package tools_test

import (
	"context"
	"encoding/json"
	"errors"
	"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"
)

func TestCodeSearchSingleRepo(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		assert.Equal(t, "/api/v1/repos/mathias/infra/search", r.URL.Path)
		assert.Equal(t, "ListRepos", r.URL.Query().Get("q"))
		assert.Equal(t, "code", r.URL.Query().Get("type"))
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{
			"data":[{
				"path":"internal/gitea/repos.go",
				"snippet":"func (c *Client) ListRepos",
				"html_url":"http://gitea.example.com/mathias/infra/src/branch/main/internal/gitea/repos.go",
				"score":3.0
			}],
			"ok":true
		}`))
	}))
	defer srv.Close()

	tool := tools.NewCodeSearch(gitea.NewClient(srv.URL, "tok"), allowlist.New([]string{"mathias"}))
	out, err := tool.Call(context.Background(), json.RawMessage(`{"q":"ListRepos","owner":"mathias","repo":"infra"}`))
	require.NoError(t, err)

	var result struct {
		Results []struct {
			Repo    string  `json:"repo"`
			Path    string  `json:"path"`
			Snippet string  `json:"snippet"`
			Score   float64 `json:"score"`
		} `json:"results"`
	}
	require.NoError(t, json.Unmarshal(out, &result))
	require.Len(t, result.Results, 1)
	assert.Equal(t, "mathias/infra", result.Results[0].Repo)
	assert.Equal(t, "internal/gitea/repos.go", result.Results[0].Path)
	assert.Equal(t, "func (c *Client) ListRepos", result.Results[0].Snippet)
}

func TestCodeSearchAllowlistRejects(t *testing.T) {
	tool := tools.NewCodeSearch(gitea.NewClient("http://unused", ""), allowlist.New([]string{"mathias"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"q":"foo","owner":"evil","repo":"infra"}`))
	require.Error(t, err)
}

func TestCodeSearchRequiresQ(t *testing.T) {
	tool := tools.NewCodeSearch(gitea.NewClient("http://unused", ""), allowlist.New([]string{"mathias"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"mathias","repo":"infra"}`))
	require.Error(t, err)
	assert.True(t, errors.Is(err, gitea.ErrValidation))
}

func TestCodeSearchFanOutNotYetImplemented(t *testing.T) {
	tool := tools.NewCodeSearch(gitea.NewClient("http://unused", ""), allowlist.New([]string{"mathias"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"q":"foo","owner":"mathias"}`))
	require.Error(t, err)
	assert.True(t, errors.Is(err, gitea.ErrValidation))
}