from app.modules.rag.contracts.enums import RagLayer
from app.modules.rag.indexing.code.pipeline import CodeIndexingPipeline


def test_code_pipeline_builds_source_symbols_edges_and_entrypoints() -> None:
    pipeline = CodeIndexingPipeline()
    content = """
from fastapi import APIRouter

router = APIRouter()

class UserService:
    def get_user(self, user_id):
        return user_id

@router.get("/users/{user_id}")
async def get_user(user_id: str):
    service = UserService()
    return service.get_user(user_id)
"""
    docs = pipeline.index_file(
        repo_id="acme/proj",
        commit_sha="abc123",
        path="app/api/users.py",
        content=content,
    )

    layers = {doc.layer for doc in docs}
    assert RagLayer.CODE_SOURCE_CHUNKS in layers
    assert RagLayer.CODE_SYMBOL_CATALOG in layers
    assert RagLayer.CODE_DEPENDENCY_GRAPH in layers
    assert RagLayer.CODE_ENTRYPOINTS in layers
    assert RagLayer.CODE_SEMANTIC_ROLES in layers

    symbol_doc = next(doc for doc in docs if doc.layer == RagLayer.CODE_SYMBOL_CATALOG and doc.metadata["kind"] == "function")
    assert "get_user" in symbol_doc.metadata["qname"]

    edge_doc = next(doc for doc in docs if doc.layer == RagLayer.CODE_DEPENDENCY_GRAPH)
    assert edge_doc.metadata["edge_type"] in {
        "calls",
        "imports",
        "inherits",
        "instantiates",
        "reads_attr",
        "writes_attr",
        "dataflow_slice",
    }

    entry_doc = next(doc for doc in docs if doc.layer == RagLayer.CODE_ENTRYPOINTS)
    assert entry_doc.metadata["framework"] == "fastapi"
    assert entry_doc.metadata["http_method"] == "GET"
    assert entry_doc.metadata["route_path"] == "/users/{user_id}"
    assert entry_doc.metadata["entrypoint_kind"] == "http_route"
    assert entry_doc.metadata["handler_symbol"] == "get_user"
    assert entry_doc.metadata["summary_text"] == "GET /users/{user_id} declared in get_user"
    assert "GET /users/{user_id}" in entry_doc.text


def test_code_pipeline_indexes_import_alias_as_symbol() -> None:
    pipeline = CodeIndexingPipeline()
    content = "from .v2 import ConfigManagerV2 as ConfigManager\n"

    docs = pipeline.index_file(
        repo_id="acme/proj",
        commit_sha="abc123",
        path="src/config_manager/__init__.py",
        content=content,
    )

    alias_doc = next(doc for doc in docs if doc.layer == RagLayer.CODE_SYMBOL_CATALOG and doc.metadata["qname"] == "ConfigManager")
    assert alias_doc.metadata["kind"] == "const"


def test_code_pipeline_marks_test_documents() -> None:
    pipeline = CodeIndexingPipeline()
    content = """
def test_user_service():
    assert True
"""

    docs = pipeline.index_file(
        repo_id="acme/proj",
        commit_sha="abc123",
        path="tests/test_users.py",
        content=content,
    )

    assert docs
    assert all(doc.metadata["is_test"] is True for doc in docs)


def test_code_pipeline_extracts_data_flow_edges() -> None:
    pipeline = CodeIndexingPipeline()
    content = """
class Context:
    def __init__(self):
        self.data = {}

    def set(self, new_context):
        self.data = new_context

def process():
    ctx = Context()
    value = ctx.data
    return value
"""
    docs = pipeline.index_file(
        repo_id="acme/proj",
        commit_sha="abc123",
        path="src/context.py",
        content=content,
    )
    edges = [doc.metadata for doc in docs if doc.layer == RagLayer.CODE_DEPENDENCY_GRAPH]
    edge_pairs = {(str(item.get("edge_type") or ""), str(item.get("dst_ref") or "")) for item in edges}

    assert ("instantiates", "Context") in edge_pairs
    assert ("writes_attr", "Context.data") in edge_pairs
    assert ("reads_attr", "ctx.data") in edge_pairs


def test_code_pipeline_builds_dataflow_slice_documents() -> None:
    pipeline = CodeIndexingPipeline()
    content = """
class Context:
    def set(self, value):
        self.data = value

def read_data(ctx):
    return ctx.data

def run():
    ctx = Context()
    Context().set({"order_id": 1})
    return read_data(ctx)
"""
    docs = pipeline.index_file(
        repo_id="acme/proj",
        commit_sha="abc123",
        path="src/context_flow.py",
        content=content,
    )

    slices = [
        doc
        for doc in docs
        if doc.layer == RagLayer.CODE_DEPENDENCY_GRAPH and doc.metadata.get("edge_type") == "dataflow_slice"
    ]
    assert slices
    assert any("Context.data" in item.metadata.get("path_symbols", []) for item in slices)
    assert all(item.metadata.get("path_length", 0) <= 6 for item in slices)


def test_code_pipeline_builds_execution_trace_documents() -> None:
    pipeline = CodeIndexingPipeline()
    content = """
from fastapi import APIRouter

router = APIRouter()

def parse():
    return "parsed"

def send_email():
    return parse()

@router.post("/run")
def run_pipeline():
    return send_email()
"""
    docs = pipeline.index_file(
        repo_id="acme/proj",
        commit_sha="abc123",
        path="src/pipeline.py",
        content=content,
    )

    traces = [doc for doc in docs if doc.layer == RagLayer.CODE_ENTRYPOINTS and doc.metadata.get("edge_type") == "execution_trace"]
    assert traces
    assert any(item.metadata.get("path_length", 0) >= 2 for item in traces)
    assert any("run_pipeline" in item.metadata.get("path_symbols", []) for item in traces)


def test_code_pipeline_builds_semantic_role_documents() -> None:
    pipeline = CodeIndexingPipeline()
    content = """
class EmailAdapter:
    def send(self, payload):
        import requests
        return requests.post("http://localhost", json=payload)

class ExcelParser:
    def parse(self, rows):
        import csv
        return list(csv.reader(rows))

class OrderHandler:
    def handle(self, ctx, adapter):
        ctx.data = {"status": "ready"}
        value = ctx.data
        return adapter.send(value)
"""
    docs = pipeline.index_file(
        repo_id="acme/proj",
        commit_sha="abc123",
        path="src/semantic_roles.py",
        content=content,
    )

    roles = {
        doc.metadata.get("symbol_name"): doc.metadata.get("role")
        for doc in docs
        if doc.layer == RagLayer.CODE_SEMANTIC_ROLES
    }

    assert roles.get("EmailAdapter") == "adapter"
    assert roles.get("ExcelParser") == "parser"
    assert roles.get("OrderHandler") == "handler"