package forgejo

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

func TestCreateIssue_Success(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// Verify request method and path
		if r.Method != http.MethodPost {
			t.Errorf("expected POST, got %s", r.Method)
		}
		expectedPath := "/api/v1/repos/testowner/testrepo/issues"
		if r.URL.Path != expectedPath {
			t.Errorf("expected path %s, got %s", expectedPath, r.URL.Path)
		}

		// Verify auth header
		authHeader := r.Header.Get("Authorization")
		if authHeader != "token test-token" {
			t.Errorf("expected Authorization header %q, got %q", "token test-token", authHeader)
		}

		// Verify content type
		if ct := r.Header.Get("Content-Type"); ct != "application/json" {
			t.Errorf("expected Content-Type application/json, got %s", ct)
		}

		// Decode request body
		var req CreateIssueRequest
		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
			t.Fatalf("failed to decode request body: %v", err)
		}
		if req.Title != "Test Issue" {
			t.Errorf("expected title %q, got %q", "Test Issue", req.Title)
		}

		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusCreated)
		json.NewEncoder(w).Encode(Issue{
			Number: 7,
			Title:  "Test Issue",
			State:  "open",
		})
	}))
	defer server.Close()

	client := NewClient(server.URL, "test-token")
	issue, err := client.CreateIssue("testowner", "testrepo", CreateIssueRequest{
		Title: "Test Issue",
		Body:  "This is a test issue body.",
	})
	if err != nil {
		t.Fatalf("expected no error, got: %v", err)
	}

	if issue.Number != 7 {
		t.Errorf("expected issue number 7, got %d", issue.Number)
	}
	if issue.Title != "Test Issue" {
		t.Errorf("expected issue title %q, got %q", "Test Issue", issue.Title)
	}
	if issue.State != "open" {
		t.Errorf("expected issue state %q, got %q", "open", issue.State)
	}
}

func TestCreateIssue_ServerError(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusInternalServerError)
		w.Write([]byte("internal server error"))
	}))
	defer server.Close()

	client := NewClient(server.URL, "test-token")
	_, err := client.CreateIssue("testowner", "testrepo", CreateIssueRequest{
		Title: "Test Issue",
		Body:  "Body",
	})
	if err == nil {
		t.Fatal("expected error for 500 response, got nil")
	}
}

func TestCreateIssue_NotFound(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusNotFound)
		w.Write([]byte("not found"))
	}))
	defer server.Close()

	client := NewClient(server.URL, "test-token")
	_, err := client.CreateIssue("testowner", "testrepo", CreateIssueRequest{
		Title: "Test Issue",
		Body:  "Body",
	})
	if err == nil {
		t.Fatal("expected error for 404 response, got nil")
	}
}

func TestCreateComment_Success(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost {
			t.Errorf("expected POST, got %s", r.Method)
		}
		expectedPath := "/api/v1/repos/owner/repo/issues/5/comments"
		if r.URL.Path != expectedPath {
			t.Errorf("expected path %s, got %s", expectedPath, r.URL.Path)
		}

		authHeader := r.Header.Get("Authorization")
		if authHeader != "token my-api-token" {
			t.Errorf("expected Authorization header %q, got %q", "token my-api-token", authHeader)
		}

		var req CreateCommentRequest
		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
			t.Fatalf("failed to decode request body: %v", err)
		}
		if req.Body != "A comment" {
			t.Errorf("expected body %q, got %q", "A comment", req.Body)
		}

		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(http.StatusCreated)
		json.NewEncoder(w).Encode(Comment{
			ID:   99,
			Body: "A comment",
		})
	}))
	defer server.Close()

	client := NewClient(server.URL, "my-api-token")
	comment, err := client.CreateComment("owner", "repo", 5, CreateCommentRequest{
		Body: "A comment",
	})
	if err != nil {
		t.Fatalf("expected no error, got: %v", err)
	}

	if comment.ID != 99 {
		t.Errorf("expected comment ID 99, got %d", comment.ID)
	}
	if comment.Body != "A comment" {
		t.Errorf("expected comment body %q, got %q", "A comment", comment.Body)
	}
}

func TestCreateComment_ServerError(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusInternalServerError)
		w.Write([]byte("error"))
	}))
	defer server.Close()

	client := NewClient(server.URL, "test-token")
	_, err := client.CreateComment("owner", "repo", 1, CreateCommentRequest{
		Body: "A comment",
	})
	if err == nil {
		t.Fatal("expected error for 500 response, got nil")
	}
}