package summary

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

func TestPushClient_Push(t *testing.T) {
	var received MetricsPayload
	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)
		}
		if ct := r.Header.Get("Content-Type"); ct != "application/json" {
			t.Errorf("expected Content-Type application/json, got %s", ct)
		}
		if err := json.NewDecoder(r.Body).Decode(&received); err != nil {
			t.Errorf("failed to decode body: %v", err)
		}
		w.WriteHeader(http.StatusCreated)
	}))
	defer server.Close()

	client := NewPushClient(server.URL)
	client.ctx = ExecutionContext{
		Organization: "test-org",
		Repository:   "test-repo",
		Workflow:     "ci.yml",
		Job:          "build",
		RunID:        "12345",
	}

	summary := &RunSummary{
		StartTime:       time.Now().Add(-time.Minute),
		EndTime:         time.Now(),
		DurationSeconds: 60.0,
		SampleCount:     10,
		CPUTotal:        StatSummary{Peak: 80.0, Avg: 50.0, P95: 75.0},
	}

	err := client.Push(context.Background(), summary)
	if err != nil {
		t.Fatalf("Push() error = %v", err)
	}

	if received.Execution.Organization != "test-org" {
		t.Errorf("Organization = %q, want %q", received.Execution.Organization, "test-org")
	}
	if received.Execution.RunID != "12345" {
		t.Errorf("RunID = %q, want %q", received.Execution.RunID, "12345")
	}
	if received.Summary.SampleCount != 10 {
		t.Errorf("SampleCount = %d, want %d", received.Summary.SampleCount, 10)
	}
}

func TestPushClient_Push_NilSummary(t *testing.T) {
	client := NewPushClient("http://localhost:9999")
	err := client.Push(context.Background(), nil)
	if err != nil {
		t.Errorf("Push(nil) error = %v, want nil", err)
	}
}

func TestPushClient_Push_ServerError(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusInternalServerError)
	}))
	defer server.Close()

	client := NewPushClient(server.URL)
	client.ctx = ExecutionContext{RunID: "test"}

	err := client.Push(context.Background(), &RunSummary{})
	if err == nil {
		t.Error("Push() expected error for 500 response, got nil")
	}
}

func TestPushClient_Push_ConnectionError(t *testing.T) {
	client := NewPushClient("http://localhost:1") // Invalid port
	client.ctx = ExecutionContext{RunID: "test"}

	err := client.Push(context.Background(), &RunSummary{})
	if err == nil {
		t.Error("Push() expected error for connection failure, got nil")
	}
}

func TestExecutionContextFromEnv(t *testing.T) {
	// Save and restore env
	origVars := map[string]string{
		"GITHUB_REPOSITORY_OWNER": "",
		"GITHUB_REPOSITORY":       "",
		"GITHUB_WORKFLOW":         "",
		"GITHUB_JOB":              "",
		"GITHUB_RUN_ID":           "",
	}
	for k := range origVars {
		origVars[k] = getEnvWithFallback(k)
	}
	defer func() {
		for k, v := range origVars {
			if v == "" {
				t.Setenv(k, "")
			}
		}
	}()

	t.Setenv("GITHUB_REPOSITORY_OWNER", "my-org")
	t.Setenv("GITHUB_REPOSITORY", "my-org/my-repo")
	t.Setenv("GITHUB_WORKFLOW", "CI")
	t.Setenv("GITHUB_JOB", "test")
	t.Setenv("GITHUB_RUN_ID", "999")

	ctx := ExecutionContextFromEnv()

	if ctx.Organization != "my-org" {
		t.Errorf("Organization = %q, want %q", ctx.Organization, "my-org")
	}
	if ctx.Repository != "my-org/my-repo" {
		t.Errorf("Repository = %q, want %q", ctx.Repository, "my-org/my-repo")
	}
	if ctx.Workflow != "CI" {
		t.Errorf("Workflow = %q, want %q", ctx.Workflow, "CI")
	}
	if ctx.Job != "test" {
		t.Errorf("Job = %q, want %q", ctx.Job, "test")
	}
	if ctx.RunID != "999" {
		t.Errorf("RunID = %q, want %q", ctx.RunID, "999")
	}
}

func TestExecutionContextFromEnv_GiteaFallback(t *testing.T) {
	t.Setenv("GITHUB_RUN_ID", "")
	t.Setenv("GITEA_RUN_ID", "gitea-123")

	ctx := ExecutionContextFromEnv()

	if ctx.RunID != "gitea-123" {
		t.Errorf("RunID = %q, want %q (Gitea fallback)", ctx.RunID, "gitea-123")
	}
}

func TestPushClient_ExecutionContext(t *testing.T) {
	client := NewPushClient("http://example.com")
	client.ctx = ExecutionContext{
		Organization: "org",
		Repository:   "repo",
		RunID:        "run",
	}

	ctx := client.ExecutionContext()
	if ctx.Organization != "org" {
		t.Errorf("Organization = %q, want %q", ctx.Organization, "org")
	}
}