package admin

import (
	"fmt"
	"net/http"
	"strings"

	"arimelody-web/admin/templates"
	"arimelody-web/controller"
	"arimelody-web/model"
)

func serveTracks(app *model.AppState) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        session := r.Context().Value("session").(*model.Session)

        slices := strings.Split(strings.TrimPrefix(r.URL.Path, "/tracks")[1:], "/")
        trackID := slices[0]

        if len(trackID) > 0 {
            serveTrack(app, trackID).ServeHTTP(w, r)
            return
        }

        tracks, err := controller.GetAllTracks(app.DB)
        if err != nil {
            fmt.Printf("WARN: Failed to fetch tracks: %s\n", err)
            http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
            return
        }

        type TracksResponse struct {
            adminPageData
            Tracks []*model.Track
        }

        err = templates.TracksTemplate.Execute(w, TracksResponse{
            adminPageData: adminPageData{ Path: r.URL.Path, Session: session },
            Tracks: tracks,
        })
        if err != nil {
            fmt.Printf("WARN: Failed to serve admin tracks page: %s\n", err)
            http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
        }
    })
}

func serveTrack(app *model.AppState, trackID string) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        session := r.Context().Value("session").(*model.Session)

        track, err := controller.GetTrack(app.DB, trackID)
        if err != nil {
            fmt.Printf("WARN: Failed to serve admin track page for %s: %s\n", trackID, err)
            http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
            return
        }
        if track == nil {
            http.NotFound(w, r)
            return
        }

        releases, err := controller.GetTrackReleases(app.DB, track.ID, true)
        if err != nil {
            fmt.Printf("WARN: Failed to fetch releases for track %s: %s\n", trackID, err)
            http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
            return
        }

        type TrackResponse struct {
            adminPageData
            Track       *model.Track
            Releases    []*model.Release
        }

        err = templates.EditTrackTemplate.Execute(w, TrackResponse{
            adminPageData: adminPageData{ Path: r.URL.Path, Session: session },
            Track: track,
            Releases: releases,
        })
        if err != nil {
            fmt.Printf("WARN: Failed to serve admin track page for %s: %s\n", trackID, err)
            http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
        }
    })
}