// retoor <retoor@molodetz.nl>
#include "agent.h"
#include "db.h"
#include "http_client.h"
#include "r_config.h"
#include "r_error.h"
#include "spawn_tracker.h"
#include "tool.h"
#include "line.h"
#include "markdown.h"
#include "utils.h"
#include <curl/curl.h>
#include <json-c/json.h>
#include <locale.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
static volatile sig_atomic_t sigint_count = 0;
static time_t first_sigint_time = 0;
static bool syntax_highlight_enabled = true;
static bool api_mode = false;
static db_handle global_db = NULL;
static messages_handle global_messages = NULL;
extern tool_registry_t *tools_get_registry(void);
extern void tools_registry_shutdown(void);
static bool include_file(const char *path);
static char *get_prompt_from_stdin(char *prompt);
static char *get_prompt_from_args(int argc, char **argv);
static bool try_prompt(int argc, char *argv[]);
static void repl(void);
static void init(void);
static void cleanup(void);
static void handle_sigint(int sig);
static char *get_env_string(void) {
  FILE *fp = popen("env", "r");
  if (!fp)
    return NULL;
  size_t buffer_size = 1024;
  size_t total_size = 0;
  char *output = malloc(buffer_size);
  if (!output) {
    pclose(fp);
    return NULL;
  }
  size_t bytes_read;
  while ((bytes_read = fread(output + total_size, 1, buffer_size - total_size,
                             fp)) > 0) {
    total_size += bytes_read;
    if (total_size >= buffer_size) {
      buffer_size *= 2;
      char *temp = realloc(output, buffer_size);
      if (!temp) {
        free(output);
        pclose(fp);
        return NULL;
      }
      output = temp;
    }
  }
  output[total_size] = '\0';
  pclose(fp);
  return output;
}
static char *get_prompt_from_stdin(char *prompt) {
  int index = 0;
  int c;
  while ((c = getchar()) != EOF) {
    prompt[index++] = (char)c;
  }
  prompt[index] = '\0';
  return prompt;
}
static char *get_prompt_from_args(int argc, char **argv) {
  r_config_handle cfg = r_config_get_instance();
  char *prompt = malloc(10 * 1024 * 1024 + 1);
  char *system_msg = malloc(1024 * 1024);
  if (!prompt || !system_msg) {
    free(prompt);
    free(system_msg);
    return NULL;
  }
  system_msg[0] = '\0';
  bool get_from_stdin = false;
  for (int i = 1; i < argc; i++) {
    if (strcmp(argv[i], "--stdin") == 0) {
      fprintf(stderr, "Reading from stdin.\n");
      get_from_stdin = true;
    } else if (strcmp(argv[i], "--verbose") == 0) {
      r_config_set_verbose(cfg, true);
    } else if (strcmp(argv[i], "--py") == 0 && i + 1 < argc) {
      char *py_file_path = expand_home_directory(argv[++i]);
      fprintf(stderr, "Including \"%s\".\n", py_file_path);
      include_file(py_file_path);
      free(py_file_path);
    } else if (strcmp(argv[i], "--context") == 0 && i + 1 < argc) {
      char *context_file_path = argv[++i];
      fprintf(stderr, "Including \"%s\".\n", context_file_path);
      include_file(context_file_path);
    } else if (strcmp(argv[i], "--api") == 0) {
      api_mode = true;
    } else if (strcmp(argv[i], "--nh") == 0) {
      syntax_highlight_enabled = false;
      fprintf(stderr, "Syntax highlighting disabled.\n");
    } else if (strncmp(argv[i], "--session=", 10) == 0) {
      continue;
    } else if (strcmp(argv[i], "-s") == 0 ||
               strcmp(argv[i], "--session") == 0) {
      i++;
      continue;
    } else {
      strcat(system_msg, argv[i]);
      strcat(system_msg, (i < argc - 1) ? " " : ".");
    }
  }
  if (get_from_stdin) {
    if (*system_msg && global_messages) {
      messages_add(global_messages, "system", system_msg);
    }
    prompt = get_prompt_from_stdin(prompt);
    free(system_msg);
  } else {
    free(prompt);
    prompt = system_msg;
  }
  if (!*prompt) {
    free(prompt);
    return NULL;
  }
  return prompt;
}
static bool try_prompt(int argc, char *argv[]) {
  char *prompt = get_prompt_from_args(argc, argv);
  if (prompt) {
    char *response = agent_chat(prompt, global_messages);
    if (!response) {
      printf("Could not get response from server\n");
      free(prompt);
      return false;
    }
    // response is already printed inside agent_run
    free(response);
    free(prompt);
    return true;
  }
  return false;
}
static bool include_file(const char *path) {
  char *file_content = read_file(path);
  if (!file_content)
    return false;
  if (global_messages) {
    messages_add(global_messages, "system", file_content);
  }
  free(file_content);
  return true;
}
static void repl(void) {
  r_config_handle cfg = r_config_get_instance();
  tool_registry_t *tools = tools_get_registry();
  line_init();
  char *line = NULL;
  while (true) {
    line = line_read("> ");
    if (!line || !*line)
      continue;
    if (!strncmp(line, "!dump", 5)) {
      char *json = messages_to_string(global_messages);
      if (json) {
        printf("%s\n", json);
        free(json);
      }
      continue;
    }
    if (!strncmp(line, "!clear", 6)) {
      messages_clear(global_messages);
      fprintf(stderr, "Session cleared.\n");
      continue;
    }
    if (!strncmp(line, "!session", 8)) {
      printf("Session: %s\n", messages_get_session_id(global_messages));
      continue;
    }
    if (!strncmp(line, "!new", 4)) {
      messages_clear(global_messages);
      char session_id[64];
      snprintf(session_id, sizeof(session_id), "session-%d-%ld", getpid(), (long)time(NULL));
      messages_set_session_id(global_messages, session_id);
      fprintf(stderr, "New session: %s\n", session_id);
      continue;
    }
    if (!strncmp(line, "!verbose", 8)) {
      bool verbose = !r_config_is_verbose(cfg);
      r_config_set_verbose(cfg, verbose);
      fprintf(stderr, "%s\n",
              verbose ? "Verbose mode enabled" : "Verbose mode disabled");
      continue;
    }
    if (line && *line != '\n') {
      line_add_history(line);
    }
    if (!strncmp(line, "!tools", 6)) {
      struct json_object *descs = tool_registry_get_descriptions(tools);
      printf("Available tools: %s\n", json_object_to_json_string(descs));
      continue;
    }
    if (!strncmp(line, "!models", 7)) {
      http_client_handle http = http_client_create(r_config_get_api_key(cfg));
      if (http) {
        http_client_set_show_spinner(http, false);
        char *response = NULL;
        if (http_get(http, r_config_get_models_url(cfg), &response) ==
                R_SUCCESS &&
            response) {
          printf("Models: %s\n", response);
          free(response);
        }
        http_client_destroy(http);
      }
      continue;
    }
    if (!strncmp(line, "!model", 6)) {
      if (line[6] == ' ') {
        r_config_set_model(cfg, line + 7);
      }
      printf("Current model: %s\n", r_config_get_model(cfg));
      continue;
    }
    if (!strncmp(line, "exit", 4)) {
      exit(0);
    }
    while (line && *line != '\n') {
      char *response = agent_chat(line, global_messages);
      if (response) {
        // response is already printed inside agent_run via
        // parse_markdown_to_ansi
        free(response);
      } else {
        fprintf(stderr, "Agent returned no response\n");
      }
      line = NULL;
    }
  }
}
static void init(void) {
  curl_global_init(CURL_GLOBAL_DEFAULT);
  setbuf(stdout, NULL);
  line_init();
  r_config_handle cfg = r_config_get_instance();
  global_db = db_open(NULL);
  global_messages = messages_create(r_config_get_session_id(cfg));
  char *schema = db_get_schema(global_db);
  char payload[1024 * 1024] = {0};
  time_t now = time(NULL);
  struct tm *tm_info = localtime(&now);
  char datetime[64];
  strftime(datetime, sizeof(datetime), "%Y-%m-%d %H:%M:%S %Z", tm_info);
  char cwd[4096];
  if (!getcwd(cwd, sizeof(cwd))) {
    strcpy(cwd, "unknown");
  }
  snprintf(
      payload, sizeof(payload),
      "# AUTONOMOUS AGENT INSTRUCTIONS\n"
      "Current date/time: %s\n"
      "Working directory: %s\n\n"
      "You are an autonomous AI agent with tools and sub-agents at your disposal.\n\n"
      "## RULE #1: CLASSIFY BEFORE ACTING\n"
      "Before doing ANYTHING, classify the user's request:\n\n"
      "**SIMPLE** — questions, greetings, opinions, math, explanations, "
      "small file reads/writes, single-step tasks:\n"
      "  -> Respond directly with text. Use a tool ONLY if the user explicitly "
      "asks for something that requires one (e.g. 'read file X', 'search for Y').\n"
      "  -> Do NOT browse files, update PROJECT_KNOWLEDGE.md, or spawn agents.\n"
      "  -> Do NOT use tools just to 'explore' or 'get context'.\n\n"
      "**COMPLEX** — multi-step research, building projects, security audits, "
      "tasks that require multiple tools or sub-agents:\n"
      "  -> Use the full orchestration framework described below.\n"
      "  -> Keep using tools until the task is fully complete.\n\n"
      "If unsure, treat it as SIMPLE. Only escalate to COMPLEX when the task "
      "clearly requires multiple steps.\n\n"
      "## Orchestration Framework (COMPLEX tasks only)\n"
      "You are the **Executive Agent (Apex)**. Delegate to specialized sub-agents:\n"
      "- **researcher**: Information gathering, web search, data extraction\n"
      "- **developer**: Coding, testing, debugging, file creation\n"
      "- **security**: Security audits, vulnerability analysis\n"
      "- **fetcher**: URL content retrieval\n\n"
      "### Hierarchy\n"
      "- **Executive (Apex)**: Final arbiter. Owns the Strategic Blueprint.\n"
      "- **Managers**: Create detailed Task Packs. Synthesize sub-agent outputs.\n"
      "- **Workers**: Execute atomic tasks.\n\n"
      "### Protocols (COMPLEX tasks only)\n"
      "1. **Strategic Blueprint**: Output a blueprint: Mission, Departments, Checklist.\n"
      "2. **Sequential Handover**: Do not spawn a Developer until the Researcher "
      "has delivered documented facts to `PROJECT_KNOWLEDGE.md`.\n"
      "3. **Content Depth Guardrail**: Placeholder text is a failure. Use "
      "'read_file' to audit sub-agent work before concluding.\n"
      "4. **Global Task Registry (GTR)**: Query GTR for every sub-task. "
      "DUPLICATION IS FORBIDDEN.\n"
      "5. **Fan-Out Architecture**: Manager calls `web_search` to get URLs, "
      "then uses `research_dispatcher` to queue them.\n\n"
      "### Shared Memory (COMPLEX tasks only)\n"
      "- Update `PROJECT_KNOWLEDGE.md` with new findings.\n"
      "- All sub-agents receive the full content of `PROJECT_KNOWLEDGE.md`.\n\n"
      "### Sub-Agent Result Handling\n"
      "When a sub-agent returns, read and synthesize the result. "
      "If the user asked to save results, call write_file yourself.\n\n"
      "### Spawn Limits\n"
      "The system enforces spawn depth and total spawn limits automatically.\n\n"
      "## Tool Usage (when tools are needed)\n"
      "- Only use tools when the task requires them.\n"
      "- If a tool fails, analyze and retry with a different approach.\n"
      "- When working on a COMPLEX task, keep calling tools until done.\n\n"
      "## Output Rules\n"
      "- When you use tools, include actual data from results in your response.\n"
      "- Do not claim a task is done unless verified.\n"
      "- For COMPLEX tasks, perform one logical step at a time.\n"
      "## Python\n"
      "Use native python only, no 3rd party packages unless verified installed.\n"
      "## Local Database\n"
      "SQLite via db_query, db_get, db_set. Use stemmed lowercase keys.\n"
      "Schema: %s\n\n"
      "## Response Format\n"
      "Your response is the only thing the user sees. Tool outputs are hidden.\n"
      "Copy relevant data from tool results into your response.\n"
      "## Backup\n"
      "Make a .bak backup before editing files you did not create.\n"
      "## Terminal\n"
      "You have bash access. Prefer commands that do not require root.\n",
      datetime, cwd, schema ? schema : "{}");
  free(schema);
  fprintf(stderr, "Loading...");
  if (global_messages) {
    messages_add(global_messages, "system", payload);
  }
  const char *env_system_msg = r_config_get_system_message(cfg);
  if (env_system_msg && *env_system_msg && global_messages) {
    messages_add(global_messages, "system", env_system_msg);
  }
  if (!include_file(".rcontext.txt")) {
    include_file("~/.rcontext.txt");
  }
  fprintf(stderr, "\r                          \r");
}
static void cleanup(void) {
  if (global_messages) {
    messages_destroy(global_messages);
    global_messages = NULL;
  }
  if (global_db) {
    db_close(global_db);
    global_db = NULL;
  }
  tools_registry_shutdown();
  spawn_tracker_destroy();
  r_config_destroy();
}
static void handle_sigint(int sig) {
  (void)sig;
  time_t current_time = time(NULL);
  printf("\n");
  if (sigint_count == 0) {
    first_sigint_time = current_time;
    sigint_count++;
  } else {
    if (difftime(current_time, first_sigint_time) <= 1) {
      cleanup();
      exit(0);
    } else {
      sigint_count = 1;
      first_sigint_time = current_time;
    }
  }
}
static void parse_session_arg(int argc, char *argv[]) {
  r_config_handle cfg = r_config_get_instance();
  for (int i = 1; i < argc; i++) {
    if (strncmp(argv[i], "--session=", 10) == 0) {
      const char *name = argv[i] + 10;
      if (!r_config_set_session_id(cfg, name)) {
        fprintf(stderr, "Error: Invalid session name '%s'\n", name);
        exit(1);
      }
      return;
    }
    if ((strcmp(argv[i], "-s") == 0 || strcmp(argv[i], "--session") == 0) &&
        i + 1 < argc) {
      const char *name = argv[++i];
      if (!r_config_set_session_id(cfg, name)) {
        fprintf(stderr, "Error: Invalid session name '%s'\n", name);
        exit(1);
      }
      return;
    }
  }
}
int main(int argc, char *argv[]) {
  signal(SIGINT, handle_sigint);
  atexit(cleanup);
  parse_session_arg(argc, argv);
  init();
  char *env_string = get_env_string();
  if (env_string && *env_string && global_messages) {
    messages_add(global_messages, "system", env_string);
    free(env_string);
  }
  messages_load(global_messages);
  if (try_prompt(argc, argv)) {
    return 0;
  }
  repl();
  return 0;
}