package api

import (
  "log"
  "strings"
  "time"
  "io/fs"
  "os"
  "path/filepath"

  "github.com/gofiber/fiber/v2"
  _ "github.com/mattn/go-sqlite3"
  sq "github.com/Masterminds/squirrel"
  "github.com/gofiber/fiber/v2/middleware/session"
  "github.com/gofiber/template/html/v2"

  "zedshaw.games/webapp/data"
)

var STORE *session.Store


func GetApiLogout(c *fiber.Ctx) error {
  err := LogoutUser(c)
  if err != nil { return IfErrNil(err, c) }

  return c.Redirect("/")
}

func GetApiStream(c *fiber.Ctx) error {
  authed, _, err := CheckAuthed(c)
  if NotAuthed(err, authed) { return IfErrNil(err, c) }

  sql, args, err := sq.Select("*").From("stream").ToSql()
  err = data.SelectJson[data.Stream](c, err, sql, args...)

  return IfErrNil(err, c)
}

func GetApiStreamId(c *fiber.Ctx) error {
  sql, args, err := sq.Select("*").
    From("stream").Where("id=?", c.Params("id")).ToSql()

  err = data.GetJson[data.Stream](c, err, sql, args...)
  return IfErrNil(err, c)
}

func GetApiStreamIdLinks(c *fiber.Ctx) error {
  sql, args, err := sq.Select("*").
   From("stream_link").
   Where("stream_id=?", c.Params("id")).ToSql()

  err = data.SelectJson[data.Link](c, err, sql, args...)

  return IfErrNil(err, c)
}

func PostApiRegister(c *fiber.Ctx) error {
  user, err := ReceivePost[data.User](c)
  if err != nil { return IfErrNil(err, c) }

  err = SetUserPassword(user)
  if err != nil { return IfErrNil(err, c) }

  sql, args, err := sq.Insert("user").
    Columns("username", "email", "password").
    Values(user.Username, user.Email, user.Password).ToSql()

  err = data.Exec(err, sql, args...)
  if err != nil { return IfErrNil(err, c) }

  return c.Redirect("/login/")
}

func PostApiLogin(c *fiber.Ctx) error {
  var user data.User

  login, err := ReceivePost[data.Login](c)
  if(err != nil) { return IfErrNil(err, c) }

  pass_good, err := LoginUser(&user, login)
  if err != nil { return IfErrNil(err, c) }

  if pass_good {
    sess, err := STORE.Get(c)
    if err != nil { return IfErrNil(err, c) }

    sess.Set("authenticated", true)
    err = sess.Save()
    if err != nil { return IfErrNil(err, c) }

    return c.Redirect("/")
  } else {
    return c.Redirect("/login/")
  }
}

func PostApiLink(c *fiber.Ctx) error {
  var sql string
  var args []interface{}

  link, err := ReceivePost[data.Link](c)
  if err != nil { goto fail }

  sql, args, err = sq.Insert("stream_blah").
    Columns("stream_id", "url", "description").
    Values(link.StreamId, link.Url, link.Description).ToSql()

  err = data.Exec(err, sql, args...)
  if(err != nil) { goto fail }

  return c.Redirect("/live/")

  fail:
     return IfErrNil(err, c)
}

func RenderPages(pages_path string, target string) {

  engine := html.New(pages_path, ".html")
  engine.Load()

  err := filepath.WalkDir(pages_path,
    func(path string, d fs.DirEntry, err error) error  {
      if !d.IsDir() {
        if err != nil { log.Printf("ERROR: %v", err) }

        dir := filepath.Dir(path)
        err = os.MkdirAll(dir, 0750)
        if err != nil { log.Fatalf("ERROR making dir %s, %v", dir, err) }

        split_path := strings.Split(path, string(os.PathSeparator))[1:]
        source_name := filepath.Join(split_path...)
        ext := filepath.Ext(source_name)
        name, found := strings.CutSuffix(source_name, ext)

        if found {
          log.Printf("name=%s, ext=%s, dir=%s, found=%v", name, ext, dir, found)

          prefixed_path := append([]string{target}, split_path...)

          target_path := filepath.Join(prefixed_path...)
          log.Printf("target_path: %s", target_path)

          out, err := os.OpenFile(target_path, os.O_RDWR|os.O_CREATE, 0644)
          if err != nil { log.Fatalf("ERROR writing file %s", target_path) }

          err = engine.Render(out, "game/1/turings-tarpit/index", fiber.Map{"Title": "Hello"})
          if err != nil { log.Fatalf("failed to render %s, error=%v", path, err) }
          out.Close()
        }
      }

      return nil
    })

  if err != nil { log.Fatalf("can't walk content") }
}

func Setup(app *fiber.App) {
  STORE = session.New()

  RenderPages("./pages", "./public")

  app.Static("/", "./public", fiber.Static{
    Compress: false,
    CacheDuration: 1 * time.Nanosecond,
  })

  app.Get("/api/stream", GetApiStream)
  app.Get("/api/logout", GetApiLogout)
  app.Get("/api/stream/:id", GetApiStreamId)
  app.Get("/api/stream/:id/links", GetApiStreamIdLinks)
  app.Post("/api/login", PostApiLogin)
  app.Post("/api/link", PostApiLink)
  app.Post("/api/register", PostApiRegister)
}

func Shutdown() {
  log.Println("Shutting down controllers...")
}