// navegator_dashboard — cuadro de mandos para gestionar instancias Chrome con CDP.
//
// v0.3.x: Browsers + Tabs + Tab Detail (placeholder) + Network (DevTools-like) + Agent.
// El menu Layouts persiste imgui.ini + visibilidad de paneles por nombre.
// Ver projects/navegator/apps/navegator_dashboard/app.md.

#include "app_base.h"
#include "core/icons_tabler.h"
#include "core/layout_storage.h"
#include "core/layouts_menu.h"
#include "core/panel_menu.h"
#include "imgui.h"

#include "local_api.h"
#include "agent.h"
#include "dashboard_state.h"

#include <sqlite3.h>

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>

namespace navegator {

void render_browsers_panel(bool* p_open);
void render_tabs_panel(bool* p_open);
void render_tab_detail_panel(bool* p_open);
void render_network_panel(bool* p_open);
void render_autoextract_panel(bool* p_open);
void render_recipes_panel(bool* p_open);

// ---------- Visibilidad de paneles -----------------------------------------
bool show_browsers   = true;
bool show_tabs       = true;
bool show_tab_detail = false;
bool show_network    = false;
bool show_agent      = false;
bool show_autoextract = false;
bool show_recipes     = false;

namespace {
constexpr fn_ui::PanelToggle k_panels[] = {
    {"Browsers",    "Ctrl+1", &show_browsers},
    {"Tabs",        "Ctrl+2", &show_tabs},
    {"Tab Detail",  "Ctrl+3", &show_tab_detail},
    {"Network",     "Ctrl+4", &show_network},
    {"Agent",       "Ctrl+5", &show_agent},
    {"AutoExtract", "Ctrl+6", &show_autoextract},
    {"Recipes",     "Ctrl+7", &show_recipes},
};
} // anon

// ---------- Layouts: storage + sidecar de visibilidad ----------------------
namespace {

sqlite3*               g_extra_db   = nullptr;
fn_ui::LayoutStorage*  g_layouts    = nullptr;
fn_ui::LayoutCallbacks g_layout_cb;
std::string            g_pending_panel_state;

bool extra_open(const char* db_path) {
    if (sqlite3_open(db_path, &g_extra_db) != SQLITE_OK) {
        if (g_extra_db) { sqlite3_close(g_extra_db); g_extra_db = nullptr; }
        return false;
    }
    const char* sql =
        "CREATE TABLE IF NOT EXISTS panel_visibility ("
        "  layout_name TEXT PRIMARY KEY,"
        "  state_json  TEXT NOT NULL,"
        "  updated_at  INTEGER NOT NULL"
        ");";
    char* err = nullptr;
    int rc = sqlite3_exec(g_extra_db, sql, nullptr, nullptr, &err);
    if (err) sqlite3_free(err);
    return rc == SQLITE_OK;
}

bool extra_save(const std::string& name, const std::string& json) {
    if (!g_extra_db) return false;
    const char* sql =
        "INSERT INTO panel_visibility (layout_name, state_json, updated_at) "
        "VALUES (?, ?, strftime('%s','now')) "
        "ON CONFLICT(layout_name) DO UPDATE SET "
        "  state_json = excluded.state_json, "
        "  updated_at = excluded.updated_at;";
    sqlite3_stmt* st = nullptr;
    if (sqlite3_prepare_v2(g_extra_db, sql, -1, &st, nullptr) != SQLITE_OK) return false;
    sqlite3_bind_text(st, 1, name.c_str(), -1, SQLITE_TRANSIENT);
    sqlite3_bind_text(st, 2, json.c_str(), -1, SQLITE_TRANSIENT);
    int rc = sqlite3_step(st);
    sqlite3_finalize(st);
    return rc == SQLITE_DONE;
}

std::string extra_load(const std::string& name) {
    std::string out;
    if (!g_extra_db) return out;
    const char* sql = "SELECT state_json FROM panel_visibility WHERE layout_name = ?;";
    sqlite3_stmt* st = nullptr;
    if (sqlite3_prepare_v2(g_extra_db, sql, -1, &st, nullptr) != SQLITE_OK) return out;
    sqlite3_bind_text(st, 1, name.c_str(), -1, SQLITE_TRANSIENT);
    if (sqlite3_step(st) == SQLITE_ROW) {
        const unsigned char* t = sqlite3_column_text(st, 0);
        if (t) out = reinterpret_cast<const char*>(t);
    }
    sqlite3_finalize(st);
    return out;
}

void extra_del(const std::string& name) {
    if (!g_extra_db) return;
    const char* sql = "DELETE FROM panel_visibility WHERE layout_name = ?;";
    sqlite3_stmt* st = nullptr;
    if (sqlite3_prepare_v2(g_extra_db, sql, -1, &st, nullptr) != SQLITE_OK) return;
    sqlite3_bind_text(st, 1, name.c_str(), -1, SQLITE_TRANSIENT);
    sqlite3_step(st);
    sqlite3_finalize(st);
}

} // anon

// ---------- API publica para tests + main ----------------------------------

std::string capture_panel_state() {
    char buf[384];
    std::snprintf(buf, sizeof(buf),
        "{\"browsers\":%d,\"tabs\":%d,\"tab_detail\":%d,\"network\":%d,\"agent\":%d,"
        "\"autoextract\":%d,\"recipes\":%d}",
        show_browsers ? 1 : 0,
        show_tabs ? 1 : 0,
        show_tab_detail ? 1 : 0,
        show_network ? 1 : 0,
        show_agent ? 1 : 0,
        show_autoextract ? 1 : 0,
        show_recipes ? 1 : 0);
    return buf;
}

void apply_panel_state(const std::string& json) {
    auto pull = [&](const char* key, bool def) -> bool {
        std::string needle = std::string("\"") + key + "\":";
        auto p = json.find(needle);
        if (p == std::string::npos) return def;
        p += needle.size();
        if (p >= json.size()) return def;
        return json[p] == '1' || (json.compare(p, 4, "true") == 0);
    };
    show_browsers    = pull("browsers",    true);
    show_tabs        = pull("tabs",        true);
    show_tab_detail  = pull("tab_detail",  true);
    show_network     = pull("network",     true);
    show_agent       = pull("agent",       false);
    show_autoextract = pull("autoextract", false);
    show_recipes     = pull("recipes",     false);
}

void open_all_panels() {
    show_browsers = show_tabs = show_tab_detail = show_network = true;
    // agent / autoextract / recipes son opt-in: no se reabren con Reset.
}

void setup_layouts(fn::AppConfig& cfg) {
    if (g_layouts) return;  // idempotente

    g_layouts = fn_ui::layout_storage_open(fn::local_path("layouts.db"));
    extra_open(fn::local_path("layouts.db"));

    if (!g_layouts) return;

    fn_ui::layout_storage_make_callbacks(g_layouts, g_layout_cb);

    g_layout_cb.on_save = [](const std::string& name) {
        if (fn_ui::layout_storage_save(g_layouts, name)) {
            extra_save(name, capture_panel_state());
            g_layout_cb.active_name = name;
            fn_ui::layout_storage_set_last_active(g_layouts, name);
        }
    };

    g_layout_cb.on_apply = [](const std::string& name) {
        if (fn_ui::layout_storage_apply(g_layouts, name)) {
            g_pending_panel_state = extra_load(name);
            g_layout_cb.active_name = name;
            fn_ui::layout_storage_set_last_active(g_layouts, name);
        }
    };

    g_layout_cb.on_delete = [](const std::string& name) {
        fn_ui::layout_storage_delete(g_layouts, name);
        extra_del(name);
        if (g_layout_cb.active_name == name) {
            g_layout_cb.active_name.clear();
            fn_ui::layout_storage_set_last_active(g_layouts, "");
        }
    };

    g_layout_cb.on_reset = []() {
        ImGui::LoadIniSettingsFromMemory("", 0);
        ImGui::GetIO().WantSaveIniSettings = true;
        open_all_panels();
        g_layout_cb.active_name.clear();
        fn_ui::layout_storage_set_last_active(g_layouts, "");
    };

    cfg.auto_layouts = false;
    cfg.layouts_cb   = &g_layout_cb;

    // pre_frame se ejecuta entre NewFrame y menubar/auto-dockspace. Es el
    // punto correcto para LoadIniSettingsFromMemory (apply_pending llama a
    // esa funcion). Si lo hacemos mid-frame dentro de render_fn los paneles
    // docked aparecen flotantes hasta el siguiente ciclo.
    cfg.pre_frame = []() { drain_layout_pending(); };

    // Restore-on-open: si hay layout activo persistido y el sidecar de
    // visibilidad existe, lo dejamos pendiente. drain_layout_pending lo
    // recoge en el primer frame.
    std::string last = fn_ui::layout_storage_get_last_active(g_layouts);
    if (!last.empty() && fn_ui::layout_storage_apply(g_layouts, last)) {
        g_pending_panel_state    = extra_load(last);
        g_layout_cb.active_name  = last;
    }
}

bool layout_save(const std::string& name) {
    if (!g_layouts) return false;
    if (!fn_ui::layout_storage_save(g_layouts, name)) return false;
    extra_save(name, capture_panel_state());
    g_layout_cb.active_name = name;
    fn_ui::layout_storage_set_last_active(g_layouts, name);
    return true;
}

bool layout_apply(const std::string& name) {
    if (!g_layouts) return false;
    if (!fn_ui::layout_storage_apply(g_layouts, name)) return false;
    g_pending_panel_state = extra_load(name);
    g_layout_cb.active_name = name;
    fn_ui::layout_storage_set_last_active(g_layouts, name);
    return true;
}

bool layout_delete(const std::string& name) {
    if (!g_layouts) return false;
    bool ok = fn_ui::layout_storage_delete(g_layouts, name);
    extra_del(name);
    if (g_layout_cb.active_name == name) g_layout_cb.active_name.clear();
    return ok;
}

void layout_reset() {
    ImGui::LoadIniSettingsFromMemory("", 0);
    ImGui::GetIO().WantSaveIniSettings = true;
    open_all_panels();
    g_layout_cb.active_name.clear();
}

std::string active_layout_name() {
    return g_layout_cb.active_name;
}

std::string drain_layout_pending() {
    if (!g_layouts) return "";
    std::string applied = fn_ui::layout_storage_apply_pending(g_layouts);
    if (!applied.empty()) {
        g_layout_cb.active_name = applied;
        if (!g_pending_panel_state.empty()) {
            apply_panel_state(g_pending_panel_state);
            g_pending_panel_state.clear();
        } else {
            open_all_panels();
        }
        ImGui::GetIO().WantSaveIniSettings = true;
    }
    return applied;
}

void teardown_layouts() {
    // teardown_layouts corre tras fn::run_app, cuando ImGui::DestroyContext
    // ya se ejecuto. SaveIniSettingsToMemory aqui crashea, asi que NO se hace
    // save-on-close. La consistencia reapertura→layout activo se mantiene via
    // restore-on-open: setup_layouts lee last_active y reaplica el blob del
    // slot. Si el usuario quiere capturar tweaks puntuales debe hacer "Save".
    if (g_extra_db) { sqlite3_close(g_extra_db); g_extra_db = nullptr; }
    if (g_layouts)  { fn_ui::layout_storage_close(g_layouts); g_layouts = nullptr; }
    g_pending_panel_state.clear();
    g_layout_cb = {};
}

} // namespace navegator

// ---------- Render principal (linkable desde test harness) -----------------
//
// drain_layout_pending() se cablea via cfg.pre_frame (ver setup_layouts) — se
// ejecuta entre NewFrame y app_menubar/auto-dockspace. ImGui requiere que
// LoadIniSettingsFromMemory ocurra ANTES de cualquier Begin() del frame para
// restaurar dock state correctamente; mid-frame las ventanas docked vuelven
// a aparecer flotantes.
//
// Auto-dockspace lo provee el framework (cfg.auto_dockspace=true por default)
// — no llamamos DockSpaceOverViewport aqui para no duplicar.
void render() {
    using namespace navegator;
    if (show_browsers)    render_browsers_panel(&show_browsers);
    if (show_tabs)        render_tabs_panel(&show_tabs);
    if (show_tab_detail)  render_tab_detail_panel(&show_tab_detail);
    if (show_network)     render_network_panel(&show_network);
    if (show_agent)       app_agent::chat_render(&show_agent);
    if (show_autoextract) render_autoextract_panel(&show_autoextract);
    if (show_recipes)     render_recipes_panel(&show_recipes);
}

#ifndef FN_TEST_BUILD
int main() {
    fn::AppConfig cfg;
    cfg.title          = "Navegator Dashboard";
    cfg.about          = {
        "Navegator Dashboard",
        "0.3.1",
        "Cuadro de mandos Chrome (CDP) — Browsers + Tabs + Network DevTools-like + agente."
    };
    cfg.panels         = navegator::k_panels;
    cfg.panel_count    = sizeof(navegator::k_panels) / sizeof(navegator::k_panels[0]);
    cfg.init_gl_loader = false;
    cfg.log            = {"navegator_dashboard.log", 1};

    navegator::setup_layouts(cfg);

    navegator::start_api_server(19333);

    std::string app_dir = fn::exe_dir();
    std::string fake_app_db = std::string(fn::local_dir()) + "/_chat.db";
    app_agent::chat_init("", fake_app_db.c_str(), app_dir.c_str());

    int rc = fn::run_app(cfg, render);

    navegator::teardown_layouts();
    return rc;
}
#endif