// src/panels/services/ProjectService.ts
import * as vscode from 'vscode';
import * as path from 'path';
import * as fs from 'fs';
import { 
    Project, 
    Aircraft, 
    Container, 
    Config, 
    ModuleFolder 
} from '../types/CommonTypes';
import { StorageService } from './StorageService';

/**
 * 项目数据管理服务
 */
export class ProjectService {
    private projects: Project[] = [];
    private aircrafts: Aircraft[] = [];
    private containers: Container[] = [];
    private configs: Config[] = [];
    private moduleFolders: ModuleFolder[] = [];
    private projectPaths: Map<string, string> = new Map();

    /**
     * 生成唯一ID
     */
    generateUniqueId(prefix: string, _existingItems: any[] = []): string {
        const randomPart = `${Date.now().toString(36)}${Math.random().toString(36).substring(2, 8)}`;
        return `${prefix}${randomPart}`;
    }

    // =============== 项目相关方法 ===============

    getProjects(): Project[] {
        return this.projects;
    }

    getProjectPaths(): Map<string, string> {
        return this.projectPaths;
    }

    getProjectPath(projectId: string): string | undefined {
        return this.projectPaths.get(projectId);
    }

    setProjectPath(projectId: string, pathStr: string): void {
        this.projectPaths.set(projectId, pathStr);
    }

    async createProject(name: string): Promise<string> {
        const newId = this.generateUniqueId('p', this.projects);
        const newProject: Project = {
            id: newId,
            name: name
        };
        this.projects.push(newProject);
        return newId;
    }

    updateProjectName(projectId: string, newName: string): boolean {
        const project = this.projects.find(p => p.id === projectId);
        if (project) {
            project.name = newName;
            return true;
        }
        return false;
    }

    deleteProject(projectId: string): boolean {
        const project = this.projects.find(p => p.id === projectId);
        if (!project) return false;

        // 先把要删的 id 都算出来，再统一过滤
        const relatedAircrafts = this.aircrafts.filter(a => a.projectId === projectId);
        const aircraftIds = relatedAircrafts.map(a => a.id);

        const relatedContainers = this.containers.filter(c => aircraftIds.includes(c.aircraftId));
        const containerIds = relatedContainers.map(c => c.id);

        // 真正删除数据
        this.projects = this.projects.filter(p => p.id !== projectId);
        this.aircrafts = this.aircrafts.filter(a => a.projectId !== projectId);
        this.containers = this.containers.filter(c => !aircraftIds.includes(c.aircraftId));
        this.configs = this.configs.filter(cfg => !containerIds.includes(cfg.containerId));
        this.moduleFolders = this.moduleFolders.filter(folder => !containerIds.includes(folder.containerId));

        this.projectPaths.delete(projectId);

        return true;
    }

    // =============== 飞行器相关方法 ===============

    getAircraftsByProject(projectId: string): Aircraft[] {
        return this.aircrafts.filter(a => a.projectId === projectId);
    }
    
    getAircraft(aircraftId: string): Aircraft | undefined {
        return this.aircrafts.find(a => a.id === aircraftId);
    }

    async createAircraft(name: string, projectId: string): Promise<string> {
        const newId = this.generateUniqueId('a', this.aircrafts);
        const newAircraft: Aircraft = {
            id: newId,
            name: name,
            projectId: projectId
        };
        this.aircrafts.push(newAircraft);

        // 创建飞行器目录
        await this.createAircraftDirectory(newAircraft);
        return newId;
    }

    updateAircraftName(aircraftId: string, newName: string): boolean {
        const aircraft = this.aircrafts.find(a => a.id === aircraftId);
        if (aircraft) {
            aircraft.name = newName;
            return true;
        }
        return false;
    }

    deleteAircraft(aircraftId: string): boolean {
        const aircraft = this.aircrafts.find(a => a.id === aircraftId);
        if (!aircraft) return false;

        // ⚠️ 先算出要删的 containerIds
        const relatedContainers = this.containers.filter(c => c.aircraftId === aircraftId);
        const containerIds = relatedContainers.map(c => c.id);

        // 删除飞机自身和容器
        this.aircrafts = this.aircrafts.filter(a => a.id !== aircraftId);
        this.containers = this.containers.filter(c => c.aircraftId !== aircraftId);

        // 再删关联的 config 和 moduleFolder
        this.configs = this.configs.filter(cfg => !containerIds.includes(cfg.containerId));
        this.moduleFolders = this.moduleFolders.filter(folder => !containerIds.includes(folder.containerId));

        return true;
    }

    /**
     * 从已存在的磁盘目录导入飞行器
     * 不会创建/删除任何文件，只在内存中补充 Aircraft / Container / ModuleFolder 数据
     */
    async importAircraftFromExistingFolder(projectId: string, aircraftName: string): Promise<string> {
        // 已存在同名飞行器直接返回
        const existed = this.getAircraftsByProject(projectId).find(a => a.name === aircraftName);
        if (existed) {
            return existed.id;
        }

        const newId = this.generateUniqueId('a', this.aircrafts);
        const aircraft: Aircraft = {
            id: newId,
            name: aircraftName,
            projectId
        };
        this.aircrafts.push(aircraft);

        const projectPath = this.projectPaths.get(projectId);
        if (!projectPath) {
            return newId;
        }

        const aircraftDir = path.join(projectPath, aircraftName);
        if (!fs.existsSync(aircraftDir)) {
            // 目录不存在就不再解析子目录
            return newId;
        }

        // 每个子目录视为一个容器（排除 .git）
        const entries = await fs.promises.readdir(aircraftDir, { withFileTypes: true });
        for (const entry of entries) {
            if (!entry.isDirectory()) continue;
            if (entry.name === '.git') continue;

            await this.importContainerFromExistingFolder(newId, entry.name);
        }

        return newId;
    }

    // =============== 容器相关方法 ===============

    /**
     * ⚠️ 这里不再做 .git 过滤：
     * - 我们只会通过 createContainer / importContainerFromExistingFolder 创建容器
     * - importContainerFromExistingFolder 内部已经排除了 .git
     * 所以不会出现名字叫 ".git" 的容器
     */
    getContainersByAircraft(aircraftId: string): Container[] {
        return this.containers.filter(c => c.aircraftId === aircraftId);
    }
    
    getContainer(containerId: string): Container | undefined {
        return this.containers.find(c => c.id === containerId);
    }

    async createContainer(name: string, aircraftId: string): Promise<string> {
        const newId = this.generateUniqueId('c', this.containers);
        const newContainer: Container = {
            id: newId,
            name: name,
            aircraftId: aircraftId
        };
        this.containers.push(newContainer);

        await this.createContainerDirectory(newContainer);
        // UI 手动创建的容器，仍然保留“默认两个配置”的行为
        await this.createDefaultConfigs(newContainer);
        
        return newId;
    }

    updateContainerName(containerId: string, newName: string): boolean {
        const container = this.containers.find(c => c.id === containerId);
        if (container) {
            container.name = newName;
            return true;
        }
        return false;
    }

    deleteContainer(containerId: string): boolean {
        const container = this.containers.find(c => c.id === containerId);
        if (!container) return false;

        this.containers = this.containers.filter(c => c.id !== containerId);
        this.configs = this.configs.filter(cfg => cfg.containerId !== containerId);
        this.moduleFolders = this.moduleFolders.filter(folder => folder.containerId !== containerId);

        return true;
    }

    /**
     * 从已存在的磁盘目录导入容器
     *
     * ✅ 你的最新需求：
     * - 不创建“默认两个配置”
     * - 自动扫描容器目录下的『子文件夹』
     * - 每个子文件夹创建一个 ModuleFolder（type: 'local'）
     * - 排除 `.git` 子文件夹
     */
    async importContainerFromExistingFolder(aircraftId: string, containerName: string): Promise<string> {
        if (containerName === '.git') {
            throw new Error('不能将 .git 导入为容器');
        }

        const existed = this.getContainersByAircraft(aircraftId).find(c => c.name === containerName);
        if (existed) {
            return existed.id;
        }

        const newId = this.generateUniqueId('c', this.containers);
        const container: Container = {
            id: newId,
            name: containerName,
            aircraftId
        };
        this.containers.push(container);

        // 🚩 关键逻辑：扫描容器目录下的子文件夹 -> 创建 ModuleFolder
        await this.scanContainerModuleFolders(container);

        // 不再创建默认两个配置（不调用 createDefaultConfigs）
        // 也不创建目录（目录是 Git 克隆出来的，本来就存在）

        return newId;
    }

    /**
     * 扫描容器目录中的子文件夹（不含 .git），将其作为本地模块文件夹记录
     */
    private async scanContainerModuleFolders(container: Container): Promise<void> {
        try {
            const aircraft = this.aircrafts.find(a => a.id === container.aircraftId);
            if (!aircraft) return;

            const projectPath = this.projectPaths.get(aircraft.projectId);
            if (!projectPath) return;

            const containerDir = path.join(projectPath, aircraft.name, container.name);
            if (!fs.existsSync(containerDir)) {
                return;
            }

            const entries = await fs.promises.readdir(containerDir, { withFileTypes: true });

            for (const entry of entries) {
                if (!entry.isDirectory()) continue;
                if (entry.name === '.git') continue;

                const folderId = this.generateUniqueId('local-', this.moduleFolders);
                const relativePath = `/${aircraft.projectId}/${aircraft.name}/${container.name}/${entry.name}`;

                const moduleFolder: ModuleFolder = {
                    id: folderId,
                    name: entry.name,
                    type: 'local',
                    localPath: relativePath,
                    containerId: container.id
                };

                this.moduleFolders.push(moduleFolder);
            }

        } catch (error) {
            console.error('扫描容器目录生成模块文件夹失败:', error);
        }
    }

    // =============== 配置相关方法 ===============

    getConfigsByContainer(containerId: string): Config[] {
        return this.configs.filter(cfg => cfg.containerId === containerId);
    }

    getConfig(configId: string): Config | undefined {
        return this.configs.find(c => c.id === configId);
    }

    async createConfig(name: string, containerId: string): Promise<string> {
        const newId = this.generateUniqueId('cfg', this.configs);
        const newConfig: Config = {
            id: newId,
            name: name,
            fileName: name.toLowerCase().replace(/\s+/g, '_'),
            containerId: containerId
        };
        this.configs.push(newConfig);

        await this.ensureContainerDirectoryExists(containerId);
        return newId;
    }

    updateConfigName(configId: string, newName: string): boolean {
        const config = this.configs.find(c => c.id === configId);
        if (config) {
            config.name = newName;
            return true;
        }
        return false;
    }

    deleteConfig(configId: string): boolean {
        const config = this.configs.find(c => c.id === configId);
        if (!config) return false;

        this.configs = this.configs.filter(c => c.id !== configId);
        return true;
    }

    // =============== 模块文件夹相关方法 ===============

    getModuleFoldersByContainer(containerId: string): ModuleFolder[] {
        return this.moduleFolders.filter(folder => folder.containerId === containerId);
    }

    getModuleFolder(folderId: string): ModuleFolder | undefined {
        return this.moduleFolders.find(f => f.id === folderId);
    }

    addModuleFolder(folder: ModuleFolder): void {
        this.moduleFolders.push(folder);
    }

    updateModuleFolder(folderId: string, updates: Partial<ModuleFolder>): boolean {
        const folderIndex = this.moduleFolders.findIndex(f => f.id === folderId);
        if (folderIndex === -1) return false;

        this.moduleFolders[folderIndex] = {
            ...this.moduleFolders[folderIndex],
            ...updates
        };
        return true;
    }

    deleteModuleFolder(folderId: string): boolean {
        const folder = this.moduleFolders.find(f => f.id === folderId);
        if (!folder) return false;

        this.moduleFolders = this.moduleFolders.filter(f => f.id !== folderId);
        return true;
    }

    renameModuleFolder(folderId: string, newName: string): boolean {
        const folder = this.moduleFolders.find(f => f.id === folderId);
        if (!folder) return false;

        const oldName = folder.localPath.split('/').pop() || '';
        folder.localPath = folder.localPath.replace(/\/[^/]+$/, '/' + newName);
        return true;
    }

    // =============== 文件系统操作 (新增/修改) ===============
    
    /**
     * 获取项目目录重命名所需的旧路径和新路径（新增）
     */
    getProjectOldAndNewPaths(projectId: string, newName: string): { oldPath: string, newPath: string } | null {
        const project = this.projects.find(p => p.id === projectId);
        const oldPath = this.projectPaths.get(projectId);

        if (!project || !oldPath) return null;

        const parentDir = path.dirname(oldPath);
        // 新路径使用新的项目名称作为文件夹名
        const newPath = path.join(parentDir, newName);

        return { oldPath, newPath };
    }

    /**
     * 获取飞行器目录的完整路径
     */
    getAircraftDirectoryPath(aircraftId: string): string | null {
        const aircraft = this.getAircraft(aircraftId);
        if (!aircraft) return null;

        const projectPath = this.projectPaths.get(aircraft.projectId);
        if (!projectPath) return null;

        return path.join(projectPath, aircraft.name);
    }
    
    /**
     * 获取飞行器目录重命名所需的旧路径和新路径（新增）
     * 注意：oldPath使用内存中当前的名称，newPath使用将要更新的新名称
     */
    getAircraftOldAndNewPaths(aircraftId: string, newName: string): { oldPath: string, newPath: string } | null {
        const aircraft = this.aircrafts.find(a => a.id === aircraftId);
        if (!aircraft) return null;

        const projectPath = this.projectPaths.get(aircraft.projectId);
        if (!projectPath) return null;

        const oldPath = path.join(projectPath, aircraft.name);
        const newPath = path.join(projectPath, newName);

        return { oldPath, newPath };
    }


    /**
     * 获取容器目录的完整路径
     */
    getContainerDirectoryPath(containerId: string): string | null {
        const container = this.getContainer(containerId);
        if (!container) return null;

        const aircraft = this.getAircraft(container.aircraftId);
        if (!aircraft) return null;

        const projectPath = this.projectPaths.get(aircraft.projectId);
        if (!projectPath) return null;

        return path.join(projectPath, aircraft.name, container.name);
    }
    
    /**
     * 获取容器目录重命名所需的旧路径和新路径（新增）
     * 注意：oldPath使用内存中当前的名称，newPath使用将要更新的新名称
     */
    getContainerOldAndNewPaths(containerId: string, newName: string): { oldPath: string, newPath: string } | null {
        const container = this.containers.find(c => c.id === containerId);
        if (!container) return null;

        const aircraft = this.aircrafts.find(a => a.id === container.aircraftId);
        if (!aircraft) return null;

        const projectPath = this.projectPaths.get(aircraft.projectId);
        if (!projectPath) return null;
        
        const aircraftDir = path.join(projectPath, aircraft.name);
        const oldPath = path.join(aircraftDir, container.name);
        const newPath = path.join(aircraftDir, newName);

        return { oldPath, newPath };
    }


    /**
     * 递归删除目录
     */
    async deleteDirectoryFromDisk(directoryPath: string): Promise<boolean> {
        if (!directoryPath) return false;

        try {
            if (fs.existsSync(directoryPath)) {
                await fs.promises.rm(directoryPath, { recursive: true, force: true });
                console.log(`✅ 已删除目录: ${directoryPath}`);
                return true;
            }
            return false;
        } catch (error) {
            console.error(`删除目录失败: ${error}`);
            throw error; // Re-throw to be handled by ConfigPanel
        }
    }
    
    /**
     * 重命名磁盘上的目录（新增）
     */
    async renameDirectoryOnDisk(oldPath: string, newPath: string): Promise<boolean> {
        if (!oldPath || !newPath) return false;

        try {
            if (fs.existsSync(oldPath)) {
                await fs.promises.rename(oldPath, newPath);
                console.log(`✅ 已重命名目录: ${oldPath} -> ${newPath}`);
                return true;
            }
            console.warn(`目录不存在，跳过重命名: ${oldPath}`);
            return false;
        } catch (error) {
            console.error(`重命名目录失败: ${error}`);
            throw error; // Re-throw to be handled by ConfigPanel
        }
    }


    private async createAircraftDirectory(aircraft: Aircraft): Promise<void> {
        try {
            const projectPath = this.projectPaths.get(aircraft.projectId);
            if (!projectPath) {
                console.warn('未找到项目路径，跳过创建飞行器目录');
                return;
            }

            const aircraftDir = vscode.Uri.joinPath(vscode.Uri.file(projectPath), aircraft.name);
            await vscode.workspace.fs.createDirectory(aircraftDir);
            console.log(`✅ 创建飞行器目录: ${aircraftDir.fsPath}`);
            
        } catch (error) {
            console.error(`创建飞行器目录失败: ${error}`);
        }
    }

    private async createContainerDirectory(container: Container): Promise<void> {
        try {
            const aircraft = this.aircrafts.find(a => a.id === container.aircraftId);
            if (!aircraft) {
                console.warn('未找到对应的飞行器，跳过创建容器目录');
                return;
            }

            const projectPath = this.projectPaths.get(aircraft.projectId);
            if (!projectPath) {
                console.warn('未找到项目路径，跳过创建容器目录');
                return;
            }

            const aircraftDir = vscode.Uri.joinPath(vscode.Uri.file(projectPath), aircraft.name);
            const containerDir = vscode.Uri.joinPath(aircraftDir, container.name);
            
            await vscode.workspace.fs.createDirectory(aircraftDir);
            await vscode.workspace.fs.createDirectory(containerDir);
            console.log(`✅ 创建容器目录: ${containerDir.fsPath}`);
            
        } catch (error) {
            console.error(`创建容器目录失败: ${error}`);
        }
    }

    private async ensureContainerDirectoryExists(containerId: string): Promise<void> {
        try {
            const container = this.containers.find(c => c.id === containerId);
            if (!container) return;

            const aircraft = this.aircrafts.find(a => a.id === container.aircraftId);
            if (!aircraft) return;

            const projectPath = this.projectPaths.get(aircraft.projectId);
            if (!projectPath) return;

            const aircraftDir = vscode.Uri.joinPath(vscode.Uri.file(projectPath), aircraft.name);
            const containerDir = vscode.Uri.joinPath(aircraftDir, container.name);
            
            await vscode.workspace.fs.createDirectory(aircraftDir);
            await vscode.workspace.fs.createDirectory(containerDir);
            
        } catch (error) {
            console.error(`确保容器目录存在失败: ${error}`);
        }
    }

    /**
     * 仅用于「新建容器」时的默认两个配置
     * （导入容器时不会调用）
     */
    private async createDefaultConfigs(container: Container): Promise<void> {
        this.configs.push({
            id: this.generateUniqueId('cfg', this.configs),
            name: '配置1',
            fileName: 'dockerfile',
            containerId: container.id
        });

        this.configs.push({
            id: this.generateUniqueId('cfg', this.configs),
            name: '配置2',
            fileName: 'docker-compose.yml',
            containerId: container.id
        });
    }

    // =============== 数据持久化 ===============

    async saveCurrentProjectData(projectId: string): Promise<boolean> {
        try {
            const projectPath = this.projectPaths.get(projectId);
            if (!projectPath) {
                console.warn('未找到项目存储路径，数据将不会保存');
                return false;
            }

            const data = this.getProjectData(projectId);
            return await StorageService.saveProjectData(projectPath, data);
        } catch (error) {
            console.error('保存项目数据失败:', error);
            return false;
        }
    }

    async loadProjectData(projectPath: string): Promise<string | null> {
        try {
            const data = await StorageService.loadProjectData(projectPath);
            if (!data) {
                return null;
            }

            const projectId = data.projects[0]?.id;
            if (!projectId) {
                return null;
            }

            // 先根据旧的 projectId 算出要清理的 aircraft / container / config / moduleFolder
            const existingAircrafts = this.aircrafts.filter(a => a.projectId === projectId);
            const aircraftIds = existingAircrafts.map(a => a.id);

            const existingContainers = this.containers.filter(c => aircraftIds.includes(c.aircraftId));
            const containerIds = existingContainers.map(c => c.id);

            // 清理旧数据（同一个 projectId 的）
            this.projects = this.projects.filter(p => p.id !== projectId);
            this.aircrafts = this.aircrafts.filter(a => a.projectId !== projectId);
            this.containers = this.containers.filter(c => !aircraftIds.includes(c.aircraftId));
            this.configs = this.configs.filter(cfg => !containerIds.includes(cfg.containerId));
            this.moduleFolders = this.moduleFolders.filter(folder => !containerIds.includes(folder.containerId));

            // ⭐ 载入新数据时顺便过滤掉名字为 ".git" 的容器（避免历史数据带进来）
            const cleanedContainers = data.containers.filter(c => c.name !== '.git');

            this.projects.push(...data.projects);
            this.aircrafts.push(...data.aircrafts);
            this.containers.push(...cleanedContainers);
            this.configs.push(...data.configs);
            this.moduleFolders.push(...data.moduleFolders);

            this.projectPaths.set(projectId, projectPath);
            return projectId;
        } catch (error) {
            console.error('加载项目数据失败:', error);
            return null;
        }
    }

    private getProjectData(projectId: string): any {
        return {
            projects: [this.projects.find(p => p.id === projectId)!],
            aircrafts: this.aircrafts.filter(a => a.projectId === projectId),
            containers: this.containers.filter(c => {
                const aircraft = this.aircrafts.find(a => a.id === c.aircraftId);
                return aircraft && aircraft.projectId === projectId;
            }),
            configs: this.configs.filter(cfg => {
                const container = this.containers.find(c => c.id === cfg.containerId);
                if (!container) return false;
                const aircraft = this.aircrafts.find(a => a.id === container.aircraftId);
                return aircraft && aircraft.projectId === projectId;
            }),
            moduleFolders: this.moduleFolders.filter(folder => {
                const container = this.containers.find(c => c.id === folder.containerId);
                if (!container) return false;
                const aircraft = this.aircrafts.find(a => a.id === container.aircraftId);
                return aircraft && aircraft.projectId === projectId;
            })
        };
    }

    // =============== 工具方法 ===============

    getModuleFolderFullPath(folder: ModuleFolder): string | null {
        const container = this.containers.find(c => c.id === folder.containerId);
        if (!container) return null;

        const aircraft = this.aircrafts.find(a => a.id === container.aircraftId);
        if (!aircraft) return null;

        const projectPath = this.projectPaths.get(aircraft.projectId);
        if (!projectPath) return null;

        const pathParts = folder.localPath.split('/').filter(part => part);
        if (pathParts.length < 4) return null;

        const folderName = pathParts[pathParts.length - 1];
        return path.join(projectPath, aircraft.name, container.name, folderName);
    }

    getConfigFilePath(configId: string): string | null {
        const config = this.configs.find(c => c.id === configId);
        if (!config) return null;

        const container = this.containers.find(c => c.id === config.containerId);
        if (!container) return null;

        const aircraft = this.aircrafts.find(a => a.id === container.aircraftId);
        if (!aircraft) return null;

        const projectPath = this.projectPaths.get(aircraft.projectId);
        if (!projectPath) return null;

        return path.join(projectPath, aircraft.name, container.name, config.fileName);
    }

    async deleteConfigFileFromDisk(configId: string): Promise<boolean> {
        const filePath = this.getConfigFilePath(configId);
        if (!filePath) return false;

        try {
            if (fs.existsSync(filePath)) {
                await fs.promises.unlink(filePath);
                console.log(`✅ 已删除配置文件: ${filePath}`);
                return true;
            }
            return false;
        } catch (error) {
            console.error(`删除配置文件失败: ${error}`);
            return false;
        }
    }
}