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import { describe, expect, it } from "vitest";
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import { parseAiBlocksFromText, isSingleInlineParagraph, getInlineTextFromParagraph } from "@/client/lib/ai/blocks";
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describe("parseAiBlocksFromText", () => {
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  it("returns no blocks for empty or whitespace-only input", () => {
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    expect(parseAiBlocksFromText("")).toEqual([]);
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    expect(parseAiBlocksFromText("   \n  \n")).toEqual([]);
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  });
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  it("collapses a single paragraph into one inline paragraph", () => {
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    const blocks = parseAiBlocksFromText("Hello world.");
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    expect(blocks).toHaveLength(1);
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    expect(isSingleInlineParagraph(blocks)).toBe(true);
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    expect(getInlineTextFromParagraph(blocks[0])).toBe("Hello world.");
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  });
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  it("joins soft line breaks within a paragraph with spaces", () => {
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    const blocks = parseAiBlocksFromText("Line one\nLine two");
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    expect(blocks).toHaveLength(1);
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    expect(getInlineTextFromParagraph(blocks[0])).toBe("Line one Line two");
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  });
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  it("splits paragraphs on double newline", () => {
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    const blocks = parseAiBlocksFromText("First paragraph.\n\nSecond paragraph.");
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    expect(blocks).toHaveLength(2);
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    expect(blocks[0]).toEqual({ type: "paragraph", content: [{ type: "text", text: "First paragraph." }] });
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    expect(blocks[1]).toEqual({ type: "paragraph", content: [{ type: "text", text: "Second paragraph." }] });
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  });
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  it("groups adjacent bullet lines into a bulletList", () => {
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    const blocks = parseAiBlocksFromText("- First idea\n- Second idea\n- Third idea");
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    expect(blocks).toHaveLength(1);
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    expect(blocks[0]).toEqual({
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      type: "bulletList",
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      content: [
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        { type: "listItem", content: [{ type: "paragraph", content: [{ type: "text", text: "First idea" }] }] },
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        { type: "listItem", content: [{ type: "paragraph", content: [{ type: "text", text: "Second idea" }] }] },
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        { type: "listItem", content: [{ type: "paragraph", content: [{ type: "text", text: "Third idea" }] }] },
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      ],
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    });
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  });
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  it("accepts asterisk bullet markers", () => {
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    const blocks = parseAiBlocksFromText("* alpha\n* beta");
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    expect(blocks[0]).toMatchObject({ type: "bulletList" });
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    if (blocks[0].type === "bulletList") {
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      expect(blocks[0].content).toHaveLength(2);
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    }
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  });
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  it("preserves paragraph + bullet list mix", () => {
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    const blocks = parseAiBlocksFromText("Intro sentence.\n\n- one\n- two\n\nOutro sentence.");
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    expect(blocks).toHaveLength(3);
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    expect(blocks[0]).toMatchObject({ type: "paragraph" });
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    expect(blocks[1]).toMatchObject({ type: "bulletList" });
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    expect(blocks[2]).toMatchObject({ type: "paragraph" });
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  });
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  it("does not treat mixed non-bullet lines as a bullet list", () => {
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    const blocks = parseAiBlocksFromText("- not a list\nregular text");
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    expect(blocks).toHaveLength(1);
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    expect(blocks[0]).toMatchObject({ type: "paragraph" });
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  });
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  it("normalizes CRLF line endings", () => {
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    const blocks = parseAiBlocksFromText("First.\r\n\r\nSecond.");
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    expect(blocks).toHaveLength(2);
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  });
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});