package aw

import (
	"context"
	"encoding/json"
	"io"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"
)

func TestEnsureBucketPostsCreate(t *testing.T) {
	var gotPath string
	var gotBody map[string]string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		gotPath = r.URL.Path
		if r.Method != http.MethodPost {
			t.Errorf("method = %q, want POST", r.Method)
		}
		b, _ := io.ReadAll(r.Body)
		_ = json.Unmarshal(b, &gotBody)
		w.WriteHeader(http.StatusOK)
	}))
	defer srv.Close()

	c := New(srv.URL)
	if err := c.EnsureBucket(context.Background(), "keel.events", "keel.event", "keel"); err != nil {
		t.Fatalf("EnsureBucket: %v", err)
	}
	if gotPath != "/api/0/buckets/keel.events" {
		t.Fatalf("path = %q", gotPath)
	}
	if gotBody["type"] != "keel.event" || gotBody["client"] != "keel" {
		t.Fatalf("body = %+v", gotBody)
	}
}

func TestEnsureBucketTreatsExistsAsOK(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusNotModified) // AW returns 304 when the bucket exists
	}))
	defer srv.Close()
	if err := New(srv.URL).EnsureBucket(context.Background(), "keel.events", "keel.event", "keel"); err != nil {
		t.Fatalf("existing bucket should be OK, got %v", err)
	}
}

func TestEnsureBucketErrorsOnServerError(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusInternalServerError)
	}))
	defer srv.Close()
	if err := New(srv.URL).EnsureBucket(context.Background(), "keel.events", "keel.event", "keel"); err == nil {
		t.Fatal("expected error on 500")
	}
}

func TestInsertPostsEventArray(t *testing.T) {
	var gotPath string
	var gotEvents []map[string]any
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		gotPath = r.URL.Path
		if r.Method != http.MethodPost {
			t.Errorf("method = %q, want POST", r.Method)
		}
		b, _ := io.ReadAll(r.Body)
		_ = json.Unmarshal(b, &gotEvents)
		w.WriteHeader(http.StatusOK)
	}))
	defer srv.Close()

	c := New(srv.URL)
	ev := Event{Timestamp: time.Unix(1000, 0).UTC(), Data: map[string]any{"_kind": "proposal_made"}}
	if err := c.Insert(context.Background(), "keel.events", ev); err != nil {
		t.Fatalf("Insert: %v", err)
	}
	if gotPath != "/api/0/buckets/keel.events/events" {
		t.Fatalf("path = %q", gotPath)
	}
	if len(gotEvents) != 1 || gotEvents[0]["data"].(map[string]any)["_kind"] != "proposal_made" {
		t.Fatalf("events = %+v", gotEvents)
	}
}

func TestRecentDecodesNewestFirst(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet {
			t.Errorf("method = %q, want GET", r.Method)
		}
		if got := r.URL.Query().Get("limit"); got != "5" {
			t.Errorf("limit = %q, want 5", got)
		}
		_, _ = io.WriteString(w, `[
			{"id":2,"timestamp":"2026-06-05T10:00:00+00:00","duration":0,"data":{"_kind":"proposal_made"}},
			{"id":1,"timestamp":"2026-06-04T10:00:00+00:00","duration":0,"data":{"_kind":"action_taken"}}
		]`)
	}))
	defer srv.Close()

	got, err := New(srv.URL).Recent(context.Background(), "keel.events", 5)
	if err != nil {
		t.Fatalf("Recent: %v", err)
	}
	if len(got) != 2 || got[0].Data["_kind"] != "proposal_made" {
		t.Fatalf("got = %+v", got)
	}
}