package gitea_test

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

	"github.com/mathiasbq/hyperguild/ingestion/internal/gitea"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

const testToken = "super-secret-token-value"

func TestNewNilWhenUnconfigured(t *testing.T) {
	assert.Nil(t, gitea.New("", testToken))
	assert.Nil(t, gitea.New("https://git.example", ""))
}

func TestCreateIssueForcesOwnerAndAuth(t *testing.T) {
	var gotPath, gotAuth, gotBody string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		gotPath = r.URL.Path
		gotAuth = r.Header.Get("Authorization")
		b, _ := io.ReadAll(r.Body)
		gotBody = string(b)
		assert.Equal(t, http.MethodPost, r.Method)
		w.WriteHeader(http.StatusCreated)
		_ = json.NewEncoder(w).Encode(map[string]any{"number": 42, "html_url": "https://git.d-ma.be/mathias/hyperguild/issues/42"})
	}))
	defer srv.Close()

	c := gitea.New(srv.URL, testToken)
	require.NotNil(t, c)
	ref, err := c.CreateIssue(context.Background(), "hyperguild", "Do the thing", "details")
	require.NoError(t, err)

	assert.Equal(t, "/api/v1/repos/mathias/hyperguild/issues", gotPath, "owner forced to mathias")
	assert.Equal(t, "token "+testToken, gotAuth)
	assert.Contains(t, gotBody, "Do the thing")
	assert.Equal(t, "hyperguild", ref.Repo)
	assert.Equal(t, 42, ref.Number)
	assert.Contains(t, ref.URL, "/issues/42")
}

func TestCommentIssue(t *testing.T) {
	var gotPath string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		gotPath = r.URL.Path
		w.WriteHeader(http.StatusCreated)
		_ = json.NewEncoder(w).Encode(map[string]any{"html_url": "https://git/c/1"})
	}))
	defer srv.Close()

	ref, err := gitea.New(srv.URL, testToken).CommentIssue(context.Background(), "hyperguild", 7, "a comment")
	require.NoError(t, err)
	assert.Equal(t, "/api/v1/repos/mathias/hyperguild/issues/7/comments", gotPath)
	assert.Equal(t, 7, ref.Number)
}

func TestCloseIssueWithComment(t *testing.T) {
	var paths []string
	var states []string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		paths = append(paths, r.Method+" "+r.URL.Path)
		if r.Method == http.MethodPatch {
			var body map[string]any
			b, _ := io.ReadAll(r.Body)
			_ = json.Unmarshal(b, &body)
			states = append(states, body["state"].(string))
		}
		w.WriteHeader(http.StatusOK)
		_ = json.NewEncoder(w).Encode(map[string]any{"number": 9, "html_url": "https://git/i/9"})
	}))
	defer srv.Close()

	ref, err := gitea.New(srv.URL, testToken).CloseIssue(context.Background(), "hyperguild", 9, "closing because done")
	require.NoError(t, err)
	assert.Equal(t, 9, ref.Number)
	// Comment posted first, then state PATCHed to closed.
	assert.Contains(t, paths, "POST /api/v1/repos/mathias/hyperguild/issues/9/comments")
	assert.Contains(t, paths, "PATCH /api/v1/repos/mathias/hyperguild/issues/9")
	assert.Equal(t, []string{"closed"}, states)
}

func TestCloseIssueNoComment(t *testing.T) {
	var commented bool
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if strings.HasSuffix(r.URL.Path, "/comments") {
			commented = true
		}
		w.WriteHeader(http.StatusOK)
		_ = json.NewEncoder(w).Encode(map[string]any{"number": 3, "html_url": "https://git/i/3"})
	}))
	defer srv.Close()

	_, err := gitea.New(srv.URL, testToken).CloseIssue(context.Background(), "hyperguild", 3, "")
	require.NoError(t, err)
	assert.False(t, commented, "empty comment ⇒ no comment POST")
}

func TestErrorPathDoesNotLeakToken(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		w.WriteHeader(http.StatusInternalServerError)
		_, _ = w.Write([]byte("boom"))
	}))
	defer srv.Close()

	_, err := gitea.New(srv.URL, testToken).CreateIssue(context.Background(), "hyperguild", "t", "b")
	require.Error(t, err)
	assert.NotContains(t, err.Error(), testToken, "token must never appear in an error message")
	assert.Contains(t, err.Error(), "500")
}

func TestWriteFileCreatesNewFile(t *testing.T) {
	var getPath, postPath, postBody string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.Method {
		case http.MethodGet:
			getPath = r.URL.Path
			w.WriteHeader(http.StatusNotFound) // file does not exist yet
		case http.MethodPost: // gitea contents API: POST = create
			postPath = r.URL.Path
			b, _ := io.ReadAll(r.Body)
			postBody = string(b)
			w.WriteHeader(http.StatusCreated)
			_ = json.NewEncoder(w).Encode(map[string]any{"content": map[string]any{"html_url": "https://git/x"}})
		default:
			t.Errorf("create must POST, got %s", r.Method)
		}
	}))
	defer srv.Close()

	err := gitea.New(srv.URL, testToken).WriteFile(context.Background(),
		"ai-sessions", "summaries/claude-code/2026-06/2026-06-23-x-abcd1234.md", "# Summary\n\nbody\n")
	require.NoError(t, err)
	assert.Equal(t, "/api/v1/repos/mathias/ai-sessions/contents/summaries/claude-code/2026-06/2026-06-23-x-abcd1234.md", getPath)
	assert.Equal(t, getPath, postPath)
	// base64 of the content, no sha on create.
	assert.Contains(t, postBody, "IyBTdW1tYXJ5") // base64("# Summary")
	assert.NotContains(t, postBody, `"sha"`)
}

func TestWriteFileUpdatesExisting(t *testing.T) {
	var putBody string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.Method {
		case http.MethodGet:
			w.WriteHeader(http.StatusOK)
			_ = json.NewEncoder(w).Encode(map[string]any{"sha": "deadbeef"})
		case http.MethodPut:
			b, _ := io.ReadAll(r.Body)
			putBody = string(b)
			w.WriteHeader(http.StatusOK)
			_ = json.NewEncoder(w).Encode(map[string]any{"content": map[string]any{"html_url": "https://git/x"}})
		}
	}))
	defer srv.Close()

	err := gitea.New(srv.URL, testToken).WriteFile(context.Background(), "ai-sessions", "p/x.md", "new")
	require.NoError(t, err)
	assert.Contains(t, putBody, `"sha":"deadbeef"`, "existing file → update with sha")
}

func TestWriteFileErrorNoTokenLeak(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method == http.MethodGet {
			w.WriteHeader(http.StatusNotFound)
			return
		}
		w.WriteHeader(http.StatusUnprocessableEntity)
		_, _ = w.Write([]byte("bad"))
	}))
	defer srv.Close()
	err := gitea.New(srv.URL, testToken).WriteFile(context.Background(), "ai-sessions", "p/x.md", "x")
	require.Error(t, err)
	assert.NotContains(t, err.Error(), testToken)
	assert.Contains(t, err.Error(), "422")
}