import { Elysia, t } from "elysia"
import { createCrudRoutes } from "./crud-builder"
import { games, gameVersions } from "@/lib/db/schema"
import { db } from "@/lib/db/index"
import { eq, and, or, desc, sql } from "drizzle-orm"
import { syncSteamGame } from "@/lib/steam/sync"
import { requireRole } from "@/lib/auth/guard"

// ── Games CRUD (uses builder) ─────────────────────────────────────
export const gamesRoutes = createCrudRoutes(games, {
  prefix: "/games",
  name: "Game",
  auth: { read: "public", write: "contributor", delete: "admin" },
  search: { fields: ["title", "developer", "publisher"] },
  filter: { fields: ["source", "onlineMultiplayerStatus", "syncStatus"] },
  paramName: "gameId",
})

// ── Game Versions (nested under /games/:gameId/versions) ──────────
export const gameVersionsRoutes = new Elysia({ prefix: "/games/:gameId/versions" })
  // LIST versions for a game
  .get(
    "/",
    async ({ params, query }) => {
      const limit = Math.min(Number(query.limit) || 20, 100)
      const offset = Number(query.offset) || 0

      const data = await db
        .select()
        .from(gameVersions)
        .where(eq(gameVersions.gameId, params.gameId))
        .orderBy(desc(gameVersions.createdAt))
        .limit(limit)
        .offset(offset)

      const [{ count }] = await db
        .select({ count: sql<number>`count(*)::int` })
        .from(gameVersions)
        .where(eq(gameVersions.gameId, params.gameId))

      return { data, total: count, limit, offset }
    },
    {
      params: t.Object({ gameId: t.String() }),
      query: t.Object({
        limit: t.Optional(t.String()),
        offset: t.Optional(t.String()),
      }),
    },
  )
  // GET single version
  .get(
    "/:id",
    async ({ params, set }) => {
      const [version] = await db
        .select()
        .from(gameVersions)
        .where(
          and(
            eq(gameVersions.id, params.id),
            eq(gameVersions.gameId, params.gameId),
          ),
        )
        .limit(1)

      if (!version) {
        set.status = 404
        return { error: "Version not found" }
      }

      return version
    },
    {
      params: t.Object({ gameId: t.String(), id: t.String() }),
    },
  )
  // CREATE version (contributor+ only)
  .post(
    "/",
    async ({ params, body, request, set }) => {
      const guard = await requireRole(request.headers, [
        "contributor",
        "admin",
      ])
      if (!guard.ok) {
        set.status = guard.status
        return { error: guard.error }
      }

      // Verify game exists
      const [game] = await db
        .select({ id: games.id })
        .from(games)
        .where(eq(games.id, params.gameId))
        .limit(1)

      if (!game) {
        set.status = 404
        return { error: "Game not found" }
      }

      const [created] = await db
        .insert(gameVersions)
        .values({ ...body, gameId: params.gameId })
        .returning()

      set.status = 201
      return created
    },
    {
      params: t.Object({ gameId: t.String() }),
      body: t.Object({
        buildId: t.Optional(t.String()),
        versionString: t.Optional(t.String()),
        isLatest: t.Optional(t.Boolean()),
      }),
    },
  )
  // UPDATE version
  .patch(
    "/:id",
    async ({ params, body, request, set }) => {
      const guard = await requireRole(request.headers, [
        "contributor",
        "admin",
      ])
      if (!guard.ok) {
        set.status = guard.status
        return { error: guard.error }
      }

      const [updated] = await db
        .update(gameVersions)
        .set(body)
        .where(
          and(
            eq(gameVersions.id, params.id),
            eq(gameVersions.gameId, params.gameId),
          ),
        )
        .returning()

      if (!updated) {
        set.status = 404
        return { error: "Version not found" }
      }

      return updated
    },
    {
      params: t.Object({ gameId: t.String(), id: t.String() }),
      body: t.Object({
        buildId: t.Optional(t.String()),
        versionString: t.Optional(t.String()),
        isLatest: t.Optional(t.Boolean()),
      }),
    },
  )
  // DELETE version (admin only)
  .delete(
    "/:id",
    async ({ params, request, set }) => {
      const guard = await requireRole(request.headers, ["admin"])
      if (!guard.ok) {
        set.status = guard.status
        return { error: guard.error }
      }

      const [deleted] = await db
        .delete(gameVersions)
        .where(
          and(
            eq(gameVersions.id, params.id),
            eq(gameVersions.gameId, params.gameId),
          ),
        )
        .returning()

      if (!deleted) {
        set.status = 404
        return { error: "Version not found" }
      }

      return { success: true }
    },
    {
      params: t.Object({ gameId: t.String(), id: t.String() }),
    },
  )

// ── Game Sync Routes ────────────────────────────────────────────────
export const gameSyncRoutes = new Elysia({ prefix: "/games" })
  // Single game sync
  .post(
    "/:gameId/sync",
    async ({ params, request, set }) => {
      const guard = await requireRole(request.headers, ["admin"]);
      if (!guard.ok) {
        set.status = guard.status;
        return { error: guard.error };
      }

      const [game] = await db
        .select({ id: games.id, steamAppId: games.steamAppId })
        .from(games)
        .where(eq(games.id, params.gameId))
        .limit(1);

      if (!game) {
        set.status = 404;
        return { error: "Game not found" };
      }

      if (!game.steamAppId) {
        set.status = 400;
        return { error: "Game has no Steam App ID" };
      }

      const result = await syncSteamGame(game.steamAppId, { forceRetry: true });

      if (!result.success) {
        set.status = 500;
        return { status: "failed", error: result.error };
      }

      return { status: "synced" };
    },
    {
      params: t.Object({ gameId: t.String() }),
    }
  )
  // Bulk sync
  .post(
    "/sync/bulk",
    async ({ body, request, set }) => {
      const guard = await requireRole(request.headers, ["admin"]);
      if (!guard.ok) {
        set.status = guard.status;
        return { error: guard.error };
      }

      let gameIds: string[] = [];

      if (body.mode === "all") {
        const allGames = await db
          .select({ id: games.id })
          .from(games)
          .where(sql`${games.steamAppId} IS NOT NULL`);
        gameIds = allGames.map((g) => g.id);
      } else if (body.mode === "stale") {
        const staleGames = await db
          .select({ id: games.id })
          .from(games)
          .where(
            and(
              sql`${games.steamAppId} IS NOT NULL`,
              or(
                sql`${games.lastSync} IS NULL`,
                sql`${games.lastSync} < NOW() - INTERVAL '7 days'`
              )
            )
          );
        gameIds = staleGames.map((g) => g.id);
      } else {
        gameIds = body.gameIds || [];
      }

      if (gameIds.length === 0) {
        return { queued: 0, message: "No games to sync" };
      }

      // Process syncs sequentially with delay
      let synced = 0;
      let failed = 0;

      for (const gameId of gameIds) {
        const [game] = await db
          .select({ steamAppId: games.steamAppId })
          .from(games)
          .where(eq(games.id, gameId))
          .limit(1);

        if (game?.steamAppId) {
          const result = await syncSteamGame(game.steamAppId, { forceRetry: true });
          if (result.success) synced++;
          else failed++;

          // Rate limit protection
          await new Promise((resolve) => setTimeout(resolve, 500));
        }
      }

      return {
        queued: gameIds.length,
        synced,
        failed,
        message: `Synced ${synced} games, ${failed} failed`,
      };
    },
    {
      body: t.Object({
        gameIds: t.Optional(t.Array(t.String())),
        mode: t.Union([
          t.Literal("selected"),
          t.Literal("all"),
          t.Literal("stale"),
        ]),
      }),
    }
  );