import json
import pytest
import httpx
import respx
from gitea_mcp import (
    list_pull_requests, get_pull_request, create_pull_request, update_pull_request,
    merge_pull_request, get_pr_diff, list_pr_files, list_pr_reviews, create_pr_review,
)

BASE = "https://gitea.test/api/v1"


@respx.mock
def test_list_pull_requests():
    route = respx.get(f"{BASE}/repos/owner/repo/pulls").mock(
        return_value=httpx.Response(200, json=[])
    )
    list_pull_requests("owner", "repo")
    params = dict(route.calls[0].request.url.params)
    assert params["state"] == "open"
    assert params["limit"] == "20"


@respx.mock
def test_list_pull_requests_closed():
    route = respx.get(f"{BASE}/repos/owner/repo/pulls").mock(
        return_value=httpx.Response(200, json=[])
    )
    list_pull_requests("owner", "repo", state="closed", limit=5)
    params = dict(route.calls[0].request.url.params)
    assert params["state"] == "closed"
    assert params["limit"] == "5"


@respx.mock
def test_get_pull_request():
    route = respx.get(f"{BASE}/repos/owner/repo/pulls/7").mock(
        return_value=httpx.Response(200, json={"number": 7, "title": "Add feature"})
    )
    result = get_pull_request("owner", "repo", 7)
    assert route.called
    assert result["number"] == 7


@respx.mock
def test_create_pull_request():
    route = respx.post(f"{BASE}/repos/owner/repo/pulls").mock(
        return_value=httpx.Response(201, json={"number": 10})
    )
    result = create_pull_request("owner", "repo", "Add feature", "feature/x", "main")
    assert route.called
    body = json.loads(route.calls[0].request.content)
    assert body["title"] == "Add feature"
    assert body["head"] == "feature/x"
    assert body["base"] == "main"
    assert "body" not in body


@respx.mock
def test_create_pull_request_with_body_and_labels():
    route = respx.post(f"{BASE}/repos/owner/repo/pulls").mock(
        return_value=httpx.Response(201, json={"number": 11})
    )
    create_pull_request(
        "owner", "repo", "Fix bug", "fix/crash", "main",
        body="Fixes crash on startup", labels=[3],
    )
    body = json.loads(route.calls[0].request.content)
    assert body["body"] == "Fixes crash on startup"
    assert body["labels"] == [3]


@respx.mock
def test_update_pull_request():
    route = respx.patch(f"{BASE}/repos/owner/repo/pulls/5").mock(
        return_value=httpx.Response(200, json={"number": 5})
    )
    update_pull_request("owner", "repo", 5, title="New title")
    body = json.loads(route.calls[0].request.content)
    assert body["title"] == "New title"
    assert "body" not in body


@respx.mock
def test_merge_pull_request_defaults():
    route = respx.post(f"{BASE}/repos/owner/repo/pulls/3/merge").mock(
        return_value=httpx.Response(200, json={"success": True})
    )
    merge_pull_request("owner", "repo", 3)
    assert route.called
    body = json.loads(route.calls[0].request.content)
    assert body["Do"] == "merge"
    assert body["delete_branch_after_merge"] is False


@respx.mock
def test_merge_pull_request_squash_with_delete():
    route = respx.post(f"{BASE}/repos/owner/repo/pulls/4/merge").mock(
        return_value=httpx.Response(200, json={"success": True})
    )
    merge_pull_request("owner", "repo", 4, merge_style="squash", delete_branch_after_merge=True)
    body = json.loads(route.calls[0].request.content)
    assert body["Do"] == "squash"
    assert body["delete_branch_after_merge"] is True


@respx.mock
def test_get_pr_diff():
    diff_text = "diff --git a/file.py b/file.py\n+added line\n"
    route = respx.get(f"{BASE}/repos/owner/repo/pulls/2.diff").mock(
        return_value=httpx.Response(200, text=diff_text)
    )
    result = get_pr_diff("owner", "repo", 2)
    assert route.called
    assert result["diff"] == diff_text


@respx.mock
def test_get_pr_diff_error():
    respx.get(f"{BASE}/repos/owner/repo/pulls/99.diff").mock(
        return_value=httpx.Response(404, text="not found")
    )
    with pytest.raises(RuntimeError, match="404"):
        get_pr_diff("owner", "repo", 99)


@respx.mock
def test_list_pr_files():
    route = respx.get(f"{BASE}/repos/owner/repo/pulls/5/files").mock(
        return_value=httpx.Response(200, json=[{"filename": "server/gitea_mcp.py", "status": "modified"}])
    )
    result = list_pr_files("owner", "repo", 5)
    assert route.called
    assert result[0]["filename"] == "server/gitea_mcp.py"
    params = dict(route.calls[0].request.url.params)
    assert params["limit"] == "50"
    assert params["page"] == "1"


@respx.mock
def test_list_pr_files_with_whitespace():
    route = respx.get(f"{BASE}/repos/owner/repo/pulls/6/files").mock(
        return_value=httpx.Response(200, json=[])
    )
    list_pr_files("owner", "repo", 6, whitespace="ignore-all")
    params = dict(route.calls[0].request.url.params)
    assert params["whitespace"] == "ignore-all"


@respx.mock
def test_list_pr_reviews():
    route = respx.get(f"{BASE}/repos/owner/repo/pulls/8/reviews").mock(
        return_value=httpx.Response(200, json=[{"id": 1, "state": "APPROVED"}])
    )
    result = list_pr_reviews("owner", "repo", 8)
    assert route.called
    assert result[0]["state"] == "APPROVED"


@respx.mock
def test_create_pr_review_approved():
    route = respx.post(f"{BASE}/repos/owner/repo/pulls/9/reviews").mock(
        return_value=httpx.Response(200, json={"id": 5, "state": "APPROVED"})
    )
    result = create_pr_review("owner", "repo", 9, "APPROVED", body="Looks good!")
    assert route.called
    body = json.loads(route.calls[0].request.content)
    assert body["event"] == "APPROVED"
    assert body["body"] == "Looks good!"


@respx.mock
def test_create_pr_review_request_changes():
    route = respx.post(f"{BASE}/repos/owner/repo/pulls/10/reviews").mock(
        return_value=httpx.Response(200, json={"id": 6, "state": "REQUEST_CHANGES"})
    )
    create_pr_review("owner", "repo", 10, "REQUEST_CHANGES")
    body = json.loads(route.calls[0].request.content)
    assert body["event"] == "REQUEST_CHANGES"
    assert "body" not in body