"""
Tests for DealFlow AI custom tools.
Runs without LLM/CrewAI — tests tool logic in isolation.
"""
from __future__ import annotations

import json
import os
import sys
import tempfile
from pathlib import Path

import pytest

sys.path.insert(0, str(Path(__file__).parent.parent))


# ─── PDFExtractorTool ─────────────────────────────────────────────────────────

class TestPDFExtractorTool:
    def test_rejects_nonexistent_file(self):
        from src.tools.pdf_extractor import PDFExtractorTool
        tool = PDFExtractorTool()
        result = json.loads(tool._run("/nonexistent/file.pdf"))
        assert "error" in result

    def test_rejects_non_pdf(self, tmp_path):
        from src.tools.pdf_extractor import PDFExtractorTool
        txt_file = tmp_path / "deck.txt"
        txt_file.write_text("not a pdf")
        tool = PDFExtractorTool()
        result = json.loads(tool._run(str(txt_file)))
        assert "error" in result

    def test_extracts_real_pdf(self, tmp_path):
        """Create a minimal PDF using reportlab if available, else skip."""
        try:
            from reportlab.pdfgen import canvas
        except ImportError:
            pytest.skip("reportlab not installed")

        pdf_path = tmp_path / "test_deck.pdf"
        c = canvas.Canvas(str(pdf_path))
        c.drawString(100, 750, "Acme AI - Pitch Deck")
        c.drawString(100, 720, "Market Size: $10B TAM")
        c.save()

        from src.tools.pdf_extractor import PDFExtractorTool
        tool = PDFExtractorTool()
        result = json.loads(tool._run(str(pdf_path)))
        assert "total_pages" in result
        assert result["total_pages"] >= 1
        assert "full_text" in result


# ─── ChartGeneratorTool ───────────────────────────────────────────────────────

class TestChartGeneratorTool:
    def test_generates_bar_chart(self, tmp_path):
        from src.tools.chart_generator import ChartGeneratorTool
        tool = ChartGeneratorTool(output_dir=str(tmp_path))
        input_data = json.dumps({
            "chart_type": "bar",
            "title": "Test Revenue",
            "labels": ["Y1", "Y2", "Y3"],
            "values": [100000, 500000, 2000000],
            "output_dir": str(tmp_path),
        })
        result = tool._run(input_data)
        assert "Chart saved to:" in result
        png_files = list(tmp_path.glob("*.png"))
        assert len(png_files) == 1

    def test_generates_line_chart(self, tmp_path):
        from src.tools.chart_generator import ChartGeneratorTool
        tool = ChartGeneratorTool(output_dir=str(tmp_path))
        input_data = json.dumps({
            "chart_type": "line",
            "title": "MRR Growth",
            "labels": ["Jan", "Feb", "Mar", "Apr"],
            "values": [10000, 15000, 22000, 35000],
            "output_dir": str(tmp_path),
        })
        result = tool._run(input_data)
        assert "Chart saved to:" in result

    def test_rejects_mismatched_lengths(self, tmp_path):
        from src.tools.chart_generator import ChartGeneratorTool
        tool = ChartGeneratorTool(output_dir=str(tmp_path))
        input_data = json.dumps({
            "chart_type": "bar",
            "title": "Bad",
            "labels": ["A", "B"],
            "values": [1, 2, 3],
        })
        result = tool._run(input_data)
        assert "Error" in result

    def test_rejects_invalid_json(self, tmp_path):
        from src.tools.chart_generator import ChartGeneratorTool
        tool = ChartGeneratorTool(output_dir=str(tmp_path))
        result = tool._run("not valid json")
        assert "Error" in result


# ─── MemoWriterTool ───────────────────────────────────────────────────────────

class TestMemoWriterTool:
    def test_saves_memo(self, tmp_path):
        from src.tools.memo_writer import MemoWriterTool
        tool = MemoWriterTool(output_dir=str(tmp_path))
        memo_text = "# Investment Memo\n\n## Recommendation: INVEST\n"
        input_data = json.dumps({
            "company_name": "Acme AI",
            "memo_content": memo_text,
            "output_dir": str(tmp_path),
        })
        result = tool._run(input_data)
        assert "Investment memo saved to:" in result

        saved_files = list(tmp_path.glob("memo_*.md"))
        assert len(saved_files) == 1
        content = saved_files[0].read_text()
        assert "Investment Memo" in content

    def test_rejects_empty_content(self, tmp_path):
        from src.tools.memo_writer import MemoWriterTool
        tool = MemoWriterTool(output_dir=str(tmp_path))
        input_data = json.dumps({
            "company_name": "Acme",
            "memo_content": "",
        })
        result = tool._run(input_data)
        assert "Error" in result

    def test_rejects_invalid_json(self, tmp_path):
        from src.tools.memo_writer import MemoWriterTool
        tool = MemoWriterTool(output_dir=str(tmp_path))
        result = tool._run("{bad json")
        assert "Error" in result