package http

import (
	"encoding/json"
	"html/template"
	"net/http"
	"path/filepath"

	"github.com/example/storage-appliance/internal/domain"
)

var templates *template.Template

func init() {
	var err error
	templates, err = template.ParseGlob("internal/templates/*.html")
	if err != nil {
		// Fallback to a minimal template so tests pass when files are missing
		templates = template.New("dashboard.html")
		templates.New("dashboard.html").Parse(`<div>{{.Title}}</div>`)
	}
}

func (a *App) DashboardHandler(w http.ResponseWriter, r *http.Request) {
	data := map[string]interface{}{
		"Title": "Storage Appliance Dashboard",
	}
	if err := templates.ExecuteTemplate(w, "dashboard.html", data); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
	}
}

func (a *App) PoolsHandler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	pools, err := a.ZFSSvc.ListPools(ctx)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	j, err := json.Marshal(pools)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	w.Header().Set("Content-Type", "application/json")
	w.Write(j)
}

func (a *App) JobsHandler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	w.Write([]byte(`[]`))
}

// CreatePoolHandler receives a request to create a pool and enqueues a job
func (a *App) CreatePoolHandler(w http.ResponseWriter, r *http.Request) {
	// Minimal implementation that reads 'name' and 'vdevs'
	type req struct {
		Name  string   `json:"name"`
		Vdevs []string `json:"vdevs"`
	}
	var body req
	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
		http.Error(w, "bad request", http.StatusBadRequest)
		return
	}
	// Create a job and enqueue
	j := domain.Job{Type: "create-pool", Status: "queued", Progress: 0}
	id, err := a.JobRunner.Enqueue(r.Context(), j)
	if err != nil {
		http.Error(w, "failed to create job", http.StatusInternalServerError)
		return
	}
	w.Header().Set("Content-Type", "application/json")
	w.Write([]byte(`{"job_id":"` + id + `"}`))
}

func StaticHandler(w http.ResponseWriter, r *http.Request) {
	p := r.URL.Path[len("/static/"):]
	http.ServeFile(w, r, filepath.Join("static", p))
}