package git_test

import (
	"context"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"testing"

	"superwork-tui/internal/git"
)

func makeHookCtx(workspaceRoot, worktreePath, branch string, issue int, main string) git.HookContext {
	return git.HookContext{
		WorkspaceRoot: workspaceRoot,
		WorktreePath:  worktreePath,
		Branch:        branch,
		IssueNumber:   issue,
		MainBranch:    main,
	}
}

func writeScript(t *testing.T, dir, name, content string) string {
	t.Helper()
	p := filepath.Join(dir, name)
	if err := os.WriteFile(p, []byte(content), 0o755); err != nil {
		t.Fatal(err)
	}
	return p
}

// setupWorkspace returns workspaceRoot with .spx/ created.
func setupWorkspace(t *testing.T) (workspaceRoot, spxDir string) {
	t.Helper()
	workspaceRoot = t.TempDir()
	spxDir = filepath.Join(workspaceRoot, ".spx")
	if err := os.MkdirAll(spxDir, 0o755); err != nil {
		t.Fatal(err)
	}
	return
}

// --- RunPostCreateHook ---

func TestRunPostCreateHook_Missing(t *testing.T) {
	root, _ := setupWorkspace(t)
	ctx := makeHookCtx(root, root, "feat/x", 42, "main")
	// No script on disk → skipped.
	result := git.RunPostCreateHook(context.Background(), ctx)
	if result.Status != git.HookStatusSkipped {
		t.Errorf("want skipped, got %v", result.Status)
	}
}

func TestRunPostCreateHook_Ok(t *testing.T) {
	root, spxDir := setupWorkspace(t)
	worktree := t.TempDir()

	// Script writes env vars to a file so we can assert them.
	envFile := filepath.Join(root, "env-dump.txt")
	script := `#!/bin/bash
echo "WORKTREE_PATH=$WORKTREE_PATH" >> "` + envFile + `"
echo "WORKSPACE_ROOT=$WORKSPACE_ROOT" >> "` + envFile + `"
echo "BRANCH=$BRANCH" >> "` + envFile + `"
echo "ISSUE_NUMBER=$ISSUE_NUMBER" >> "` + envFile + `"
echo "MAIN_BRANCH=$MAIN_BRANCH" >> "` + envFile + `"
exit 0
`
	writeScript(t, spxDir, "worktree-post-create.sh", script)

	ctx := makeHookCtx(root, worktree, "feat/my-branch", 99, "develop")
	result := git.RunPostCreateHook(context.Background(), ctx)

	if result.Status != git.HookStatusOk {
		t.Fatalf("want ok, got %v (err=%s stderr=%s)", result.Status, result.ErrorMessage, result.Stderr)
	}
	if result.ExitCode != 0 {
		t.Errorf("want exit code 0, got %d", result.ExitCode)
	}
	if result.ScriptPath == "" {
		t.Error("ScriptPath must not be empty")
	}

	envData, err := os.ReadFile(envFile)
	if err != nil {
		t.Fatalf("env dump not written: %v", err)
	}
	env := string(envData)
	checks := map[string]string{
		"WORKTREE_PATH":  worktree,
		"WORKSPACE_ROOT": root,
		"BRANCH":         "feat/my-branch",
		"ISSUE_NUMBER":   "99",
		"MAIN_BRANCH":    "develop",
	}
	for k, v := range checks {
		if !strings.Contains(env, k+"="+v) {
			t.Errorf("env missing %s=%s; got:\n%s", k, v, env)
		}
	}
}

func TestRunPostCreateHook_Failed(t *testing.T) {
	root, spxDir := setupWorkspace(t)
	writeScript(t, spxDir, "worktree-post-create.sh", "#!/bin/bash\nexit 3\n")

	ctx := makeHookCtx(root, root, "feat/x", 1, "main")
	result := git.RunPostCreateHook(context.Background(), ctx)

	if result.Status != git.HookStatusFailed {
		t.Errorf("want failed, got %v", result.Status)
	}
	if result.ExitCode != 3 {
		t.Errorf("want ExitCode=3, got %d", result.ExitCode)
	}
}

// --- RunPreRemoveHook ---

func TestRunPreRemoveHook_Missing(t *testing.T) {
	root, _ := setupWorkspace(t)
	ctx := makeHookCtx(root, root, "feat/x", 1, "main")
	result := git.RunPreRemoveHook(context.Background(), ctx)
	if result.Status != git.HookStatusSkipped {
		t.Errorf("want skipped, got %v", result.Status)
	}
}

func TestRunPreRemoveHook_Ok(t *testing.T) {
	root, spxDir := setupWorkspace(t)
	writeScript(t, spxDir, "worktree-pre-remove.sh", "#!/bin/bash\nexit 0\n")
	ctx := makeHookCtx(root, root, "feat/x", 1, "main")
	result := git.RunPreRemoveHook(context.Background(), ctx)
	if result.Status != git.HookStatusOk {
		t.Errorf("want ok, got %v", result.Status)
	}
}

// --- RunImplTabPreCreateHook ---

func TestRunImplTabPreCreateHook_Missing(t *testing.T) {
	root, _ := setupWorkspace(t)
	ctx := makeHookCtx(root, root, "feat/x", 1, "main")
	result := git.RunImplTabPreCreateHook(context.Background(), ctx)
	if result.Status != git.HookStatusSkipped {
		t.Errorf("want skipped, got %v", result.Status)
	}
}

func TestRunImplTabPreCreateHook_Ok(t *testing.T) {
	root, spxDir := setupWorkspace(t)
	writeScript(t, spxDir, "impl-tab-pre-create.sh", "#!/bin/bash\nexit 0\n")
	ctx := makeHookCtx(root, root, "feat/x", 7, "main")
	result := git.RunImplTabPreCreateHook(context.Background(), ctx)
	if result.Status != git.HookStatusOk {
		t.Errorf("want ok, got %v", result.Status)
	}
	if result.ExitCode != 0 {
		t.Errorf("want exit 0, got %d", result.ExitCode)
	}
}

func TestRunImplTabPreCreateHook_Failed(t *testing.T) {
	root, spxDir := setupWorkspace(t)
	writeScript(t, spxDir, "impl-tab-pre-create.sh", "#!/bin/bash\nexit 7\n")
	ctx := makeHookCtx(root, root, "feat/x", 1, "main")
	result := git.RunImplTabPreCreateHook(context.Background(), ctx)
	if result.Status != git.HookStatusFailed {
		t.Errorf("want failed, got %v", result.Status)
	}
	if result.ExitCode != 7 {
		t.Errorf("want ExitCode=7, got %d", result.ExitCode)
	}
}

// --- RunImplTabPostCloseHook ---

func TestRunImplTabPostCloseHook_Missing(t *testing.T) {
	root, _ := setupWorkspace(t)
	ctx := makeHookCtx(root, root, "feat/x", 1, "main")
	result := git.RunImplTabPostCloseHook(context.Background(), ctx)
	if result.Status != git.HookStatusSkipped {
		t.Errorf("want skipped, got %v", result.Status)
	}
}

func TestRunImplTabPostCloseHook_Ok(t *testing.T) {
	root, spxDir := setupWorkspace(t)
	writeScript(t, spxDir, "impl-tab-post-close.sh", "#!/bin/bash\nexit 0\n")
	ctx := makeHookCtx(root, root, "feat/x", 3, "main")
	result := git.RunImplTabPostCloseHook(context.Background(), ctx)
	if result.Status != git.HookStatusOk {
		t.Errorf("want ok, got %v", result.Status)
	}
}

// --- CustomScriptPath override ---

func TestRunPostCreateHook_CustomScriptPath(t *testing.T) {
	root, _ := setupWorkspace(t)
	customDir := t.TempDir()
	customScript := filepath.Join(customDir, "my-hook.sh")
	if err := os.WriteFile(customScript, []byte("#!/bin/bash\nexit 0\n"), 0o755); err != nil {
		t.Fatal(err)
	}

	ctx := git.HookContext{
		WorkspaceRoot:    root,
		WorktreePath:     root,
		Branch:           "feat/x",
		IssueNumber:      1,
		MainBranch:       "main",
		CustomScriptPath: customScript, // absolute override
	}
	result := git.RunPostCreateHook(context.Background(), ctx)
	if result.Status != git.HookStatusOk {
		t.Errorf("want ok with custom path, got %v", result.Status)
	}
	if result.ScriptPath != customScript {
		t.Errorf("ScriptPath: want %q, got %q", customScript, result.ScriptPath)
	}
}

// IssueNumber env value must be the decimal string, not anything else.
func TestRunPostCreateHook_IssueNumberEnv(t *testing.T) {
	root, spxDir := setupWorkspace(t)
	envFile := filepath.Join(root, "issue-num.txt")
	script := "#!/bin/bash\necho -n \"$ISSUE_NUMBER\" > \"" + envFile + "\"\nexit 0\n"
	writeScript(t, spxDir, "worktree-post-create.sh", script)

	ctx := makeHookCtx(root, root, "feat/x", 12345, "main")
	result := git.RunPostCreateHook(context.Background(), ctx)
	if result.Status != git.HookStatusOk {
		t.Fatalf("want ok, got %v", result.Status)
	}
	data, err := os.ReadFile(envFile)
	if err != nil {
		t.Fatal(err)
	}
	got := strings.TrimSpace(string(data))
	if got != strconv.Itoa(12345) {
		t.Errorf("ISSUE_NUMBER env: want %q, got %q", "12345", got)
	}
}