import process from 'node:process';
import { Nupst } from '../nupst.ts';
import { type ITableColumn, logger } from '../logger.ts';
import { symbols, theme } from '../colors.ts';
import type { IActionConfig } from '../actions/base-action.ts';
import { ProxmoxAction } from '../actions/proxmox-action.ts';
import type { IGroupConfig, IUpsConfig } from '../daemon.ts';
import * as helpers from '../helpers/index.ts';

/**
 * Class for handling action-related CLI commands
 * Provides interface for managing UPS actions
 */
export class ActionHandler {
  private readonly nupst: Nupst;

  /**
   * Create a new action handler
   * @param nupst Reference to the main Nupst instance
   */
  constructor(nupst: Nupst) {
    this.nupst = nupst;
  }

  /**
   * Add a new action to a UPS or group
   */
  public async add(targetId?: string): Promise<void> {
    try {
      if (!targetId) {
        logger.error('Target ID is required');
        logger.log(
          `  ${theme.dim('Usage:')} ${theme.command('nupst action add <ups-id|group-id>')}`,
        );
        logger.log('');
        logger.log(`  ${theme.dim('List UPS devices:')} ${theme.command('nupst ups list')}`);
        logger.log(`  ${theme.dim('List groups:')} ${theme.command('nupst group list')}`);
        logger.log('');
        process.exit(1);
      }

      const config = await this.nupst.getDaemon().loadConfig();

      // Check if it's a UPS
      const ups = config.upsDevices.find((u) => u.id === targetId);
      // Check if it's a group
      const group = config.groups?.find((g) => g.id === targetId);

      if (!ups && !group) {
        logger.error(`UPS or Group with ID '${targetId}' not found`);
        logger.log('');
        logger.log(
          `  ${theme.dim('List available UPS devices:')} ${theme.command('nupst ups list')}`,
        );
        logger.log(`  ${theme.dim('List available groups:')} ${theme.command('nupst group list')}`);
        logger.log('');
        process.exit(1);
      }

      const target = ups || group;
      const targetType = ups ? 'UPS' : 'Group';
      const targetName = ups ? ups.name : group!.name;

      await helpers.withPrompt(async (prompt) => {
        logger.log('');
        logger.info(`Add Action to ${targetType} ${theme.highlight(targetName)}`);
        logger.log('');

        // Action type selection
        logger.log(`  ${theme.dim('Action Type:')}`);
        logger.log(`    ${theme.dim('1)')} Shutdown (system shutdown)`);
        logger.log(`    ${theme.dim('2)')} Webhook (HTTP notification)`);
        logger.log(`    ${theme.dim('3)')} Custom Script (run .sh file from /etc/nupst)`);
        logger.log(`    ${theme.dim('4)')} Proxmox (gracefully shut down VMs/LXCs before host shutdown)`);

        const typeInput = await prompt(`  ${theme.dim('Select action type')} ${theme.dim('[1]:')} `);
        const typeValue = parseInt(typeInput, 10) || 1;

        const newAction: Partial<IActionConfig> = {};

        if (typeValue === 1) {
          // Shutdown action
          newAction.type = 'shutdown';

          const delayStr = await prompt(
            `  ${theme.dim('Shutdown delay')} ${theme.dim('(minutes) [5]:')} `,
          );
          const shutdownDelay = delayStr ? parseInt(delayStr, 10) : 5;
          if (isNaN(shutdownDelay) || shutdownDelay < 0) {
            logger.error('Invalid shutdown delay. Must be >= 0.');
            process.exit(1);
          }
          newAction.shutdownDelay = shutdownDelay;
        } else if (typeValue === 2) {
          // Webhook action
          newAction.type = 'webhook';

          const url = await prompt(`  ${theme.dim('Webhook URL:')} `);
          if (!url.trim()) {
            logger.error('Webhook URL is required.');
            process.exit(1);
          }
          newAction.webhookUrl = url.trim();

          logger.log('');
          logger.log(`  ${theme.dim('HTTP Method:')}`);
          logger.log(`    ${theme.dim('1)')} POST (JSON body)`);
          logger.log(`    ${theme.dim('2)')} GET (query parameters)`);
          const methodInput = await prompt(`  ${theme.dim('Select method')} ${theme.dim('[1]:')} `);
          newAction.webhookMethod = methodInput === '2' ? 'GET' : 'POST';

          const timeoutInput = await prompt(`  ${theme.dim('Timeout in seconds')} ${theme.dim('[10]:')} `);
          const timeout = parseInt(timeoutInput, 10);
          if (timeoutInput.trim() && !isNaN(timeout)) {
            newAction.webhookTimeout = timeout * 1000;
          }
        } else if (typeValue === 3) {
          // Script action
          newAction.type = 'script';

          const scriptPath = await prompt(`  ${theme.dim('Script filename (in /etc/nupst/, must end with .sh):')} `);
          if (!scriptPath.trim() || !scriptPath.trim().endsWith('.sh')) {
            logger.error('Script path must end with .sh.');
            process.exit(1);
          }
          newAction.scriptPath = scriptPath.trim();

          const timeoutInput = await prompt(`  ${theme.dim('Script timeout in seconds')} ${theme.dim('[60]:')} `);
          const timeout = parseInt(timeoutInput, 10);
          if (timeoutInput.trim() && !isNaN(timeout)) {
            newAction.scriptTimeout = timeout * 1000;
          }
        } else if (typeValue === 4) {
          // Proxmox action
          newAction.type = 'proxmox';

          // Auto-detect CLI availability
          const detection = ProxmoxAction.detectCliAvailability();

          if (detection.available) {
            logger.log('');
            logger.success('Proxmox CLI tools detected (qm/pct). No API token needed.');
            logger.dim(`  qm: ${detection.qmPath}`);
            logger.dim(`  pct: ${detection.pctPath}`);
            newAction.proxmoxMode = 'cli';
          } else {
            logger.log('');
            if (!detection.isRoot) {
              logger.warn('Not running as root - CLI mode unavailable, using API mode.');
            } else {
              logger.warn('Proxmox CLI tools (qm/pct) not found - using API mode.');
            }
            logger.log('');
            logger.info('Proxmox API Settings:');
            logger.dim('Create a token with: pveum user token add root@pam nupst --privsep=0');

            const pxHost = await prompt(`  ${theme.dim('Proxmox Host')} ${theme.dim('[localhost]:')} `);
            newAction.proxmoxHost = pxHost.trim() || 'localhost';

            const pxPortInput = await prompt(`  ${theme.dim('Proxmox API Port')} ${theme.dim('[8006]:')} `);
            const pxPort = parseInt(pxPortInput, 10);
            newAction.proxmoxPort = pxPortInput.trim() && !isNaN(pxPort) ? pxPort : 8006;

            const pxNode = await prompt(`  ${theme.dim('Proxmox Node Name (empty = auto-detect):')} `);
            if (pxNode.trim()) {
              newAction.proxmoxNode = pxNode.trim();
            }

            const tokenId = await prompt(`  ${theme.dim('API Token ID (e.g., root@pam!nupst):')} `);
            if (!tokenId.trim()) {
              logger.error('Token ID is required for API mode.');
              process.exit(1);
            }
            newAction.proxmoxTokenId = tokenId.trim();

            const tokenSecret = await prompt(`  ${theme.dim('API Token Secret:')} `);
            if (!tokenSecret.trim()) {
              logger.error('Token Secret is required for API mode.');
              process.exit(1);
            }
            newAction.proxmoxTokenSecret = tokenSecret.trim();

            const insecureInput = await prompt(`  ${theme.dim('Skip TLS verification (self-signed cert)?')} ${theme.dim('(Y/n):')} `);
            newAction.proxmoxInsecure = insecureInput.toLowerCase() !== 'n';
            newAction.proxmoxMode = 'api';
          }

          // Common Proxmox settings (both modes)
          const excludeInput = await prompt(`  ${theme.dim('VM/CT IDs to exclude (comma-separated, or empty):')} `);
          if (excludeInput.trim()) {
            newAction.proxmoxExcludeIds = excludeInput.split(',').map((s) => parseInt(s.trim(), 10)).filter((n) => !isNaN(n));
          }

          const timeoutInput = await prompt(`  ${theme.dim('VM shutdown timeout in seconds')} ${theme.dim('[120]:')} `);
          const stopTimeout = parseInt(timeoutInput, 10);
          if (timeoutInput.trim() && !isNaN(stopTimeout)) {
            newAction.proxmoxStopTimeout = stopTimeout;
          }

          const forceInput = await prompt(`  ${theme.dim('Force-stop VMs that don\'t shut down in time?')} ${theme.dim('(Y/n):')} `);
          newAction.proxmoxForceStop = forceInput.toLowerCase() !== 'n';
        } else {
          logger.error('Invalid action type.');
          process.exit(1);
        }

        // Battery threshold (all action types)
        logger.log('');
        const batteryStr = await prompt(
          `  ${theme.dim('Battery threshold')} ${theme.dim('(%):')} `,
        );
        const battery = parseInt(batteryStr, 10);
        if (isNaN(battery) || battery < 0 || battery > 100) {
          logger.error('Invalid battery threshold. Must be 0-100.');
          process.exit(1);
        }

        // Runtime threshold
        const runtimeStr = await prompt(
          `  ${theme.dim('Runtime threshold')} ${theme.dim('(minutes):')} `,
        );
        const runtime = parseInt(runtimeStr, 10);
        if (isNaN(runtime) || runtime < 0) {
          logger.error('Invalid runtime threshold. Must be >= 0.');
          process.exit(1);
        }

        newAction.thresholds = { battery, runtime };

        // Trigger mode
        logger.log('');
        logger.log(`  ${theme.dim('Trigger mode:')}`);
        logger.log(
          `    ${theme.dim('1)')} onlyPowerChanges - Trigger only when power status changes`,
        );
        logger.log(
          `    ${theme.dim('2)')} onlyThresholds - Trigger only when thresholds are violated`,
        );
        logger.log(
          `    ${
            theme.dim('3)')
          } powerChangesAndThresholds - Trigger on power change AND thresholds`,
        );
        logger.log(`    ${theme.dim('4)')} anyChange - Trigger on any status change`);
        const triggerChoice = await prompt(`  ${theme.dim('Choice')} ${theme.dim('[2]:')} `);
        const triggerModeMap: Record<string, string> = {
          '1': 'onlyPowerChanges',
          '2': 'onlyThresholds',
          '3': 'powerChangesAndThresholds',
          '4': 'anyChange',
          '': 'onlyThresholds', // Default
        };
        const triggerMode = triggerModeMap[triggerChoice] || 'onlyThresholds';
        newAction.triggerMode = triggerMode as IActionConfig['triggerMode'];

        // Add to target (UPS or group)
        if (!target!.actions) {
          target!.actions = [];
        }
        target!.actions.push(newAction as IActionConfig);

        await this.nupst.getDaemon().saveConfig(config);

        logger.log('');
        logger.success(`Action added to ${targetType} ${targetName}`);
        logger.log(`  ${theme.dim('Changes saved and will be applied automatically')}`);
        logger.log('');
      });
    } catch (error) {
      logger.error(
        `Failed to add action: ${error instanceof Error ? error.message : String(error)}`,
      );
      process.exit(1);
    }
  }

  /**
   * Remove an action from a UPS or group
   */
  public async remove(targetId?: string, actionIndexStr?: string): Promise<void> {
    try {
      if (!targetId || !actionIndexStr) {
        logger.error('Target ID and action index are required');
        logger.log(
          `  ${theme.dim('Usage:')} ${
            theme.command('nupst action remove <ups-id|group-id> <action-index>')
          }`,
        );
        logger.log('');
        logger.log(`  ${theme.dim('List actions:')} ${theme.command('nupst action list')}`);
        logger.log('');
        process.exit(1);
      }

      const actionIndex = parseInt(actionIndexStr, 10);
      if (isNaN(actionIndex) || actionIndex < 0) {
        logger.error('Invalid action index. Must be >= 0.');
        process.exit(1);
      }

      const config = await this.nupst.getDaemon().loadConfig();

      // Check if it's a UPS
      const ups = config.upsDevices.find((u) => u.id === targetId);
      // Check if it's a group
      const group = config.groups?.find((g) => g.id === targetId);

      if (!ups && !group) {
        logger.error(`UPS or Group with ID '${targetId}' not found`);
        logger.log('');
        logger.log(
          `  ${theme.dim('List available UPS devices:')} ${theme.command('nupst ups list')}`,
        );
        logger.log(`  ${theme.dim('List available groups:')} ${theme.command('nupst group list')}`);
        logger.log('');
        process.exit(1);
      }

      const target = ups || group;
      const targetType = ups ? 'UPS' : 'Group';
      const targetName = ups ? ups.name : group!.name;

      if (!target!.actions || target!.actions.length === 0) {
        logger.error(`No actions configured for ${targetType} '${targetName}'`);
        logger.log('');
        process.exit(1);
      }

      if (actionIndex >= target!.actions.length) {
        logger.error(
          `Invalid action index. ${targetType} '${targetName}' has ${
            target!.actions.length
          } action(s) (index 0-${target!.actions.length - 1})`,
        );
        logger.log('');
        logger.log(
          `  ${theme.dim('List actions:')} ${theme.command(`nupst action list ${targetId}`)}`,
        );
        logger.log('');
        process.exit(1);
      }

      const removedAction = target!.actions[actionIndex];
      target!.actions.splice(actionIndex, 1);

      await this.nupst.getDaemon().saveConfig(config);

      logger.log('');
      logger.success(`Action removed from ${targetType} ${targetName}`);
      logger.log(`  ${theme.dim('Type:')} ${removedAction.type}`);
      if (removedAction.thresholds) {
        logger.log(
          `  ${
            theme.dim('Thresholds:')
          } Battery: ${removedAction.thresholds.battery}%, Runtime: ${removedAction.thresholds.runtime}min`,
        );
      }
      logger.log(`  ${theme.dim('Changes saved and will be applied automatically')}`);
      logger.log('');
    } catch (error) {
      logger.error(
        `Failed to remove action: ${error instanceof Error ? error.message : String(error)}`,
      );
      process.exit(1);
    }
  }

  /**
   * List all actions for a specific UPS/group or all devices
   */
  public async list(targetId?: string): Promise<void> {
    try {
      const config = await this.nupst.getDaemon().loadConfig();

      if (targetId) {
        // List actions for specific UPS or group
        const ups = config.upsDevices.find((u) => u.id === targetId);
        const group = config.groups?.find((g) => g.id === targetId);

        if (!ups && !group) {
          logger.error(`UPS or Group with ID '${targetId}' not found`);
          logger.log('');
          logger.log(
            `  ${theme.dim('List available UPS devices:')} ${theme.command('nupst ups list')}`,
          );
          logger.log(
            `  ${theme.dim('List available groups:')} ${theme.command('nupst group list')}`,
          );
          logger.log('');
          process.exit(1);
        }

        if (ups) {
          this.displayTargetActions(ups, 'UPS');
        } else {
          this.displayTargetActions(group!, 'Group');
        }
      } else {
        // List actions for all UPS devices and groups
        logger.log('');
        logger.info('Actions for All UPS Devices and Groups');
        logger.log('');

        let hasAnyActions = false;

        // Display UPS actions
        for (const ups of config.upsDevices) {
          if (ups.actions && ups.actions.length > 0) {
            hasAnyActions = true;
            this.displayTargetActions(ups, 'UPS');
          }
        }

        // Display Group actions
        for (const group of config.groups || []) {
          if (group.actions && group.actions.length > 0) {
            hasAnyActions = true;
            this.displayTargetActions(group, 'Group');
          }
        }

        if (!hasAnyActions) {
          logger.log(`  ${theme.dim('No actions configured')}`);
          logger.log('');
          logger.log(
            `  ${theme.dim('Add an action:')} ${
              theme.command('nupst action add <ups-id|group-id>')
            }`,
          );
          logger.log('');
        }
      }
    } catch (error) {
      logger.error(
        `Failed to list actions: ${error instanceof Error ? error.message : String(error)}`,
      );
      process.exit(1);
    }
  }

  /**
   * Display actions for a single UPS or Group
   */
  private displayTargetActions(
    target: IUpsConfig | IGroupConfig,
    targetType: 'UPS' | 'Group',
  ): void {
    logger.log(
      `${symbols.info} ${targetType} ${theme.highlight(target.name)} ${
        theme.dim(`(${target.id})`)
      }`,
    );
    logger.log('');

    if (!target.actions || target.actions.length === 0) {
      logger.log(`  ${theme.dim('No actions configured')}`);
      logger.log('');
      return;
    }

    const columns: ITableColumn[] = [
      { header: 'Index', key: 'index', align: 'right' },
      { header: 'Type', key: 'type', align: 'left' },
      { header: 'Battery', key: 'battery', align: 'right' },
      { header: 'Runtime', key: 'runtime', align: 'right' },
      { header: 'Trigger Mode', key: 'triggerMode', align: 'left' },
      { header: 'Details', key: 'details', align: 'left' },
    ];

    const rows = target.actions.map((action, index) => {
      let details = `${action.shutdownDelay || 5}min delay`;
      if (action.type === 'proxmox') {
        const mode = action.proxmoxMode || 'auto';
        if (mode === 'cli' || (mode === 'auto' && !action.proxmoxTokenId)) {
          details = 'CLI mode';
        } else {
          const host = action.proxmoxHost || 'localhost';
          const port = action.proxmoxPort || 8006;
          details = `API ${host}:${port}`;
        }
        if (action.proxmoxExcludeIds?.length) {
          details += `, excl: ${action.proxmoxExcludeIds.join(',')}`;
        }
      } else if (action.type === 'webhook') {
        details = action.webhookUrl || theme.dim('N/A');
      } else if (action.type === 'script') {
        details = action.scriptPath || theme.dim('N/A');
      }

      return {
        index: theme.dim(index.toString()),
        type: theme.highlight(action.type),
        battery: action.thresholds ? `${action.thresholds.battery}%` : theme.dim('N/A'),
        runtime: action.thresholds ? `${action.thresholds.runtime}min` : theme.dim('N/A'),
        triggerMode: theme.dim(action.triggerMode || 'onlyThresholds'),
        details,
      };
    });

    logger.logTable(columns, rows);
    logger.log('');
  }
}