import { describe, test, expect } from "bun:test";
import {
  getAutomationStateSnapshot,
  getAutomationStateEventPayload,
  automationStatesEqual,
} from "../services/automationState";
import type { AutomationStateResponse } from "../types/api";

// =============================================================================
// normalizeAutomationState (via getAutomationStateSnapshot)
// =============================================================================

describe("normalizeAutomationState", () => {
  test("returns undefined when metadata has no automation_state key", () => {
    expect(getAutomationStateSnapshot({})).toBeUndefined();
    expect(getAutomationStateSnapshot({ other: true })).toBeUndefined();
    expect(getAutomationStateSnapshot(null)).toBeUndefined();
    expect(getAutomationStateSnapshot(undefined)).toBeUndefined();
  });

  test("returns disabled state for null automation_state", () => {
    const result = getAutomationStateSnapshot({ automation_state: null });
    expect(result).toEqual({
      enabled: false,
      phase: null,
      next_tick_at: null,
      sleep_until: null,
    });
  });

  test("returns disabled state for non-object automation_state", () => {
    for (const val of ["string", 123, true, []]) {
      const result = getAutomationStateSnapshot({ automation_state: val });
      expect(result?.enabled).toBe(false);
    }
  });

  test("normalizes enabled: true correctly", () => {
    const result = getAutomationStateSnapshot({ automation_state: { enabled: true } });
    expect(result?.enabled).toBe(true);
  });

  test("normalizes enabled to false for non-true values", () => {
    const result = getAutomationStateSnapshot({ automation_state: { enabled: "yes" } });
    expect(result?.enabled).toBe(false);
  });

  test("accepts phase: standby", () => {
    const result = getAutomationStateSnapshot({ automation_state: { enabled: true, phase: "standby" } });
    expect(result?.phase).toBe("standby");
  });

  test("accepts phase: sleeping", () => {
    const result = getAutomationStateSnapshot({ automation_state: { enabled: true, phase: "sleeping" } });
    expect(result?.phase).toBe("sleeping");
  });

  test("rejects invalid phase values", () => {
    for (const phase of ["running", "idle", "active", "", null]) {
      const result = getAutomationStateSnapshot({ automation_state: { enabled: true, phase } });
      expect(result?.phase).toBeNull();
    }
  });

  test("normalizes next_tick_at as number", () => {
    const result = getAutomationStateSnapshot({ automation_state: { enabled: true, next_tick_at: 12345 } });
    expect(result?.next_tick_at).toBe(12345);
  });

  test("normalizes next_tick_at as null for non-number", () => {
    const result = getAutomationStateSnapshot({ automation_state: { enabled: true, next_tick_at: "soon" } });
    expect(result?.next_tick_at).toBeNull();
  });

  test("normalizes sleep_until as number", () => {
    const result = getAutomationStateSnapshot({ automation_state: { enabled: true, sleep_until: 99999 } });
    expect(result?.sleep_until).toBe(99999);
  });

  test("normalizes sleep_until as null for non-number", () => {
    const result = getAutomationStateSnapshot({ automation_state: { enabled: true, sleep_until: false } });
    expect(result?.sleep_until).toBeNull();
  });

  test("fully normalizes a complete valid state", () => {
    const result = getAutomationStateSnapshot({
      automation_state: { enabled: true, phase: "sleeping", next_tick_at: 100, sleep_until: 200 },
    });
    expect(result).toEqual({
      enabled: true,
      phase: "sleeping",
      next_tick_at: 100,
      sleep_until: 200,
    });
  });
});

// =============================================================================
// getAutomationStateEventPayload
// =============================================================================

describe("getAutomationStateEventPayload", () => {
  test("returns disabled default when no automation_state in metadata", () => {
    const result = getAutomationStateEventPayload({});
    expect(result).toEqual({
      enabled: false,
      phase: null,
      next_tick_at: null,
      sleep_until: null,
    });
  });

  test("returns disabled default for null metadata", () => {
    const result = getAutomationStateEventPayload(null);
    expect(result).toEqual({
      enabled: false,
      phase: null,
      next_tick_at: null,
      sleep_until: null,
    });
  });

  test("returns normalized state when automation_state present", () => {
    const result = getAutomationStateEventPayload({
      automation_state: { enabled: true, phase: "standby", next_tick_at: 50, sleep_until: 60 },
    });
    expect(result).toEqual({
      enabled: true,
      phase: "standby",
      next_tick_at: 50,
      sleep_until: 60,
    });
  });

  test("returns a new object each call (not frozen reference)", () => {
    const a = getAutomationStateEventPayload({});
    const b = getAutomationStateEventPayload({});
    expect(a).toEqual(b);
    expect(a).not.toBe(b);
  });
});

// =============================================================================
// automationStatesEqual
// =============================================================================

describe("automationStatesEqual", () => {
  const base: AutomationStateResponse = {
    enabled: true,
    phase: "standby",
    next_tick_at: 100,
    sleep_until: 200,
  };

  test("returns true for identical states", () => {
    expect(automationStatesEqual(base, { ...base })).toBe(true);
  });

  test("returns false when enabled differs", () => {
    expect(automationStatesEqual(base, { ...base, enabled: false })).toBe(false);
  });

  test("returns false when phase differs", () => {
    expect(automationStatesEqual(base, { ...base, phase: "sleeping" })).toBe(false);
    expect(automationStatesEqual(base, { ...base, phase: null })).toBe(false);
  });

  test("returns false when next_tick_at differs", () => {
    expect(automationStatesEqual(base, { ...base, next_tick_at: 999 })).toBe(false);
    expect(automationStatesEqual(base, { ...base, next_tick_at: null })).toBe(false);
  });

  test("returns false when sleep_until differs", () => {
    expect(automationStatesEqual(base, { ...base, sleep_until: 999 })).toBe(false);
    expect(automationStatesEqual(base, { ...base, sleep_until: null })).toBe(false);
  });

  test("returns true when both are disabled defaults", () => {
    const disabled: AutomationStateResponse = { enabled: false, phase: null, next_tick_at: null, sleep_until: null };
    expect(automationStatesEqual(disabled, { ...disabled })).toBe(true);
  });
});