package main

import (
	"encoding/json"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestBootTestPayloadIsWhatANewServerGets(t *testing.T) {
	dir := t.TempDir()
	game := filepath.Join(dir, "games", "demo")
	if err := os.MkdirAll(game, 0o755); err != nil {
		t.Fatal(err)
	}
	os.WriteFile(filepath.Join(game, "game.yaml"), []byte(`id: demo
name: Demo
defaultDockerImage: debian:12
installMethod: NONE
defaultConfig:
  RCON_PORT: 25575
  ENABLE_RCON: true
  RCON_PASSWORD: ""
  ServerPassword: ""
  AdminPassword: kept-by-owner
  MOTD: "{SERVER_NAME} on {PUBLIC_PORT_25565}"
configSchema:
  properties:
    RCON_PORT: {type: integer}
    ENABLE_RCON: {type: boolean}
    RCON_PASSWORD: {type: string, x-generate: {type: password}}
    ServerPassword: {type: string}
    AdminPassword: {type: string}
    MOTD: {type: string}
`), 0o644)

	out := filepath.Join(dir, "payload.json")
	if err := runBootTestPayload([]string{"-games", filepath.Join(dir, "games"), "-out", out, "demo"}); err != nil {
		t.Fatal(err)
	}
	raw, _ := os.ReadFile(out)
	var payload struct{ GameConfig map[string]any }
	if err := json.Unmarshal(raw, &payload); err != nil {
		t.Fatal(err)
	}
	c := payload.GameConfig

	if c["RCON_PORT"] != float64(25575) {
		t.Errorf("RCON_PORT changed to %v", c["RCON_PORT"])
	}
	if c["ENABLE_RCON"] != true {
		t.Errorf("ENABLE_RCON changed to %v", c["ENABLE_RCON"])
	}
	// Exactly what a new server gets: the x-generate password is made, a blank join password stays blank
	if s, _ := c["RCON_PASSWORD"].(string); !strings.HasPrefix(s, "boot-") {
		t.Errorf("x-generate RCON_PASSWORD not filled: %v", c["RCON_PASSWORD"])
	}
	if c["ServerPassword"] != "" {
		t.Errorf("ServerPassword must stay empty, as for a new server: %v", c["ServerPassword"])
	}
	if c["AdminPassword"] != "kept-by-owner" {
		t.Errorf("AdminPassword overwritten: %v", c["AdminPassword"])
	}
	if c["MOTD"] != "gbr-boot-test on 25565" {
		t.Errorf("placeholders not resolved: %v", c["MOTD"])
	}

	// Only for the builder's diagnosis: blank passwords filled too
	if err := runBootTestPayload([]string{"-fill-blank-passwords", "-games", filepath.Join(dir, "games"), "-out", out, "demo"}); err != nil {
		t.Fatal(err)
	}
	raw, _ = os.ReadFile(out)
	payload.GameConfig = nil
	if err := json.Unmarshal(raw, &payload); err != nil {
		t.Fatal(err)
	}
	if s, _ := payload.GameConfig["ServerPassword"].(string); !strings.HasPrefix(s, "boot-") {
		t.Errorf("-fill-blank-passwords: ServerPassword not filled: %v", payload.GameConfig["ServerPassword"])
	}
}