package tools_test

import (
	"context"
	"encoding/json"
	"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 TestPRGetTool(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		assert.Equal(t, "/api/v1/repos/o/r/pulls/42", r.URL.Path)
		assert.Equal(t, http.MethodGet, r.Method)
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{
			"number": 42,
			"title": "Fix bug Y",
			"body": "Fixes Y",
			"html_url": "http://example.com/pulls/42",
			"state": "open",
			"draft": true,
			"head": {"ref": "fix/y"},
			"base": {"ref": "main"}
		}`))
	}))
	defer srv.Close()

	tool := tools.NewPRGet(gitea.NewClient(srv.URL, "tok"), allowlist.New([]string{"o"}))
	out, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"o","name":"r","number":42}`))
	require.NoError(t, err)

	var result map[string]any
	require.NoError(t, json.Unmarshal(out, &result))
	assert.Equal(t, float64(42), result["number"])
	assert.Equal(t, "Fix bug Y", result["title"])
	assert.Equal(t, "http://example.com/pulls/42", result["html_url"])
	assert.Equal(t, "fix/y", result["head"])
	assert.Equal(t, "main", result["base"])
	assert.Equal(t, "open", result["state"])
	assert.Equal(t, true, result["draft"])
}

func TestPRGetAllowlistRejects(t *testing.T) {
	tool := tools.NewPRGet(gitea.NewClient("http://unused", ""), allowlist.New([]string{"allowed"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"evil","name":"r","number":1}`))
	require.Error(t, err)
}

func TestPRGetRequiresValidNumber(t *testing.T) {
	tool := tools.NewPRGet(gitea.NewClient("http://unused", ""), allowlist.New([]string{"o"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"o","name":"r","number":0}`))
	require.Error(t, err)
	assert.ErrorIs(t, err, gitea.ErrValidation)
}