import type { FastifyPluginAsync } from "fastify";
import { z } from "zod";
import { requireAuth, requireRestaurantMember } from "../lib/auth.js";
import { generateUniqueRestaurantSlug } from "../lib/slug.js";
import { supabase } from "../lib/supabase.js";

const createRestaurantSchema = z.object({
  name: z.string().min(1).max(120),
  logoUrl: z.string().nullish(),
  phone: z.string().max(30).nullish(),
  address: z.string().max(500).nullish(),
});

const updateRestaurantSchema = createRestaurantSchema.partial();

export const restaurantsRoutes: FastifyPluginAsync = async (app) => {
  app.post("/restaurants", async (req, reply) => {
    const userId = await requireAuth(req, reply);
    if (!userId || !supabase) return;

    const parsed = createRestaurantSchema.safeParse(req.body);
    if (!parsed.success) {
      return reply.code(400).send({ message: "invalid body", issues: parsed.error.issues });
    }

    const { name, logoUrl, phone, address } = parsed.data;
    const slug = await generateUniqueRestaurantSlug(name);

    const { data: restaurant, error: restaurantError } = await supabase
      .from("restaurants")
      .insert({
        name,
        slug,
        logo_url: logoUrl ?? null,
        phone: phone ?? null,
        address: address ?? null,
        created_by: userId,
      })
      .select()
      .single();

    if (restaurantError || !restaurant) {
      req.log.error(restaurantError);
      return reply.code(500).send({ message: "failed to create restaurant" });
    }

    const { error: memberError } = await supabase
      .from("restaurant_members")
      .insert({ restaurant_id: restaurant.id, user_id: userId, role: "owner" });

    const { data: location, error: locationError } = await supabase
      .from("locations")
      .insert({ restaurant_id: restaurant.id, name: "Ana Şube" })
      .select()
      .single();

    if (memberError || locationError || !location) {
      req.log.error(memberError ?? locationError);
      return reply.code(500).send({ message: "failed to finish restaurant setup" });
    }

    const { data: menu, error: menuError } = await supabase
      .from("menus")
      .insert({ location_id: location.id, name: "Menüm" })
      .select()
      .single();

    if (menuError || !menu) {
      req.log.error(menuError);
      return reply.code(500).send({ message: "failed to create default menu" });
    }

    return reply.code(201).send({ restaurant, location, menu });
  });

  app.get("/restaurants/:id", async (req, reply) => {
    const userId = await requireAuth(req, reply);
    if (!userId || !supabase) return;

    const { id } = req.params as { id: string };
    const isMember = await requireRestaurantMember(userId, id);
    if (!isMember) return reply.code(403).send({ message: "forbidden" });

    const { data, error } = await supabase.from("restaurants").select().eq("id", id).single();
    if (error || !data) return reply.code(404).send({ message: "not found" });

    return reply.send(data);
  });

  app.patch("/restaurants/:id", async (req, reply) => {
    const userId = await requireAuth(req, reply);
    if (!userId || !supabase) return;

    const { id } = req.params as { id: string };
    const isMember = await requireRestaurantMember(userId, id);
    if (!isMember) return reply.code(403).send({ message: "forbidden" });

    const parsed = updateRestaurantSchema.safeParse(req.body);
    if (!parsed.success) {
      return reply.code(400).send({ message: "invalid body", issues: parsed.error.issues });
    }

    const { name, logoUrl, phone, address } = parsed.data;
    const { data, error } = await supabase
      .from("restaurants")
      .update({
        ...(name !== undefined ? { name } : {}),
        ...(logoUrl !== undefined ? { logo_url: logoUrl } : {}),
        ...(phone !== undefined ? { phone } : {}),
        ...(address !== undefined ? { address } : {}),
        updated_at: new Date().toISOString(),
      })
      .eq("id", id)
      .select()
      .single();

    if (error || !data) {
      req.log.error(error);
      return reply.code(500).send({ message: "failed to update restaurant" });
    }

    return reply.send(data);
  });

  app.get("/restaurants/:id/theme", async (req, reply) => {
    const userId = await requireAuth(req, reply);
    if (!userId || !supabase) return;

    const { id } = req.params as { id: string };
    const isMember = await requireRestaurantMember(userId, id);
    if (!isMember) return reply.code(403).send({ message: "forbidden" });

    const { data: themeRow } = await supabase
      .from("restaurant_themes")
      .select("theme_id, overrides, themes(key, name, config)")
      .eq("restaurant_id", id)
      .maybeSingle();

    return reply.send({
      themeKey: (themeRow?.themes as unknown as { key?: string } | null)?.key ?? "elegant",
      overrides: themeRow?.overrides ?? {},
    });
  });

  app.put("/restaurants/:id/theme", async (req, reply) => {
    const userId = await requireAuth(req, reply);
    if (!userId || !supabase) return;

    const { id } = req.params as { id: string };
    const isMember = await requireRestaurantMember(userId, id);
    if (!isMember) return reply.code(403).send({ message: "forbidden" });

    const { themeKey } = (req.body as { themeKey?: string }) ?? {};
    if (!themeKey) {
      return reply.code(400).send({ message: "themeKey is required" });
    }

    const { data: themeData } = await supabase
      .from("themes")
      .select("id")
      .eq("key", themeKey)
      .maybeSingle();

    if (!themeData) {
      return reply.code(404).send({ message: "Theme not found" });
    }

    const { error } = await supabase.from("restaurant_themes").upsert(
      {
        restaurant_id: id,
        theme_id: themeData.id,
      },
      { onConflict: "restaurant_id" },
    );

    if (error) {
      req.log.error(error);
      return reply.code(500).send({ message: "failed to update theme" });
    }

    return reply.send({ success: true, themeKey });
  });
};