require "rails_helper"

RSpec.describe MaintenanceScheduleStatus do
  it "marks a schedule overdue when the mileage interval is reached" do
    schedule = build(:maintenance_schedule, mileage_interval: 5_000, baseline_odometer: 10_000, time_interval: 180)

    status = described_class.new(schedule, nil, current_odometer: 15_000)

    expect(status.status).to eq("overdue")
    expect(status.reason).to include("mileage interval reached")
  end

  it "marks a schedule overdue when the time interval is reached" do
    schedule = build(:maintenance_schedule, time_interval: 180, baseline_date: Date.current - 180.days)

    status = described_class.new(schedule, nil, current_odometer: 10_000)

    expect(status.status).to eq("overdue")
    expect(status.reason).to include("time interval reached")
  end

  it "marks a schedule upcoming within five percent of the mileage interval" do
    schedule = build(:maintenance_schedule, mileage_interval: 5_000, baseline_odometer: 10_000, baseline_date: Date.current)

    status = described_class.new(schedule, nil, current_odometer: 14_750)

    expect(status.status).to eq("upcoming")
    expect(status.reason).to include("within 250 miles")
  end

  it "marks a schedule upcoming within five percent of the time interval" do
    schedule = build(:maintenance_schedule, time_interval: 180, baseline_date: Date.current - 171.days)

    status = described_class.new(schedule, nil, current_odometer: 10_000)

    expect(status.status).to eq("upcoming")
    expect(status.reason).to include("within 9 days")
  end

  it "marks a no-history schedule as no history when it is not upcoming or overdue" do
    schedule = build(:maintenance_schedule, baseline_odometer: 10_000, mileage_interval: 5_000, baseline_date: Date.current)

    status = described_class.new(schedule, nil, current_odometer: 10_100)

    expect(status.status).to eq("no_history")
  end

  it "marks a schedule current when matching history exists and no interval is near" do
    schedule = build(:maintenance_schedule, mileage_interval: 5_000, time_interval: 180)
    entry = build(:maintenance_entry, odometer: 12_000, date: Date.current - 10.days)

    status = described_class.new(schedule, entry, current_odometer: 12_500)

    expect(status.status).to eq("current")
    expect(status.due_odometer).to eq(17_000)
    expect(status.due_date).to eq(entry.date + 180.days)
  end
end