'use strict';

const fs = require('fs');
const path = require('path');
const { tryEditorRequests } = require('./cocos-project');
const { openAsset } = require('../assets');

const TEMPLATE_PATH = path.join(__dirname, '..', '..', 'resources', 'template.scene');

function buildSceneContent(sceneName, templatePath) {
  const tplPath = templatePath || TEMPLATE_PATH;
  let content;
  try {
    content = fs.readFileSync(tplPath, 'utf8');
  } catch (err) {
    throw new Error(`Failed to read scene template at ${tplPath}: ${err.message}`);
  }
  const json = JSON.parse(content);
  if (json[0] && json[0]._name !== undefined) {
    json[0]._name = sceneName;
  }
  if (json[1] && json[1]._name !== undefined) {
    json[1]._name = sceneName;
  }
  return JSON.stringify(json);
}

function createSceneManagementTools({ createSchema, sceneBridge }) {
  return [
    {
      name: 'create_scene',
      profile: 'full',
      description: '[core] Create a new scene asset in the Cocos project and optionally open it.',
      inputSchema: createSchema(
        {
          sceneName: { type: 'string', description: 'Name of the new scene (without extension).' },
          savePath: { type: 'string', description: 'Asset-db URL, e.g. db://assets/scenes/NewScene.scene.' },
          open: { type: 'boolean', description: 'Whether to open the scene after creation. Default true.' },
          overwrite: { type: 'boolean', description: 'Overwrite if the asset already exists. Default false.' },
        },
        ['sceneName', 'savePath']
      ),
      handler: async (args) => {
        const sceneName = String(args.sceneName || '').trim();
        const savePath = String(args.savePath || '').trim();
        if (!sceneName) {
          throw new Error('sceneName is required.');
        }
        if (!savePath) {
          throw new Error('savePath is required.');
        }
        if (!savePath.endsWith('.scene')) {
          throw new Error('savePath must end with .scene');
        }

        const content = buildSceneContent(sceneName);
        const createArgs = [savePath, content];
        if (args.overwrite === true) {
          createArgs.push({ overwrite: true });
        }

        const result = await tryEditorRequests([
          { channel: 'asset-db', method: 'create-asset', args: createArgs },
        ]);

        const url = (result.result && (result.result.url || result.result.source)) || savePath;
        const uuid = result.result && result.result.uuid;

        if (args.open !== false) {
          try {
            await openAsset(url);
          } catch (_) {
            // Opening is best-effort; creation succeeded.
          }
        }

        return {
          created: true,
          sceneName,
          url,
          uuid,
          opened: args.open !== false,
        };
      },
    },
    {
      name: 'query_scene_state',
      profile: 'core',
      description: '[specialist] Query scene state: dirty (unsaved changes), ready, or soft-reload.',
      inputSchema: createSchema(
        {
          action: {
            type: 'string',
            enum: ['is_dirty', 'is_ready', 'soft_reload'],
            description: 'State query or action.',
          },
        },
        ['action']
      ),
      handler: async (args) => {
        const action = String(args.action || '').trim();
        const IPC_MAP = {
          is_dirty: [
            { channel: 'scene', method: 'query-dirty' },
          ],
          is_ready: [
            { channel: 'scene', method: 'query-is-ready' },
          ],
          soft_reload: [
            { channel: 'scene', method: 'soft-reload' },
          ],
        };
        const candidates = IPC_MAP[action];
        if (!candidates) {
          throw new Error(`Unknown action: ${action}. Must be one of: is_dirty, is_ready, soft_reload.`);
        }
        const result = await tryEditorRequests(candidates);
        return {
          action,
          result: result.result,
        };
      },
    },
    {
      name: 'copy_paste_node',
      profile: 'full',
      description: '[core] Copy, cut, or paste scene nodes via the Cocos editor clipboard.',
      inputSchema: createSchema(
        {
          action: {
            type: 'string',
            enum: ['copy', 'cut', 'paste', 'duplicate'],
            description: 'Clipboard or duplication action.',
          },
          uuids: {
            type: 'array',
            items: { type: 'string' },
            description: 'Node UUIDs to copy, cut, or duplicate.',
          },
          target: { type: 'string', description: 'Target parent node UUID for paste.' },
          keepWorldTransform: {
            type: 'boolean',
            description: 'Keep world transform on paste. Default false.',
          },
        },
        ['action']
      ),
      handler: async (args) => {
        const action = String(args.action || '').trim();

        if (action === 'copy' || action === 'cut') {
          const uuids = Array.isArray(args.uuids) ? args.uuids.filter(Boolean) : [];
          if (uuids.length === 0) {
            throw new Error(`uuids is required for action: ${action}.`);
          }
          const method = action === 'copy' ? 'copy-node' : 'cut-node';
          const result = await tryEditorRequests([
            { channel: 'scene', method, args: [uuids] },
          ]);
          return { action, uuids, result: result.result };
        }

        if (action === 'duplicate') {
          const uuids = Array.isArray(args.uuids) ? args.uuids.filter(Boolean) : [];
          if (uuids.length === 0) {
            throw new Error('uuids is required for action: duplicate.');
          }
          const result = await tryEditorRequests([
            { channel: 'scene', method: 'duplicate-node', args: [uuids] },
          ]);
          return { action, uuids, result: result.result };
        }

        if (action === 'paste') {
          const target = String(args.target || '').trim();
          if (!target) {
            throw new Error('target is required for action: paste.');
          }
          const keepWorldTransform = args.keepWorldTransform === true;
          const pasteOpts = { target, keepWorldTransform };
          const uuids = Array.isArray(args.uuids) ? args.uuids.filter(Boolean) : [];
          if (uuids.length > 0) {
            pasteOpts.uuids = uuids;
          }
          const result = await tryEditorRequests([
            {
              channel: 'scene',
              method: 'paste-node',
              args: [pasteOpts],
            },
          ]);
          return { action, target, keepWorldTransform, result: result.result };
        }

        throw new Error(`Unknown action: ${action}. Must be one of: copy, cut, paste, duplicate.`);
      },
    },
    {
      name: 'rename_node',
      profile: 'full',
      description: '[core] Rename a scene node.',
      inputSchema: createSchema(
        {
          path: { type: 'string', description: 'Node hierarchy path.' },
          uuid: { type: 'string', description: 'Node UUID.' },
          name: { type: 'string', description: 'Fallback exact node name.' },
          newName: { type: 'string', description: 'New name for the node.' },
        },
        ['newName']
      ),
      handler: async (args) => sceneBridge.call('renameNode', args),
    },
    {
      name: 'reparent_node',
      profile: 'full',
      description: '[core] Move a node to a new parent in the scene hierarchy.',
      inputSchema: createSchema(
        {
          path: { type: 'string', description: 'Node hierarchy path to move.' },
          uuid: { type: 'string', description: 'Node UUID to move.' },
          name: { type: 'string', description: 'Fallback exact node name.' },
          targetPath: { type: 'string', description: 'New parent node path.' },
          targetUuid: { type: 'string', description: 'New parent node UUID.' },
          targetName: { type: 'string', description: 'Fallback exact new parent name.' },
          siblingIndex: {
            type: 'number',
            description: 'Optional insert position among siblings. Default: append.',
          },
          keepWorldTransform: {
            type: 'boolean',
            description: 'Keep world transform after reparenting. Default false.',
          },
        },
        []
      ),
      handler: async (args) => sceneBridge.call('reparentNode', args),
    },
  ];
}

module.exports = {
  buildSceneContent,
  createSceneManagementTools,
};