package tools_test

import (
	"context"
	"encoding/json"
	"io"
	"net/http"
	"net/http/httptest"
	"testing"

	"gitea.d-ma.be/mathias/gitea-mcp/internal/allowlist"
	"gitea.d-ma.be/mathias/gitea-mcp/internal/gitea"
	"gitea.d-ma.be/mathias/gitea-mcp/internal/tools"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

const issueFixture = `{
	"number": 42,
	"title": "x",
	"body": "y",
	"html_url": "http://example.com/issues/42",
	"state": "open"
}`

func TestIssueCreateAppliesIdentityFooter(t *testing.T) {
	var captured []byte
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		assert.Equal(t, "/api/v1/repos/o/r/issues", r.URL.Path)
		var err error
		captured, err = io.ReadAll(r.Body)
		require.NoError(t, err)
		w.WriteHeader(http.StatusCreated)
		_, _ = w.Write([]byte(issueFixture))
	}))
	defer srv.Close()

	tool := tools.NewIssueCreate(gitea.NewClient(srv.URL, "tok"), allowlist.New([]string{"o"}))
	ctx := callerContext("mathiasbq")
	_, err := tool.Call(ctx, json.RawMessage(`{"owner":"o","name":"r","title":"x","body":"y"}`))
	require.NoError(t, err)

	var payload map[string]any
	require.NoError(t, json.Unmarshal(captured, &payload))
	body, _ := payload["body"].(string)
	assert.Contains(t, body, "_Created via git-mcp on behalf of @mathiasbq_")
}

func TestIssueCreateNoFooterWhenCallerEmpty(t *testing.T) {
	var captured []byte
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		var err error
		captured, err = io.ReadAll(r.Body)
		require.NoError(t, err)
		w.WriteHeader(http.StatusCreated)
		_, _ = w.Write([]byte(issueFixture))
	}))
	defer srv.Close()

	tool := tools.NewIssueCreate(gitea.NewClient(srv.URL, "tok"), allowlist.New([]string{"o"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"o","name":"r","title":"x","body":"y"}`))
	require.NoError(t, err)

	var payload map[string]any
	require.NoError(t, json.Unmarshal(captured, &payload))
	body, _ := payload["body"].(string)
	assert.NotContains(t, body, "_Created via git-mcp on behalf of")
}

func TestIssueCreateAllowlistRejects(t *testing.T) {
	tool := tools.NewIssueCreate(gitea.NewClient("http://unused", ""), allowlist.New([]string{"allowed"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"evil","name":"r","title":"T"}`))
	require.Error(t, err)
}

func TestIssueCreateRequiresTitle(t *testing.T) {
	tool := tools.NewIssueCreate(gitea.NewClient("http://unused", ""), allowlist.New([]string{"o"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"o","name":"r","title":""}`))
	require.Error(t, err)
	assert.ErrorIs(t, err, gitea.ErrValidation)
}