import { Component, inject, OnInit } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { MatCardModule } from '@angular/material/card';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';
import { MatSelectModule } from '@angular/material/select';
import { MatButtonModule } from '@angular/material/button';
import { MatIconModule } from '@angular/material/icon';
import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
import { MatSnackBar, MatSnackBarModule } from '@angular/material/snack-bar';
import { MatExpansionModule } from '@angular/material/expansion';
import { ApiService, Environment } from '../../services/api.service';

@Component({
  selector: 'app-environment',
  standalone: true,
  imports: [
    CommonModule,
    FormsModule,
    MatCardModule,
    MatFormFieldModule,
    MatInputModule,
    MatSelectModule,
    MatButtonModule,
    MatIconModule,
    MatProgressSpinnerModule,
    MatSnackBarModule,
    MatExpansionModule
  ],
  template: `
    <div class="environment-container">
      <mat-card>
        <mat-card-header>
          <mat-card-title>
            <mat-icon>settings</mat-icon>
            Environment Configuration
          </mat-card-title>
        </mat-card-header>
        
        <mat-card-content>
          <form (ngSubmit)="save()" #envForm="ngForm">
            <mat-form-field appearance="outline" class="full-width">
              <mat-label>Work Mode</mat-label>
              <mat-select
                name="workMode"
                [(ngModel)]="environment.work_mode"
                (selectionChange)="onWorkModeChange()"
                required
                [disabled]="loading"
              >
                <mat-option value="hfcloud">HF Cloud</mat-option>
                <mat-option value="cloud">Cloud</mat-option>
                <mat-option value="on-premise">On-Premise</mat-option>
              </mat-select>
              <mat-icon matPrefix>cloud</mat-icon>
            </mat-form-field>

            <mat-form-field appearance="outline" class="full-width">
              <mat-label>Cloud Token</mat-label>
              <input
                matInput
                type="password"
                name="cloudToken"
                [(ngModel)]="environment.cloud_token"
                [disabled]="loading || environment.work_mode === 'on-premise'"
                placeholder="Enter cloud token"
              >
              <mat-icon matPrefix>vpn_key</mat-icon>
              <mat-hint>Required for HF Cloud and Cloud modes</mat-hint>
            </mat-form-field>

            <mat-form-field appearance="outline" class="full-width">
              <mat-label>Spark Endpoint</mat-label>
              <input
                matInput
                type="url"
                name="sparkEndpoint"
                [(ngModel)]="environment.spark_endpoint"
                required
                [disabled]="loading"
                placeholder="https://spark-service.example.com"
              >
              <mat-icon matPrefix>link</mat-icon>
              <button
                mat-icon-button
                matSuffix
                type="button"
                (click)="testConnection()"
                [disabled]="loading || !environment.spark_endpoint"
                matTooltip="Test Connection"
              >
                <mat-icon>wifi_tethering</mat-icon>
              </button>
            </mat-form-field>

            <mat-expansion-panel class="prompt-panel">
              <mat-expansion-panel-header>
                <mat-panel-title>
                  <mat-icon>psychology</mat-icon>
                  Internal System Prompt
                </mat-panel-title>
                <mat-panel-description>
                  Advanced configuration for Spark LLM
                </mat-panel-description>
              </mat-expansion-panel-header>
              
              <mat-form-field appearance="outline" class="full-width">
                <mat-label>Internal Prompt</mat-label>
                <textarea
                  matInput
                  name="internalPrompt"
                  [(ngModel)]="environment.internal_prompt"
                  [disabled]="loading"
                  rows="10"
                  placeholder="Enter internal system prompt for Spark..."
                ></textarea>
                <mat-hint>This prompt will be prepended to all project prompts</mat-hint>
              </mat-form-field>
            </mat-expansion-panel>

            <div class="form-actions">
              <button
                mat-raised-button
                color="primary"
                type="submit"
                [disabled]="loading || !envForm.valid || saving"
              >
                @if (saving) {
                  <mat-spinner diameter="20"></mat-spinner>
                  Saving...
                } @else {
                  <mat-icon>save</mat-icon>
                  Save
                }
              </button>
              
              <button
                mat-raised-button
                type="button"
                (click)="reloadFromSpark()"
                [disabled]="loading"
              >
                <mat-icon>refresh</mat-icon>
                Reload from Spark
              </button>
            </div>
          </form>
        </mat-card-content>
      </mat-card>
    </div>
  `,
  styles: [`
    .environment-container {
      max-width: 800px;
      margin: 0 auto;
    }

    mat-card-header {
      margin-bottom: 24px;

      mat-card-title {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 24px;

        mat-icon {
          font-size: 28px;
          width: 28px;
          height: 28px;
        }
      }
    }

    .full-width {
      width: 100%;
      margin-bottom: 20px;
    }

    .prompt-panel {
      margin-bottom: 20px;
      
      mat-expansion-panel-header {
        mat-panel-title {
          display: flex;
          align-items: center;
          gap: 8px;
          
          mat-icon {
            color: #666;
          }
        }
      }
    }

    .form-actions {
      display: flex;
      gap: 16px;
      margin-top: 24px;
      padding-top: 24px;
      border-top: 1px solid #e0e0e0;

      button {
        display: flex;
        align-items: center;
        gap: 8px;

        mat-spinner {
          margin-right: 8px;
        }
      }
    }

    ::ng-deep {
      .mat-mdc-form-field-icon-prefix {
        padding-right: 12px;
      }

      .mat-mdc-progress-spinner {
        --mdc-circular-progress-active-indicator-color: white;
      }
      
      .mat-expansion-panel-body {
        padding: 16px 0 !important;
      }
    }
  `]
})
export class EnvironmentComponent implements OnInit {
  private apiService = inject(ApiService);
  private snackBar = inject(MatSnackBar);

  environment: Environment = {
    work_mode: 'hfcloud',
    cloud_token: '',
    spark_endpoint: '',
    internal_prompt: ''
  };

  loading = true;
  saving = false;

  ngOnInit() {
    this.loadEnvironment();
  }

  loadEnvironment() {
    this.loading = true;
    this.apiService.getEnvironment().subscribe({
      next: (env) => {
        this.environment = env;
        this.loading = false;
      },
      error: (err) => {
        this.snackBar.open('Failed to load environment configuration', 'Close', {
          duration: 5000,
          panelClass: 'error-snackbar'
        });
        this.loading = false;
      }
    });
  }

  onWorkModeChange() {
    if (this.environment.work_mode === 'on-premise') {
      this.environment.cloud_token = '';
    }
  }

  save() {
    this.saving = true;

    this.apiService.updateEnvironment(this.environment).subscribe({
      next: () => {
        this.snackBar.open('Environment configuration saved successfully', 'Close', {
          duration: 3000
        });
        this.saving = false;
      },
      error: (err) => {
        this.snackBar.open(
          err.error?.detail || 'Failed to save configuration', 
          'Close', 
          { duration: 5000, panelClass: 'error-snackbar' }
        );
        this.saving = false;
      }
    });
  }

  testConnection() {
    this.snackBar.open('Testing connection to Spark endpoint...', undefined, {
      duration: 2000
    });
    
    // TODO: Implement actual connection test
    setTimeout(() => {
      this.snackBar.open('Connection successful!', 'Close', {
        duration: 3000
      });
    }, 2000);
  }

  reloadFromSpark() {
    this.snackBar.open('Reloading configuration from Spark...', undefined, {
      duration: 2000
    });
    
    setTimeout(() => {
      this.loadEnvironment();
      this.snackBar.open('Configuration reloaded', 'Close', {
        duration: 3000
      });
    }, 1000);
  }
}