package tools_test

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

	"gitea.d-ma.be/mathias/gitea-mcp/internal/allowlist"
	"gitea.d-ma.be/mathias/gitea-mcp/internal/gitea"
	"gitea.d-ma.be/mathias/gitea-mcp/internal/tools"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestIssueListTool(t *testing.T) {
	tests := []struct {
		name      string
		input     string
		wantQuery map[string]string
		respBody  string
		assert    func(t *testing.T, out string)
	}{
		{
			name:      "happy path defaults",
			input:     `{"owner":"mathias","name":"infra"}`,
			wantQuery: map[string]string{"type": "issues", "state": "open", "page": "1", "limit": "30"},
			respBody:  `[{"number":42,"title":"fix auth","state":"open","html_url":"http://gitea.example/m/infra/issues/42"},{"number":41,"title":"add tests","state":"open"}]`,
			assert: func(t *testing.T, out string) {
				assert.Contains(t, out, `"number":42`)
				assert.Contains(t, out, `"number":41`)
			},
		},
		{
			name:      "state filter",
			input:     `{"owner":"mathias","name":"infra","state":"closed"}`,
			wantQuery: map[string]string{"type": "issues", "state": "closed"},
			respBody:  `[]`,
			assert: func(t *testing.T, out string) {
				assert.Contains(t, out, `"issues":[]`)
			},
		},
		{
			name:      "label + since filter",
			input:     `{"owner":"mathias","name":"infra","labels":"bug,critical","since":"2026-05-01T00:00:00Z"}`,
			wantQuery: map[string]string{"labels": "bug,critical", "since": "2026-05-01T00:00:00Z"},
			respBody:  `[]`,
			assert:    func(t *testing.T, out string) {},
		},
		{
			name:      "empty result",
			input:     `{"owner":"mathias","name":"infra"}`,
			wantQuery: map[string]string{"state": "open"},
			respBody:  `[]`,
			assert: func(t *testing.T, out string) {
				assert.Contains(t, out, `"issues":[]`)
				assert.NotContains(t, out, `next_page`)
			},
		},
	}
	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
				assert.Equal(t, http.MethodGet, r.Method)
				assert.Equal(t, "/api/v1/repos/mathias/infra/issues", r.URL.Path)
				q := r.URL.Query()
				for k, v := range tc.wantQuery {
					assert.Equal(t, v, q.Get(k), "query param %q", k)
				}
				w.Header().Set("Content-Type", "application/json")
				_, _ = w.Write([]byte(tc.respBody))
			}))
			defer srv.Close()

			tool := tools.NewIssueList(gitea.NewClient(srv.URL, "tok"), allowlist.New([]string{"mathias"}))
			out, err := tool.Call(context.Background(), json.RawMessage(tc.input))
			require.NoError(t, err)
			tc.assert(t, string(out))
		})
	}
}

func TestIssueListAllowlistRejects(t *testing.T) {
	tool := tools.NewIssueList(gitea.NewClient("http://unused", ""), allowlist.New([]string{"mathias"}))
	_, err := tool.Call(context.Background(), json.RawMessage(`{"owner":"evil","name":"x"}`))
	require.Error(t, err)
}