async function createPlugin(ctx) {
  let lastAzimuth = Number(ctx.getSetting("defaultAzimuth", ctx.env.ROTOR_DEFAULT_AZIMUTH || 0));
  const simulate = typeof ctx.simulateHardware === "boolean"
    ? ctx.simulateHardware
    : (process.platform !== "linux" && String(ctx.env.ALLOW_NON_LINUX_CMDS || "false") !== "true");

  return {
    async execute(action, input) {
      if (action === "getAzimuth") {
        return getRotorStatus(ctx, simulate, () => lastAzimuth, (value) => {
          lastAzimuth = value;
        });
      }
      if (action !== "setAzimuth") {
        throw new Error(`Unknown action: ${action}`);
      }
      const target = Number(input && input.target);
      if (!Number.isFinite(target) || target < 0 || target > 360) {
        throw new Error("target muss zwischen 0 und 360 sein");
      }

      const template = String(ctx.getSetting("setTemplate", ctx.env.ROTOR_SET_CMD_TEMPLATE || "")).trim();
      if (template) {
        if (simulate) {
          lastAzimuth = target;
          return {
            ok: true,
            skipped: true,
            message: `Rotor auf ${target} Grad simuliert (${ctx.execMode || "dev"})`
          };
        }
        const command = template.replace(/\{az\}/g, String(target));
        const result = await ctx.commandRunner(command, {
          timeoutMs: Number(ctx.env.ROTOR_SET_TIMEOUT_MS || 20000)
        });
        if (!result.ok) {
          throw new Error(result.stderr || result.error || "Rotor set failed");
        }
      }

      lastAzimuth = target;
      ctx.emit("ui.control.state.changed", {
        controlId: "rotor-main",
        data: { azimuth: lastAzimuth, moving: false }
      });
      return {
        ok: true,
        message: `Rotor auf ${target} Grad gesetzt`
      };
    },
    async getStatus() {
      return getRotorStatus(ctx, simulate, () => lastAzimuth, (value) => {
        lastAzimuth = value;
      });
    },
    async health() {
      return { ok: true };
    }
  };
}

async function getRotorStatus(ctx, simulate, getLastAzimuth, setLastAzimuth) {
  const getCmd = String(ctx.getSetting("getCommand", ctx.env.ROTOR_GET_CMD || "")).trim();
  if (getCmd) {
    if (simulate) {
      return {
        azimuth: getLastAzimuth(),
        moving: false,
        min: 0,
        max: 360
      };
    }
    const result = await ctx.commandRunner(getCmd, {
      timeoutMs: Number(ctx.env.ROTOR_GET_TIMEOUT_MS || 10000)
    });
    if (result.ok) {
      const parsed = Number(String(result.stdout).split(/\s+/)[0]);
      if (Number.isFinite(parsed)) {
        setLastAzimuth(parsed < 0 ? parsed + 360 : parsed);
      }
    }
  }
  return {
    azimuth: getLastAzimuth(),
    moving: false,
    min: 0,
    max: 360
  };
}

module.exports = {
  createPlugin
};