package main

import (
  "encoding/json"
  "fmt"
  "io"
  "log"
  "strings"
  "net/http"
  nomad "github.com/hashicorp/nomad/api"
  //"code.gitea.io/sdk/gitea"
)

type GitUser struct {
    Name string `json:"name"`
    Email string `json:"email"`
    Username string `json:username"`
}

type GiteaCommit struct {
    Id string `json:"id"`
    Message string `json:"message"`
    Url string `json:"string"`
    Author GitUser `json:"author"`
    Committer GitUser `json:"committer"`
    Timestamp string `json:"timestamp"`
}

type GiteaAccount struct {
    Id int64 `json:"id"`
    Login string `json:"login"`
    FullName string `json:"full_name"`
    Email string `json:"email"`
    AvatarUrl string `json:"avatar_url"`
    Username string `json:"username"`
}

type GiteaRepository struct {
    Id int64 `json:"id"`
    Owner GiteaAccount `json:"owner"`
    Description string `json:"description"`
    Private bool `json:"private"`
    Fork bool `json:"private"`
    HtmlUrl string `json:"html_url"`
    SshUrl string `json:"ssh_url"`
    CloneUrl string `json:"clone_url"`
    Website string `json:"website"`
    StarsCount int64 `json:"stars_count"`
    ForksCount int64 `json:"forks_count"`
    WatchersCount int64 `json:"watchers_count"`
    OpenIssuesCount int64 `json:"open_issues_count"`
    DefaultBranch string `json:"default_branch"`
    CreatedAt string `json:"created_at"`
    UpdatedAt string `json:"updated_at"`
}

type GiteaNotification struct {
    Secret string `json:"secret"`
    Ref string `json:"ref"`
    Before string `json:"before"`
    After string `json:"after"`
    CompareUrl string `json:"compare_url"`
    Commits []GiteaCommit `json:"commits"`
    Repository GiteaRepository `json:"repository"`
    Pusher GiteaAccount `json:"pusher"`
    Sender GiteaAccount `json:"sender"`
}

func hook(w http.ResponseWriter, r *http.Request) {
    if r.Method != http.MethodPost {
        http.Error(w, "Hook only support POST requests", http.StatusBadRequest)
    }

    //@FIXME check for key (in consul?)

    var notification GiteaNotification
    dec := json.NewDecoder(r.Body)
    if err := dec.Decode(&notification); err != nil {
        http.Error(w, "Can't parse your request JSON", http.StatusBadRequest)
        return
    }

    log.Printf("Gitea notification: %+v\n", notification)
    meta := map[string]string{
        "REPO_URL": notification.Repository.CloneUrl,
        "COMMIT": notification.After,
        // @FIXME: this code is not correct, this is a hack
        "BRANCH": strings.ReplaceAll(notification.Ref, "refs/heads/", ""),
    }

    // @FIXME logic on how to inject secrets securely

    jobs := NomadClient.Jobs()
    dres, dmeta, err := jobs.Dispatch("builder", meta, []byte{}, "albatros", &nomad.WriteOptions{})
    if err != nil {
        http.Error(w, "Can't submit your job to Nomad", http.StatusInternalServerError)
    }
    log.Printf("Query info: %+v\n", dmeta)
    log.Printf("Job info: %+v\n", dres)

    fmt.Println(notification.CompareUrl)
    io.WriteString(w, "ok")
}

func build(w http.ResponseWriter, r *http.Request) {
    q := r.URL.Query()
    jobID, ok := q["job"]
    if !ok || len(jobID) < 1 {
        http.Error(w, "Missing query parameter 'job'. Try adding '?job=xxx'", http.StatusBadRequest)
        return
    }

    jobs := NomadClient.Jobs()
    allocList, query, err := jobs.Allocations(jobID[0], true, &nomad.QueryOptions{})
    if err != nil {
        http.Error(w, "Unable to fetch your job on Nomad.", http.StatusInternalServerError)
        return
    }
    log.Printf("Query info: %+v\n", query)
    if len(allocList) < 1 {
        http.Error(w, "Job does not contain at least 1 allocation, can't display logs", http.StatusNotFound)
        return
    }

    alloc := allocList[0]
    log.Printf("Alloc: %+v\n", alloc)

} 

var NomadClient *nomad.Client

func main() {
    var err error
    nomadConfig := nomad.DefaultConfig()
    nomadConfig.Namespace = "ci"
    // @TODO read env for encrypted parameters
    NomadClient, err = nomad.NewClient(nomadConfig)
    if err != nil {
        log.Fatal("Unable to connect to Nomad, check your config and setup")
    }

    http.HandleFunc("/hook", hook)
    http.HandleFunc("/build", build)

    fmt.Println("albatros (:8080)")
    if err = http.ListenAndServe(":8080", nil); err != nil {
        log.Fatal("Can't start HTTP server")
    }
}