package server

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"log"
	"mime/multipart"
	"net/http"
	"os/exec"
	"strings"
)

type DeployRequest struct {
	Config multipart.File `form:"config"`
	Code   multipart.File `form:"code"`
}

type DeployResponse struct {
	AppID int64 `json:"app_id"`
}

type ProjectConfig struct {
	Name        string   `json:"name"`
	Urls        []string `json:"urls"`
	Port        int      `json:"port"`
	EnvFile     string   `json:"env_file"`
	Environment []string `json:"environment"`
}

func (s *FluxServer) DeployHandler(w http.ResponseWriter, r *http.Request) {
	err := r.ParseMultipartForm(10 << 30) // 10 GiB
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	// bind to DeployRequest struct
	var deployRequest DeployRequest
	deployRequest.Config, _, err = r.FormFile("config")
	if err != nil {
		http.Error(w, "No flux.json found", http.StatusBadRequest)
		return
	}
	defer deployRequest.Config.Close()

	deployRequest.Code, _, err = r.FormFile("code")
	if err != nil {
		http.Error(w, "No code archive found", http.StatusBadRequest)
		return
	}
	defer deployRequest.Code.Close()

	var projectConfig ProjectConfig
	if err := json.NewDecoder(deployRequest.Config).Decode(&projectConfig); err != nil {
		log.Printf("Failed to decode config: %v", err)
		http.Error(w, "Invalid flux.json", http.StatusBadRequest)
		return
	}

	if projectConfig.Name == "" {
		http.Error(w, "No project name specified", http.StatusBadRequest)
		return
	}

	if projectConfig.Urls == nil || len(projectConfig.Urls) == 0 {
		http.Error(w, "No deployment urls specified", http.StatusBadRequest)
		return
	}

	if projectConfig.Port == 0 {
		http.Error(w, "No port specified", http.StatusBadRequest)
		return
	}

	log.Printf("Deploying project %s to %s", projectConfig.Name, projectConfig.Urls)

	projectPath, err := s.UploadAppCode(deployRequest.Code, projectConfig)
	if err != nil {
		log.Printf("Failed to upload code: %v", err)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	prepareCmd := exec.Command("go", "generate")
	prepareCmd.Dir = projectPath
	err = prepareCmd.Run()
	if err != nil {
		log.Printf("Failed to prepare project: %s", err)
		http.Error(w, fmt.Sprintf("Failed to prepare project: %s", err), http.StatusInternalServerError)
		return
	}

	imageName := fmt.Sprintf("%s-image", projectConfig.Name)
	buildCmd := exec.Command("pack", "build", imageName, "--builder", s.config.Builder)
	buildCmd.Dir = projectPath
	err = buildCmd.Run()
	if err != nil {
		log.Printf("Failed to build image: %s", err)
		http.Error(w, fmt.Sprintf("Failed to build image: %s", err), http.StatusInternalServerError)
		return
	}

	containerID, err := s.containerManager.DeployContainer(r.Context(), imageName, projectConfig.Name, projectPath, projectConfig)
	if err != nil {
		log.Printf("Failed to deploy container: %v", err)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	deploymentResult, err := s.db.Exec("INSERT INTO deployments (urls) VALUES (?)", strings.Join(projectConfig.Urls, ","))
	if err != nil {
		log.Printf("Failed to insert deployment: %v", err)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	deploymentID, err := deploymentResult.LastInsertId()
	if err != nil {
		log.Printf("Failed to get deployment id: %v", err)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	_, err = s.db.Exec("INSERT INTO containers (container_id, deployment_id, status) VALUES (?, ?, ?)", containerID, deploymentID, "pending")
	if err != nil {
		log.Printf("Failed to get container id: %v", err)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	appExists := s.db.QueryRow("SELECT * FROM apps WHERE name = ?", projectConfig.Name)
	configBytes, err := json.Marshal(projectConfig)
	if err != nil {
		log.Printf("Failed to marshal project config: %v", err)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	var appResult sql.Result

	if appExists.Err() == sql.ErrNoRows {
		// create app in the database
		appResult, err = s.db.Exec("INSERT INTO apps (name, image, project_path, project_config, deployment_id) VALUES (?, ?, ?, ?, ?)", projectConfig.Name, imageName, projectPath, configBytes, deploymentID)
		if err != nil {
			log.Printf("Failed to insert app: %v", err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	} else {
		// update app in the database
		appResult, err = s.db.Exec("UPDATE apps SET project_config = ?, deployment_id = ? WHERE name = ?", configBytes, deploymentID, projectConfig.Name)
		if err != nil {
			log.Printf("Failed to update app: %v", err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	}

	appId, err := appResult.LastInsertId()
	if err != nil {
		log.Printf("Failed to get app id: %v", err)
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	json.NewEncoder(w).Encode(DeployResponse{
		AppID: appId,
	})
}

func (s *FluxServer) ListAppsHandler(w http.ResponseWriter, r *http.Request) {
	// Implement app listing logic
	apps := s.db.QueryRow("SELECT * FROM apps")

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(apps)
}