package provision

import (
	"fmt"
	"strings"

	"zlh-agent/internal/state"
	"zlh-agent/internal/provision/minecraft"
	"zlh-agent/internal/provision/steam"
)

/*
   ProvisionAll — unified entrypoint for MC + Steam.
   IMPORTANT:
   - This function ONLY performs installation.
   - Validation/verification happens in ensureProvisioned().
*/
func ProvisionAll(cfg state.Config) error {

	game := strings.ToLower(cfg.Game)
	variant := strings.ToLower(cfg.Variant)

	/* ---------------------------------------------------------
	   MINECRAFT
	--------------------------------------------------------- */
	if game == "minecraft" {

		// 1. Install Java (runtime)
		if err := InstallJava(cfg); err != nil {
			return fmt.Errorf("java install failed: %w", err)
		}

		// 2. Game variant install
		switch variant {

		case "vanilla", "paper", "purpur", "fabric", "quilt":
			if err := minecraft.InstallMinecraftVanilla(cfg); err != nil {
				return fmt.Errorf("minecraft vanilla install failed: %w", err)
			}

		case "forge":
			if err := minecraft.InstallMinecraftForge(cfg); err != nil {
				return fmt.Errorf("forge install failed: %w", err)
			}

		case "neoforge":
			if err := minecraft.InstallMinecraftNeoForge(cfg); err != nil {
				return fmt.Errorf("neoforge install failed: %w", err)
			}

		default:
			return fmt.Errorf("unsupported minecraft variant: %s", variant)
		}

		// 3. Config files generated AFTER variant installer
		if err := WriteEula(cfg); err != nil {
			return err
		}
		if err := WriteServerProperties(cfg); err != nil {
			return err
		}
		if err := WriteStartScript(cfg); err != nil {
			return err
		}

		// DO NOT VERIFY HERE.
		// Verification happens in ensureProvisioned(), AFTER install.
		return nil
	}

	/* ---------------------------------------------------------
	   STEAM GAMES
	--------------------------------------------------------- */
	if IsSteamGame(game) {

		// 1. SteamCMD install
		if err := steam.EnsureSteamCMD(); err != nil {
			return fmt.Errorf("steamcmd install failed: %w", err)
		}

		// 2. Install game-specific content
		switch game {

		case "valheim":
			if err := steam.InstallValheim(cfg); err != nil {
				return err
			}

		case "rust":
			if err := steam.InstallRust(cfg); err != nil {
				return err
			}

		case "terraria":
			if err := steam.InstallTerraria(cfg); err != nil {
				return err
			}

		case "projectzomboid":
			if err := steam.InstallProjectZomboid(cfg); err != nil {
				return err
			}

		default:
			return fmt.Errorf("unsupported steam game: %s", game)
		}

		// 3. Start script
		if err := WriteStartScript(cfg); err != nil {
			return err
		}

		// DO NOT VERIFY HERE (Steam verification TBD later)
		return nil
	}

	/* ---------------------------------------------------------
	   UNKNOWN GAME TYPE
	--------------------------------------------------------- */
	return fmt.Errorf("unsupported game type: %s", game)
}