package platform

import (
	"encoding/json"
	"io"
	"net/http"
	"time"
)

func nowTime() time.Time { return time.Now() }

// Mount attaches the orchestration routes. The goal-engine /v1/runs routes stay separate.
func Mount(mux *http.ServeMux, st *Store) {
	mux.HandleFunc("POST /v1/workspaces", func(w http.ResponseWriter, r *http.Request) {
		var body struct{ Name string }
		if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		ws, err := st.CreateWorkspace(body.Name)
		write(w, ws, err)
	})
	mux.HandleFunc("POST /v1/agents", func(w http.ResponseWriter, r *http.Request) {
		var a Agent
		if err := json.NewDecoder(r.Body).Decode(&a); err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		created, err := st.CreateAgent(a)
		write(w, created, err)
	})
	mux.HandleFunc("POST /v1/squads", func(w http.ResponseWriter, r *http.Request) {
		var body struct {
			Squad
			Members []SquadMember
		}
		if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		created, err := st.CreateSquad(body.Squad, body.Members)
		write(w, created, err)
	})
	mux.HandleFunc("POST /v1/issues", func(w http.ResponseWriter, r *http.Request) {
		var issue Issue
		if err := json.NewDecoder(r.Body).Decode(&issue); err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		created, err := st.CreateIssue(issue)
		write(w, created, err)
	})
	mux.HandleFunc("POST /v1/issues/{id}/assign", func(w http.ResponseWriter, r *http.Request) {
		var body struct {
			Kind  string
			ID    string
			Start bool
		}
		if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		err := st.AssignIssue(r.PathValue("id"), body.Kind, body.ID, body.Start)
		write(w, map[string]bool{"ok": err == nil}, err)
	})
	mux.HandleFunc("POST /v1/issues/{id}/comments", func(w http.ResponseWriter, r *http.Request) {
		var c Comment
		if err := json.NewDecoder(r.Body).Decode(&c); err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		c.IssueID = r.PathValue("id")
		created, err := st.AddComment(c)
		write(w, created, err)
	})
	mux.HandleFunc("POST /v1/tasks/claim", func(w http.ResponseWriter, r *http.Request) {
		task, ok, err := st.Claim(r.URL.Query().Get("runtime"), nowTime())
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		write(w, map[string]any{"task": task, "ok": ok}, nil)
	})
	mux.HandleFunc("POST /v1/webhooks/autopilots/{token}", func(w http.ResponseWriter, r *http.Request) {
		body, err := io.ReadAll(io.LimitReader(r.Body, 256*1024+1))
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		headers := map[string]string{}
		for _, key := range []string{"Idempotency-Key", "X-GitHub-Delivery", "X-Hub-Signature-256", "X-GitHub-Event"} {
			if v := r.Header.Get(key); v != "" {
				headers[key] = v
			}
		}
		event, err := st.AcceptWebhook(r.PathValue("token"), body, headers)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}
		write(w, map[string]string{"event": event}, nil)
	})
	mux.HandleFunc("GET /v1/events/ws", func(w http.ResponseWriter, r *http.Request) {
		if r.Header.Get("Upgrade") == "" {
			http.Error(w, "upgrade required", http.StatusUpgradeRequired)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte("{\"type\":\"ready\"}\n"))
	})
}

func write(w http.ResponseWriter, v any, err error) {
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	w.Header().Set("Content-Type", "application/json")
	_ = json.NewEncoder(w).Encode(v)
}