package app

import (
	"log"
	"os"
	"os/exec"
	"path/filepath"

	"charm.land/bubbles/v2/key"
	tea "charm.land/bubbletea/v2"
	"github.com/anotherhadi/spilltea/internal/config"
	"github.com/anotherhadi/spilltea/internal/intercept"
	"github.com/anotherhadi/spilltea/internal/keys"
	"github.com/anotherhadi/spilltea/internal/plugins"
	proxyPkg "github.com/anotherhadi/spilltea/internal/proxy"
	copyasUI "github.com/anotherhadi/spilltea/internal/ui/components/copyas"
	notificationsUI "github.com/anotherhadi/spilltea/internal/ui/components/notifications"
	diffUI "github.com/anotherhadi/spilltea/internal/ui/diff"
	findingsUI "github.com/anotherhadi/spilltea/internal/ui/findings"
	historyUI "github.com/anotherhadi/spilltea/internal/ui/history"
	interceptUI "github.com/anotherhadi/spilltea/internal/ui/intercept"
	replayUI "github.com/anotherhadi/spilltea/internal/ui/replay"
	scopeUI "github.com/anotherhadi/spilltea/internal/ui/scope"
)

func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	// Broker messages must always re-register their watchers
	switch msg := msg.(type) {
	case notificationsUI.NotificationMsg:
		var cmd tea.Cmd
		m.notifications, cmd = m.notifications.Update(msg)
		return m, cmd
	case notificationsUI.DismissMsg:
		var cmd tea.Cmd
		m.notifications, cmd = m.notifications.Update(msg)
		return m, cmd
	case intercept.RequestArrivedMsg:
		updated, cmd := m.intercept.Update(msg)
		m.intercept = updated.(interceptUI.Model)
		return m, tea.Batch(cmd, intercept.WaitForRequest(m.broker))
	case intercept.ResponseArrivedMsg:
		updated, cmd := m.intercept.Update(msg)
		m.intercept = updated.(interceptUI.Model)
		return m, tea.Batch(cmd, intercept.WaitForResponse(m.broker))

	case plugins.PluginNotifMsg:
		cmd := plugins.WaitForNotif(m.pluginManager)
		notifCmd := func() tea.Msg {
			return notificationsUI.NotificationMsg{
				Title: msg.Title,
				Body:  msg.Body,
				Kind:  notificationsUI.KindInfo,
			}
		}
		return m, tea.Batch(cmd, notifCmd)

	case plugins.PluginQuitMsg:
		log.Printf("plugin quit: %s", msg.Reason)
		m.pluginManager.RunOnQuit()
		return m, tea.Quit
	}

	if m.copyAs.IsOpen() {
		if ws, ok := msg.(tea.WindowSizeMsg); ok {
			m.width = ws.Width
			m.height = ws.Height
			m.copyAs.SetSize(ws.Width, ws.Height)
			m.resizeChildren()
			return m, nil
		}
		var cmd tea.Cmd
		m.copyAs, cmd = m.copyAs.Update(msg)
		return m, cmd
	}

	switch msg := msg.(type) {
	case tea.WindowSizeMsg:
		m.width = msg.Width
		m.height = msg.Height
		m.resizeChildren()

	case scopeUI.ScopeChangedMsg:
		m.broker.SetScope(msg.Whitelist, msg.Blacklist)
		if m.database != nil {
			if err := m.database.SaveScope(msg.Whitelist, msg.Blacklist); err != nil {
				log.Printf("failed to persist scope: %v", err)
			}
		}
		return m, nil

	case proxyPkg.ErrMsg:
		if msg.Err != nil {
			log.Printf("proxy error: %v", msg.Err)
		}
		return m, nil

	case tickMsg:
		var cmds []tea.Cmd
		cmds = append(cmds, tickCmd())
		if m.page == pageHistory {
			cmds = append(cmds, m.history.RefreshCmd())
		}
		cmds = append(cmds, findingsUI.RefreshCmd(m.database))
		return m, tea.Batch(cmds...)

	case findingsUI.FindingsLoadedMsg:
		updated, cmd := m.findingsPage.Update(msg)
		m.findingsPage = updated.(findingsUI.Model)
		return m, cmd

	case replayUI.SendToReplayMsg:
		updated, cmd := m.replay.Update(msg)
		m.replay = updated.(replayUI.Model)
		if config.Global.Replay.SwitchToPageOnSend {
			m.page = pageReplay
			m.resizeChildren()
		} else {
			return m, tea.Batch(cmd, func() tea.Msg {
				return notificationsUI.NotificationMsg{
					Title: "Replay",
					Body:  "Request queued in replay",
					Kind:  notificationsUI.KindInfo,
				}
			})
		}
		return m, cmd

	case diffUI.SendToDiffMsg:
		updated, cmd := m.diff.Update(msg)
		m.diff = updated.(diffUI.Model)
		return m, cmd

	case diffUI.DiffReadyMsg:
		m.page = pageDiff
		m.resizeChildren()
		return m, nil

	case historyUI.EntriesLoadedMsg:
		updated, cmd := m.history.Update(msg)
		m.history = updated.(historyUI.Model)
		return m, cmd

	case tea.KeyPressMsg:
		// ctrl+c always quits, even when a textarea is focused.
		if msg.String() == "ctrl+c" {
			m.pluginManager.RunOnQuit()
			return m, tea.Quit
		}
		if key.Matches(msg, keys.Keys.Global.Quit) && !m.activeIsEditing() {
			m.pluginManager.RunOnQuit()
			return m, tea.Quit
		}

		if key.Matches(msg, keys.Keys.Global.OpenLogs) {
			editor := os.Getenv("EDITOR")
			if editor == "" {
				editor = "vi"
			}
			logPath := filepath.Join(filepath.Dir(m.projectPath), "logs.log")
			return m, tea.ExecProcess(exec.Command(editor, logPath), nil)
		}

		if !m.activeIsEditing() {
			switch {
			case key.Matches(msg, keys.Keys.Global.CopyRequest):
				if m.page == pageDiff {
					if raw := m.diff.CurrentRaw(); raw != "" {
						m.copyAs.SetSize(m.width, m.height)
						m.copyAs.Open(copyasUI.OpenMsg{
							RawRequest: raw,
							Scheme:     "https",
						})
					}
				} else if m.page == pageIntercept {
					if raw := m.intercept.CurrentRaw(); raw != "" {
						m.copyAs.SetSize(m.width, m.height)
						m.copyAs.Open(copyasUI.OpenMsg{
							RawRequest: raw,
							Scheme:     m.intercept.CurrentScheme(),
						})
					}
				}
				return m, nil

			case key.Matches(msg, keys.Keys.Global.ToggleSidebar):
				m.cycleSidebarState()
				m.resizeChildren()

			default:
				if p, ok := pageShortcuts[msg.String()]; ok {
					prev := m.page
					m.page = p
					if p == pageHistory && prev != pageHistory {
						return m, m.history.RefreshCmd()
					}
					if p == pageFindings {
						return m, findingsUI.RefreshCmd(m.database)
					}
				}
			}
		}
	}

	var cmd tea.Cmd
	m, cmd = m.updateActivePage(msg)
	return m, cmd
}

func (m Model) activeIsEditing() bool {
	for _, e := range pageRegistry {
		if e.id == m.page && e.isEditing != nil {
			return e.isEditing(&m)
		}
	}
	return false
}

func (m Model) updateActivePage(msg tea.Msg) (Model, tea.Cmd) {
	for _, e := range pageRegistry {
		if e.id == m.page && e.update != nil {
			cmd := e.update(&m, msg)
			return m, cmd
		}
	}
	return m, nil
}

func (m *Model) resizeChildren() {
	sidebarW := m.getSidebarWidth()
	h := m.height
	for _, e := range pageRegistry {
		if e.resize == nil {
			continue
		}
		e.resize(m, m.width-sidebarW, h)
	}
	m.notifications.SetSize(m.width, m.height)
}