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 TestDirListReturnsEntries(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		assert.Equal(t, "/api/v1/repos/owner/repo/contents/src", r.URL.Path)
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`[
			{"name":"main.go","path":"src/main.go","type":"file","sha":"abc","size":512},
			{"name":"util","path":"src/util","type":"dir","sha":"def","size":0}
		]`))
	}))
	defer srv.Close()

	tool := tools.NewDirList(gitea.NewClient(srv.URL, "tok"), allowlist.New([]string{"owner"}))
	out, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"owner","name":"repo","path":"src"}`))
	require.NoError(t, err)

	var result []map[string]any
	require.NoError(t, json.Unmarshal(out, &result))
	require.Len(t, result, 2)
	assert.Equal(t, "main.go", result[0]["name"])
	assert.Equal(t, "file", result[0]["type"])
	assert.Equal(t, "util", result[1]["name"])
	assert.Equal(t, "dir", result[1]["type"])
}

func TestDirListRootPath(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		assert.Equal(t, "/api/v1/repos/owner/repo/contents/", r.URL.Path)
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`[]`))
	}))
	defer srv.Close()

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

	var result []map[string]any
	require.NoError(t, json.Unmarshal(out, &result))
	assert.Empty(t, result)
}

func TestDirListOnFileReturnsError(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"path":"README.md","sha":"abc","size":10,"content":"","encoding":"base64"}`))
	}))
	defer srv.Close()

	tool := tools.NewDirList(gitea.NewClient(srv.URL, "tok"), allowlist.New([]string{"owner"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"owner","name":"repo","path":"README.md"}`))
	require.Error(t, err)
	assert.ErrorIs(t, err, gitea.ErrValidation)
}

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