"""GitHub-powered deployment agent for direct deployment actions."""

from __future__ import annotations

import os
from typing import Any, Dict, List, Optional

from enhanced_mcp_client import EnhancedMCPClient
from schemas import ReadinessPlan, ReadinessRequest


class DeploymentAgent:
    """Handles actual deployment actions via GitHub MCP."""

    def __init__(self):
        self.mcp_client = EnhancedMCPClient()

    async def prepare_deployment(
        self, request: ReadinessRequest, plan: ReadinessPlan
    ) -> Dict[str, Any]:
        """Prepare deployment configuration and actions."""
        github_repo = os.getenv("GITHUB_REPO")  # Format: owner/repo
        github_branch = os.getenv("GITHUB_BRANCH", "main")
        
        deployment_config = {
            "repo": github_repo,
            "branch": github_branch,
            "ready": False,
            "actions": []
        }

        if not github_repo:
            deployment_config["actions"].append({
                "type": "error",
                "message": "GITHUB_REPO not configured",
                "actionable": False
            })
            return deployment_config

        # Check if deployment workflow exists
        deployment_config["actions"].append({
            "type": "check_workflow",
            "message": f"Checking for deployment workflow in {github_repo}",
            "actionable": True
        })

        # Prepare deployment PR
        pr_title = f"Deploy: {request.release_goal}"
        pr_body = f"""
## Deployment Readiness Summary

**Project**: {request.project_name}
**Goal**: {request.release_goal}

### Checklist Items
{chr(10).join(f"- [ ] {item.title}" for item in plan.items[:5])}

### Code Summary
{request.code_summary[:200]}...

### Infrastructure Notes
{request.infra_notes or "None provided"}

---
*Generated by Deployment Readiness Copilot*
        """.strip()

        deployment_config["actions"].append({
            "type": "create_pr",
            "title": pr_title,
            "body": pr_body,
            "branch": f"deploy/{request.project_name.lower().replace(' ', '-')}",
            "actionable": True
        })

        # Trigger deployment workflow
        deployment_config["actions"].append({
            "type": "trigger_workflow",
            "workflow": ".github/workflows/deploy.yml",
            "branch": github_branch,
            "actionable": True
        })

        deployment_config["ready"] = True
        return deployment_config

    async def execute_deployment(
        self, deployment_config: Dict[str, Any]
    ) -> Dict[str, Any]:
        """Execute deployment actions via MCP to selected platform."""
        results = {
            "success": False,
            "actions_executed": [],
            "errors": [],
            "message": ""
        }

        platform = deployment_config.get("platform", "").lower()
        framework = deployment_config.get("framework", "").lower()
        repo = deployment_config.get("repo")

        if not platform or platform == "none":
            results["message"] = "No deployment platform selected"
            return results

        try:
            # Deploy to Vercel via MCP
            if platform == "vercel":
                if repo:
                    # Use Vercel MCP to deploy
                    deploy_result = await self.mcp_client.deploy_to_vercel(
                        repo=repo,
                        framework=framework
                    )
                    results["actions_executed"].append({
                        "type": "vercel_deploy",
                        "result": deploy_result
                    })
                    results["success"] = True
                    results["message"] = f"✅ Deployed to Vercel (framework: {framework})"
                else:
                    results["message"] = "⚠️ GitHub repo required for Vercel deployment. Configure GITHUB_REPO."
            
            # Deploy to Netlify via MCP
            elif platform == "netlify":
                if repo:
                    deploy_result = await self.mcp_client.deploy_to_netlify(
                        repo=repo,
                        framework=framework
                    )
                    results["actions_executed"].append({
                        "type": "netlify_deploy",
                        "result": deploy_result
                    })
                    results["success"] = True
                    results["message"] = f"✅ Deployed to Netlify (framework: {framework})"
                else:
                    results["message"] = "⚠️ GitHub repo required for Netlify deployment."
            
            # Deploy to AWS via MCP
            elif platform == "aws":
                deploy_result = await self.mcp_client.deploy_to_aws(
                    repo=repo,
                    framework=framework,
                    config=deployment_config
                )
                results["actions_executed"].append({
                    "type": "aws_deploy",
                    "result": deploy_result
                })
                results["success"] = True
                results["message"] = f"✅ AWS deployment initiated (framework: {framework})"
            
            # Deploy to GCP via MCP
            elif platform == "gcp":
                deploy_result = await self.mcp_client.deploy_to_gcp(
                    repo=repo,
                    framework=framework,
                    config=deployment_config
                )
                results["actions_executed"].append({
                    "type": "gcp_deploy",
                    "result": deploy_result
                })
                results["success"] = True
                results["message"] = f"✅ GCP deployment initiated (framework: {framework})"
            
            # Deploy to Azure via MCP
            elif platform == "azure":
                deploy_result = await self.mcp_client.deploy_to_azure(
                    repo=repo,
                    framework=framework,
                    config=deployment_config
                )
                results["actions_executed"].append({
                    "type": "azure_deploy",
                    "result": deploy_result
                })
                results["success"] = True
                results["message"] = f"✅ Azure deployment initiated (framework: {framework})"
            
            # Deploy to Railway via MCP
            elif platform == "railway":
                deploy_result = await self.mcp_client.deploy_to_railway(
                    repo=repo,
                    framework=framework
                )
                results["actions_executed"].append({
                    "type": "railway_deploy",
                    "result": deploy_result
                })
                results["success"] = True
                results["message"] = f"✅ Railway deployment initiated (framework: {framework})"
            
            # Deploy to Render via MCP
            elif platform == "render":
                deploy_result = await self.mcp_client.deploy_to_render(
                    repo=repo,
                    framework=framework
                )
                results["actions_executed"].append({
                    "type": "render_deploy",
                    "result": deploy_result
                })
                results["success"] = True
                results["message"] = f"✅ Render deployment initiated (framework: {framework})"
            
            # Deploy to Fly.io via MCP
            elif platform == "fly.io":
                deploy_result = await self.mcp_client.deploy_to_flyio(
                    repo=repo,
                    framework=framework
                )
                results["actions_executed"].append({
                    "type": "flyio_deploy",
                    "result": deploy_result
                })
                results["success"] = True
                results["message"] = f"✅ Fly.io deployment initiated (framework: {framework})"
            
            # Kubernetes deployment
            elif platform == "kubernetes":
                deploy_result = await self.mcp_client.deploy_to_kubernetes(
                    repo=repo,
                    framework=framework,
                    config=deployment_config
                )
                results["actions_executed"].append({
                    "type": "k8s_deploy",
                    "result": deploy_result
                })
                results["success"] = True
                results["message"] = f"✅ Kubernetes deployment initiated (framework: {framework})"
            
            # Docker deployment
            elif platform == "docker":
                deploy_result = await self.mcp_client.deploy_to_docker(
                    repo=repo,
                    framework=framework,
                    config=deployment_config
                )
                results["actions_executed"].append({
                    "type": "docker_deploy",
                    "result": deploy_result
                })
                results["success"] = True
                results["message"] = f"✅ Docker deployment initiated (framework: {framework})"
            
            else:
                results["message"] = f"⚠️ Platform '{platform}' deployment via MCP not yet implemented"
                results["errors"].append(f"Unsupported platform: {platform}")

        except Exception as e:
            results["errors"].append({
                "platform": platform,
                "error": str(e)
            })
            results["message"] = f"❌ Deployment error: {str(e)}"

        return results

    async def create_pull_request(self, title: str, body: str, branch: str, files: Dict[str, str]) -> str:
        """Create a GitHub Pull Request with the specified changes."""
        token = os.getenv("GITHUB_TOKEN")
        repo_name = os.getenv("GITHUB_REPO")
        
        if not token or not repo_name:
            return "❌ GITHUB_TOKEN or GITHUB_REPO not set."
            
        try:
            from github import Github
            g = Github(token)
            repo = g.get_repo(repo_name)
            
            # Get main branch
            source_branch = repo.get_branch("main")
            
            # Create new branch
            try:
                repo.create_git_ref(ref=f"refs/heads/{branch}", sha=source_branch.commit.sha)
            except Exception:
                # Branch might already exist
                pass
                
            # Commit files
            for file_path, content in files.items():
                try:
                    contents = repo.get_contents(file_path, ref=branch)
                    repo.update_file(contents.path, f"Update {file_path}", content, contents.sha, branch=branch)
                except Exception:
                    repo.create_file(file_path, f"Create {file_path}", content, branch=branch)
                    
            # Create PR
            pr = repo.create_pull(title=title, body=body, head=branch, base="main")
            return f"✅ Pull Request Created: {pr.html_url}"
            
        except ImportError:
            return "❌ PyGithub not installed."
        except Exception as e:
            return f"❌ Failed to create PR: {str(e)}"