package handlers

import (
	"bytes"
	"encoding/json"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/go-chi/chi/v5"
)

func TestProjectManagementHandler_NilService(t *testing.T) {
	h := NewProjectManagementHandler(nil, slog.Default())
	r := chi.NewRouter()
	h.Mount(r)

	tests := []struct {
		name   string
		method string
		path   string
		body   string
	}{
		{"create", "POST", "/project", `{"name":"test"}`},
		{"list", "GET", "/project", ""},
		{"status", "GET", "/project/test", ""},
		{"delete", "DELETE", "/project/test", ""},
		{"list templates", "GET", "/templates", ""},
		{"list component templates", "GET", "/templates/components", ""},
		{"get template", "GET", "/templates/default", ""},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			var req *http.Request
			if tt.body != "" {
				req = httptest.NewRequest(tt.method, tt.path, bytes.NewReader([]byte(tt.body)))
			} else {
				req = httptest.NewRequest(tt.method, tt.path, nil)
			}
			rec := httptest.NewRecorder()
			r.ServeHTTP(rec, req)

			if rec.Code != http.StatusInternalServerError {
				t.Errorf("%s: status = %d, want %d", tt.name, rec.Code, http.StatusInternalServerError)
			}
		})
	}
}

func TestProjectManagementHandler_CreateValidation(t *testing.T) {
	// With nil service, the handler returns 500 before reaching validation.
	// This tests that the nil check takes precedence.
	h := NewProjectManagementHandler(nil, slog.Default())
	r := chi.NewRouter()
	h.Mount(r)

	t.Run("nil service returns 500 even with missing name", func(t *testing.T) {
		body, _ := json.Marshal(CreateRequest{Name: ""})
		req := httptest.NewRequest("POST", "/project", bytes.NewReader(body))
		rec := httptest.NewRecorder()
		r.ServeHTTP(rec, req)

		if rec.Code != http.StatusInternalServerError {
			t.Errorf("status = %d, want %d", rec.Code, http.StatusInternalServerError)
		}
	})

	t.Run("nil service returns 500 even with invalid json", func(t *testing.T) {
		req := httptest.NewRequest("POST", "/project", bytes.NewReader([]byte("not json")))
		rec := httptest.NewRecorder()
		r.ServeHTTP(rec, req)

		if rec.Code != http.StatusInternalServerError {
			t.Errorf("status = %d, want %d", rec.Code, http.StatusInternalServerError)
		}
	})
}

func TestNewProjectManagementHandler_NilLogger(t *testing.T) {
	h := NewProjectManagementHandler(nil, nil)
	if h.logger == nil {
		t.Error("logger should default to slog.Default() when nil")
	}
}