#include "button.h"
#include "display.h"
#include "http_api.h"
#include "jpeg_decoder.h"
#include "local_screens.h"
#include "mdns_service.h"
#include "net_eth.h"
#include "nvs_config.h"
#include "state_client.h"
#include "state_machine.h"
#include "touch.h"
#include "viewport_state.h"

#include "esp_event.h"
#include "esp_log.h"
#include "esp_netif.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "nvs_flash.h"

static const char *TAG = "viewport";

// Log a status line for one subsystem and accumulate a one-letter flag into
// `status` (uppercase = up, lowercase = degraded/unavailable). Lets the
// boot log end with a single line summarizing what's actually live, so
// running with no LAN / no panel is a self-describing degraded mode rather
// than a panic.
static inline void mark(esp_err_t err, char up, char *slot)
{
    *slot = (err == ESP_OK) ? up : (char)(up + 0x20);  // 'A' -> 'a' on failure
}

static void display_setup_task(void *arg);

void app_main(void)
{
    ESP_ERROR_CHECK(nvs_flash_init());
    ESP_ERROR_CHECK(esp_netif_init());
    ESP_ERROR_CHECK(esp_event_loop_create_default());

    viewport_state_init();
    nvs_config_load();  // apply persisted config over defaults (best-effort)
    ESP_LOGI(TAG, "Scrypted Viewport boot (v%s)", VIEWPORT_VERSION);

    // ------------------------------------------------------------------
    // Networking. Driver starts even with no cable plugged in; we just
    // don't get a DHCP lease. mDNS + HTTP advertise / bind anyway and will
    // start serving the moment the link comes up.
    // ------------------------------------------------------------------
    char flags[8] = { '-','-','-','-','-','-','-', 0 };  // E M H D J T B
    esp_err_t eth_err = net_eth_init();
    mark(eth_err, 'E', &flags[0]);

    bool got_ip = false;
    if (eth_err == ESP_OK) {
        got_ip = (net_eth_wait_for_ip(15 * 1000) == ESP_OK);
        if (got_ip) {
            ESP_LOGI(TAG, "online at %s", net_eth_get_ip_str());
        } else {
            ESP_LOGW(TAG, "no DHCP lease after 15s — Ethernet driver will keep "
                          "retrying in the background; mDNS + HTTP up anyway");
        }
    }

    ESP_ERROR_CHECK(state_machine_init());
    ESP_ERROR_CHECK(state_client_init());
    mark(mdns_service_start(), 'M', &flags[1]);
    mark(http_api_start(),     'H', &flags[2]);

    // ------------------------------------------------------------------
    // Display + I²C-bound peripherals run on their own task. ESP-IDF's
    // esp_lcd_new_dsi_bus() spins forever in a PHY-PLL busy-wait if the
    // config is even slightly off; keeping that off the main task means
    // a misconfigured panel can't take down networking + /state. The
    // task also brings up the JPEG decoder and touch (touch shares the
    // panel I²C bus).
    // ------------------------------------------------------------------
    mark(button_init(), 'B', &flags[6]);

    ESP_LOGI(TAG, "boot complete — net subsystems [%s] ip=%s; "
                  "display init deferred to dsp_init task",
             flags, got_ip ? net_eth_get_ip_str() : "(no link)");

    xTaskCreate(display_setup_task, "dsp_init", 4096, NULL, 1, NULL);
}

static void display_setup_task(void *arg)
{
    char flags[4] = {'-', '-', '-', 0}; // D J T + NUL
    esp_err_t dsp_err = display_init();
    mark(dsp_err, 'D', &flags[0]);

    if (dsp_err == ESP_OK) {
        local_screens_init();
        // Show solid-color test sequence for ~6 s so we can characterize the
        // garble: solid red, then solid green, then solid blue, each for 2s.
        // If the panel paints a single uniform color (or close to it) for
        // each, the issue is the text rendering only. If even solid colors
        // are garbled, it's a stride / pixel-format bug deeper down.
        display_wake();
        display_fill(0xF800); vTaskDelay(pdMS_TO_TICKS(2000));   // red
        display_fill(0x07E0); vTaskDelay(pdMS_TO_TICKS(2000));   // green
        display_fill(0x001F); vTaskDelay(pdMS_TO_TICKS(2000));   // blue
        display_sleep();
    }

    mark(jpeg_decoder_init(), 'J', &flags[1]);

    if (dsp_err == ESP_OK) {
        mark(touch_init(), 'T', &flags[2]);
    } else {
        ESP_LOGI(TAG, "touch skipped (display not up)");
    }

    ESP_LOGI(TAG, "display subsystems [%s] up", flags);
    vTaskDelete(NULL);
}