# Copyright © 2025-26 l5yth & contributors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# frozen_string_literal: true

require "spec_helper"
require "sqlite3"

RSpec.describe PotatoMesh::App::DataProcessing do
  # Build a minimal host class so we can call the module methods in isolation.
  let(:harness_class) do
    Class.new do
      include PotatoMesh::App::DataProcessing
      include PotatoMesh::App::Helpers

      def debug_log(message, **); end

      def warn_log(message, **); end

      def with_busy_retry
        yield
      end

      def update_prometheus_metrics(*); end

      def prom_report_ids
        []
      end

      def private_mode?
        false
      end

      def normalize_node_id(_db, node_ref)
        parts = canonical_node_parts(node_ref)
        parts ? parts[0] : nil
      end

      def resolve_protocol(_db, _ingestor, cache: nil)
        "meshtastic"
      end
    end
  end

  subject(:dp) { harness_class.new }

  # ---------------------------------------------------------------------------
  # coerce_bool
  # ---------------------------------------------------------------------------
  describe "#coerce_bool" do
    it "converts true to 1" do
      expect(dp.coerce_bool(true)).to eq(1)
    end

    it "converts false to 0" do
      expect(dp.coerce_bool(false)).to eq(0)
    end

    it "passes through other values unchanged" do
      expect(dp.coerce_bool(nil)).to be_nil
      expect(dp.coerce_bool("yes")).to eq("yes")
      expect(dp.coerce_bool(42)).to eq(42)
    end
  end

  # ---------------------------------------------------------------------------
  # resolve_node_num
  # ---------------------------------------------------------------------------
  describe "#resolve_node_num" do
    it "returns an integer payload num directly" do
      expect(dp.resolve_node_num("!aabbccdd", { "num" => 0xaabbccdd })).to eq(0xaabbccdd)
    end

    it "handles a numeric (non-integer) payload num" do
      expect(dp.resolve_node_num("!aabbccdd", { "num" => 305_441_741.0 })).to eq(305_441_741)
    end

    it "parses a decimal string num" do
      expect(dp.resolve_node_num("!aabbccdd", { "num" => "12345" })).to eq(12345)
    end

    it "parses a hex-prefixed string num" do
      expect(dp.resolve_node_num("!aabbccdd", { "num" => "0xAABBCCDD" })).to eq(0xaabbccdd)
    end

    it "falls back to node_id hex when num is absent" do
      expect(dp.resolve_node_num("!aabbccdd", {})).to eq(0xaabbccdd)
    end

    it "returns nil for invalid inputs" do
      expect(dp.resolve_node_num(nil, {})).to be_nil
    end
  end

  # ---------------------------------------------------------------------------
  # canonical_node_parts
  # ---------------------------------------------------------------------------
  describe "#canonical_node_parts" do
    it "parses !hex notation" do
      parts = dp.canonical_node_parts("!aabbccdd")
      expect(parts).not_to be_nil
      expect(parts[0]).to eq("!aabbccdd")
      expect(parts[1]).to eq(0xaabbccdd)
    end

    it "parses a numeric node_ref" do
      parts = dp.canonical_node_parts(0xaabbccdd)
      expect(parts).not_to be_nil
      expect(parts[0]).to start_with("!")
      expect(parts[1]).to eq(0xaabbccdd)
    end

    it "returns nil for an invalid string" do
      expect(dp.canonical_node_parts("not_a_node")).to be_nil
    end

    it "returns nil for nil without a fallback" do
      expect(dp.canonical_node_parts(nil)).to be_nil
    end

    it "uses fallback_num when node_ref is nil" do
      parts = dp.canonical_node_parts(nil, 0xaabbccdd)
      expect(parts).not_to be_nil
      expect(parts[1]).to eq(0xaabbccdd)
    end
  end

  # ---------------------------------------------------------------------------
  # insert_telemetry (telemetry_type validation path)
  # ---------------------------------------------------------------------------
  describe "#insert_telemetry" do
    around do |example|
      Dir.mktmpdir("dp-spec-") do |dir|
        db_path = File.join(dir, "mesh.db")

        RSpec::Mocks.with_temporary_scope do
          allow(PotatoMesh::Config).to receive(:db_path).and_return(db_path)
          allow(PotatoMesh::Config).to receive(:db_busy_timeout_ms).and_return(5000)
          allow(PotatoMesh::Config).to receive(:week_seconds).and_return(604_800)
          allow(PotatoMesh::Config).to receive(:trace_neighbor_window_seconds).and_return(604_800)
          allow(PotatoMesh::Config).to receive(:debug?).and_return(false)
          db_helper = Object.new.extend(PotatoMesh::App::Database)
          db_helper.init_db
          db_helper.ensure_schema_upgrades
          example.run
        end
      end
    end

    def open_db
      db = SQLite3::Database.new(PotatoMesh::Config.db_path)
      db.results_as_hash = true
      db
    end

    let(:now) { Time.now.to_i }

    let(:valid_payload) do
      {
        "id" => 42,
        "node_id" => "!aabbccdd",
        "rx_time" => now,
        "telemetry_type" => "device",
        "deviceMetrics" => { "batteryLevel" => 80 },
      }
    end

    it "inserts a telemetry row with a valid telemetry_type" do
      db = open_db
      dp.insert_telemetry(db, valid_payload)
      row = db.execute("SELECT telemetry_type FROM telemetry WHERE id = 42").first
      db.close
      expect(row["telemetry_type"]).to eq("device")
    end

    it "treats invalid telemetry_type values as nil (auto-inferred)" do
      db = open_db
      payload = valid_payload.merge("telemetry_type" => "bogus_type")
      dp.insert_telemetry(db, payload)
      row = db.execute("SELECT telemetry_type FROM telemetry WHERE id = 42").first
      db.close
      # "bogus_type" is not in VALID_TELEMETRY_TYPES; the value should be
      # replaced by the auto-inferred type ("device") since deviceMetrics is present.
      expect(%w[device nil]).to include(row["telemetry_type"].to_s)
    end

    it "returns nil for a non-hash payload" do
      db = open_db
      result = dp.insert_telemetry(db, "not a hash")
      db.close
      expect(result).to be_nil
    end

    it "returns nil when no telemetry id is present" do
      db = open_db
      result = dp.insert_telemetry(db, { "node_id" => "!aabbccdd" })
      db.close
      expect(result).to be_nil
    end
  end
end