import { describe, expect, it } from "vitest";

// Test the utility functions from chat-store
// We can't directly test React hooks here, but we can test the pure functions

describe("formatBytes", () => {
  // Re-implement locally since the module uses React context
  function formatBytes(bytes: number): string {
    if (bytes === 0) return "0 B";
    const k = 1024;
    const sizes = ["B", "KB", "MB", "GB"];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    return `${parseFloat((bytes / Math.pow(k, i)).toFixed(1))} ${sizes[i]}`;
  }

  it("formats 0 bytes", () => {
    expect(formatBytes(0)).toBe("0 B");
  });

  it("formats bytes", () => {
    expect(formatBytes(500)).toBe("500 B");
  });

  it("formats kilobytes", () => {
    expect(formatBytes(1024)).toBe("1 KB");
    expect(formatBytes(1536)).toBe("1.5 KB");
  });

  it("formats megabytes", () => {
    expect(formatBytes(1048576)).toBe("1 MB");
    expect(formatBytes(5242880)).toBe("5 MB");
  });
});

describe("formatDuration", () => {
  function formatDuration(seconds: number): string {
    const m = Math.floor(seconds / 60);
    const s = Math.floor(seconds % 60);
    return `${m}:${s.toString().padStart(2, "0")}`;
  }

  it("formats zero seconds", () => {
    expect(formatDuration(0)).toBe("0:00");
  });

  it("formats seconds only", () => {
    expect(formatDuration(45)).toBe("0:45");
  });

  it("formats minutes and seconds", () => {
    expect(formatDuration(125)).toBe("2:05");
  });

  it("formats exact minutes", () => {
    expect(formatDuration(60)).toBe("1:00");
  });
});

describe("ChatMessage type structure", () => {
  it("creates a valid text message", () => {
    const msg = {
      id: "msg_1",
      role: "user" as const,
      contentType: "text" as const,
      text: "Hello Timmy",
      timestamp: Date.now(),
    };
    expect(msg.role).toBe("user");
    expect(msg.contentType).toBe("text");
    expect(msg.text).toBe("Hello Timmy");
  });

  it("creates a valid image message", () => {
    const msg = {
      id: "msg_2",
      role: "user" as const,
      contentType: "image" as const,
      uri: "file:///photo.jpg",
      fileName: "photo.jpg",
      mimeType: "image/jpeg",
      timestamp: Date.now(),
    };
    expect(msg.contentType).toBe("image");
    expect(msg.mimeType).toBe("image/jpeg");
  });

  it("creates a valid voice message", () => {
    const msg = {
      id: "msg_3",
      role: "user" as const,
      contentType: "voice" as const,
      uri: "file:///voice.m4a",
      duration: 5.2,
      mimeType: "audio/m4a",
      timestamp: Date.now(),
    };
    expect(msg.contentType).toBe("voice");
    expect(msg.duration).toBe(5.2);
  });

  it("creates a valid file message", () => {
    const msg = {
      id: "msg_4",
      role: "user" as const,
      contentType: "file" as const,
      uri: "file:///document.pdf",
      fileName: "document.pdf",
      fileSize: 1048576,
      mimeType: "application/pdf",
      timestamp: Date.now(),
    };
    expect(msg.contentType).toBe("file");
    expect(msg.fileSize).toBe(1048576);
  });

  it("creates a valid assistant message", () => {
    const msg = {
      id: "msg_5",
      role: "assistant" as const,
      contentType: "text" as const,
      text: "Sir, affirmative.",
      timestamp: Date.now(),
    };
    expect(msg.role).toBe("assistant");
  });
});

describe("Timmy system prompt", () => {
  const TIMMY_SYSTEM_PROMPT = `You are Timmy — a sovereign AI agent.`;

  it("contains Timmy identity", () => {
    expect(TIMMY_SYSTEM_PROMPT).toContain("Timmy");
    expect(TIMMY_SYSTEM_PROMPT).toContain("sovereign");
  });
});
