import { describe, it, expect } from "vitest";
import { manualExportProvider } from "../../src/providers/manual-export.js";

// --- Basic structure ---

describe("basic structure", () => {
  it("exports a provider with send method", () => {
    expect(manualExportProvider).toBeDefined();
    expect(typeof manualExportProvider.send).toBe("function");
  });

  it("returns { content: string } shape on success", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test prompt" },
      {},
    );
    expect(result).toHaveProperty("content");
    expect(typeof result.content).toBe("string");
  });

  it("returns non-empty content for valid prompt", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test prompt" },
      {},
    );
    expect(result.content.length).toBeGreaterThan(0);
  });

  it("is deterministic — same input produces same output", async () => {
    const input = { prompt: "deterministic test", input: { question: "hi" } };
    const r1 = await manualExportProvider.send(input, {});
    const r2 = await manualExportProvider.send(input, {});
    expect(r1.content).toBe(r2.content);
  });

  it("does not modify the request object", async () => {
    const req = { prompt: "test", input: { question: "hi" } };
    const original = JSON.stringify(req);
    await manualExportProvider.send(req, {});
    expect(JSON.stringify(req)).toBe(original);
  });

  it("does not modify the config object", async () => {
    const config = { openaiApiKey: "sk-test" };
    await manualExportProvider.send({ prompt: "test" }, config);
    expect(config.openaiApiKey).toBe("sk-test");
  });
});

// --- Copy-ready structure ---

describe("copy-ready structure", () => {
  it("includes MANUAL EXPORT header with tool name", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("MANUAL EXPORT");
  });

  it("includes COPY box with top-left corner delimiters (┌)", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("┌");
  });

  it("includes COPY box with bottom-right corner delimiters (┐ and ┘)", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("┐");
    expect(result.content).toContain("└");
    expect(result.content).toContain("┘");
  });

  it("includes instructions section with numbered steps", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("📝 INSTRUCTIONS:");
    expect(result.content).toContain("1.");
    expect(result.content).toContain("2.");
    expect(result.content).toContain("3.");
  });

  it("includes metadata section", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("📊 METADATA:");
  });

  it("includes provider info in metadata", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("Manual Export");
  });

  it("includes tool name in metadata", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toMatch(/Tool: \w+/);
  });

  it("includes prompt length in metadata with formatted thousands separator", async () => {
    const longPrompt = "x".repeat(12345);
    const result = await manualExportProvider.send(
      { prompt: longPrompt, input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("Prompt Length:");
    expect(result.content).toContain("12,345 characters");
  });

  it("includes advisory footer", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("advisory output only");
  });

  it("wraps each line of prompt in box with │ delimiter", async () => {
    const multiLine = "line one\nline two\nline three";
    const result = await manualExportProvider.send(
      { prompt: multiLine, input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("│ line one");
    expect(result.content).toContain("│ line two");
    expect(result.content).toContain("│ line three");
  });
});

// --- Per-tool detection ---

describe("tool name detection", () => {
  it("detects debug_issue when input has logs", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { logs: "Error: boom" } },
      {},
    );
    expect(result.content).toContain("Tool: debug_issue");
  });

  it("detects review_code when input has relevantFiles with paths", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { relevantFiles: [{ path: "src/foo.js" }] } },
      {},
    );
    expect(result.content).toContain("Tool: review_code");
  });

  it("detects architecture_review when context includes 'architecture'", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { context: "Architecture decision here" } },
      {},
    );
    expect(result.content).toContain("Tool: architecture_review");
  });

  it("detects review_plan when input has projectSummary", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { projectSummary: "Project scope" } },
      {},
    );
    expect(result.content).toContain("Tool: review_plan");
  });

  it("defaults to ask_chatgpt when no hints available", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test", input: { question: "hi" } },
      {},
    );
    expect(result.content).toContain("Tool: ask_chatgpt");
  });

  it("uses 'unknown' when input is absent in request", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test" },
      {},
    );
    expect(result.content).toContain("Tool: unknown");
  });
});

// --- Long prompt handling ---

describe("long prompt handling", () => {
  it("adds warning banner for prompts over 30k characters", async () => {
    const longPrompt = "x".repeat(31_000);
    const result = await manualExportProvider.send({ prompt: longPrompt, input: {} }, {});
    expect(result.content).toContain("⚠️ NOTE");
  });

  it("does NOT add warning for prompts under 30k characters", async () => {
    const validPrompt = "x".repeat(29_999);
    const result = await manualExportProvider.send({ prompt: validPrompt, input: {} }, {});
    expect(result.content).not.toContain("⚠️ NOTE");
  });

  it("still returns valid output for very long prompts (>50k chars)", async () => {
    const veryLongPrompt = "x".repeat(50_000);
    const result = await manualExportProvider.send({ prompt: veryLongPrompt, input: {} }, {});
    expect(result.content).toContain("MANUAL EXPORT");
    expect(result.content.length).toBeGreaterThan(0);
  });

  it("shows correct character count in metadata for long prompts", async () => {
    const length = 50_000;
    const result = await manualExportProvider.send({ prompt: "x".repeat(length), input: {} }, {});
    expect(result.content).toContain(`${length.toLocaleString()} characters`);
  });

  it("handles prompts at exactly the 30k boundary", async () => {
    const exactPrompt = "x".repeat(30_000);
    const result = await manualExportProvider.send({ prompt: exactPrompt, input: {} }, {});
    expect(result.content).not.toContain("⚠️ NOTE"); // not over 30k, exactly at it
  });
});

// --- Unicode and special characters ---

describe("unicode and special characters", () => {
  it("preserves Japanese characters in prompt", async () => {
    const result = await manualExportProvider.send(
      { prompt: "こんにちは世界", input: {} },
      {},
    );
    expect(result.content).toContain("こんにちは世界");
  });

  it("preserves emoji in prompt", async () => {
    const result = await manualExportProvider.send(
      { prompt: "🚀 Launch plan 🎯", input: {} },
      {},
    );
    expect(result.content).toContain("🚀");
    expect(result.content).toContain("🎯");
  });

  it("preserves markdown code blocks in prompt", async () => {
    const codePrompt = "```js\nconst x = 1;\n```";
    const result = await manualExportProvider.send(
      { prompt: codePrompt, input: {} },
      {},
    );
    expect(result.content).toContain("```js");
    expect(result.content).toContain("const x = 1;");
  });

  it("preserves JSON in prompt", async () => {
    const jsonPrompt = '{"key": "value", "nested": {"a": 1}}';
    const result = await manualExportProvider.send(
      { prompt: jsonPrompt, input: {} },
      {},
    );
    expect(result.content).toContain('"key"');
    expect(result.content).toContain('"value"');
  });

  it("preserves special HTML-like characters", async () => {
    const htmlPrompt = '<script>alert("xss")</script>';
    const result = await manualExportProvider.send(
      { prompt: htmlPrompt, input: {} },
      {},
    );
    expect(result.content).toContain('<script>');
    expect(result.content).toContain('"xss"');
  });
});

// --- Empty / edge cases ---

describe("empty and edge case handling", () => {
  it("returns warning content when prompt is empty string", async () => {
    const result = await manualExportProvider.send({ prompt: "", input: {} }, {});
    expect(result.content).toContain("received no prompt to export");
  });

  it("returns warning content when prompt field is missing from request", async () => {
    const result = await manualExportProvider.send({}, {});
    expect(result.content).toContain("received no prompt to export");
  });

  it("returns warning content when request is null", async () => {
    const result = await manualExportProvider.send(null, {});
    expect(result.content).toContain("received no prompt to export");
  });

  it("returns warning content when request is undefined", async () => {
    const result = await manualExportProvider.send(undefined, {});
    expect(result.content).toContain("received no prompt to export");
  });

  it("handles null config gracefully", async () => {
    const result = await manualExportProvider.send({ prompt: "test" }, null);
    expect(result.content).toContain("MANUAL EXPORT");
  });

  it("handles undefined config gracefully", async () => {
    const result = await manualExportProvider.send({ prompt: "test" }, undefined);
    expect(result.content).toContain("MANUAL EXPORT");
  });

  it("handles single-line prompt without newlines", async () => {
    const result = await manualExportProvider.send(
      { prompt: "single line prompt" },
      {},
    );
    expect(result.content).toContain("│ single line prompt");
  });

  it("handles prompts with only whitespace lines", async () => {
    const wsPrompt = "\n\n   \n\t\n";
    const result = await manualExportProvider.send({ prompt: wsPrompt }, {});
    expect(result.content).toContain("MANUAL EXPORT");
  });

  it("preserves tab characters in prompt", async () => {
    const tabPrompt = "first\tsecond\tthird";
    const result = await manualExportProvider.send(
      { prompt: tabPrompt },
      {},
    );
    expect(result.content).toContain(tabPrompt);
  });

  it("preserves newlines within the copy box (each line as │)", async () => {
    const nlPrompt = "line1\nline2\nline3";
    const result = await manualExportProvider.send({ prompt: nlPrompt }, {});
    // Each line should be wrapped with │ prefix
    expect(result.content).toContain("│ line1");
    expect(result.content).toContain("│ line2");
    expect(result.content).toContain("│ line3");
  });
});

// --- Provider contract compliance ---

describe("provider contract compliance", () => {
  it("returns a Promise (async function)", async () => {
    const result = manualExportProvider.send({ prompt: "test" }, {});
    expect(result).toBeInstanceOf(Promise);
    await result; // don't leave unhandled promise
  });

  it("content is always a string, never null or object", async () => {
    const result = await manualExportProvider.send(
      { prompt: "test" },
      {},
    );
    expect(typeof result.content).toBe("string");
    expect(result.content).not.toBeNull();
    expect(result.content).not.toBeInstanceOf(Object);
  });

  it("content does not contain raw JSON (is text output)", async () => {
    const result = await manualExportProvider.send(
      { prompt: '{"json": "in prompt"}' },
      {},
    );
    // The JSON string should appear in the │ wrapped lines, not as a top-level JSON object
    expect(result.content).not.toBe("{" + '"content":"...' + "}");
  });

  it("always resolves (never rejects) for valid inputs", async () => {
    const testCases = [
      { prompt: "hi" },
      { prompt: "" },
      {},
      null,
    ];
    for (const tc of testCases) {
      await expect(manualExportProvider.send(tc, {})).resolves.toBeDefined();
    }
  });

  it("is idempotent — same input always produces same output", async () => {
    const inputs = [
      { prompt: "prompt1", input: { question: "q1" } },
      { prompt: "prompt2\nmultiline" },
      {},
    ];
    for (const input of inputs) {
      const r1 = await manualExportProvider.send(input, {});
      const r2 = await manualExportProvider.send({ ...input }, {});
      expect(r1.content).toBe(r2.content);
    }
  });
});

// --- Integration: separator lines ---

describe("separator formatting", () => {
  it("uses ══ as top and bottom border characters", async () => {
    const result = await manualExportProvider.send({ prompt: "test" }, {});
    // Count border lines — should have exactly 2 (top and bottom)
    const match = result.content.match(/═+/g);
    expect(match).not.toBeNull();
    expect(match.length).toBeGreaterThanOrEqual(2);
  });

  it("has matching top and bottom separator blocks", async () => {
    const result = await manualExportProvider.send({ prompt: "test" }, {});
    const lines = result.content.split("\n");
    expect(lines[0]).toMatch(/═+/);
    expect(lines[lines.length - 1]).toMatch(/═+/);
    // Top and bottom separators should be identical length
    expect(lines[0].length).toBe(lines[lines.length - 1].length);
  });

  it("includes correct number of sections (header, copy box, instructions, metadata, footer)", async () => {
    const result = await manualExportProvider.send({ prompt: "test" }, {});
    expect(result.content).toContain("MANUAL EXPORT");
    expect(result.content).toContain("COPY THIS PROMPT");
    expect(result.content).toContain("INSTRUCTIONS");
    expect(result.content).toContain("METADATA");
    expect(result.content).toContain("advisory output only");
  });
});

// --- Repeatability ---

describe("repeatability", () => {
  it("creates identical providers for same config each time", async () => {
    const results = [];
    for (let i = 0; i < 10; i++) {
      const r = await manualExportProvider.send({ prompt: "test" }, {});
      results.push(r.content);
    }
    expect(results.every((c) => c === results[0])).toBe(true);
  });

  it("does not share mutable state between send calls", async () => {
    const r1 = await manualExportProvider.send({ prompt: "call1" }, {});
    const r2 = await manualExportProvider.send({ prompt: "call2" }, {});
    expect(r1.content).not.toContain("call2");
    expect(r2.content).not.toContain("call1");
  });
});

// --- Visual structure validation ---

describe("visual structure", () => {
  it("copy box has equal left (┌) and right (┐/└/┘) corners", async () => {
    const result = await manualExportProvider.send({ prompt: "test" }, {});
    expect(result.content).toContain("┌");
    expect(result.content).toContain("┐");
    expect(result.content).toContain("└");
    expect(result.content).toContain("┘");
  });

  it("copy box content lines all start with │", async () => {
    const result = await manualExportProvider.send({ prompt: "line1\nline2" }, {});
    const lines = result.content.split("\n");
    // Find the lines between ┌ and ┘ (the copy box content)
    let inBox = false;
    for (const line of lines) {
      if (line.includes("┌─")) {
        inBox = true;
        continue;
      }
      if (line.includes("└─")) {
        inBox = false;
        continue;
      }
      if (inBox && !line.includes("📋")) {
        // Content lines inside box should start with │
        expect(line.startsWith("│ ")).toBe(true);
      }
    }
  });

  it("instructions section lists exactly 5 numbered steps", async () => {
    const result = await manualExportProvider.send({ prompt: "test" }, {});
    const instructionsMatch = result.content.match(/📝 INSTRUCTIONS:\n([\s\S]*?)(?=\n\n|$)/);
    expect(instructionsMatch).not.toBeNull();
    const stepLines = instructionsMatch[1].trim().split("\n").filter((l) => /^\d+\./.test(l.trim()));
    expect(stepLines.length).toBe(5);
  });

  it("tool-specific content varies by detected tool", async () => {
    const resultAsk = await manualExportProvider.send(
      { prompt: "t", input: { question: "q" } },
      {},
    );
    const resultDebug = await manualExportProvider.send(
      { prompt: "t", input: { logs: "err" } },
      {},
    );
    expect(resultAsk.content).toContain("ask_chatgpt");
    expect(resultDebug.content).toContain("debug_issue");
    expect(resultAsk.content).not.toContain("debug_issue");
    expect(resultDebug.content).not.toContain("ask_chatgpt");
  });
});