
		lidarrCfg:        lidarrCfg,
		lidarrRequests:   lidarrReqs,
		lidarrQuarantine: lidarrQuar,
		tracks:           tracksSvc,
		playlists:        playlistsSvc,
		dataDir:          dataDir,
	}

	r.Route("/api", func(api chi.Router) {
		api.Post("/auth/login", h.handleLogin)
		api.Group(func(authed chi.Router) {
			authed.Use(auth.RequireUser(pool))
			authed.Post("/auth/logout", h.handleLogout)
			authed.Get("/me", h.handleGetMe)
			authed.Get("/me/listenbrainz", h.handleGetListenBrainz)
			authed.Put("/me/listenbrainz", h.handlePutListenBrainz)

			authed.Get("/artists", h.handleListArtists)
			authed.Get("/artists/{id}", h.handleGetArtist)
			authed.Get("/artists/{id}/tracks", h.handleGetArtistTracks)
			authed.Get("/albums/{id}", h.handleGetAlbum)
			authed.Get("/albums/{id}/cover", h.handleGetCover)
			authed.Get("/library/albums", h.handleListLibraryAlbums)
			authed.Get("/tracks/{id}", h.handleGetTrack)
			authed.Get("/tracks/{id}/stream", h.handleGetStream)
			authed.Get("/search", h.handleSearch)
			authed.Get("/radio", h.handleRadio)
			authed.Get("/discover/suggestions", h.handleListSuggestions)
			authed.Get("/home", h.handleGetHome)
			authed.Post("/events", h.handleEvents)
			authed.Post("/likes/tracks/{id}", h.handleLikeTrack)
			authed.Delete("/likes/tracks/{id}", h.handleUnlikeTrack)
			authed.Post("/likes/albums/{id}", h.handleLikeAlbum)
			authed.Delete("/likes/albums/{id}", h.handleUnlikeAlbum)
			authed.Post("/likes/artists/{id}", h.handleLikeArtist)
			authed.Delete("/likes/artists/{id}", h.handleUnlikeArtist)
			authed.Get("/likes/tracks", h.handleListLikedTracks)
			authed.Get("/likes/albums", h.handleListLikedAlbums)
			authed.Get("/likes/artists", h.handleListLikedArtists)
			authed.Get("/likes/ids", h.handleGetLikedIDs)

			authed.Get("/lidarr/search", h.handleLidarrSearch)

			authed.Post("/requests", h.handleCreateRequest)
			authed.Get("/requests", h.handleListRequests)
			authed.Get("/requests/{id}", h.handleGetRequest)
			authed.Delete("/requests/{id}", h.handleCancelRequest)

			authed.Post("/quarantine", h.handleFlag)
			authed.Delete("/quarantine/{track_id}", h.handleUnflag)
			authed.Get("/quarantine/mine", h.handleListMyQuarantine)

			authed.Route("/admin", func(admin chi.Router) {
				admin.Use(auth.RequireAdmin())
				admin.Get("/lidarr/config", h.handleGetLidarrConfig)
				admin.Put("/lidarr/config", h.handlePutLidarrConfig)
				admin.Post("/lidarr/test", h.handleTestLidarrConnection)
				admin.Get("/lidarr/quality-profiles", h.handleListQualityProfiles)
				admin.Get("/lidarr/metadata-profiles", h.handleListMetadataProfiles)
				admin.Get("/lidarr/root-folders", h.handleListRootFolders)
				admin.Get("/requests", h.handleListAdminRequests)
				admin.Post("/requests/{id}/approve", h.handleApproveRequest)
				admin.Post("/requests/{id}/reject", h.handleRejectRequest)

				admin.Get("/quarantine", h.handleListAdminQuarantine)
				admin.Post("/quarantine/{track_id}/resolve", h.handleResolveQuarantine)
				admin.Post("/quarantine/{track_id}/delete-file", h.handleDeleteQuarantineFile)
				admin.Post("/quarantine/{track_id}/delete-via-lidarr", h.handleDeleteQuarantineViaLidarr)
				admin.Get("/quarantine/actions", h.handleListQuarantineActions)

				admin.Delete("/tracks/{id}", h.handleRemoveTrack)
			})

			authed.Get("/playlists", h.handleListPlaylists)
			authed.Post("/playlists", h.handleCreatePlaylist)
			authed.Get("/playlists/{id}", h.handleGetPlaylist)
			authed.Patch("/playlists/{id}", h.handleUpdatePlaylist)
			authed.Delete("/playlists/{id}", h.handleDeletePlaylist)
			authed.Post("/playlists/{id}/tracks", h.handleAppendTracks)
			authed.Delete("/playlists/{id}/tracks/{position}", h.handleRemovePlaylistTrack)
			authed.Put("/playlists/{id}/tracks", h.handleReorderPlaylist)
			authed.Get("/playlists/{id}/cover", h.handleGetPlaylistCover)
		})
	})
}

type handlers struct {
	pool             *pgxpool.Pool
	logger           *slog.Logger
	events           *playevents.Writer
	recCfg           config.RecommendationConfig
	rng              func() float64
	lidarrCfg        *lidarrconfig.Service
	lidarrRequests   *lidarrrequests.Service
	lidarrQuarantine *lidarrquarantine.Service
	tracks           *tracks.Service
	playlists        *playlists.Service
	dataDir          string
}
