package handlers

import (
	"fmt"

	"git.bhasher.com/bhasher/focus/backend/db"
	"git.bhasher.com/bhasher/focus/backend/types"
	"git.bhasher.com/bhasher/focus/backend/utils"
	"github.com/gofiber/fiber/v2"
)

func GetAllProjects(c *fiber.Ctx) error {
	projects, err := db.GetAllProjects()
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": "Cannot retrieve projects",
			"trace": fmt.Sprint(err),
		})
	}

	halProjects := make([]fiber.Map, len(projects))
	for i, p := range projects {
		halProjects[i] = fiber.Map{
			"project": p,
			"_links":  utils.HALProjectLinks(p.ID),
		}
	}

	return utils.SendHAL(c, fiber.StatusOK, fiber.Map{
		"_links": fiber.Map{
			"self": fiber.Map{"href": "/api/projects"},
		},
		"_embedded": fiber.Map{
			"projects": halProjects,
		},
	})
}

func GetProject(c *fiber.Ctx) error {
	id, err := c.ParamsInt("id")
	if err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid project ID"})
	}

	project, err := db.GetProject(id)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": "Error fetching project",
			"trace": fmt.Sprint(err),
		})
	}
	if project == nil {
		return c.SendStatus(fiber.StatusNotFound)
	}

	return utils.SendHAL(c, fiber.StatusOK, fiber.Map{
		"project": project,
		"_links":  utils.HALProjectLinks(project.ID),
	})
}

func CreateProject(c *fiber.Ctx) error {
	p := new(types.Project)
	if err := c.BodyParser(p); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Error parsing request"})
	}

	id, err := db.CreateProject(*p)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": "Error creating project",
			"trace": fmt.Sprint(err),
		})
	}

	c.Location(fmt.Sprintf("/api/projects/%v", id))
	return utils.SendHAL(c, fiber.StatusCreated, fiber.Map{
		"id":     id,
		"_links": utils.HALProjectLinks(id),
	})
}

func UpdateProject(c *fiber.Ctx) error {
	id, err := c.ParamsInt("id")
	if err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid project ID"})
	}

	p := types.Project{ID: id}
	if err := c.BodyParser(&p); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Error parsing request"})
	}

	exists, err := db.ExistProject(id)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": "Error finding project",
			"trace": fmt.Sprint(err),
		})
	}

	if !exists {
		return c.SendStatus(fiber.StatusNotFound)
	}

	err = db.UpdateProject(p)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": "Error updating project",
			"trace": fmt.Sprint(err),
		})
	}

	return c.SendStatus(fiber.StatusNoContent)
}

func DeleteProject(c *fiber.Ctx) error {
	id, err := c.ParamsInt("id")
	if err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid project ID"})
	}

	exists, err := db.ExistProject(id)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": "Error finding project",
			"trace": fmt.Sprint(err),
		})
	}

	if !exists {
		return c.SendStatus(fiber.StatusNotFound)
	}

	err = db.DeleteProject(id)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": "Error deleting project",
			"trace": fmt.Sprint(err),
		})
	}

	return c.SendStatus(fiber.StatusNoContent)
}