#include "cli_factions_catalog.hpp"
#include "cli_arg_parse.hpp"
#include "cli_box_emitter.hpp"

#include "pipeline/wowee_factions.hpp"
#include <nlohmann/json.hpp>

#include <cstdint>
#include <cstdio>
#include <cstring>
#include <fstream>
#include <string>
#include <vector>

namespace wowee {
namespace editor {
namespace cli {

namespace {

std::string stripWfacExt(std::string base) {
    stripExt(base, ".wfac");
    return base;
}

void appendRepFlagsStr(std::string& s, uint32_t flags) {
    if (flags & wowee::pipeline::WoweeFaction::VisibleOnTab) s += "visible ";
    if (flags & wowee::pipeline::WoweeFaction::AtWarDefault) s += "at-war ";
    if (flags & wowee::pipeline::WoweeFaction::Hidden)       s += "hidden ";
    if (flags & wowee::pipeline::WoweeFaction::NoReputation) s += "no-rep ";
    if (flags & wowee::pipeline::WoweeFaction::IsHeader)     s += "header ";
    if (s.empty()) s = "-";
    else if (s.back() == ' ') s.pop_back();
}

bool saveOrError(const wowee::pipeline::WoweeFaction& c,
                 const std::string& base, const char* cmd) {
    if (!wowee::pipeline::WoweeFactionLoader::save(c, base)) {
        std::fprintf(stderr, "%s: failed to save %s.wfac\n",
                     cmd, base.c_str());
        return false;
    }
    return true;
}

void printGenSummary(const wowee::pipeline::WoweeFaction& c,
                     const std::string& base) {
    std::printf("Wrote %s.wfac\n", base.c_str());
    std::printf("  catalog  : %s\n", c.name.c_str());
    std::printf("  factions : %zu\n", c.entries.size());
}

int handleGenStarter(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "StarterFactions";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWfacExt(base);
    auto c = wowee::pipeline::WoweeFactionLoader::makeStarter(name);
    if (!saveOrError(c, base, "gen-factions")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleGenAlliance(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "AllianceFactions";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWfacExt(base);
    auto c = wowee::pipeline::WoweeFactionLoader::makeAlliance(name);
    if (!saveOrError(c, base, "gen-factions-alliance")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleGenWildlife(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    std::string name = "WildlifeFactions";
    if (parseOptArg(i, argc, argv)) name = argv[++i];
    base = stripWfacExt(base);
    auto c = wowee::pipeline::WoweeFactionLoader::makeWildlife(name);
    if (!saveOrError(c, base, "gen-factions-wildlife")) return 1;
    printGenSummary(c, base);
    return 0;
}

int handleInfo(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    bool jsonOut = consumeJsonFlag(i, argc, argv);
    base = stripWfacExt(base);
    if (!wowee::pipeline::WoweeFactionLoader::exists(base)) {
        std::fprintf(stderr, "WFAC not found: %s.wfac\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeFactionLoader::load(base);
    if (jsonOut) {
        nlohmann::json j;
        j["wfac"] = base + ".wfac";
        j["name"] = c.name;
        j["count"] = c.entries.size();
        nlohmann::json arr = nlohmann::json::array();
        for (const auto& e : c.entries) {
            std::string fs;
            appendRepFlagsStr(fs, e.reputationFlags);
            nlohmann::json je;
            je["factionId"] = e.factionId;
            je["parentFactionId"] = e.parentFactionId;
            je["name"] = e.name;
            je["description"] = e.description;
            je["reputationFlags"] = e.reputationFlags;
            je["reputationFlagsStr"] = fs;
            je["baseReputation"] = e.baseReputation;
            je["thresholdHostile"] = e.thresholdHostile;
            je["thresholdUnfriendly"] = e.thresholdUnfriendly;
            je["thresholdNeutral"] = e.thresholdNeutral;
            je["thresholdFriendly"] = e.thresholdFriendly;
            je["thresholdHonored"] = e.thresholdHonored;
            je["thresholdRevered"] = e.thresholdRevered;
            je["thresholdExalted"] = e.thresholdExalted;
            je["enemies"] = e.enemies;
            je["friends"] = e.friends;
            arr.push_back(je);
        }
        j["entries"] = arr;
        std::printf("%s\n", j.dump(2).c_str());
        return 0;
    }
    std::printf("WFAC: %s.wfac\n", base.c_str());
    std::printf("  catalog  : %s\n", c.name.c_str());
    std::printf("  factions : %zu\n", c.entries.size());
    if (c.entries.empty()) return 0;
    std::printf("    id     parent  flags        enemies  friends   name\n");
    for (const auto& e : c.entries) {
        std::string fs;
        appendRepFlagsStr(fs, e.reputationFlags);
        std::printf("  %4u    %4u    %-12s   %2zu     %2zu       %s\n",
                    e.factionId, e.parentFactionId, fs.c_str(),
                    e.enemies.size(), e.friends.size(),
                    e.name.c_str());
    }
    return 0;
}

int handleExportJson(int& i, int argc, char** argv) {
    // Mirrors the JSON pairs added for every other novel
    // open format. Each faction emits all 13 scalar fields
    // plus the variable-length enemies + friends arrays and
    // a string-array form for the reputation flag bitset.
    std::string base = argv[++i];
    std::string outPath;
    if (parseOptArg(i, argc, argv)) outPath = argv[++i];
    base = stripWfacExt(base);
    if (outPath.empty()) outPath = base + ".wfac.json";
    if (!wowee::pipeline::WoweeFactionLoader::exists(base)) {
        std::fprintf(stderr,
            "export-wfac-json: WFAC not found: %s.wfac\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeFactionLoader::load(base);
    nlohmann::json j;
    j["name"] = c.name;
    nlohmann::json arr = nlohmann::json::array();
    for (const auto& e : c.entries) {
        nlohmann::json je;
        je["factionId"] = e.factionId;
        je["parentFactionId"] = e.parentFactionId;
        je["name"] = e.name;
        je["description"] = e.description;
        je["reputationFlags"] = e.reputationFlags;
        nlohmann::json fa = nlohmann::json::array();
        if (e.reputationFlags & wowee::pipeline::WoweeFaction::VisibleOnTab) fa.push_back("visible");
        if (e.reputationFlags & wowee::pipeline::WoweeFaction::AtWarDefault) fa.push_back("at-war");
        if (e.reputationFlags & wowee::pipeline::WoweeFaction::Hidden)       fa.push_back("hidden");
        if (e.reputationFlags & wowee::pipeline::WoweeFaction::NoReputation) fa.push_back("no-rep");
        if (e.reputationFlags & wowee::pipeline::WoweeFaction::IsHeader)     fa.push_back("header");
        je["reputationFlagsList"] = fa;
        je["baseReputation"] = e.baseReputation;
        je["thresholdHostile"] = e.thresholdHostile;
        je["thresholdUnfriendly"] = e.thresholdUnfriendly;
        je["thresholdNeutral"] = e.thresholdNeutral;
        je["thresholdFriendly"] = e.thresholdFriendly;
        je["thresholdHonored"] = e.thresholdHonored;
        je["thresholdRevered"] = e.thresholdRevered;
        je["thresholdExalted"] = e.thresholdExalted;
        je["enemies"] = e.enemies;
        je["friends"] = e.friends;
        arr.push_back(je);
    }
    j["entries"] = arr;
    std::ofstream out(outPath);
    if (!out) {
        std::fprintf(stderr,
            "export-wfac-json: cannot write %s\n", outPath.c_str());
        return 1;
    }
    out << j.dump(2) << "\n";
    out.close();
    std::printf("Wrote %s\n", outPath.c_str());
    std::printf("  source   : %s.wfac\n", base.c_str());
    std::printf("  factions : %zu\n", c.entries.size());
    return 0;
}

int handleImportJson(int& i, int argc, char** argv) {
    std::string jsonPath = argv[++i];
    std::string outBase;
    if (parseOptArg(i, argc, argv)) outBase = argv[++i];
    if (outBase.empty()) {
        outBase = jsonPath;
        std::string suffix = ".wfac.json";
        if (outBase.size() > suffix.size() &&
            outBase.substr(outBase.size() - suffix.size()) == suffix) {
            outBase = outBase.substr(0, outBase.size() - suffix.size());
        } else if (outBase.size() > 5 &&
                   outBase.substr(outBase.size() - 5) == ".json") {
            outBase = outBase.substr(0, outBase.size() - 5);
        }
    }
    outBase = stripWfacExt(outBase);
    std::ifstream in(jsonPath);
    if (!in) {
        std::fprintf(stderr,
            "import-wfac-json: cannot read %s\n", jsonPath.c_str());
        return 1;
    }
    nlohmann::json j;
    try { in >> j; }
    catch (const std::exception& e) {
        std::fprintf(stderr,
            "import-wfac-json: bad JSON in %s: %s\n",
            jsonPath.c_str(), e.what());
        return 1;
    }
    auto repFlagFromName = [](const std::string& s) -> uint32_t {
        if (s == "visible") return wowee::pipeline::WoweeFaction::VisibleOnTab;
        if (s == "at-war")  return wowee::pipeline::WoweeFaction::AtWarDefault;
        if (s == "hidden")  return wowee::pipeline::WoweeFaction::Hidden;
        if (s == "no-rep")  return wowee::pipeline::WoweeFaction::NoReputation;
        if (s == "header")  return wowee::pipeline::WoweeFaction::IsHeader;
        return 0;
    };
    auto readU32Vec = [](const nlohmann::json& jv, std::vector<uint32_t>& v) {
        if (jv.is_array()) {
            for (const auto& e : jv) {
                if (e.is_number_integer()) v.push_back(e.get<uint32_t>());
            }
        }
    };
    wowee::pipeline::WoweeFaction c;
    c.name = j.value("name", std::string{});
    if (j.contains("entries") && j["entries"].is_array()) {
        for (const auto& je : j["entries"]) {
            wowee::pipeline::WoweeFaction::Entry e;
            e.factionId = je.value("factionId", 0u);
            e.parentFactionId = je.value("parentFactionId", 0u);
            e.name = je.value("name", std::string{});
            e.description = je.value("description", std::string{});
            if (je.contains("reputationFlags") &&
                je["reputationFlags"].is_number_integer()) {
                e.reputationFlags = je["reputationFlags"].get<uint32_t>();
            } else if (je.contains("reputationFlagsList") &&
                       je["reputationFlagsList"].is_array()) {
                e.reputationFlags = 0;
                for (const auto& f : je["reputationFlagsList"]) {
                    if (f.is_string())
                        e.reputationFlags |= repFlagFromName(f.get<std::string>());
                }
            }
            e.baseReputation = je.value("baseReputation", 0);
            e.thresholdHostile = je.value("thresholdHostile",
                static_cast<int32_t>(wowee::pipeline::WoweeFaction::Hostile));
            e.thresholdUnfriendly = je.value("thresholdUnfriendly",
                static_cast<int32_t>(wowee::pipeline::WoweeFaction::Unfriendly));
            e.thresholdNeutral = je.value("thresholdNeutral", 0);
            e.thresholdFriendly = je.value("thresholdFriendly",
                static_cast<int32_t>(wowee::pipeline::WoweeFaction::Friendly));
            e.thresholdHonored = je.value("thresholdHonored",
                static_cast<int32_t>(wowee::pipeline::WoweeFaction::Honored));
            e.thresholdRevered = je.value("thresholdRevered",
                static_cast<int32_t>(wowee::pipeline::WoweeFaction::Revered));
            e.thresholdExalted = je.value("thresholdExalted",
                static_cast<int32_t>(wowee::pipeline::WoweeFaction::Exalted));
            if (je.contains("enemies")) readU32Vec(je["enemies"], e.enemies);
            if (je.contains("friends")) readU32Vec(je["friends"], e.friends);
            c.entries.push_back(std::move(e));
        }
    }
    if (!wowee::pipeline::WoweeFactionLoader::save(c, outBase)) {
        std::fprintf(stderr,
            "import-wfac-json: failed to save %s.wfac\n", outBase.c_str());
        return 1;
    }
    std::printf("Wrote %s.wfac\n", outBase.c_str());
    std::printf("  source   : %s\n", jsonPath.c_str());
    std::printf("  factions : %zu\n", c.entries.size());
    return 0;
}

int handleValidate(int& i, int argc, char** argv) {
    std::string base = argv[++i];
    bool jsonOut = consumeJsonFlag(i, argc, argv);
    base = stripWfacExt(base);
    if (!wowee::pipeline::WoweeFactionLoader::exists(base)) {
        std::fprintf(stderr,
            "validate-wfac: WFAC not found: %s.wfac\n", base.c_str());
        return 1;
    }
    auto c = wowee::pipeline::WoweeFactionLoader::load(base);
    std::vector<std::string> errors;
    std::vector<std::string> warnings;
    if (c.entries.empty()) {
        warnings.push_back("catalog has zero entries");
    }
    std::vector<uint32_t> idsSeen;
    idsSeen.reserve(c.entries.size());
    for (size_t k = 0; k < c.entries.size(); ++k) {
        const auto& e = c.entries[k];
        std::string ctx = "entry " + std::to_string(k) +
                          " (id=" + std::to_string(e.factionId);
        if (!e.name.empty()) ctx += " " + e.name;
        ctx += ")";
        if (e.factionId == 0) {
            errors.push_back(ctx + ": factionId is 0");
        }
        if (e.name.empty()) {
            errors.push_back(ctx + ": name is empty");
        }
        // Threshold ordering: hostile < unfriendly < neutral <
        // friendly < honored < revered < exalted.
        if (e.thresholdHostile >= e.thresholdUnfriendly ||
            e.thresholdUnfriendly >= e.thresholdNeutral ||
            e.thresholdNeutral >= e.thresholdFriendly ||
            e.thresholdFriendly >= e.thresholdHonored ||
            e.thresholdHonored >= e.thresholdRevered ||
            e.thresholdRevered >= e.thresholdExalted) {
            errors.push_back(ctx +
                ": reputation thresholds not strictly ascending "
                "(hostile<unfriendly<neutral<friendly<honored<revered<exalted)");
        }
        // Self-relationship: a faction can't be its own enemy.
        for (uint32_t en : e.enemies) {
            if (en == e.factionId) {
                errors.push_back(ctx + ": faction lists itself as enemy");
                break;
            }
        }
        for (uint32_t fr : e.friends) {
            if (fr == e.factionId) {
                errors.push_back(ctx + ": faction lists itself as friend");
                break;
            }
        }
        // A faction in both enemies AND friends is incoherent.
        for (uint32_t en : e.enemies) {
            for (uint32_t fr : e.friends) {
                if (en == fr) {
                    errors.push_back(ctx +
                        ": faction " + std::to_string(en) +
                        " appears in both enemies and friends");
                    break;
                }
            }
        }
        for (uint32_t prev : idsSeen) {
            if (prev == e.factionId) {
                errors.push_back(ctx + ": duplicate factionId");
                break;
            }
        }
        idsSeen.push_back(e.factionId);
    }
    bool ok = errors.empty();
    if (jsonOut) {
        nlohmann::json j;
        j["wfac"] = base + ".wfac";
        j["ok"] = ok;
        j["errors"] = errors;
        j["warnings"] = warnings;
        std::printf("%s\n", j.dump(2).c_str());
        return ok ? 0 : 1;
    }
    std::printf("validate-wfac: %s.wfac\n", base.c_str());
    if (ok && warnings.empty()) {
        std::printf("  OK — %zu factions, all factionIds unique\n",
                    c.entries.size());
        return 0;
    }
    if (!warnings.empty()) {
        std::printf("  warnings (%zu):\n", warnings.size());
        for (const auto& w : warnings)
            std::printf("    - %s\n", w.c_str());
    }
    if (!errors.empty()) {
        std::printf("  ERRORS (%zu):\n", errors.size());
        for (const auto& e : errors)
            std::printf("    - %s\n", e.c_str());
    }
    return ok ? 0 : 1;
}

} // namespace

bool handleFactionsCatalog(int& i, int argc, char** argv, int& outRc) {
    if (std::strcmp(argv[i], "--gen-factions") == 0 && i + 1 < argc) {
        outRc = handleGenStarter(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--gen-factions-alliance") == 0 && i + 1 < argc) {
        outRc = handleGenAlliance(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--gen-factions-wildlife") == 0 && i + 1 < argc) {
        outRc = handleGenWildlife(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--info-wfac") == 0 && i + 1 < argc) {
        outRc = handleInfo(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--validate-wfac") == 0 && i + 1 < argc) {
        outRc = handleValidate(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--export-wfac-json") == 0 && i + 1 < argc) {
        outRc = handleExportJson(i, argc, argv); return true;
    }
    if (std::strcmp(argv[i], "--import-wfac-json") == 0 && i + 1 < argc) {
        outRc = handleImportJson(i, argc, argv); return true;
    }
    return false;
}

} // namespace cli
} // namespace editor
} // namespace wowee