package admin

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

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

func serveArtists(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, "/artists")[1:], "/")
        artistID := slices[0]

        if len(artistID) > 0 {
            serveArtist(app, artistID).ServeHTTP(w, r)
            return
        }

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

        type ArtistsResponse struct {
            adminPageData
            Artists []*model.Artist
        }

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

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

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

        credits, err := controller.GetArtistCredits(app.DB, artist.ID, true)
        if err != nil {
            fmt.Printf("WARN: Failed to serve admin artist page for %s: %s\n", artistID, err)
            http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
            return
        }

        type ArtistResponse struct {
            adminPageData
            Artist *model.Artist
            Credits []*model.Credit
        }

        err = templates.EditArtistTemplate.Execute(w, ArtistResponse{
            adminPageData: adminPageData{ Path: r.URL.Path, Session: session },
            Artist: artist,
            Credits: credits,
        })
        if err != nil {
            fmt.Printf("WARN: Failed to serve admin artist page for %s: %s\n", artistID, err)
            http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
        }
    })
}