package github

import (
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"strings"

	"github.com/Pingu-Studio/MaidnCLI/internal/assets"
	"github.com/Pingu-Studio/MaidnCLI/internal/utils"
)

func BuildFluxConfig(chartOwner, gitURL, manifestsRepo string) string {
	return fmt.Sprintf(`---
apiVersion: source.toolkit.fluxcd.io/v1beta2
kind: HelmRepository
metadata:
  name: ghcr-charts
  namespace: flux-system
spec:
  interval: 5m
  type: oci
  url: oci://ghcr.io/%s
  secretRef:
    name: ghcr-auth
---
apiVersion: source.toolkit.fluxcd.io/v1
kind: GitRepository
metadata:
  name: cicd-deployment-manifests
  namespace: flux-system
spec:
  interval: 1m0s
  url: %s
  ref:
    branch: main
  secretRef:
    name: github-auth
---
apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: namespaces
  namespace: flux-system
spec:
  dependsOn:
    - name: vault-instance
    - name: democratic-csi
    - name: metallb-config
  interval: 10m
  path: ./namespaces
  prune: true
  sourceRef:
    kind: GitRepository
    name: cicd-deployment-manifests
---
apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: preview-apps
  namespace: flux-system
spec:
  dependsOn:
    - name: namespaces
  interval: 2m0s
  path: ./apps/previews
  prune: true
  sourceRef:
    kind: GitRepository
    name: cicd-deployment-manifests
---
apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: staging-apps
  namespace: flux-system
spec:
  dependsOn:
    - name: namespaces
  interval: 2m0s
  path: ./apps/staging
  prune: true
  sourceRef:
    kind: GitRepository
    name: cicd-deployment-manifests
---
apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: production-apps
  namespace: flux-system
spec:
  dependsOn:
    - name: namespaces
  interval: 2m0s
  path: ./apps/production
  prune: true
  sourceRef:
    kind: GitRepository
    name: cicd-deployment-manifests
`, chartOwner, gitURL)
}

type RepoManager struct {
	OrgName           string
	ManifestsRepoName string
	FluxRepoName      string
}

func NewRepoManager(org, manifestsRepo, fluxRepo string) *RepoManager {
	return &RepoManager{OrgName: org, ManifestsRepoName: manifestsRepo, FluxRepoName: fluxRepo}
}

func (rm *RepoManager) InitializeManifestsRepo() {}
func (rm *RepoManager) InitializeFluxRepo()      {}
func (rm *RepoManager) InitializeAll() error     { return nil }

func WriteManifestsStructure(baseDir, repoName string) error {
	manifestsReadme := fmt.Sprintf(assets.ManifestsReadmeTmpl, repoName)
	utils.WriteFile(filepath.Join(baseDir, "README.md"), manifestsReadme)
	namespacesDir := filepath.Join(baseDir, "namespaces")
	os.MkdirAll(namespacesDir, 0755)
	utils.WriteFile(filepath.Join(namespacesDir, "staging.yaml"), "apiVersion: v1\nkind: Namespace\nmetadata:\n  name: staging\n")
	utils.WriteFile(filepath.Join(namespacesDir, "production.yaml"), "apiVersion: v1\nkind: Namespace\nmetadata:\n  name: production\n")
	utils.WriteFile(filepath.Join(namespacesDir, "kustomization.yaml"), "apiVersion: kustomize.config.k8s.io/v1beta1\nkind: Kustomization\nresources:\n  - staging.yaml\n  - production.yaml\n")
	for _, env := range []string{"staging", "production", "previews"} {
		dirPath := filepath.Join(baseDir, "apps", env)
		os.MkdirAll(dirPath, 0755)
		utils.WriteFile(filepath.Join(dirPath, ".gitkeep"), "")
	}
	return nil
}

func WriteFluxStructure(baseDir, repoName, clusterPath, fluxConfig string) error {
	fluxReadme := fmt.Sprintf(assets.FluxReadmeTmpl, repoName)
	utils.WriteFile(filepath.Join(baseDir, "README.md"), fluxReadme)
	clusterDir := filepath.Join(baseDir, strings.TrimPrefix(clusterPath, "./"))
	os.MkdirAll(clusterDir, 0755)
	utils.WriteFile(filepath.Join(clusterDir, "cicd-manifests-repo.yaml"), fluxConfig)
	return nil
}

func CommitAndPush(tempDir string) error {
	utils.RunCommandInDir(tempDir, "git", "config", "user.name", "Maidn")
	utils.RunCommandInDir(tempDir, "git", "config", "user.email", "maidn@free-maidn.com")
	utils.RunCommandInDir(tempDir, "git", "add", ".")
	statusCmd := exec.Command("git", "status", "--porcelain")
	statusCmd.Dir = tempDir
	output, _ := statusCmd.Output()
	if len(output) == 0 {
		return nil
	}
	if err := utils.RunCommandInDir(tempDir, "git", "commit", "-m", "feat: initialize repository structure for CI/CD"); err != nil {
		return err
	}
	return utils.RunCommandInDir(tempDir, "git", "push", "origin", "main")
}