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 TestFileReadToolWithExplicitRef(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		assert.Equal(t, "/api/v1/repos/mathias/infra/contents/README.md", r.URL.Path)
		assert.Equal(t, "main", r.URL.Query().Get("ref"))
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"path":"README.md","sha":"deadbeef","size":13,"content":"SGVsbG8sIHdvcmxkIQ==","encoding":"base64"}`))
	}))
	defer srv.Close()

	tool := tools.NewFileRead(gitea.NewClient(srv.URL, "tok"), allowlist.New([]string{"mathias"}))
	out, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"mathias","name":"infra","path":"README.md","ref":"main"}`))
	require.NoError(t, err)

	var result map[string]any
	require.NoError(t, json.Unmarshal(out, &result))
	assert.Equal(t, "README.md", result["path"])
	assert.Equal(t, "main", result["ref"])
	assert.Equal(t, "Hello, world!", result["content"])
}

func TestFileReadToolDefaultBranchResolution(t *testing.T) {
	mux := http.NewServeMux()
	mux.HandleFunc("/api/v1/repos/mathias/infra", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"name":"infra","full_name":"mathias/infra","default_branch":"main"}`))
	})
	mux.HandleFunc("/api/v1/repos/mathias/infra/contents/README.md", func(w http.ResponseWriter, r *http.Request) {
		assert.Equal(t, "main", r.URL.Query().Get("ref"))
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"path":"README.md","sha":"deadbeef","size":13,"content":"SGVsbG8sIHdvcmxkIQ==","encoding":"base64"}`))
	})
	srv := httptest.NewServer(mux)
	defer srv.Close()

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

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

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