package slurm

import (
	"context"
	"fmt"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestNodesService_GetNodes(t *testing.T) {
	mux := http.NewServeMux()
	mux.HandleFunc("/slurm/v0.0.40/nodes", func(w http.ResponseWriter, r *http.Request) {
		testMethod(t, r, "GET")
		fmt.Fprint(w, `{"nodes": []}`)
	})
	server := httptest.NewServer(mux)
	defer server.Close()

	client, _ := NewClient(server.URL, nil)
	resp, _, err := client.Nodes.GetNodes(context.Background(), nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if resp == nil {
		t.Fatal("expected non-nil response")
	}
}

func TestNodesService_GetNodes_WithOptions(t *testing.T) {
	mux := http.NewServeMux()
	mux.HandleFunc("/slurm/v0.0.40/nodes", func(w http.ResponseWriter, r *http.Request) {
		testMethod(t, r, "GET")
		q := r.URL.Query()
		if q.Get("update_time") != "12345" {
			t.Errorf("expected update_time=12345, got %s", q.Get("update_time"))
		}
		if q.Get("flags") != NodeFlagDetail {
			t.Errorf("expected flags=%s, got %s", NodeFlagDetail, q.Get("flags"))
		}
		fmt.Fprint(w, `{"nodes": []}`)
	})
	server := httptest.NewServer(mux)
	defer server.Close()

	client, _ := NewClient(server.URL, nil)
	opts := &GetNodesOptions{
		UpdateTime: Ptr("12345"),
		Flags:      Ptr(NodeFlagDetail),
	}
	resp, _, err := client.Nodes.GetNodes(context.Background(), opts)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if resp == nil {
		t.Fatal("expected non-nil response")
	}
}

func TestNodesService_GetNode(t *testing.T) {
	mux := http.NewServeMux()
	mux.HandleFunc("/slurm/v0.0.40/node/node1", func(w http.ResponseWriter, r *http.Request) {
		testMethod(t, r, "GET")
		fmt.Fprint(w, `{"nodes": [{"name": "node1"}]}`)
	})
	server := httptest.NewServer(mux)
	defer server.Close()

	client, _ := NewClient(server.URL, nil)
	resp, _, err := client.Nodes.GetNode(context.Background(), "node1", nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if resp == nil {
		t.Fatal("expected non-nil response")
	}
	if resp.Nodes == nil || len(*resp.Nodes) != 1 {
		t.Fatalf("expected 1 node, got %v", resp.Nodes)
	}
	if resp.Nodes == nil || (*resp.Nodes)[0].Name == nil || *(*resp.Nodes)[0].Name != "node1" {
		t.Errorf("expected name=node1, got %v", resp.Nodes)
	}
}

func TestNodesService_PostNode(t *testing.T) {
	mux := http.NewServeMux()
	mux.HandleFunc("/slurm/v0.0.40/node/node1", func(w http.ResponseWriter, r *http.Request) {
		testMethod(t, r, "POST")
		if ct := r.Header.Get("Content-Type"); ct != "application/json" {
			t.Errorf("expected Content-Type application/json, got %s", ct)
		}
		fmt.Fprint(w, `{}`)
	})
	server := httptest.NewServer(mux)
	defer server.Close()

	client, _ := NewClient(server.URL, nil)
	update := &UpdateNodeMsg{
		Comment: Ptr("updated comment"),
	}
	resp, _, err := client.Nodes.PostNode(context.Background(), "node1", update)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if resp == nil {
		t.Fatal("expected non-nil response")
	}
}

func TestNodesService_DeleteNode(t *testing.T) {
	mux := http.NewServeMux()
	mux.HandleFunc("/slurm/v0.0.40/node/node1", func(w http.ResponseWriter, r *http.Request) {
		testMethod(t, r, "DELETE")
		fmt.Fprint(w, `{}`)
	})
	server := httptest.NewServer(mux)
	defer server.Close()

	client, _ := NewClient(server.URL, nil)
	resp, _, err := client.Nodes.DeleteNode(context.Background(), "node1")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if resp == nil {
		t.Fatal("expected non-nil response")
	}
}

func TestNodesService_GetNode_Error(t *testing.T) {
	mux := http.NewServeMux()
	mux.HandleFunc("/slurm/v0.0.40/node/nonexistent", func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusNotFound)
		fmt.Fprint(w, `{"errors": [{"error": "node not found"}]}`)
	})
	server := httptest.NewServer(mux)
	defer server.Close()

	client, _ := NewClient(server.URL, nil)
	_, _, err := client.Nodes.GetNode(context.Background(), "nonexistent", nil)
	if err == nil {
		t.Fatal("expected error for 404 response")
	}
	if !strings.Contains(err.Error(), "404") {
		t.Errorf("expected error to contain 404, got %v", err)
	}
}

func TestNodesService_GetNodes_Error(t *testing.T) {
	mux := http.NewServeMux()
	mux.HandleFunc("/slurm/v0.0.40/nodes", func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusInternalServerError)
		fmt.Fprint(w, `{"errors": [{"error": "internal error"}]}`)
	})
	server := httptest.NewServer(mux)
	defer server.Close()

	client, _ := NewClient(server.URL, nil)
	_, _, err := client.Nodes.GetNodes(context.Background(), nil)
	if err == nil {
		t.Fatal("expected error for 500 response")
	}
}