package gitea

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

func TestPostReview_WithComments(t *testing.T) {
	var gotPayload struct {
		Body     string `json:"body"`
		Event    string `json:"event"`
		Comments []struct {
			Path        string `json:"path"`
			NewPosition int64  `json:"new_position"`
			Body        string `json:"body"`
		} `json:"comments"`
	}

	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		json.NewDecoder(r.Body).Decode(&gotPayload)
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(200)
		json.NewEncoder(w).Encode(map[string]any{
			"id":   99,
			"body": gotPayload.Body,
			"user": map[string]any{"login": "bot"},
		})
	}))
	defer server.Close()

	client := NewClient(server.URL, "test-token")
	comments := []ReviewComment{
		{Path: "main.go", NewPosition: 42, Body: "[MAJOR] Something bad"},
		{Path: "util.go", NewPosition: 10, Body: "[MINOR] Style issue"},
	}

	_, err := client.PostReview(context.Background(), "owner", "repo", 1, "REQUEST_CHANGES", "summary", "", comments)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	if len(gotPayload.Comments) != 2 {
		t.Fatalf("expected 2 comments, got %d", len(gotPayload.Comments))
	}
	if gotPayload.Comments[0].Path != "main.go" {
		t.Errorf("expected path main.go, got %s", gotPayload.Comments[0].Path)
	}
	if gotPayload.Comments[0].NewPosition != 42 {
		t.Errorf("expected new_position 42, got %d", gotPayload.Comments[0].NewPosition)
	}
	if gotPayload.Comments[1].Body != "[MINOR] Style issue" {
		t.Errorf("unexpected body: %s", gotPayload.Comments[1].Body)
	}
}

func TestPostReview_NilComments(t *testing.T) {
	var gotPayload map[string]any

	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		json.NewDecoder(r.Body).Decode(&gotPayload)
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(200)
		json.NewEncoder(w).Encode(map[string]any{
			"id":   100,
			"body": "test",
			"user": map[string]any{"login": "bot"},
		})
	}))
	defer server.Close()

	client := NewClient(server.URL, "test-token")
	_, err := client.PostReview(context.Background(), "owner", "repo", 1, "APPROVED", "all good", "", nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	// With nil comments, the field should be omitted (omitempty)
	comments, ok := gotPayload["comments"]
	if ok && comments != nil {
		arr, isArr := comments.([]any)
		if isArr && len(arr) > 0 {
			t.Error("expected no comments in payload when nil passed")
		}
	}
}