import { join } from 'path';
import { existsSync, readFileSync, writeFileSync, unlinkSync, mkdirSync } from 'fs';
import { logDebug } from './logger.js';
import { addAutoloadEntry, parseAutoloads, removeAutoloadEntry } from './autoload-ini.js';
const BRIDGE_AUTOLOAD_NAME = 'McpBridge';
const BRIDGE_SCRIPT_FILENAME = 'mcp_bridge.gd';
const MCP_GITIGNORE_ENTRY = '.mcp/';
// Matches the baked-port marker line inserted in src/scripts/mcp_bridge.gd —
// `const PORT := <int>` — so inject() can rewrite the integer per project.
const BAKED_PORT_REGEX = /const PORT := \d+/;
/**
 * Owns the McpBridge autoload artifact: the script copy in the target project,
 * the `[autoload]` entry in project.godot, the `.mcp/.gdignore` marker, and the
 * `.gitignore` augmentation. GodotRunner delegates to this for inject/cleanup
 * during run_project / attach_project / stop_project flows.
 *
 * The project-root bridge script is runtime-owned and refreshed on first
 * injection for a manager session so a rebuilt server cannot talk to stale
 * GDScript from an earlier run. Idempotent within a session via
 * `injectedProjects`: a second `inject()` call for the same path short-circuits
 * without rewriting project.godot.
 */
export class BridgeManager {
    bridgeScriptPath;
    injectedProjects = new Set();
    repairedProjects = new Set();
    /**
     * Last port baked into the on-disk script per project. Used by the
     * race-detection helper in runtime-tools to spot a concurrent re-inject
     * after a bridge-wait timeout.
     */
    lastInjectedPort = new Map();
    constructor(bridgeScriptPath) {
        this.bridgeScriptPath = bridgeScriptPath;
    }
    inject(projectPath, port) {
        // Always rewrite the destination — the per-project bridge script may
        // differ from the template by exactly the baked integer, so a size/mtime
        // shortcut no longer maps to "up-to-date." Bake the resolved port into
        // the const PORT line so the running game listens on the exact port the
        // Node side will connect to.
        const template = readFileSync(this.bridgeScriptPath, 'utf8');
        if (!BAKED_PORT_REGEX.test(template)) {
            throw new Error(`Bridge script template at ${this.bridgeScriptPath} is missing the 'const PORT := <int>' marker`);
        }
        const baked = template.replace(BAKED_PORT_REGEX, `const PORT := ${port}`);
        const destScript = join(projectPath, BRIDGE_SCRIPT_FILENAME);
        writeFileSync(destScript, baked, 'utf8');
        this.lastInjectedPort.set(projectPath, port);
        logDebug(`Wrote bridge autoload at ${destScript} (baked port ${port})`);
        if (this.injectedProjects.has(projectPath)) {
            logDebug('Bridge already injected for this project; refreshed script only.');
            return;
        }
        this.ensureMcpGdignore(projectPath);
        this.ensureGitignored(projectPath);
        const projectFile = join(projectPath, 'project.godot');
        const existing = parseAutoloads(projectFile);
        const alreadyRegistered = existing.some((a) => a.name === BRIDGE_AUTOLOAD_NAME);
        if (alreadyRegistered) {
            logDebug('Bridge autoload already present, skipping injection');
        }
        else {
            addAutoloadEntry(projectFile, BRIDGE_AUTOLOAD_NAME, BRIDGE_SCRIPT_FILENAME, true);
            logDebug('Injected bridge autoload into project.godot');
        }
        this.injectedProjects.add(projectPath);
    }
    cleanup(projectPath) {
        this.removeBridgeArtifacts(projectPath);
        this.injectedProjects.delete(projectPath);
        this.repairedProjects.delete(projectPath);
        this.lastInjectedPort.delete(projectPath);
    }
    /**
     * Read the port currently baked into the project's bridge script. Returns
     * the integer on success, or null if the file is missing, unreadable, or
     * lacks the marker. Used to detect concurrent re-inject after a bridge-
     * wait timeout (another MCP client may have rewritten the port).
     */
    readBakedPort(projectPath) {
        const destScript = join(projectPath, BRIDGE_SCRIPT_FILENAME);
        if (!existsSync(destScript))
            return null;
        try {
            const content = readFileSync(destScript, 'utf8');
            const match = content.match(BAKED_PORT_REGEX);
            if (!match)
                return null;
            const parsed = Number.parseInt(match[0].replace(/^const PORT := /, ''), 10);
            if (!Number.isFinite(parsed) || parsed <= 0 || parsed > 65535)
                return null;
            return parsed;
        }
        catch {
            return null;
        }
    }
    /**
     * If project.godot still has an `McpBridge=` line but the script file is
     * missing, the autoload would crash every subsequent headless op. Detect and
     * clean the orphan before running an operation.
     *
     * Cached per project: once a path has been checked clean, skip the file
     * reads on subsequent ops in the same session.
     */
    repairOrphaned(projectPath) {
        if (this.repairedProjects.has(projectPath))
            return;
        const projectFile = join(projectPath, 'project.godot');
        const bridgeScript = join(projectPath, BRIDGE_SCRIPT_FILENAME);
        if (!existsSync(projectFile))
            return;
        if (existsSync(bridgeScript)) {
            this.repairedProjects.add(projectPath);
            return;
        }
        try {
            const content = readFileSync(projectFile, 'utf8');
            if (content.includes(`${BRIDGE_AUTOLOAD_NAME}=`)) {
                this.removeBridgeArtifacts(projectPath);
                logDebug('Cleaned up orphaned McpBridge autoload entry');
            }
            this.repairedProjects.add(projectPath);
        }
        catch (err) {
            logDebug(`Non-fatal: Failed to check/repair orphaned bridge: ${err}`);
        }
    }
    removeBridgeArtifacts(projectPath) {
        try {
            const projectFile = join(projectPath, 'project.godot');
            if (existsSync(projectFile)) {
                const removed = removeAutoloadEntry(projectFile, BRIDGE_AUTOLOAD_NAME);
                if (removed) {
                    logDebug(`Removed ${BRIDGE_AUTOLOAD_NAME} autoload from project.godot`);
                }
            }
        }
        catch (err) {
            logDebug(`Non-fatal: Failed to clean ${BRIDGE_AUTOLOAD_NAME} from project.godot: ${err}`);
        }
        try {
            const scriptFile = join(projectPath, BRIDGE_SCRIPT_FILENAME);
            if (existsSync(scriptFile)) {
                unlinkSync(scriptFile);
                logDebug(`Removed ${BRIDGE_SCRIPT_FILENAME} from project`);
            }
        }
        catch (err) {
            logDebug(`Non-fatal: Failed to remove ${BRIDGE_SCRIPT_FILENAME}: ${err}`);
        }
        try {
            const uidFile = join(projectPath, `${BRIDGE_SCRIPT_FILENAME}.uid`);
            if (existsSync(uidFile)) {
                unlinkSync(uidFile);
                logDebug(`Removed ${BRIDGE_SCRIPT_FILENAME}.uid from project`);
            }
        }
        catch (err) {
            logDebug(`Non-fatal: Failed to remove ${BRIDGE_SCRIPT_FILENAME}.uid: ${err}`);
        }
    }
    ensureMcpGdignore(projectPath) {
        const mcpDir = join(projectPath, '.mcp');
        mkdirSync(mcpDir, { recursive: true });
        writeFileSync(join(mcpDir, '.gdignore'), '', 'utf8');
        logDebug('Created .mcp/.gdignore');
    }
    ensureGitignored(projectPath) {
        const gitignorePath = join(projectPath, '.gitignore');
        if (existsSync(gitignorePath)) {
            const gitignoreContent = readFileSync(gitignorePath, 'utf8');
            if (!gitignoreContent.includes(MCP_GITIGNORE_ENTRY)) {
                const newline = gitignoreContent.endsWith('\n') ? '' : '\n';
                writeFileSync(gitignorePath, gitignoreContent + newline + MCP_GITIGNORE_ENTRY + '\n', 'utf8');
                logDebug('Added .mcp/ to existing .gitignore');
            }
        }
        else {
            writeFileSync(gitignorePath, MCP_GITIGNORE_ENTRY + '\n', 'utf8');
            logDebug('Created .gitignore with .mcp/ entry');
        }
    }
}
//# sourceMappingURL=bridge-manager.js.map