"""
Tests for the document commands in the CLI.
    - create
    - retrieve
    - list
    - delete
    - list-chunks
    - list-collections
    x ingest-files-from-url
    x extract
    x list-entities
    x list-relationships
    x create-sample
    x create-samples
"""

import contextlib
import json
import os
import tempfile
import uuid

import pytest
from click.testing import CliRunner

from cli.commands.documents import (
    create,
    delete,
    list,
    list_chunks,
    list_collections,
    retrieve,
)
from r2r import R2RAsyncClient
from tests.cli.async_invoke import async_invoke


@pytest.fixture
def temp_text_file():
    """Create a temporary text file for testing."""
    with tempfile.NamedTemporaryFile(
        mode="w", suffix=".txt", delete=False
    ) as f:
        f.write("This is test content for document testing.")
        temp_path = f.name

    yield temp_path

    # Cleanup temp file
    if os.path.exists(temp_path):
        os.unlink(temp_path)


@pytest.fixture
def temp_json_file():
    """Create a temporary JSON file for testing."""
    with tempfile.NamedTemporaryFile(
        mode="w", suffix=".json", delete=False
    ) as f:
        json.dump({"test": "content", "for": "document testing"}, f)
        temp_path = f.name

    yield temp_path

    # Cleanup temp file
    if os.path.exists(temp_path):
        os.unlink(temp_path)


def extract_json_block(output: str) -> dict:
    """Extract and parse the first valid JSON object found in the output."""
    # We assume the output contains at least one JSON object printed with json.dumps(indent=2).
    # We'll find the first '{' and the matching closing '}' that forms a valid JSON object.
    start = output.find("{")
    if start == -1:
        raise ValueError("No JSON object start found in output")

    # Track braces to find the matching '}'
    brace_count = 0
    for i, char in enumerate(output[start:], start=start):
        if char == "{":
            brace_count += 1
        elif char == "}":
            brace_count -= 1

            if brace_count == 0:
                # Found the matching closing brace
                json_str = output[start : i + 1].strip()
                return json.loads(json_str)
    raise ValueError("No complete JSON object found in output")


@pytest.mark.asyncio
async def test_document_lifecycle(temp_text_file):
    """Test the complete lifecycle of a document: create, retrieve, delete."""
    client = R2RAsyncClient(base_url="http://localhost:7272")
    runner = CliRunner(mix_stderr=False)

    # Create document
    create_result = await async_invoke(
        runner, create, temp_text_file, obj=client
    )
    assert create_result.exit_code == 0, create_result.stdout_bytes.decode()

    output = create_result.stdout_bytes.decode()
    create_response = extract_json_block(output)
    document_id = create_response["results"]["document_id"]

    try:
        # Retrieve document
        retrieve_result = await async_invoke(
            runner, retrieve, document_id, obj=client
        )
        assert (
            retrieve_result.exit_code == 0
        ), retrieve_result.stdout_bytes.decode()

        # Instead of parsing JSON, verify the ID appears in the table output
        retrieve_output = retrieve_result.stdout_bytes.decode()
        assert document_id in retrieve_output

        # List chunks
        list_chunks_result = await async_invoke(
            runner, list_chunks, document_id, obj=client
        )
        assert (
            list_chunks_result.exit_code == 0
        ), list_chunks_result.stdout_bytes.decode()

        # List collections
        list_collections_result = await async_invoke(
            runner, list_collections, document_id, obj=client
        )
        assert (
            list_collections_result.exit_code == 0
        ), list_collections_result.stdout_bytes.decode()
    finally:
        # Delete document
        delete_result = await async_invoke(
            runner, delete, document_id, obj=client
        )
        assert (
            delete_result.exit_code == 0
        ), delete_result.stdout_bytes.decode()


@pytest.mark.asyncio
async def test_create_multiple_documents(temp_text_file, temp_json_file):
    """Test creating multiple documents with metadata."""
    client = R2RAsyncClient(base_url="http://localhost:7272")
    runner = CliRunner(mix_stderr=False)

    metadatas = json.dumps(
        [
            {"description": "Test document 1"},
            {"description": "Test document 2"},
        ]
    )

    create_result = await async_invoke(
        runner,
        create,
        temp_text_file,
        temp_json_file,
        "--metadatas",
        metadatas,
        obj=client,
    )
    assert create_result.exit_code == 0, create_result.stdout_bytes.decode()

    output = create_result.stdout_bytes.decode()
    # The command may print multiple JSON objects separated by dashes and status lines.
    # Extract all JSON objects.
    json_objects = []
    start_idx = 0
    while True:
        try:
            # Attempt to extract a JSON object from output[start_idx:]
            block = extract_json_block(output[start_idx:])
            json_objects.append(block)
            # Move start_idx beyond this block to find the next one
            next_start = output[start_idx:].find("{")
            start_idx += output[start_idx:].find("{") + 1
            # Move past the first '{' we found
            # Actually, let's break after one extraction to avoid infinite loops if the output is large.
            # Instead, we find multiple objects by splitting on the line of dashes:
            break
        except ValueError:
            break

    # Alternatively, if multiple objects are separated by "----------", we can split and parse each:
    # This assumes each block between "----------" lines contains exactly one JSON object.
    blocks = output.split("-" * 40)
    json_objects = []
    for block in blocks:
        block = block.strip()
        if '"results"' in block and "{" in block and "}" in block:
            with contextlib.suppress(ValueError):
                json_objects.append(extract_json_block(block))

    assert (
        len(json_objects) == 2
    ), f"Expected 2 JSON objects, got {len(json_objects)}: {output}"

    document_ids = [obj["results"]["document_id"] for obj in json_objects]

    try:
        # List all documents
        list_result = await async_invoke(runner, list, obj=client)
        assert list_result.exit_code == 0, list_result.stdout_bytes.decode()

        # Verify both documents were created
        for doc_id in document_ids:
            retrieve_result = await async_invoke(
                runner, retrieve, doc_id, obj=client
            )
            assert (
                retrieve_result.exit_code == 0
            ), retrieve_result.stdout_bytes.decode()
    finally:
        # Cleanup - delete all created documents
        for doc_id in document_ids:
            delete_result = await async_invoke(
                runner, delete, doc_id, obj=client
            )
            assert (
                delete_result.exit_code == 0
            ), delete_result.stdout_bytes.decode()


@pytest.mark.asyncio
async def test_create_with_custom_id():
    """Test creating a document with a custom ID."""
    client = R2RAsyncClient(base_url="http://localhost:7272")
    runner = CliRunner(mix_stderr=False)

    custom_id = str(uuid.uuid4())

    with tempfile.NamedTemporaryFile(
        mode="w", suffix=".txt", delete=False
    ) as f:
        f.write("Test content")
        temp_path = f.name

    try:
        create_result = await async_invoke(
            runner, create, temp_path, "--ids", custom_id, obj=client
        )
        assert (
            create_result.exit_code == 0
        ), create_result.stdout_bytes.decode()

        output = create_result.stdout_bytes.decode()
        create_response = extract_json_block(output)
        assert create_response["results"]["document_id"] == custom_id
    finally:
        if os.path.exists(temp_path):
            os.unlink(temp_path)

        await async_invoke(runner, delete, custom_id, obj=client)


@pytest.mark.asyncio
async def test_retrieve_nonexistent_document():
    """Test retrieving a document that doesn't exist."""
    client = R2RAsyncClient(base_url="http://localhost:7272")
    runner = CliRunner(mix_stderr=False)

    nonexistent_id = str(uuid.uuid4())
    result = await async_invoke(runner, retrieve, nonexistent_id, obj=client)

    stderr = result.stderr_bytes.decode()
    assert (
        "Document not found" in stderr
        or "Document not found" in result.stdout_bytes.decode()
    )


@pytest.mark.asyncio
async def test_list_chunks_nonexistent_document():
    """Test listing chunks for a document that doesn't exist."""
    client = R2RAsyncClient(base_url="http://localhost:7272")
    runner = CliRunner(mix_stderr=False)

    nonexistent_id = str(uuid.uuid4())
    result = await async_invoke(
        runner, list_chunks, nonexistent_id, obj=client
    )

    stderr = result.stderr_bytes.decode()
    assert (
        "No chunks found for the given document ID." in stderr
        or "No chunks found for the given document ID."
        in result.stdout_bytes.decode()
    )


# FIXME: This should be returning 'Document not found' but returns an empty list instead.
# @pytest.mark.asyncio
# async def test_list_collections_nonexistent_document():
#     """Test listing collections for a document that doesn't exist."""
#     client = R2RAsyncClient(base_url="http://localhost:7272")
#     runner = CliRunner(mix_stderr=False)

#     nonexistent_id = str(uuid.uuid4())
#     result = await async_invoke(
#         runner, list_collections, nonexistent_id, obj=client
#     )

#     stderr = result.stderr_bytes.decode()
#     assert (
#         "Document not found" in stderr
#         or "Document not found" in result.stdout_bytes.decode()
#     )


@pytest.mark.asyncio
async def test_delete_nonexistent_document():
    """Test deleting a document that doesn't exist."""
    client = R2RAsyncClient(base_url="http://localhost:7272")
    runner = CliRunner(mix_stderr=False)

    nonexistent_id = str(uuid.uuid4())
    result = await async_invoke(runner, delete, nonexistent_id, obj=client)

    stderr = result.stderr_bytes.decode()
    assert (
        "No entries found for deletion" in stderr
        or "No entries found for deletion" in result.stdout_bytes.decode()
    )