/**
 * Project initialization utilities
 *
 * Handles the setup of the .automaker directory structure when opening
 * new or existing projects.
 */

import { getElectronAPI } from './electron';

export interface ProjectInitResult {
  success: boolean;
  isNewProject: boolean;
  error?: string;
  createdFiles?: string[];
  existingFiles?: string[];
}

/**
 * Required files and directories in the .automaker directory
 * Note: app_spec.txt is NOT created automatically - user must set it up via the spec editor
 */
const REQUIRED_STRUCTURE: {
  directories: string[];
  files: Record<string, string>;
} = {
  directories: ['.automaker', '.automaker/context', '.automaker/features', '.automaker/images'],
  files: {
    '.automaker/categories.json': '[]',
  },
};

/**
 * Initializes the .automaker directory structure for a project
 *
 * @param projectPath - The root path of the project
 * @returns Result indicating what was created or if the project was already initialized
 */
export async function initializeProject(projectPath: string): Promise<ProjectInitResult> {
  const api = getElectronAPI();
  const createdFiles: string[] = [];
  const existingFiles: string[] = [];

  try {
    // Validate that the project directory exists and is a directory
    const projectExists = await api.exists(projectPath);
    if (!projectExists) {
      return {
        success: false,
        isNewProject: false,
        error: `Project directory does not exist: ${projectPath}. Create it first before initializing.`,
      };
    }

    // Verify it's actually a directory (not a file)
    const projectStat = await api.stat(projectPath);
    if (!projectStat.success) {
      return {
        success: false,
        isNewProject: false,
        error: projectStat.error || `Failed to stat project directory: ${projectPath}`,
      };
    }

    if (projectStat.stats && !projectStat.stats.isDirectory) {
      return {
        success: false,
        isNewProject: false,
        error: `Project path is not a directory: ${projectPath}`,
      };
    }

    // Initialize git repository if it doesn't exist
    const gitDirExists = await api.exists(`${projectPath}/.git`);
    if (!gitDirExists) {
      console.log('[project-init] Initializing git repository...');
      try {
        // Initialize git and create an initial empty commit via server route
        const result = await api.worktree?.initGit(projectPath);
        if (result?.success && result.result?.initialized) {
          createdFiles.push('.git');
          console.log('[project-init] Git repository initialized with initial commit');
        } else if (result?.success && !result.result?.initialized) {
          // Git already existed (shouldn't happen since we checked, but handle it)
          existingFiles.push('.git');
          console.log('[project-init] Git repository already exists');
        } else {
          console.warn('[project-init] Failed to initialize git repository:', result?.error);
        }
      } catch (gitError) {
        console.warn('[project-init] Failed to initialize git repository:', gitError);
        // Don't fail the whole initialization if git init fails
      }
    } else {
      existingFiles.push('.git');
    }

    // Create all required directories
    for (const dir of REQUIRED_STRUCTURE.directories) {
      const fullPath = `${projectPath}/${dir}`;
      await api.mkdir(fullPath);
    }

    // Check and create required files
    for (const [relativePath, defaultContent] of Object.entries(REQUIRED_STRUCTURE.files)) {
      const fullPath = `${projectPath}/${relativePath}`;
      const exists = await api.exists(fullPath);

      if (!exists) {
        await api.writeFile(fullPath, defaultContent as string);
        createdFiles.push(relativePath);
      } else {
        existingFiles.push(relativePath);
      }
    }

    // Determine if this is a new project (no files needed to be created since features/ is empty by default)
    const isNewProject = createdFiles.length === 0 && existingFiles.length === 0;

    return {
      success: true,
      isNewProject,
      createdFiles,
      existingFiles,
    };
  } catch (error) {
    console.error('[project-init] Failed to initialize project:', error);
    return {
      success: false,
      isNewProject: false,
      error: error instanceof Error ? error.message : 'Unknown error occurred',
    };
  }
}

/**
 * Checks if a project has the required .automaker structure
 *
 * @param projectPath - The root path of the project
 * @returns true if all required files/directories exist
 */
export async function isProjectInitialized(projectPath: string): Promise<boolean> {
  const api = getElectronAPI();

  try {
    // Check all required directories exist (no files required - features/ folder is source of truth)
    for (const dir of REQUIRED_STRUCTURE.directories) {
      const fullPath = `${projectPath}/${dir}`;
      const exists = await api.exists(fullPath);
      if (!exists) {
        return false;
      }
    }

    return true;
  } catch (error) {
    console.error('[project-init] Error checking project initialization:', error);
    return false;
  }
}

/**
 * Gets a summary of what needs to be initialized for a project
 *
 * @param projectPath - The root path of the project
 * @returns List of missing files/directories
 */
export async function getProjectInitStatus(projectPath: string): Promise<{
  initialized: boolean;
  missingFiles: string[];
  existingFiles: string[];
}> {
  const api = getElectronAPI();
  const missingFiles: string[] = [];
  const existingFiles: string[] = [];

  try {
    // Check directories (no files required - features/ folder is source of truth)
    for (const dir of REQUIRED_STRUCTURE.directories) {
      const fullPath = `${projectPath}/${dir}`;
      const exists = await api.exists(fullPath);
      if (exists) {
        existingFiles.push(dir);
      } else {
        missingFiles.push(dir);
      }
    }

    return {
      initialized: missingFiles.length === 0,
      missingFiles,
      existingFiles,
    };
  } catch (error) {
    console.error('[project-init] Error getting project status:', error);
    return {
      initialized: false,
      missingFiles: REQUIRED_STRUCTURE.directories,
      existingFiles: [],
    };
  }
}

/**
 * Checks if the app_spec.txt file exists for a project
 *
 * @param projectPath - The root path of the project
 * @returns true if app_spec.txt exists
 */
export async function hasAppSpec(projectPath: string): Promise<boolean> {
  const api = getElectronAPI();
  try {
    const fullPath = `${projectPath}/.automaker/app_spec.txt`;
    return await api.exists(fullPath);
  } catch (error) {
    console.error('[project-init] Error checking app_spec.txt:', error);
    return false;
  }
}

/**
 * Checks if the .automaker directory exists for a project
 *
 * @param projectPath - The root path of the project
 * @returns true if .automaker directory exists
 */
export async function hasAutomakerDir(projectPath: string): Promise<boolean> {
  const api = getElectronAPI();
  try {
    const fullPath = `${projectPath}/.automaker`;
    return await api.exists(fullPath);
  } catch (error) {
    console.error('[project-init] Error checking .automaker dir:', error);
    return false;
  }
}