package api

import (
	"encoding/json"
	"net/http"

	"novamd/internal/db"
	"novamd/internal/filesystem"
	"novamd/internal/models"
)

func ListWorkspaces(db *db.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, err := getUserID(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		workspaces, err := db.GetWorkspacesByUserID(userID)
		if err != nil {
			http.Error(w, "Failed to list workspaces", http.StatusInternalServerError)
			return
		}

		respondJSON(w, workspaces)
	}
}

func CreateWorkspace(db *db.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, err := getUserID(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		var requestBody struct {
			Name string `json:"name"`
		}

		if err := json.NewDecoder(r.Body).Decode(&requestBody); err != nil {
			http.Error(w, "Invalid request body", http.StatusBadRequest)
			return
		}

		workspace := &models.Workspace{
			UserID: userID,
			Name:   requestBody.Name,
		}

		if err := db.CreateWorkspace(workspace); err != nil {
			http.Error(w, "Failed to create workspace", http.StatusInternalServerError)
			return
		}

		respondJSON(w, workspace)
	}
}

func GetWorkspace(db *db.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, workspaceID, err := getUserAndWorkspaceIDs(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		workspace, err := db.GetWorkspaceByID(workspaceID)
		if err != nil {
			http.Error(w, "Workspace not found", http.StatusNotFound)
			return
		}

		if workspace.UserID != userID {
			http.Error(w, "Unauthorized access to workspace", http.StatusForbidden)
			return
		}

		respondJSON(w, workspace)
	}
}

func UpdateWorkspace(db *db.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, workspaceID, err := getUserAndWorkspaceIDs(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		var requestBody struct {
			Name string `json:"name"`
		}

		if err := json.NewDecoder(r.Body).Decode(&requestBody); err != nil {
			http.Error(w, "Invalid request body", http.StatusBadRequest)
			return
		}

		workspace, err := db.GetWorkspaceByID(workspaceID)
		if err != nil {
			http.Error(w, "Workspace not found", http.StatusNotFound)
			return
		}

		if workspace.UserID != userID {
			http.Error(w, "Unauthorized access to workspace", http.StatusForbidden)
			return
		}

		workspace.Name = requestBody.Name
		if err := db.UpdateWorkspace(workspace); err != nil {
			http.Error(w, "Failed to update workspace", http.StatusInternalServerError)
			return
		}

		respondJSON(w, map[string]string{"name": workspace.Name})
	}
}

func DeleteWorkspace(db *db.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, workspaceID, err := getUserAndWorkspaceIDs(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		workspace, err := db.GetWorkspaceByID(workspaceID)
		if err != nil {
			http.Error(w, "Workspace not found", http.StatusNotFound)
			return
		}

		if workspace.UserID != userID {
			http.Error(w, "Unauthorized access to workspace", http.StatusForbidden)
			return
		}

		if err := db.DeleteWorkspace(workspaceID); err != nil {
			http.Error(w, "Failed to delete workspace", http.StatusInternalServerError)
			return
		}

		w.WriteHeader(http.StatusOK)
		w.Write([]byte("Workspace deleted successfully"))
	}
}

func GetLastWorkspace(db *db.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, err := getUserID(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		workspaceID, err := db.GetLastWorkspaceID(userID)
		if err != nil {
			http.Error(w, "Failed to get last workspace", http.StatusInternalServerError)
			return
		}

		respondJSON(w, map[string]int{"lastWorkspaceId": workspaceID})
	}
}

func UpdateLastWorkspace(db *db.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, err := getUserID(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		var requestBody struct {
			WorkspaceID int `json:"workspaceId"`
		}

		if err := json.NewDecoder(r.Body).Decode(&requestBody); err != nil {
			http.Error(w, "Invalid request body", http.StatusBadRequest)
			return
		}

		if err := db.UpdateLastWorkspace(userID, requestBody.WorkspaceID); err != nil {
			http.Error(w, "Failed to update last workspace", http.StatusInternalServerError)
			return
		}

		respondJSON(w, map[string]string{"message": "Last workspace updated successfully"})
	}
}

func GetWorkspaceSettings(db *db.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		_, workspaceID, err := getUserAndWorkspaceIDs(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		settings, err := db.GetWorkspaceSettings(workspaceID)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		respondJSON(w, settings)
	}
}

func UpdateWorkspaceSettings(db *db.DB, fs *filesystem.FileSystem) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		userID, workspaceID, err := getUserAndWorkspaceIDs(r)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		var settings models.WorkspaceSettings
		if err := json.NewDecoder(r.Body).Decode(&settings); err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		settings.WorkspaceID = workspaceID

		if err := db.SaveWorkspaceSettings(&settings); err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		if settings.Settings.GitEnabled {
			err := fs.SetupGitRepo(userID, workspaceID, settings.Settings.GitURL, settings.Settings.GitUser, settings.Settings.GitToken)
			if err != nil {
				http.Error(w, "Failed to setup git repo", http.StatusInternalServerError)
				return
			}
		} else {
			fs.DisableGitRepo(userID, workspaceID)
		}

		respondJSON(w, settings)
	}
}